Metadata: Identification_Information: Citation: Citation_Information: Originator: Rebecca Sanders-DeMott Originator: Meagan J. Eagle Originator: Kevin D. Kroeger Originator: Thomas W. Brooks Originator: Jennifer A. O'Keefe Suttles Originator: Sydney K. Nick Originator: Adrian G. Mann Originator: Sophie Kuhl Originator: Simone Gibson Publication_Date: 2022 Title: Static chamber fluxes of carbon dioxide and methane from coastal wetlands on Upper Cape Cod, Massachusetts and supporting environmental data, 2021 Edition: 1.0 Geospatial_Data_Presentation_Form: tabular digital data Series_Information: Series_Name: data release Issue_Identification: DOI:10.5066/P9RRL3T0 Publication_Information: Publication_Place: Woods Hole Coastal and Marine Science Center, Woods Hole, MA Publisher: U.S. Geological Survey, Coastal and Marine Hazards and Resources Program Online_Linkage: https://doi.org/10.5066/P9RRL3T0 Online_Linkage: https://www.sciencebase.gov/catalog/item/629fa3e2d34ec53d276fd537 Larger_Work_Citation: Citation_Information: Originator: Rebecca Sanders-DeMott Originator: Meagan Eagle Originator: Kevin Kroeger Originator: Faming Wang Originator: T. Wallace Brooks Originator: Jennifer A. O'Keefe Suttles Originator: Sydney Nick Originator: Adrian Mann Originator: Jianwu Tang Publication_Date: 2022 Title: Carbon dioxide and methane fluxes with supporting environmental data from coastal wetlands across Cape Cod, Massachusetts (ver 2.0, June 2022) Edition: 1 Geospatial_Data_Presentation_Form: tabular digital data Series_Information: Series_Name: data release Issue_Identification: DOI:10.5066/P9RRL3T0 Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Other_Citation_Details: Suggested citation: Sanders-DeMott, R., Eagle, M.J., Kroeger, K.D., Wang, F., Brooks, T.W., O'Keefe Suttles, J.A., Nick, S.K., Mann, A.G., and Tang, J. 2022, Carbon dioxide and methane fluxes with supporting environmental data from coastal wetlands across Cape Cod, Massachusetts (ver 2.0, June 2022): U.S. Geological Survey data release, https://doi.org/10.5066/P9RRL3T0. Online_Linkage: https://doi.org/10.5066/P9RRL3T0 Online_Linkage: https://www.sciencebase.gov/catalog/item/62557ae8d34e21f8276f4879 Description: Abstract: Saline tidal wetlands are important sites of carbon sequestration and produce negligible methane (CH4) emissions due to regular inundation with sulfate-rich seawater. Yet, widespread management of coastal hydrology has restricted vast areas of coastal wetlands to tidal exchange. These ecosystems often undergo impoundment and freshening, which in turn cause vegetation shifts like invasion by Phragmites, that affect ecosystem carbon balance. Understanding controls of carbon exchange in these understudied ecosystems is critical for informing climate consequences of blue carbon restoration and/or management interventions. Here we present measurements of net ecosystem exchange of carbon dioxide (CO2) and methane, along with ancillary meteorological data, collected from coastal wetlands across Cape Cod to evaluate the effect of hydrological management and salinity on carbon exchange in coastal wetlands. Purpose: Measurements of carbon dioxide and methane fluxes from static chambers were collected in 2021 to assess carbon exchange at coastal wetland sites across a range of impounded and natural, tidally unrestricted conditions in several villages within Falmouth, MA that vary in salinity, management status, and water level. Environmental metrics that could inform carbon exchange, including air and soil temperature, and photosynthetically active radiation were also collected to support data interpretation. This dataset can help evaluate the effect of hydrologic management on carbon dioxide and methane exchange in coastal wetlands. Data were collected to inform predictive models of carbon fluxes across coastal wetlands of varying management status and salinity and to facilitate National Park Service restoration planning and future blue carbon project assessments. Supplemental_Information: This dataset is a new addition to version 2 of this data release. For more information, see the following field activities: https://cmgds.marine.usgs.gov/fan_info.php?fan=2021-026-FA and https://cmgds.marine.usgs.gov/fan_info.php?fan=2022-011-FA Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 20210425 Ending_Date: 20220518 Currentness_Reference: Ground condition. These dates bracket the period of monthly sampling when the measurements were made. Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -70.6703 East_Bounding_Coordinate: -70.4984 North_Bounding_Coordinate: 41.6015 South_Bounding_Coordinate: 41.5295 Keywords: Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Category Theme_Keyword: biota Theme_Keyword: environment Theme_Keyword: climatologyMeteorologyAtmosphere Theme_Keyword: geoscientificInformation Theme: Theme_Keyword_Thesaurus: USGS Thesaurus Theme_Keyword: carbon Theme_Keyword: wetland ecosystems Theme_Keyword: wetland functions Theme_Keyword: ecology Theme_Keyword: invasive species Theme_Keyword: ecological processes Theme: Theme_Keyword_Thesaurus: National Agricultural Library Thesaurus Theme_Keyword: salt marshes Theme_Keyword: ecological restoration Theme_Keyword: wetlands Theme: Theme_Keyword_Thesaurus: USGS Metadata Identifier Theme_Keyword: USGS:629fa3e2d34ec53d276fd537 Place: Place_Keyword_Thesaurus: Geographic Names Information System (GNIS) Place_Keyword: Cape Cod (606914) Place_Keyword: Sage Lot Pond (616548) Place_Keyword: Flat Pond (615605) Place_Keyword: Woods Hole (617060) Place_Keyword: West Falmouth (616149) Place_Keyword: Waquoit Village (617261) Place_Keyword: Commonwealth of Massachusetts (606926) Place_Keyword: United States of America Place_Keyword: Barnstable County (606927) Access_Constraints: None. Please see 'Distribution Info' for details. Use_Constraints: None. Users are advised to read the dataset's metadata thoroughly to understand appropriate use and data limitations. Point_of_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Rebecca Sanders-Demott Contact_Organization: U.S. Geological Survey, NORTHEAST REGION Contact_Address: Address_Type: mailing address Address: 384 Woods Hole Road City: Woods Hole State_or_Province: MA Postal_Code: 02543 Country: US Contact_Voice_Telephone: 508-548-8700 x2255 Contact_Electronic_Mail_Address: rsanders-demott@usgs.gov Browse_Graphic: Browse_Graphic_File_Name: https://www.sciencebase.gov/catalog/file/get/629fa3e2d34ec53d276fd537?name=phragmites_chamber.jpg&allowOpen=true Browse_Graphic_File_Description: Browse graphic is a photograph of a chamber sampling platform in a Phragmites wetland at Sage Lot Pond, Waquoit, MA. Browse_Graphic_File_Type: JPEG Cross_Reference: Citation_Information: Originator: Sanders-DeMott, Rebecca Originator: Eagle, Meagan J. Originator: Kroeger, Kevin D. Originator: Wang, Faming Originator: Brooks, Thomas W. Originator: O'Keefe Suttles, Jennifer A. Originator: Nick, Sydney K. Originator: Mann, Adrian G. Originator: Tang, Jianwu Publication_Date: 2022 Title: Impoundment increases methane emissions in Phragmites-invaded coastal wetlands Series_Information: Series_Name: Global Change Biology Issue_Identification: DOI:10.1111/gcb.16217 Publication_Information: Publication_Place: Hoboken, New Jersey Publisher: Wiley Other_Citation_Details: Journal article based on prior data from some of the sampling locations included in this data release. Online_Linkage: https://doi.org/10.1111/gcb.16217 Cross_Reference: Citation_Information: Originator: Jennifer A. O'Keefe Suttles Originator: Meagan J. Eagle Originator: Rebecca Sanders-DeMott Originator: Sydney K. Nick Originator: Thomas W. Brooks Originator: Adrian G. Mann Originator: Kevin D. Kroeger Publication_Date: 2022 Title: Continuous Water Level, Salinity, and Temperature Data from Coastal Wetland Monitoring Wells, Cape Cod, Massachusetts Edition: 1 Geospatial_Data_Presentation_Form: tabular digital data Series_Information: Series_Name: data release Issue_Identification: DOI:10.5066/P9T1KOTW Publication_Information: Publication_Place: Reston, VA Publisher: U.S. Geological Survey Other_Citation_Details: Provides continuous data on water level, salinity, and water temperature concurrent with chamber flux measurements presented in this data release. Online_Linkage: https://doi.org/10.5066/P9T1KOTW Online_Linkage: https://www.sciencebase.gov/catalog/item/624b1581d34e21f827635bd0 Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: The LI-7810 CH4/CO2/H2O Trace Gas Analyzer has a precision of 0.60 parts per billion (ppb) at 2 parts per million (ppm) with 1 second averaging for methane (CH4) and of 3.5 ppm at 400 ppm with 1 second averaging for carbon dioxide (CO2). The instrument calibration was checked using laboratory calibration gases prior to field measurements in spring 2020. All calculated slopes used to calculate fluxes were subject to statistical checks as outlined in Process Step 1. Each sampling location was measured in triplicate for gas fluxes and with ten replicates for biomass assessments to reduce uncertainty. Manufacturer's specifications for the dual channel temperature logger (used in this study for continuous measurement of soil and air (-10 cm and 1 m respectively from land surface; Onset, model type HOBO U23 Pro v2 and MX2303) for accuracy is +/- 0.21 degrees Celsius from 0 degrees Celsius to 50 degrees Celsius; the manufacturer's specification for resolution is 0.02 degrees Celsius at 25 degrees Celsius. Accuracy of the photosynthetically active raditation (PAR) sensor +/- 5 micromoles per meter squared per second and resolution of the PAR sensor is 2.5 micromoles per meter squared per second. Relative humidty (RH) sensor was enclosed within a solar radiation shield and deployed on a mast with other meteorological sensors. Typical accuracy of the RH sensor is +/-2.5 percent and resolution is 0.1 percent RH. No formal attribute accuracy tests were conducted. Logical_Consistency_Report: Each logged parameter set was queried for maximum and minimum values to be sure logged data fell within expected ranges for the environmental conditions. Completeness_Report: Gaps in the continuous data record for a given parameter may have been the result of one of several sources: sensor not deployed during that time period, vandalism of an instrument by humans or destruction by chewing animals, removal of an instrument for maintenance, corrupt data file due to malfunctioning instrument, or data excluded based on quality assessment described in process step. Exclusions of data from the continuous record are coded as blank cells. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: Latitude and Longitude were measured for each of the chamber gas sampling collars (3 per sampling location) and the paired soil and air temperature sensors (1 per sampling location) by Trimble Real-Time Kinematic (RTK) GPS at the end of the sampling season. Recorded Horizontal Dilution of Precision (HDOP) was 0.600 or less for all measurements. Average horizontal accuracy of this method is +/- 30 centimeters. No formal positional accuracy tests were conducted. Vertical_Positional_Accuracy: Vertical_Positional_Accuracy_Report: Land surface elevations were measured for each of the chamber gