Geochemical data supporting investigation of solute and particle cycling and fluxes from two tidal wetlands on the south shore of Cape Cod, Massachusetts, 2012-19

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Metadata:

Identification_Information:
Citation:
Citation_Information:
Originator: Brooks, T.W.
Originator: Eagle, M.
Originator: Kroeger, K.D.
Originator: Mann, A.G.
Originator: Wang, Z.A.
Originator: Ganju, N.K.
Originator: O'Keefe Suttles, J.A.
Originator: Brosnahan, S.M.
Originator: Chu, S.N.
Originator: Song, S.
Originator: Pohlman, J.W.
Originator: Casso, M.
Originator: Tamborski, J.
Originator: Morkeski, K.
Originator: Carey, J.C.
Originator: Ganguli, P.M.
Originator: Williams, O.L.
Originator: Kurtz, A.C.
Publication_Date: 20210216
Title:
Geochemical data supporting investigation of solute and particle cycling and fluxes from two tidal wetlands on the south shore of Cape Cod, Massachusetts, 2012-19
Edition: 1.0
Geospatial_Data_Presentation_Form: tabulated comma-separated values files
Series_Information:
Series_Name: data release
Issue_Identification: DOI:10.5066/P9MXLUZ1
Publication_Information:
Publication_Place: Reston, VA
Publisher: U.S. Geological Survey
Other_Citation_Details:
Suggested citation: Brooks, T.W., Eagle, M., Kroeger, K.D., Mann, A.G., Wang, Z.A., Ganju, N.K., O'Keefe Suttles, J.A., Brosnahan, S.M., Chu, S.N., Song, S., Pohlman, J.W., Casso, M., Tamborski, J.J., Morkeski, K., Carey, J.C., Ganguli, P.M., Williams, O.L., and Kurtz, A.C., 2021, Geochemical data supporting investigation of solute and particle cycling and fluxes from two tidal wetlands on the south shore of Cape Cod, Massachusetts, 2012-19: U.S. Geological Survey data release, https://doi.org/10.5066/P9MXLUZ1.
Online_Linkage: https://doi.org/10.5066/P9MXLUZ1
Online_Linkage:
Description:
Abstract:
Assessment of geochemical cycling within tidal wetlands and measurement of fluxes of dissolved and particulate constituents between wetlands and coastal water bodies are critical to evaluating ecosystem function, service, and status. The U.S. Geological Survey and collaborators collected surface water and porewater geochemical data from a tidal wetland located on the eastern shore of Sage Lot Pond in Mashpee, Massachusetts, within the Waquoit Bay National Estuarine Research Reserve, between 2012 and 2019. Additional porewater geochemical and field data from a tidal wetland on the eastern shore of Great Pond in East Falmouth, MA are also included. These data can be used to evaluate biogeochemical conditions and cycling of carbon and other elements within the marsh platform and to calculate lateral tidal exchange fluxes of a suite of dissolved and particulate constituents between the wetland and estuary. Analytes include but are not limited to: dissolved oxygen, oxidation reduction potential, pH, salinity, dissolved and particulate organic and inorganic carbon, stable carbon isotopic ratios, nitrogen species, phosphate, silica, dissolved methane and nitrous oxide gas, trace elements, radium isotopes, alkalinity, and sulfide. Much of the surface water data at Sage Lot Pond was collected from the mouth of a tidal creek across full-tidal (12 to 14 hour) timeseries sampling events at 0.5 to 2-hour intervals at different points in the spring/ neap cycle and season. Porewater samples were collected at multiple depths (9 to 245 centimeters) in transects extending across the marsh platform at different times in the season between 2014 and 2019. Sage Lot Pond creek data are concurrent with extended time-series measurement of water quality and flow data measured with deployed sensors in the tidal creek (Mann and others, 2019), and with carbonate chemistry data measured at the site (Wang and others, 2019, 2020).
Purpose:
The purpose of this study was to evaluate biogeochemical conditions and cycling of carbon and other elements within the marsh platform and to calculate lateral tidal exchange fluxes of a suite of dissolved and particulate constituents between the wetland and estuary.
Supplemental_Information:
Related external resources:
Chu, S.N., Wang, Z.A., Gonneea, M.E., Kroeger, K.D. and Ganju, N.K., 2018, Deciphering the dynamics of inorganic carbon export from intertidal salt marshes using high-frequency measurements: Marine Chemistry, 206, pp.7-18, https://doi.org/10.1016/j.marchem.2018.08.005.
Mann, A.G., O'Keefe Suttles, J.A., Gonneea, M.E., Brosnahan, S.M., Brooks, T.W., Wang, Z.A., Ganju, N.K., and Kroeger, K.D., 2019, Time-series of biogeochemical and flow data from a tidal salt-marsh creek, Sage Lot Pond, Waquoit Bay, Massachusetts (2012-2016): U.S. Geological Survey data release, https://doi.org/10.5066/P9STIROQ.
Song, S., Wang, Z.A., Gonneea, M.E., Kroeger, K.D., Chu, S.N., Li, D. and Liang, H., 2020, An important biogeochemical link between organic and inorganic carbon cycling: Effects of organic alkalinity on carbonate chemistry in coastal waters influenced by intertidal salt marshes: Geochimica et Cosmochimica Acta, 275, pp.123-139, https://doi.org/10.1016/j.gca.2020.02.013.
Tamborski, J., Eagle, M., Kurylyk, B.L., Kroeger, K.D., Wang, Z.A., Henderson, P., and Charette, M.A., 2021, Porewater exchange driven inorganic carbon export from intertidal salt marshes: Limnology and Oceanography, https://doi.org/10.1002/lno.11721.
Wang, Z.A., Kroeger, K.D., Ganju, N.K., Gonneea, M.E. and Chu, S.N., 2016, Intertidal salt marshes as an important source of inorganic carbon to the coastal ocean: Limnology and Oceanography, 61(5), pp.1916-1931, https://doi.org/10.1002/lno.10347.
Wang, Z., Kroeger, K., Gonneea, M., 2019, Discrete bottle sample measurements for carbonate chemistry from samples collected in the Sage Lot Pond salt marsh tidal creek in Waquoit Bay, MA from 2012 to 2015: Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 1) Version Date 2019-05-23, https://doi.org/10.1575/1912/bco-dmo.768577.1.
Wang, Z., Song, S., Gonneea, M., Kroeger, K., 2020, Discrete bottle sample measurements for carbonate chemistry, organic alkalinity and organic carbon from samples collected in Waquoit Bay and Vineyard Sound, MA in 2016: Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 1) Version Date 2020-02-25, https://doi.org/10.1575/1912/bco-dmo.794163.1.
Data collected between 2012 and 2016 are associated with the following USGS field activities:
2012-013-FA 2012-033-FA 2012-049-FA 2013-037-FA 2014-081-FA 2014-078-FA 2014-080-FA 2014-079-FA 2015-038-FA 2015-039-FA 2015-040-FA 2015-046-FA 2015-050-FA 2015-066-FA 2015-070-FA 2015-069-FA 2016-015-FA 2016-025-FA 2016-026-FA 2016-028-FA 2016-048-FA 2016-049-FA
Additional information for the field activities (2012-2016) associated with this dataset can be acquired from the field activity landing page, by prepending https://cmgds.marine.usgs.gov/fan_info.php?fan= to the field activity number, e.g., https://cmgds.marine.usgs.gov/fan_info.php?fan=2012-013-FA. Additional porewater data collections in 2018 and 2019 do not have corresponding USGS field activity numbers since those sampling efforts were carried out by coauthors affiliated with an outside institution.
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date: 20120409
Ending_Date: 20191107
Currentness_Reference: Ground condition of when samples were collected.
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -70.58060
East_Bounding_Coordinate: -70.50541
North_Bounding_Coordinate: 41.55680
South_Bounding_Coordinate: 41.55255
Keywords:
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: porewater chemistry
Theme_Keyword: tidal wetland
Theme_Keyword: particulate organic carbon
Theme_Keyword: carbon isotopes
Theme_Keyword: dissolved inorganic carbon
Theme_Keyword: dissolved organic carbon
Theme_Keyword: dissolved oxygen
Theme_Keyword: climate change
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: geoscientificInformation
Theme_Keyword: environment
Theme:
Theme_Keyword_Thesaurus: USGS Thesaurus
Theme_Keyword: isotopic analysis
Theme_Keyword: water chemistry
Theme_Keyword: water quality
Theme_Keyword: geochemistry
Theme_Keyword: biogeochemical cycling
Theme_Keyword: carbon sequestration
Theme_Keyword: salinity
Theme:
Theme_Keyword_Thesaurus: USGS Metadata Identifier
Theme_Keyword: USGS:5fd0c4c0d34e30b91239b615
Place:
Place_Keyword_Thesaurus: None
Place_Keyword: Cape Cod
Place_Keyword: Waquoit Bay
Place_Keyword: Great Pond
Place_Keyword: Falmouth
Place_Keyword: Mashpee
Place_Keyword: Sage Lot Pond
Place_Keyword: Massachusetts
Place_Keyword: United States
Access_Constraints: None.
Use_Constraints: None.
Point_of_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological Survey
Contact_Person: Thomas W. Brooks
Contact_Position: Physical Scientist
Contact_Address:
Address_Type: mailing and physical
Address: 384 Woods Hole Rd.
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
Country: USA
Contact_Voice_Telephone: 508-548-8700 x2359
Contact_Electronic_Mail_Address: wallybrooks@usgs.gov
Browse_Graphic:
Browse_Graphic_File_Name: Browse_Graphic_File_Description:
Aerial photo of the Sage Lot Pond study site, and inset photos showing full-tidal timeseries sampling at the creek mouth.
Browse_Graphic_File_Type: JPEG
Cross_Reference:
Citation_Information:
Originator: Song, S.
Originator: Wang, Z.A.
Originator: Gonneea, M.E.
Originator: Kroeger, K.D.
Originator: Chu, S.N.
Originator: Li, D.
Originator: Liang, H.
Publication_Date: 2020
Title:
An important biogeochemical link between organic and inorganic carbon cycling: Effects of organic alkalinity on carbonate chemistry in coastal waters influenced by intertidal salt marshes.
Series_Information:
Series_Name: Geochimica et Cosmochimica Acta
Issue_Identification: v. 275, p. 123-139
Publication_Information:
Publication_Place: Amsterdam, Netherlands
Publisher: Elsevier
Online_Linkage: https://doi.org/10.1016/j.gca.2020.02.013
Cross_Reference:
Citation_Information:
Originator: Chu, S.N.
Originator: Wang, Z.A.
Originator: Gonneea, M.E.
Originator: Kroeger, K.D.
Originator: Ganju, N.K.
Publication_Date: 2018
Title:
Deciphering the dynamics of inorganic carbon export from intertidal salt marshes using high-frequency measurements
Series_Information:
Series_Name: Marine Chemistry
Issue_Identification: v. 206, page 7-18
Publication_Information:
Publication_Place: Amsterdam, Netherlands
Publisher: Elsevier
Online_Linkage: https://doi.org/10.1016/j.marchem.2018.08.005
Cross_Reference:
Citation_Information:
Originator: Mann, A.G.
Originator: O'Keefe Suttles, J.A.
Originator: Gonneea, M.E.
Originator: Brosnahan, S.M.
Originator: Brooks, T.W.
Originator: Wang, Z.A.
Originator: Ganju, N.K.
Originator: Kroeger, K.D.
Publication_Date: 2019
Title:
Time-series of biogeochemical and flow data from a tidal salt-marsh creek, Sage Lot Pond, Waquoit Bay, Massachusetts (2012-2016)
Series_Information:
Series_Name: data release
Issue_Identification: DOI:10.5066/P9STIROQ
Publication_Information:
Publication_Place: Reston, VA
Publisher: U.S. Geological Survey
Online_Linkage: https://doi.org/10.5066/P9STIROQ
Cross_Reference:
Citation_Information:
Originator: Wang, Z.A.
Originator: Kroeger, K.D.
Originator: Ganju, N.K.
Originator: Gonneea, M.E.
Originator: Chu, S.N.
Publication_Date: 2016
Title:
Intertidal salt marshes as an important source of inorganic carbon to the coastal ocean
Series_Information:
Series_Name: Limnology and Oceanography
Issue_Identification: v. 61, p. 1916-1931
Publication_Information:
Publication_Place: Waco, TX
Publisher: The Association for the Sciences of Limnology and Oceanography
Online_Linkage: https://doi.org/10.1002/lno.10347
Cross_Reference:
Citation_Information:
Originator: Wang, Z.A.
Originator: Gonneea, M.E.
Originator: Kroeger, K.D.
Publication_Date: 2019
Title:
Discrete bottle sample measurements for carbonate chemistry from samples collected in the Sage Lot Pond salt marsh tidal creek in Waquoit Bay, MA from 2012 to 2015
Series_Information:
Series_Name: Woods Hole Open Access Server
Issue_Identification: dataset 768577
Publication_Information:
Publication_Place: Woods Hole, MA
Publisher: Biological and Chemical Oceanography Data Management Office
Online_Linkage: https://doi.org/10.1575/1912/bco-dmo.768577.1
Cross_Reference:
Citation_Information:
Originator: Wang, Z.A.
Originator: Song, S.
Originator: Gonneea, M.E.
Originator: Kroeger, K.D.
Publication_Date: 2020
Title:
Discrete bottle sample measurements for carbonate chemistry, organic alkalinity and organic carbon from samples collected in Waquoit Bay and Vineyard Sound, MA in 2016
Series_Information:
Series_Name: Woods Hole Open Access Server
Issue_Identification: dataset 794163
Publication_Information:
Publication_Place: Woods Hole, MA
Publisher: Biological and Chemical Oceanography Data Management Office
Online_Linkage: https://doi.org/10.1575/1912/bco-dmo. 794163.1
Cross_Reference:
Citation_Information:
Originator: Tamborski, J.
Originator: Eagle, M.
Originator: Kurylyk, B.L.
Originator: Kroeger, K.D.
Originator: Wang, Z.A.
Originator: Henderson, P.
Originator: Charette, M.A.
Publication_Date: 2021
Title:
Porewater exchange driven inorganic carbon export from intertidal salt marshes
Series_Information:
Series_Name: Limnology and Oceanography
Issue_Identification: online issue
Publication_Information:
Publication_Place: Waco, TX
Publisher: The Association for the Sciences of Limnology and Oceanography
Other_Citation_Details: Journal article utilizing data from this data release.
Online_Linkage: https://doi.org/10.1002/lno.11721
Data_Quality_Information:
Logical_Consistency_Report:
Analytical limits of detection are reported in the Attribute Definition, and the Process Description, when applicable. In a limited number of cases, post-processing of laboratory geochemical data resulted in slight negative values, insignificantly different from zero as based on known analytical precision and are reported as zero (0) in this dataset. Positive values that are below the analytical limit of detection are reported as measured and are not set to an arbitrary value such as 'zero' or 'BDL'. Note that any value below the reported limit of detection is truly an unknown value between zero and the limit of detection. Additional quality assurance information, including analytical precision of individual analytes, is reported in the Process Description.
Field sampling, laboratory analyses, and subsequent handling and processing of data followed strict protocols and were consistent for each Process Step outlined below.
In order to avoid the use of special characters, no subscripts or superscripts are used in the metadata. e.g., NO3- is actually NO subscript 3 superscript - and represents nitrate.
Completeness_Report:
Note that blank cells in the attached data files indicate either the attribute does not pertain to the sample or the attribute was not measured for the sample. The explanation for the presence of blank cells for this entire dataset is therefore captured in the above description and is not stated for individual Attribute Definitions in addition.
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
Sampling locations from the tidal creeks, marsh platform ponds, and porewater multiple depth profiles were measured with a handheld Garmin GPSMAP 76Cx using the WGS84 datum to an accuracy of 3 meters or less. Horizontal distance between porewater profiles along the cross-marsh transect was measured with a meter tape to an accuracy of 2 meters.
Vertical_Positional_Accuracy:
Vertical_Positional_Accuracy_Report:
Vertical position (depth of well screen below sediment surface) was measured by subtracting the exposed length of the push-point porewater sampling device from the total length to an accuracy of 2 centimeters or less. Vertical positional accuracy relative to the North American Vertical Datum of 1988 (NAVD 88) is estimated at 5 centimeters.
Lineage:
Process_Step:
Process_Description:
Surface water sampling at Sage Lot Pond:
Surface water samples were collected from the mouth of a tidal creek (2012-2016) and marsh platform ponds (2016) at Sage Lot Pond for analysis of a suite of dissolved constituents and field water quality parameters. Much of the creek mouth sampling occurred over full-tidal cycle timeseries events at different points in the spring/neap cycle and season. The water intake manifold, which was deployed into the creek prior the start of each timeseries, consisted of a ~30 cm length of 13 cm diameter slotted polyvinylchloride pipe sheathed in a plastic mesh filter (~2mm mesh size) secured to a weighted crate. The inlet rested ~30 cm above creek bottom and was connected to a 12 volt 3 gallon per minute diaphragm pump with a length of polyvinylchloride tubing. During tidal timeseries, sample water was pumped to a nearby sampling station through 1 cm inner diameter rigid plastic Cole Parmer Bev-A-Line tubing. The sampling station was located adjacent to the creek mouth (2012 through 6/13/2013) or landward near the marsh/upland edge (7/10/2013 through 2016). The transit time of water to the sampling station, calculated based on measured volumetric flow rate, tubing length and inner diameter, was ~3 min for 2013-2016 and negligible for 2012. Discrete bottle samples were collected every 0.5 to 2 hours at the sampling site during the timeseries. The specifics of sample collection, preservation and analysis of the individual analytes are described below in separate process steps. In 2014-2016, field water quality parameters (temperature, specific conductance, salinity, pH and oxidation/reduction potential) were measured with a calibrated YSI ProPlus multiparameter sonde in a flow through cell. Details of instrument specifications including precision of individual parameters can be found at: https://www.ysi.com/proplus. The date and times (Coordinated Universal Time, UTC) corresponding to sampling mid-point for each set of samples and water quality parameters are reported in SurfaceWater_GeochemicalData_SageLotPond.csv. Sampling duration at each time point was, on average, ~15 minutes.
Additional discrete surface water sample sets and field water quality parameters were collected or measured outside of the full-tidal timeseries events in the tidal creek (2014-2016) and in marsh platform ponds (2016). In these cases, samples were collected with a weighted tygon tube (deployed at a height of ~30 cm above creek or pond bottom) and peristaltic pump and subsampled into individual vials. A short length of Cole-Parmer C-Flex silicone pump tubing was used with the peristaltic pump. The specifics of sample collection, preservation and analysis of the individual analytes are described below in separate process steps. Field water quality parameters (temperature, specific conductance, salinity, pH and oxidation/reduction potential) were measured with a calibrated YSI ProPlus multiparameter sonde in a flow through cell. Subsampling occurred adjacent to the creek mouth and ponds, therefore water transit time was negligible. The date and time (Coordinated Universal Time, UTC) corresponding to sampling mid-point for each set of samples and water quality parameters is reported in SurfaceWater_GeochemicalData_SageLotPond.csv. Sampling duration was, on average, ~10 -15 minutes. Five samples collected from marsh platform ponds in 2016 are identified as such with an additional descriptor appended to the sample ID, e.g. 'SLP2016-59-Pond'.
Much of the tidal creek data reported was concurrent with additional field water quality parameters, volumetric water discharge, and carbonate chemistry data published in Mann and others (2019), and Wang and others (2019, 2020).
This process took place over a range of time from 2012 to 2016. The process date below represents the most recent date.
The contact person is listed below for this process step and is the same for all subsequent process steps.
References cited:
Mann, A.G., O'Keefe Suttles, J.A., Gonneea, M.E., Brosnahan, S.M., Brooks, T.W., Wang, Z.A., Ganju, N.K., and Kroeger, K.D., 2019, Time-series of biogeochemical and flow data from a tidal salt-marsh creek, Sage Lot Pond, Waquoit Bay, Massachusetts (2012-2016): U.S. Geological Survey data release, https://doi.org/10.5066/P9STIROQ.
Wang, Z., Kroeger, K., Gonneea, M., 2019, Discrete bottle sample measurements for carbonate chemistry from samples collected in the Sage Lot Pond salt marsh tidal creek in Waquoit Bay, MA from 2012 to 2015: Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 1) Version Date 2019-05-23, https://doi.org/10.1575/1912/bco-dmo.768577.1.
Wang, Z., Song, S., Gonneea, M., Kroeger, K., 2020, Discrete bottle sample measurements for carbonate chemistry, organic alkalinity and organic carbon from samples collected in Waquoit Bay and Vineyard Sound, MA in 2016: Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 1) Version Date 2020-02-25, https://doi.org/10.1575/1912/bco-dmo.794163.1.
Process_Date: 2016
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological Survey
Contact_Person: Thomas W. Brooks
Contact_Position: Physical Scientist
Contact_Address:
Address_Type: mailing and physical
Address: 384 Woods Hole Rd.
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
Country: USA
Contact_Voice_Telephone: 508-548-8700 x2359
Contact_Electronic_Mail_Address: wallybrooks@usgs.gov
Process_Step:
Process_Description:
Porewater sampling:
Porewater samples were collected at multiple depths (9-245 centimeters below sediment surface) in profiles along transects extending across the marsh platform at Sage Lot Pond (2014-2019) and Great Pond (2014). Horizontal distance between the marsh/ upland edge depth profile and each subsequent profile along the transect was measured with a meter tape to an accuracy of ~2 meters. Additionally, location was measured with a handheld Garmin GPSMAP 76Cx using the WGS84 datum to an accuracy of 3 meters or less. In many cases porewater sample collections at Sage Lot Pond were concurrent with full-tidal timeseries surface water sampling at the creek mouth. Note that datapoints with Sample_ID including GW correspond to samples collected landward of the marsh/upland edge in a forested upland location.
Samples were collected with 0.6 cm inner diameter, 4 cm long screened interval stainless steel push-point sampling devices (https://www.mheproducts.com/). Samples were either collected into acid-cleaned 60 mL syringes through tygon tubing or with a peristaltic pump through a short length of Cole-Parmer C-Flex silicone pump tubing. Sampling depth is reported as the depth of the midpoint of the well screen below the sediment surface. Depth relative to the North American Vertical Datum of 1988 (NAVD 88) was calculated as the elevation of NAVD 88 at the surface minus the depth of the well screen below the surface. For samples collected during 2014-2016, field water quality parameters (temperature, specific conductance, salinity, dissolved oxygen, pH, oxidation/reduction potential) were measured with a calibrated YSI ProPlus multiparameter sonde in a flow-through cell. Details of instrument specifications including precision of individual parameters can be found at: https://www.ysi.com/proplus. For samples collected during 2018-2019, Salinity and pH were measured with a handheld refractometer and a calibrated Cole-Parmer P200 pH meter. Porewater was then subsampled into individual vials in the field for geochemical analysis of a suite of dissolved constituents. The specifics of sample collection, preservation and analysis of the individual analytes are described below in subsequent process steps.
This process took place over a range of time from 2014 to 2019. The process date below represents the most recent date.
Process_Date: 2019
Process_Step:
Process_Description:
Suspended particulate matter in surface water:
Surface water samples for analysis of suspended particulate matter were collected with a Van Dorn grab sampler or a peristaltic pump from the tidal creek (2012-2016) and marsh platform ponds (2016) at the Sage Lot Pond field site. Samples were collected ~30 cm above creek or pond bottom and transferred into 500 mL polyethylene bottles and stored at ~4 degrees Celsius until analysis. Samples were analyzed at the USGS in Woods Hole, MA for suspended sediment concentration (SSC) within 7 days of collection following the method described in APHA (2005). Samples were filtered through glass fiber filters, either 1.2 micron pore size (2012-2014), or 0.7 micron pore size (2015-2016). Average coefficient of variation in SSC among 10 pairs of field duplicate samples from the tidal creek, representing analytical precision plus environmental variability, was 9 percent. Additionally, three pairs of field duplicate samples were collected with the Van Dorn sampler and the peristaltic pump and analyzed for difference in means with a paired t-test. No significant difference in SSC was detected for the different sampling methods (NS, df=2).
A subset of the samples collected in 2012, 2013, and 2016 were HCl-treated in a fuming acid desiccator for ~5 hours to remove inorganic carbon and analyzed at the Marine Bological Laboratory (MBL) Stable Isotope Laboratory in Woods Hole, MA using a Europa 20-20 continuous-flow isotope ratio mass spectrometer interfaced with a Europa ANCA-SL elemental analyzer for total organic Carbon (C), total Nitrogen (N), d13C, and d15N. Isotopic C and N results are expressed relative to Vienna Peedee Belemnite (VPDB), and air, respectively. The analytical precision based on replicate analyses of isotopically homogeneous international standards is ~0.1 per mil for d13C, and d15N. Coefficient of variation is ~2 percent for total C and N. Particulate organic carbon (POC) and total particulate nitrogen (TPN) concentrations were calculated by dividing lab-reported total C and N by the water sample volume. No formal tests were conducted on the influence of filter pore size on SSC or particulate C or N. Five samples collected from marsh platform ponds in 2016 are identified as such with an additional descriptor appended to the sample ID, e.g. 'SLP2016-59-Pond'.
This process took place over a range of time from 2012 to 2016. The process date below represents the most recent date.
Reference cited:
APHA, 2005, Standard methods for the examination of water and waste water, 21st edn., American Public Health Association, Washington, DC, https://doi.org/10.2105/SMWW.2882.001.
Process_Date: 2016
Process_Step:
Process_Description:
Concentrations and stable isotopic ratios of dissolved organic carbon in porewater and surface water:
Samples for dissolved organic carbon (DOC) concentration, and delta 13C of DOC (d13C-DOC) were filtered through sample-rinsed 0.45 micron pore size polyethersulfone filters (2012-2014) or a PALL AcroPak 200 Capsule Filter (sterile 0.8/0.2 micron Supor hydrophilic polyethersulfone membrane; part number 12941) (2015-2016) into combusted borosilicate glass vials with acid-cleaned teflon-lined septa caps. Vials were pretreated with 20 percent hydrochloric acid (12 microliters per milliliter of sample) to decrease the pH of the sample to 2 or less, and samples were stored at 4 degrees Celsius until analysis. Samples were analyzed for DOC on an O.I. Analytical Aurora 1030C auto-analyzer by high temperature catalytic oxidation and nondispersive infrared detection (HTCO-NDIR). Concentrations are reported relative to potassium hydrogen phthalate (KHP) calibration standard.
A subset of the surface water and porewater samples were analyzed for d13C-DOC using a Thermo-Finnigan DELTAplus XL Isotope Ratio Mass Spectrometer interfaced to the Aurora 1030C following the method of Lalonde and others (2014). Stable carbon isotope ratios are reported in standard delta (d) notation relative to Vienna Pee Dee Belemnite (VPDB). Quality assurance included replicate analysis of natural reference materials, field samples and calibration standards. In a subset of the porewater samples, a solid white or brown precipitate formed in the sample vial during storage, or in many cases immediately after collection. Porewater samples were vigorously shaken in an attempt to re-dissolve the material, and needle depth on the 1030C auto-analyzer was set to an appropriate depth to avoid sampling precipitated solids. Analytical uncertainties in concentration and d13C were determined separately for creek and porewater based on replicate measurement of field samples from a single vial. Coefficient of variation in DOC concentration and d13C were 5 percent or less, and 2 percent or less for both creek and porewater respectively. No formal tests were conducted on the influence of precipitated solids in porewater samples on accuracy of DOC or d13C.
This process took place over a range of time from 2012 to 2019. The process date below represents the most recent date.
Reference cited:
Lalonde, K., Middlestead, P. and Gelinas, Y., 2014, Automation of 13C/12C ratio measurement for freshwater and seawater DOC using high temperature combustion: Limnology and Oceanography: Methods, 12(12), pp.816-829, https://doi.org/10.4319/lom.2014.12.816.
Process_Date: 2019
Process_Step:
Process_Description:
Stable isotopic ratio of dissolved inorganic carbon in porewater and surface water:
Samples for delta 13C of dissolved inorganic carbon (d13C-DIC) were collected from the tidal creek and from porewater profiles, unfiltered, and submitted to the University of California Stable Isotope Facility in Davis, CA (UC Davis SIF) for analysis. Samples were collected in 2012 and 2013 into pre-combusted borosilicate glass vials with teflon-lined butyl rubber septa screw caps. Vials were filled from the bottom, overflowed with >3 void volumes, capped immediately without headspace, and stored at 4 degrees Celsius until analysis. All subsequent samples (2014-2016) were collected into 12 mL glass exetainers with pierceable chlorobutyl septa-lined screw caps (Labco, High Wycombe, UK). Exetainers were prepared in the laboratory by adding 1 mL of 85 percent phosphoric acid; vials were capped, evacuated, then flushed with helium. Using a needle and syringe, unfiltered sample, either 2 or 3 mL for porewater or surface water, respectively, was added to the exetainer.
Samples were analyzed on a GasBench II system interfaced to a Delta V Plus isotope ratio mass spectrometer at the UC Davis SIF (https://stableisotopefacility.ucdavis.edu/dictracegas.html). Stable isotopic ratios are reported in standard delta notation relative to Vienna Pee Dee Belemnite (VPDB). Quality assurance included replicate analysis of natural reference materials and field samples. Reported long-term standard deviation in d13C and Limit of Quantification in DIC as CO2 are 150 nanomoles, and 0.1 per mil.
This process took place over a range of time from 2012 to 2016. The process date below represents the most recent date.
Process_Date: 2016
Process_Step:
Process_Description:
Dissolved methane and nitrous oxide gas in porewater and surface water:
Surface water samples from the tidal creek at Sage Lot Pond were collected during 2012 and 2013 for analysis of dissolved methane (CH4) and nitrous oxide (N2O) gas. Samples were collected, unfiltered, into 60 mL syringes fitted with a two-way stopcock free of headspace. After collection, 30 milliliters of high-purity Zero Air was drawn into the syringe, and the sample was manually shaken for 2 min to equilibrate dissolved gas concentrations in the liquid sample with that of the introduced headspace. Once the sample was equilibrated, the liquid sample was expelled from the syringe and the headspace gas was stored at 4 degrees Celsius until analysis, which was within 4 days of collection.
Porewater samples were collected in 2014 and 2015 into pre-evacuated 30 mL borosilicate glass serum bottles with butyl rubber stoppers and crimp caps for CH4 analysis. Bottles were pretreated with 100 microliters 8 Molar (M) KOH solution (7 microliters per milliliter of sample) prior to evacuation to increase the pH of the sample to 12 or greater (Magen and others, 2014). Using a needle and syringe, 15 mL of headspace-free unfiltered sample was added to the bottle through the rubber stopper in the field. Upon return to the lab, a known volume of high purity Zero Air was added to the bottles with a syringe and needle through the stopper to bring the bottles to atmospheric pressure at room temperature (~25 deg. Celsius). Samples were manually equilibrated for 2 min and stored at room temperature until analysis.
Headspace CH4 and N2O concentrations in creek samples were measured on a Shimadzu GC-2014 gas chromatograph equipped with a flame ionization detector (FID) and electron capture detector (ECD). Headspace CH4 concentration in porewater samples was measured on a Shimadzu GC-14B gas chromatograph equipped with an FID. Coefficient of variation based on replicate measurements of a single sample were 2 percent or less for both instruments. Solubility coefficients and dissolved concentrations for CH4 and N2O were calculated based on temperature and salinity at time of equilibration, sample to headspace volume ratio and GC-measured headspace concentrations (Wiesenburg and Guinasso, 1979; Weiss and Price, 1980).
This process took place over a range of time from 2012 to 2015. The process date below represents the most recent date.
References cited:
Magen, C., Lapham, L.L., Pohlman, J.W., Marshall, K., Bosman, S., Casso, M. and Chanton, J.P., 2014, A simple headspace equilibration method for measuring dissolved methane: Limnology and Oceanography: Methods, 12(9), pp.637-650, https://doi.org/10.4319/lom.2014.12.637.
Wiesenburg, D.A. and Guinasso Jr, N.L., 1979, Equilibrium solubilities of methane, carbon monoxide, and hydrogen in water and sea water: Journal of Chemical and Engineering Data, 24(4), pp.356-360.
Weiss, R.F. and Price, B.A., 1980, Nitrous oxide solubility in water and seawater: Marine Chemistry, 8(4), pp.347-359.
Process_Date: 2015
Process_Step:
Process_Description:
Nutrients in porewater and surface water:
Samples for analysis of nutrients nitrate, ammonium, phosphate, and total silica were filtered through a sample-rinsed 0.45 micron pore size polyethersulfone filters (2012-2014) or a PALL AcroPak 200 Capsule Filter (sterile 0.8/0.2 micron Supor hydrophilic polyethersulfone membrane; part number 12941) (2015-2016) into a sample-rinsed, acid-cleaned polyethylene vials. Samples for nitrate, ammonium, and phosphate were kept on ice in the field and then stored frozen until analysis. Samples for total silica were stored at 4 degrees Celsius until analysis.
Nitrate and ammonium were measured on a Unity Scientific SmartChem 200 autoanalyzer (2012-2013), or a Lachat Instruments QuickChem 8000 injection analyzer (2014-2016) using standard colorimetric techniques according to APHA (2005), method 4500-NH3-G, and method 4500-NO3-F. Nitrate (NO3-) and nitrite (NO2-) were not quantified separately and their sum is referred to as nitrate (NO3-) in this report. Phosphate was measured on a Lachat Instruments QuickChem 8000 following method 4500-P-F (APHA, 2005). Detection limit was 0.05 uM, and coefficient of variation was 5 percent or less for nitrate, ammonium, and phosphate.
Silicate was measured on a Lachat autoanalyzer (QuikChem Method 31-114-27-1-A) by the molybdenum blue colorimetric method at the Marine Biological Laboratory. We used sodium hexafluorosilicate (Na2SiF6) as the Si standard (Strickland and Parsons, 1968), and external standards (Hach) were always within 5 percent accuracy.
This process took place over a range of time from 2012 to 2016. The process date below represents the most recent date.
References cited:
APHA, 2005, Standard methods for the examination of water and waste water, 21st edn., American Public Health Association, Washington, DC, https://doi.org/10.2105/SMWW.2882.001.
Strickland, J. D. H., and R. T. Parson, 1972, A practical guide to seawater analysis: Bull. Fish. Res. Board Can 167, p. 95-98.
Process_Date: 2016
Process_Step:
Process_Description:
Total dissolved nitrogen in surface water:
Samples for total dissolved nitrogen (TDN) were filtered through a sample-rinsed 0.45 micron pore size polyethersulfone filter (2012-2014) or a PALL AcroPak 200 Capsule Filter (sterile 0.8/0.2 micron Supor hydrophilic polyethersulfone membrane; part number 12941) (2015-2016) into pre-combusted borosilicate glass vials with acid-cleaned teflon-lined septa caps. Vials were pretreated with 20% hydrochloric acid (12 microliters per milliliter of sample) to decrease the pH of the sample to 2 or less, and samples were stored at 4 degrees Celsius until analysis.
Samples were analyzed on an O.I. Analytical Aurora 1030C autoanalyzer by high temperature catalytic oxidation and chemiluminescence detection. Concentrations are reported relative to nicotinic acid calibration standards. Quality assurance included replicate analysis of natural reference materials, field samples and calibration standards. Coefficient of variation is 5 percent or less.
This process took place over a range of time from 2012 to 2016. The process date below represents the most recent date.
Process_Date: 2016
Process_Step:
Process_Description:
Dissolved inorganic carbon in porewater and surface water:
Samples for analysis of dissolved inorganic carbon (DIC) were collected into unevacuated 6 mL glass serum vials with butyl rubber septa and crimp caps. New vials were triple rinsed with distilled water and pre-combusted at 500 degrees Celsius, pre-used vials were HCl-cleaned and oven-dried. Using a needle and syringe, 3 mL of unfiltered sample water was added to the vial. Samples were stored on ice in the field and stored frozen until analysis.
DIC concentrations were determined with a Model 5015 UIC coulometer and quantified relative to a sea water certified reference material (https://www.ncei.noaa.gov/access/ocean-carbon-data-system/oceans/Dickson_CRM/batches.html). Samples were acidified with 20 percent phosphoric acid and purged with Ultra-high purity nitrogen, and the evolved carbon dioxide gas was delivered to the detector and quantified. Coefficient of variation was 4 percent.
This process took place over a range of time from 2014 to 2019. The process date below represents the most recent date.
Process_Date: 2019
Process_Step:
Process_Description:
Total alkalinity in porewater and surface water:
Samples for total alkalinity were collected into acid-cleaned 60 mL HDPE plastic syringes with a two-way stopcock unfiltered without headspace and stored at 4 degrees Celsius until analysis. Samples were analyzed on a Hiranuma Sangyo Aquacounter COM-300A Automatic Titrator following standard protocols within 7 days of collection. Quality assurance included replicate analysis of natural reference materials and field samples. Results were within the acceptable range of precision and accuracy. Coefficient of variation = 2 percent.
This process took place over a range of time from 2014 to 2016. The process date below represents the most recent date.
Process_Date: 2016
Process_Step:
Process_Description:
Radium (Ra)isotopes in porewater and surface water:
Samples for Ra isotopes were collected in large plastic barrels (60 L) for surface water and cubitainers (2.0 to 23.1 L) for porewater. Surface water samples were then filtered through manganese oxide (MnO2) impregnated acrylic fibers (hereafter referred to as Mn fibers) at a flow rate of 0.2-0.8 L per minute to quantitatively sorb Ra onto the MnO2 (Moore and Reid, 1973). 100ml of bleach was added to porewater samples to oxidize the sulfide, which strips Mn from the Mn fibers. After 20 minutes of reaction, porewater was gravity filtered through Mn fibers at a flow rate of less than 0.5 L per minute.
Mn fibers were brought to the lab and rinsed with Ra-free water to remove salts, which interfere with counting (Sun and Torgersen, 1998), partially dried and placed in a delayed coincidence counter (RaDECC) to measure 223Ra and 224Ra 1-3 days after collection (Moore and Arnold, 1996). Additional counts were done at 11 to 17 days post sampling to improve 223Ra measurements and four weeks to correct for supported 224Ra. Mn fibers were combusted at 820 degrees Celsius for 16 hours, homogenized and capped with epoxy, prior to being placed within a well-type gamma spectrometer to measure 228Ra (via 228Ac at 911 keV) and 226Ra (via 214Pb at 351.9 keV) (Charette and others, 2001). All detectors were standardized using a 226Ra NIST-certified Standard Reference Material (#4967A) and a gravimetrically prepared ThNO3 powder, with thorium daughters (228Ra) in equilibrium, which was dissolved and calibrated via isotope dilution MC-ICP-MS with the 226Ra NIST standard. These solutions were sorbed to Mn fibers and prepared in the same manner as the samples. 223Ra, 224Ra and 228Ra activities were decay corrected to the time of collection. Signal to noise ratio for each sample was calculated for 226Ra and 228Ra in the APTEC software during analysis. Typical detection limit of 226Ra and 228Ra were 0.2 (porewater and groundwater) and 5 (surface water) dpm/100L. Coefficient of variation was 2 and 3 percent for 226Ra and 228Ra, respectively. Analysis of 223 and 224Ra via the RaDECC system results in uncertainties of 10 and 5 percent respectively, at the volumes and activities measured in these samples (Garcia-Solsona and others, 2008.
This process took place over a range of time from 2014 to 2019. The process date below represents the most recent date.
References cited:
Charette, M.A., Buesseler, K.O. and Andrews, J.E., 2001, Utility of radium isotopes for evaluating the input and transport of groundwater-derived nitrogen to a Cape Cod estuary: Limnology and Oceanography, 46(2): p. 465-470.
Garcia-Solsona, E., Garcia-Orellana, J., Masque, P., and Dulaiova, H., 2008, Uncertainties associated with 223Ra and 224Ra measurements in water via a Delayed Coincidence Counter (RaDeCC): Marine Chemistry 109, p. 198–219, https://doi.org/10.1016/j.marchem.2007.11.006.
Moore, W.S. and Reid, D.F., 1973, Extraction of Radium from Natural Waters Using Manganese-Impregnated Acrylic Fibers: Journal of Geophysical Research, 78(36): p. 8880-8886.
Moore, W.S. and Arnold, R., 1996, Measurement of Ra-223 and Ra-224 in coastal waters using a delayed coincidence counter: Journal of Geophysical Research-Oceans, 101(C1): p. 1321-1329.
Sun, Y., and T. Torgersen, 1998, Rapid and precise measurement method for adsorbed 224Ra on sediments: Marine Chemistry, v. 61, p. 163-171.
Process_Date: 2019
Process_Step:
Process_Description:
Trace elements in porewater and surface water:
Samples for trace elements analysis were filtered through a sample-rinsed PALL AcroPak 200 Capsule Filter (sterile 0.8/0.2 micron Supor hydrophilic polyethersulfone membrane; part number 12941) into acid cleaned polyethylene vials, spiked with 8 normal (N) Optima nitric acid to a pH of less than 2, and stored at room temperature until analysis.
Samples were diluted 20-fold with 5% Optima nitric acid and analyzed on a Thermo Fisher iCAP Qc at the Woods Hole Oceanographic Institution (WHOI) in Woods Hole, MA for manganese (Mn), iron (Fe), copper (Cu), strontium (Sr), barium (Ba), and uranium (U). Count rates were normalized to an internal indium (In) standard to account for drift and matrix interference of the solution. Water sample density was calculated based on field salinity and a typical lab temperature of 25 deg. Celsius following the method of Fofonoff and Millard (1983). Molar concentration was calculated as the product of lab-measured molal concentration and density. Quality assurance included replicate analysis of natural reference materials and field samples. Detection limits were determined as 3 times the standard deviation of the analytical blank. LOD = 0.01 uM for Mn, Fe, and Sr; and 0.01 nM 0.01 nM for Cu, Ba, and U. Coefficient of variation = 1, 12, 11, 5, 0.3, and 7 percent for Mn, Fe, Cu, Sr, Ba, and U, respectively.
Germanium (Ge) was measured by Inductively-Coupled Plasma Mass Spectrometry (ICP-MS) at Boston University, Boston, MA using methods adapted from Wada and others, 1979 and Kurtz and others, 2002. To prepare samples for analysis, we combined 5g of porewater or groundwater sample with 1g of 5.43 pmol/g Ge spike and acidified samples using concentrated nitric acid. Spiked and unspiked blanks (deionized water) and standards (laboratory-prepared samples of known Ge concentration) were interspersed throughout the unknown samples so that instrument error could be incorporated mathematically during analysis.
This process took place over a range of time from 2014 to 2016. The process date below represents the most recent date.
References cited:
Fofonoff, N.P., and R.C. Millard, 1983. Algorithms for computation of fundamental properties of seawater. UNESCO Technical Papers is Marine Science. No. 44. pp. 53.
Kurtz, A.C., Derry, L.A. and Chadwick, O.A., 2002. Germanium-silicon fractionation in the weathering environment. Geochimica et Cosmochimica Acta, 66(9), pp.1525-1537.
Wada, K., Takaoka, H., Inoue, N. and Kohra, K., 1979. Growth of Stacking Faults by Bardeen-Herring Mechanism in Czochralski Silicon. Japanese Journal of Applied Physics, 18(8), p.1629.
Process_Date: 2016
Process_Step:
Process_Description:
Autosal Salinity in porewater and surface water:
Samples for salinity analysis were collected unfiltered in 125 mL borosilicate glass bottles and measured with a Guideline Instruments Autosal Salinometer at the WHOI CTD Calibration Laboratory and referenced against NIST standards to a precision of 0.0001 practical salinity units (PSU, dimensionless).
This process took place over a range of time from 2014 to 2016. The process date below represents the most recent date.
Process_Date: 2016
Process_Step:
Process_Description:
Sulfide in porewater:
Sulfide sample vials were prepared in the laboratory prior to sample collection by adding 25 microliters of saturated zinc-acetate solution to a 12-milliliter glass exetainer with pierceable chlorobutyl septa-lined screw cap. The exetainer was evacuated after adding the zinc-acetate preservative. Using a needle and syringe, 8 milliliters of unfiltered sample water was added to the exetainer. Samples were stored at 4 degrees Celsius until analyzed.
Sulfide samples were analyzed spectrophotometrically following the methylene blue method (Cline, 1969; Reese and others, 2011) using a Thermo Scientific GENESYS 20 spectrophotometer (1 cm cell, 670 nanometer wavelength). The detection limit was determined as 2 times the concentration of the reagent blank (Reese et al. 2011) or LOD =1 uM. Quality assurance included replicate analysis of prepared standards and field samples. Average coefficient of variation of replicates for this sample set was less than 1 percent.
This process took place over a range of time from 2015 to 2016. The process date below represents the most recent date.
References cited:
Cline, J.D., 1969, Spectrophotometric determination of hydrogen sulfide in natural waters: Limnology and Oceanography, v. 14, p. 454-458.
Reese, B.K., Finneran, D.W., Mills, H.J., Zhu, M.X., and Morse, J.W., 2011, Examination and refinement of the determination of aqueous hydrogen sulfide by the methylene blue method: Aquatic Geochemistry, v. 17, p. 567-582.
Process_Date: 2016
Process_Step:
Process_Description: Fixed author middle initial.
Process_Date: 20210514
Process_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological Survey
Contact_Person: VeeAnn A. Cross
Contact_Position: Marine Geologist
Contact_Address:
Address_Type: Mailing and Physical
Address: 384 Woods Hole Road
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
Contact_Voice_Telephone: 508-548-8700 x2251
Contact_Facsimile_Telephone: 508-457-2310
Contact_Electronic_Mail_Address: vatnipp@usgs.gov
Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Point
Point_and_Vector_Object_Information:
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: Point
Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Geographic:
Latitude_Resolution: 0.00001
Longitude_Resolution: 0.00001
Geographic_Coordinate_Units: decimal degrees
Geodetic_Model:
Horizontal_Datum_Name: World Geodetic System 1984
Ellipsoid_Name: WGS 84
Semi-major_Axis: 6378137.000000
Denominator_of_Flattening_Ratio: 298.257
Vertical_Coordinate_System_Definition:
Altitude_System_Definition:
Altitude_Datum_Name: North American Vertical Datum of 1988 (NAVD 88)
Altitude_Resolution: 0.02
Altitude_Distance_Units: meters
Altitude_Encoding_Method: Attribute values
Depth_System_Definition:
Depth_Datum_Name: Sediment surface
Depth_Resolution: 0.01
Depth_Distance_Units: meters
Depth_Encoding_Method: Attribute values
Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label: Porewater_GeochemicalData_SageLotPond_GreatPond
Entity_Type_Definition:
Porewater geochemical and field data collected from depth profiles in cross-marsh transects at Sage Lot Pond and Great Pond, 2014-2019. This csv file contains 307 records.
Entity_Type_Definition_Source: Producer defined.
Attribute:
Attribute_Label: Site_ID
Attribute_Definition:
Identifier of sample collection location denoting either Sage Lot Pond or Great Pond
Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:
Unrepresentable_Domain: Character set.
Attribute:
Attribute_Label: Sample_ID
Attribute_Definition:
Unique sample identifier for the water sample assigned in the field. Note that datapoints with Sample_ID including GW correspond to samples collected landward of the marsh/upland edge in a forested upland location at Sage Lot Pond, and Sample_ID prepended by GP correspond to samples collected from the Great Pond field site
Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:
Unrepresentable_Domain: Character set.
Attribute:
Attribute_Label: Date_UTC
Attribute_Definition:
Date in Coordinated Universal Time (UTC) at which the porewater sample was collected in the format mm/dd/yyyy, month/day/year
Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 08/12/2014
Range_Domain_Maximum: 11/07/2019
Attribute_Units_of_Measure: month/day/year
Attribute:
Attribute_Label: DateTime_UTC
Attribute_Definition:
Date and time in 24 hour Coordinated Universal Time (UTC) at which the water sample was collected in the format m/d/yyyy h:mm, month/day/year hour:minutes
Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 8/12/2014 14:26
Range_Domain_Maximum: 4/3/2018 13:25
Attribute_Units_of_Measure: month/day/year and time
Attribute:
Attribute_Label: TransectDistance_m
Attribute_Definition:
Horizontal distance between the upland end of the transect (high marsh profile) and subsequent profiles going towards the marsh-sea edge along the cross-marsh transect. For additional details on location, refer to Latitude and Longitude attributes
Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0
Range_Domain_Maximum: 125
Attribute_Units_of_Measure: meters
Attribute:
Attribute_Label: SamplingDepth_cm
Attribute_Definition:
Depth below the sediment surface at which the porewater sample was collected
Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 1
Range_Domain_Maximum: 245
Attribute_Units_of_Measure: centimeters below sediment surface
Attribute:
Attribute_Label: Elevation_NAVD88_m
Attribute_Definition:
Elevation at which the porewater sample was collected, reported relative to the North American Vertical Datum of 1988 (NAVD 88)
Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: -2.31
Range_Domain_Maximum: 0.22
Attribute_Units_of_Measure: meters
Attribute:
Attribute_Label: Latitude_WGS84
Attribute_Definition:
Latitude in decimal degrees north, measured using the WGS84 datum
Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 41.55255
Range_Domain_Maximum: 41.55680
Attribute_Units_of_Measure: decimal degrees
Attribute:
Attribute_Label: Longitude_WGS84
Attribute_Definition:
Longitude in decimal degrees west, measured using the WGS84 datum. A negative value indicates the western hemisphere
Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: -70.58060
Range_Domain_Maximum: -70.50541
Attribute_Units_of_Measure: decimal degrees
Attribute:
Attribute_Label: Temperature_C
Attribute_Definition: Temperature of the water sample at the time of collection
Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 6.0
Range_Domain_Maximum: 28.2
Attribute_Units_of_Measure: degrees Celsius
Attribute:
Attribute_Label: SpecificConductance_mSpercm
Attribute_Definition:
A measure of the ability of the water sample to conduct electricity at the standard temperature of 25 degrees Celsius
Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.42
Range_Domain_Maximum: 51.30
Attribute_Units_of_Measure: milliseimens per centimeter
Attribute:
Attribute_Label: Salinity_PSU
Attribute_Definition:
Salinity of the water sample measured in practical salinity units (PSU, dimensionless)
Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.20
Range_Domain_Maximum: 35.00
Attribute_Units_of_Measure: practical salinity units (dimensionless)
Attribute:
Attribute_Label: DO_percentsaturation
Attribute_Definition: Dissolved oxygen (DO) saturation of the water sample
Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.0
Range_Domain_Maximum: 71.6
Attribute_Units_of_Measure: percent saturation
Attribute:
Attribute_Label: DO_mgperL
Attribute_Definition: Dissolved oxygen (DO) concentration of the water sample
Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.00
Range_Domain_Maximum: 5.96
Attribute_Units_of_Measure: millgrams per liter
Attribute:
Attribute_Label: pH
Attribute_Definition:
Negative logarithm of hydronium ion activity [H+] of the water sample
Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 4.53
Range_Domain_Maximum: 7.24
Attribute_Units_of_Measure: unitless
Attribute:
Attribute_Label: ORP_mV
Attribute_Definition: Oxidation/Reduction potential (ORP) of the water sample
Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: -500
Range_Domain_Maximum: 301
Attribute_Units_of_Measure: millivolts
Attribute:
Attribute_Label: Salinity_AutoSal_PSU
Attribute_Definition:
High precision salinity of the water sample in practical salinity units (PSU, dimensionless). Measured on discrete bottle samples with a salinometer to a precision of 0.0001 PSU
Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.2646
Range_Domain_Maximum: 33.8202
Attribute_Units_of_Measure: practical salinity units (dimensionless)
Attribute:
Attribute_Label: Nitrate_umolperL
Attribute_Definition:
Concentration of dissolved nitrate plus nitrite (NO3- + NO2-) of the water sample. Note that the analytical limit of detection is equal to 0.05 micromoles per liter (LOD = 0.05 uM) and values below the LOD are truly an unknown value between zero and the LOD
Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.6
Range_Domain_Maximum: 2.3
Attribute_Units_of_Measure: micromoles per liter
Attribute:
Attribute_Label: Ammonium_umolperL
Attribute_Definition:
Dissolved ammonium (NH4+) concentration of the water sample. Note that the analytical limit of detection is equal to 0.05 micromoles per liter (LOD = 0.05 uM) and values below the LOD are truly an unknown value between zero and the LOD
Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 4.0
Range_Domain_Maximum: 149.3
Attribute_Units_of_Measure: micromoles per liter
Attribute:
Attribute_Label: Phosphate_umolperL
Attribute_Definition:
Dissolved phosphate (PO43-) concentration of the water sample. Note that the analytical limit of detection is equal to 0.05 micromoles per liter (LOD = 0.05 uM) and values below the LOD are truly an unknown value between zero and the LOD
Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.4
Range_Domain_Maximum: 9.3
Attribute_Units_of_Measure: micromoles per liter
Attribute:
Attribute_Label: Silica_umolperL
Attribute_Definition: Dissolved total silica (Si) concentration in the water sample
Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 24.0
Range_Domain_Maximum: 341.2
Attribute_Units_of_Measure: micromoles per liter
Attribute:
Attribute_Label: Sulfide_umolperL
Attribute_Definition:
Dissolved sulfide (S2-) concentration of the water sample. Note that the analytical limit of detection is equal to 1 micromoles per liter (LOD = 1 uM) and values below the LOD are truly an unknown value between zero and the LOD
Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.0
Range_Domain_Maximum: 334.3
Attribute_Units_of_Measure: micromoles per liter
Attribute:
Attribute_Label: TDN_umolperL
Attribute_Definition:
Total dissolved nitrogen (TDN) concentration of the water sample
Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 234.3
Range_Domain_Maximum: 956.2
Attribute_Units_of_Measure: micromoles per liter
Attribute:
Attribute_Label: TotalAlkalinity_ueqperL
Attribute_Definition: Total alkalinity of the water sample
Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 451.6
Range_Domain_Maximum: 10500.4
Attribute_Units_of_Measure: microequivalents per liter
Attribute:
Attribute_Label: DIC_umolperL
Attribute_Definition:
Dissolved inorganic carbon (DIC) concentration of the water sample
Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 1058.0
Range_Domain_Maximum: 24175.7
Attribute_Units_of_Measure: micromoles per liter
Attribute:
Attribute_Label: DIC_d13C_VPDB_permil
Attribute_Definition:
Delta (d) 13C of dissolved inorganic carbon (DIC) in the water sample, a measure of the stable isotopic ratio of 13C : 12C expressed relative to Vienna Pee Dee Belemnite (VPDB)
Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: -27.4
Range_Domain_Maximum: -4.1
Attribute_Units_of_Measure: per mil
Attribute:
Attribute_Label: DOC_umolperL
Attribute_Definition:
Dissolved organic carbon (DOC) concentration of the water sample
Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 293.9
Range_Domain_Maximum: 15857.8
Attribute_Units_of_Measure: micromoles per liter
Attribute:
Attribute_Label: DOC_d13C_VPDB_permil
Attribute_Definition:
Delta (d) 13C of dissolved organic carbon (DOC) in the water sample, a measure of the stable isotopic ratio of 13C : 12C expressed relative to Vienna Pee Dee Belemnite (VPDB)
Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: -32.2
Range_Domain_Maximum: -17.0
Attribute_Units_of_Measure: per mil
Attribute:
Attribute_Label: Methane_nmolperL
Attribute_Definition:
Concentration of dissolved methane (CH4) gas in the water sample
Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 258.5
Range_Domain_Maximum: 153771.8
Attribute_Units_of_Measure: nanomoles per liter
Attribute:
Attribute_Label: Mn_umolperL
Attribute_Definition:
Dissolved manganese (Mn) concentration of the water sample. Note that the analytical limit of detection is equal to 0.01 micromoles per liter (LOD = 0.01 uM) and values below the LOD are truly an unknown value between zero and the LOD
Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.034
Range_Domain_Maximum: 23.881
Attribute_Units_of_Measure: micromoles per liter
Attribute:
Attribute_Label: Fe_umolperL
Attribute_Definition:
Dissolved iron (Fe) concentration of the water sample. Note that the analytical limit of detection is equal to 0.01 micromoles per liter (LOD = 0.01 uM) and values below the LOD are truly an unknown value between zero and the LOD
Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0
Range_Domain_Maximum: 362.901
Attribute_Units_of_Measure: micromoles per liter
Attribute:
Attribute_Label: Cu_nmolperL
Attribute_Definition:
Dissolved copper (Cu) concentration of the water sample. Note that the analytical limit of detection is equal to 0.01 nanomoles per liter (LOD = 0.01 nM) and values below the LOD are truly an unknown value between zero and the LOD
Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0
Range_Domain_Maximum: 819.874
Attribute_Units_of_Measure: nanomoles per liter
Attribute:
Attribute_Label: Sr_umolperL
Attribute_Definition:
Dissolved strontium (Sr) concentration of the water sample. Note that the analytical limit of detection is equal to 0.01 micromoles per liter (LOD = 0.01 uM) and values below the LOD are truly an unknown value between zero and the LOD
Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.263
Range_Domain_Maximum: 104.949
Attribute_Units_of_Measure: micromoles per liter
Attribute:
Attribute_Label: Ba_nmolperL
Attribute_Definition:
Dissolved barium (Ba) concentration of the water sample. Note that the analytical limit of detection is equal to 0.01 nanomoles per liter (LOD = 0.01 nM) and values below the LOD are truly an unknown value between zero and the LOD
Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 6.334
Range_Domain_Maximum: 295.078
Attribute_Units_of_Measure: nanomoles per liter
Attribute:
Attribute_Label: U_nmolperL
Attribute_Definition:
Dissolved uranium (U) concentration of the water sample. Note that the analytical limit of detection is equal to 0.01 nanomoles per liter (LOD = 0.01 nM) and values below the LOD are truly an unknown value between zero and the LOD
Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.152
Range_Domain_Maximum: 24.941
Attribute_Units_of_Measure: nanomoles per liter
Attribute:
Attribute_Label: Ge_pcolperL
Attribute_Definition: Dissolved germanium (Ge) concentration of the water sample
Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 156.158
Range_Domain_Maximum: 1253.549
Attribute_Units_of_Measure: picomoles per liter
Attribute:
Attribute_Label: Ra223_dpm_per100L
Attribute_Definition: Activity of radium-223 (223Ra) in the water sample
Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 1.647
Range_Domain_Maximum: 691.743
Attribute_Units_of_Measure: decays per minute per 100 liters
Attribute:
Attribute_Label: Ra224_dpm_per100L
Attribute_Definition: Activity of radium-224 (224Ra) in the water sample
Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 31.421
Range_Domain_Maximum: 8094.103
Attribute_Units_of_Measure: decays per minute per 100 liters
Attribute:
Attribute_Label: Ra226_dpm_per100L
Attribute_Definition:
Activity of radium-226 (226Ra) in the water sample. Note that the analytical limit of detection (LOD) is equal to 0.2 decays per minute per 100L for porewater and groundwater and values below the LOD are truly an unknown value between zero and the LOD
Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0
Range_Domain_Maximum: 618.555
Attribute_Units_of_Measure: decays per minute per 100 liters
Attribute:
Attribute_Label: Ra228_dpm_per100L
Attribute_Definition:
Activity of radium-228 (228Ra) in the water sample. Note that the analytical limit of detection (LOD) is equal to 0.2 decays per minute per 100L for porewater and groundwater and values below the LOD are truly an unknown value between zero and the LOD
Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 9.776
Range_Domain_Maximum: 3675.944
Attribute_Units_of_Measure: decays per minute per 100 liters
Attribute:
Attribute_Label: Notes
Attribute_Definition:
Field notes, pertaining to the soil type from which the porewater sample was collected
Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:
Unrepresentable_Domain: Character set.
Detailed_Description:
Entity_Type:
Entity_Type_Label: SurfaceWater_ParticulateData_SageLotPond
Entity_Type_Definition:
Surface water particulate data collected from the tidal creek and marsh platform ponds at Sage Lot Pond, 2012-2016. This csv file contains 258 records.
Entity_Type_Definition_Source: Producer defined.
Attribute:
Attribute_Label: Sample_ID
Attribute_Definition:
Uniqe sample identifier assigned to the water sample in the field. Note that additional samples collected outsite of full-tidal timesieries sampling events are identified by the unique timestamp in the 'DateTime_UTC' attribute, and not by 'Sample_ID'. Five samples collected from marsh platform ponds in 2016 are identified as such with an additional descriptor appended to the sample ID, e.g. 'SLP2016-59-Pond'.
Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:
Unrepresentable_Domain: Character set.
Attribute:
Attribute_Label: DateTime_UTC
Attribute_Definition:
Date and time in 24 hour Coordinated Universal Time (UTC) at which the water sample was collected in the format m/d/yyyy h:mm, month/day/year hour:minutes
Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 4/9/2012 12:48
Range_Domain_Maximum: 11/1/2016 22:25
Attribute_Units_of_Measure: month/day/year and time
Attribute:
Attribute_Label: Latitude_WGS84
Attribute_Definition:
Latitude in decimal degrees north, measured using the WGS84 datum
Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 41.55417
Range_Domain_Maximum: 41.55468
Attribute_Units_of_Measure: decimal degrees
Attribute:
Attribute_Label: Longitude_WGS84
Attribute_Definition:
Longitude in decimal degrees west, measured using the WGS84 datum. A negative value indicates the western hemisphere
Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: -70.50713
Range_Domain_Maximum: -70.50611
Attribute_Units_of_Measure: decimal degrees
Attribute:
Attribute_Label: SSC_mgperL
Attribute_Definition: Suspended sediment concentration (SSC) of the water sample
Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 1.16
Range_Domain_Maximum: 18.212
Attribute_Units_of_Measure: milligrams per liter
Attribute:
Attribute_Label: POC_umolperL
Attribute_Definition:
Particulate organic carbon (POC) concentration of the water sample
Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 26.046
Range_Domain_Maximum: 595.658
Attribute_Units_of_Measure: micromoles per liter
Attribute:
Attribute_Label: d13C_POC_permil_VPDB
Attribute_Definition:
Delta (d) 13C of particulate organic carbon (POC) in the water sample, a measure of the stable isotopic ratio of 13C : 12C expressed relative to Vienna Pee Dee Belemnite (VPDB)
Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: -27.746
Range_Domain_Maximum: -16.01
Attribute_Units_of_Measure: per mil
Attribute:
Attribute_Label: TPN_umolperL
Attribute_Definition:
Total particulate nitrogen (TPN) concentration of the water sample
Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 2.418
Range_Domain_Maximum: 21.825
Attribute_Units_of_Measure: micromoles per liter
Attribute:
Attribute_Label: d15N_TPN_permil_AIR
Attribute_Definition:
Delta (d) 15N of total particulate nitrogen (TPN) in the water sample, a measure of the stable isotopic ratio of 15N : 14N expressed relative to air
Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: -1.033
Range_Domain_Maximum: 9.527
Attribute_Units_of_Measure: per mil
Detailed_Description:
Entity_Type:
Entity_Type_Label: SurfaceWater_GeochemicalData_SageLotPond
Entity_Type_Definition:
Surface water geochemical and field data collected from the tidal creek and marsh platform ponds at Sage Lot Pond, 2012-2016. This csv file contains 209 records.
Entity_Type_Definition_Source: Producer defined.
Attribute:
Attribute_Label: Sample_ID
Attribute_Definition:
Unique sample identifier assigned to the sample. Five samples collected from marsh platform ponds in 2016 are identified as such with an additional descriptor appended to the sample ID, e.g. 'SLP2016-59-Pond'.
Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:
Unrepresentable_Domain: Character set.
Attribute:
Attribute_Label: DateTime_UTC
Attribute_Definition:
Date and time in 24 hour Coordinated Universal Time (UTC) at which the water sample was collected in the format m/d/yyyy h:mm, month/day/year hour:minutes
Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 4/9/2012 13:03
Range_Domain_Maximum: 11/1/2016 22:11
Attribute_Units_of_Measure: month/day/year and time
Attribute:
Attribute_Label: Latitude_WGS84
Attribute_Definition:
Latitude in decimal degrees north, measured using the WGS84 datum
Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 41.55417
Range_Domain_Maximum: 41.55468
Attribute_Units_of_Measure: decimal degrees
Attribute:
Attribute_Label: Longitude_WGS84
Attribute_Definition:
Longitude in decimal degrees west, measured using the WGS84 datum. A negative value indicates the western hemisphere
Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: -70.50713
Range_Domain_Maximum: -70.50611
Attribute_Units_of_Measure: decimal degrees
Attribute:
Attribute_Label: Temperature_C
Attribute_Definition: Temperature of the water sample at the time of collection
Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 2.1
Range_Domain_Maximum: 30.9
Attribute_Units_of_Measure: degrees Celsius
Attribute:
Attribute_Label: SpecificConductance_mSpercm
Attribute_Definition:
A measure of the ability of the water sample to conduct electricity at the standard temperature of 25 degrees Celsius
Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 35.83
Range_Domain_Maximum: 48.24
Attribute_Units_of_Measure: milliseimens per centimeter
Attribute:
Attribute_Label: Salinity_PSU
Attribute_Definition:
Salinity of the water sample measured in practical salinity units (PSU, dimensionless)
Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 20.98
Range_Domain_Maximum: 31.41
Attribute_Units_of_Measure: practical salinity units (dimensionless)
Attribute:
Attribute_Label: DO_percentsaturation
Attribute_Definition: Dissolved oxygen saturation of the water sample
Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 8.6
Range_Domain_Maximum: 126.4
Attribute_Units_of_Measure: percent saturation
Attribute:
Attribute_Label: DO_mgperL
Attribute_Definition: Dissolved oxygen concentration of the water sample
Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.79
Range_Domain_Maximum: 12.28
Attribute_Units_of_Measure: milligrams per liter
Attribute:
Attribute_Label: pH
Attribute_Definition:
Negative logarithm of hydronium ion activity [H+] of the water sample
Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 6.11
Range_Domain_Maximum: 8.17
Attribute_Units_of_Measure: unitless
Attribute:
Attribute_Label: ORP_mV
Attribute_Definition: Oxidation/Reduction potential of the water sample
Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: -110.8
Range_Domain_Maximum: 299.6
Attribute_Units_of_Measure: millivolts
Attribute:
Attribute_Label: Salinity_AutoSal_PSU
Attribute_Definition:
High precision salinity of the water sample in practical salinity units (PSU, dimensionless). Measured on discrete bottle samples with a salinometer to a precision of 0.0001 PSU
Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 20.8020
Range_Domain_Maximum: 31.3679
Attribute_Units_of_Measure: practical salinity units (dimensionless)
Attribute:
Attribute_Label: Nitrate_umolperL
Attribute_Definition:
Concentration of dissolved nitrate plus nitrite (NO3- + NO2-) of the water sample. Note that the analytical limit of detection is equal to 0.05 micromoles per liter (LOD = 0.05 uM) and values below the LOD are truly an unknown value between zero and the LOD
Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0
Range_Domain_Maximum: 3.05
Attribute_Units_of_Measure: micromoles per liter
Attribute:
Attribute_Label: Ammonium_umolperL
Attribute_Definition:
Dissolved ammonium (NH4+) concentration of the water sample. Note that the analytical limit of detection is equal to 0.05 micromoles per liter (LOD = 0.05 uM) and values below the LOD are truly an unknown value between zero and the LOD
Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.10
Range_Domain_Maximum: 15.30
Attribute_Units_of_Measure: micromoles per liter
Attribute:
Attribute_Label: Phosphate_umolperL
Attribute_Definition:
Dissolved phosphate (PO43-) concentration of the water sample. Note that the analytical limit of detection is equal to 0.05 micromoles per liter (LOD = 0.05 uM) and values below the LOD are truly an unknown value between zero and the LOD
Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.08
Range_Domain_Maximum: 0.92
Attribute_Units_of_Measure: micromoles per liter
Attribute:
Attribute_Label: Silica_umolperL
Attribute_Definition: Dissolved total silica (Si) concentration in the water sample
Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 2.29
Range_Domain_Maximum: 19.50
Attribute_Units_of_Measure: micromoles per liter
Attribute:
Attribute_Label: TDN_umolperL
Attribute_Definition:
Total dissolved nitrogen (TDN) concentration of the water sample
Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 6.62
Range_Domain_Maximum: 66.84
Attribute_Units_of_Measure: micromoles per liter
Attribute:
Attribute_Label: TotalAlkalinity_ueqperL
Attribute_Definition: Total alkalinity of the water sample
Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 1016.96
Range_Domain_Maximum: 1987.01
Attribute_Units_of_Measure: microequivalents per liter
Attribute:
Attribute_Label: DIC_umolperL
Attribute_Definition:
Dissolved inorganic carbon (DIC) concentration of the water sample
Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 1276.46
Range_Domain_Maximum: 1655.74
Attribute_Units_of_Measure: micromoles per liter
Attribute:
Attribute_Label: DIC_d13C_VPDB_permil
Attribute_Definition:
Delta (d) 13C of dissolved inorganic carbon (DIC) in the water sample, a measure of the stable isotopic ratio of 13C : 12C expressed relative to Vienna Pee Dee Belemnite (VPDB)
Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: -7.46
Range_Domain_Maximum: 1.17
Attribute_Units_of_Measure: per mil
Attribute:
Attribute_Label: DOC_umolperL
Attribute_Definition:
Dissolved organic carbon (DOC) concentration of the water sample
Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 100.37
Range_Domain_Maximum: 1274.73
Attribute_Units_of_Measure: micromoles per liter
Attribute:
Attribute_Label: DOC_d13C_VPDB_permil
Attribute_Definition:
Delta (d) 13C of dissolved organic carbon (DOC) in the water sample, a measure of the stable isotopic ratio of 13C : 12C expressed relative to Vienna Pee Dee Belemnite (VPDB)
Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: -27.9
Range_Domain_Maximum: -19.2
Attribute_Units_of_Measure: per mil
Attribute:
Attribute_Label: Methane_nmolperL
Attribute_Definition:
Concentration of dissolved methane (CH4) gas in the water sample
Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 19.4
Range_Domain_Maximum: 333.2
Attribute_Units_of_Measure: nanomoles per liter
Attribute:
Attribute_Label: NitrousOxide_nmolperL
Attribute_Definition:
Concentration of dissolved nitrous oxide (N2O) gas in the water sample
Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 9.2
Range_Domain_Maximum: 26.5
Attribute_Units_of_Measure: nanomoles per liter
Attribute:
Attribute_Label: Mn_umolperL
Attribute_Definition:
Dissolved manganese (Mn) concentration of the water sample. Note that the analytical limit of detection is equal to 0.01 micromoles per liter (LOD = 0.01 uM) and values below the LOD are truly an unknown value between zero and the LOD
Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.2
Range_Domain_Maximum: 16.8
Attribute_Units_of_Measure: micromoles per liter
Attribute:
Attribute_Label: Fe_umolperL
Attribute_Definition:
Dissolved iron (Fe) concentration of the water sample. Note that the analytical limit of detection is equal to 0.01 micromoles per liter (LOD = 0.01 uM) and values below the LOD are truly an unknown value between zero and the LOD
Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.01
Range_Domain_Maximum: 119.02
Attribute_Units_of_Measure: micromoles per liter
Attribute:
Attribute_Label: Cu_nmolperL
Attribute_Definition:
Dissolved copper (Cu) concentration of the water sample. Note that the analytical limit of detection is equal to 0.01 nanomoles per liter (LOD = 0.01 nM) and values below the LOD are truly an unknown value between zero and the LOD
Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0
Range_Domain_Maximum: 134.2
Attribute_Units_of_Measure: nanomoles per liter
Attribute:
Attribute_Label: Sr_umolperL
Attribute_Definition:
Dissolved strontium (Sr) concentration of the water sample. Note that the analytical limit of detection is equal to 0.01 micromoles per liter (LOD = 0.01 uM) and values below the LOD are truly an unknown value between zero and the LOD
Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 52.3
Range_Domain_Maximum: 84.5
Attribute_Units_of_Measure: micromoles per liter
Attribute:
Attribute_Label: Ba_nmolperL
Attribute_Definition:
Dissolved barium (Ba) concentration of the water sample. Note that the analytical limit of detection is equal to 0.01 nanomoles per liter (LOD = 0.01 nM) and values below the LOD are truly an unknown value between zero and the LOD
Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 53.0
Range_Domain_Maximum: 173.5
Attribute_Units_of_Measure: nanomoles per liter
Attribute:
Attribute_Label: U_nmolperL
Attribute_Definition:
Dissolved uranium (U) concentration of the water sample. Note that the analytical limit of detection is equal to 0.01 nanomoles per liter (LOD = 0.01 nM) and values below the LOD are truly an unknown value between zero and the LOD
Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 7.9
Range_Domain_Maximum: 14.8
Attribute_Units_of_Measure: nanomoles per liter
Attribute:
Attribute_Label: Ra223_dpm_per100L
Attribute_Definition: Activity of radium-223 (223Ra) in the water sample
Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 5.7
Range_Domain_Maximum: 52.9
Attribute_Units_of_Measure: decays per minute per 100 liters
Attribute:
Attribute_Label: Ra224_dpm_per100L
Attribute_Definition: Activity of radium-224 (224Ra) in the water sample
Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 74.7
Range_Domain_Maximum: 722.3
Attribute_Units_of_Measure: decays per minute per 100 liters
Attribute:
Attribute_Label: Ra226_dpm_per100L
Attribute_Definition:
Activity of radium-226 (226Ra) in the water sample. Note that the analytical limit of detection (LOD) is equal to 5 decays per minute per 100L for porewater and groundwater and values below the LOD are truly an unknown value between zero and the LOD
Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 5.2
Range_Domain_Maximum: 89.9
Attribute_Units_of_Measure: decays per minute per 100 liters
Attribute:
Attribute_Label: Ra228_dpm_per100L
Attribute_Definition:
Activity of radium-228 (228Ra) in the water sample. Note that the analytical limit of detection (LOD) is equal to 5 decays per minute per 100L for porewater and groundwater and values below the LOD are truly an unknown value between zero and the LOD
Attribute_Definition_Source: Producer defined.
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 9.6
Range_Domain_Maximum: 314.4
Attribute_Units_of_Measure: decays per minute per 100 liters
Overview_Description:
Entity_and_Attribute_Overview:
The first line of the CSV file is a header line and those labels are the same as defined in the attribute section.
Note that blank cells in the attached data files indicate either the attribute does not pertain to the sample or the attribute was not measured for the sample. The explanation for the presence of blank cells for this entire dataset is therefore captured in the above description and is not stated for individual Attribute Definitions in addition.
Analytical limits of detection are reported in the Attribute Definition, when applicable. In a limited number of cases, post-processing of laboratory geochemical data resulted in slight negative values, insignificantly different from zero as based on known analytical precision and are reported as zero (0) in this dataset. Positive values that are below the analytical limit of detection are reported as measured and are not set to an arbitrary value such as 'zero' or 'BDL'. Note that any value below the reported limit of detection is truly an unknown value between zero and the limit of detection.
Entity_and_Attribute_Detail_Citation: U.S. Geological Survey
Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological Survey - ScienceBase
Contact_Address:
Address_Type: mailing and physical address
Address: Denver Federal Center, Building 810, Mail Stop 302
City: Denver
State_or_Province: CO
Postal_Code: 80225
Contact_Voice_Telephone: 1-888-275-8747
Contact_Electronic_Mail_Address: sciencebase@usgs.gov
Resource_Description:
The dataset contains the following files: SurfaceWater_GeochemicalData_SageLotPond.csv (surface water geochemical data in a comma-separated text file), SurfaceWater_ParticulateData_SageLotPond.csv (surface water particulate data in a comma-separated text file), Porewater_GeochemicalData_SageLotPond_GreatPond.csv (porewater geochemical data in a comma-separated text file), DataDictionary_SageLotPond_GreatPond.csv (comm-separated text file describing the contents and structure of the data files), Thumbnail_Image_SageLotPond.jpg (browse graphic), and FGDC CSDGM metadata in XML, text and HTML formats.
Distribution_Liability:
Neither the U.S. Government, the Department of the Interior, nor the USGS, nor any of their employees, contractors, or subcontractors, make any warranty, express or implied, nor assume any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, nor represent that its use would not infringe on privately owned rights. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the USGS in the use of these data or related materials. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: CSV
Format_Information_Content:
The zip file contains CSV files, browse graphic and associated metadata.
Transfer_Size: 1
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information: Access_Instructions:
The first link downloads all the files on the landing page in a zip file, the second link takes the user to the landing page of the data, and the third link is to the main landing page of the data release.
Fees: None.
Technical_Prerequisites:
These data are available in CSV format. The user must have software capable of reading this data format.
Metadata_Reference_Information:
Metadata_Date: 20210514
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: U.S. Geological Survey
Contact_Person: Thomas W. Brooks
Contact_Position: Physical Scientist
Contact_Address:
Address_Type: mailing and physical
Address: 384 Woods Hole Rd.
City: Woods Hole
State_or_Province: MA
Postal_Code: 02543-1598
Country: USA
Contact_Voice_Telephone: 508-548-8700 x2359
Contact_Electronic_Mail_Address: wallybrooks@usgs.gov
Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998

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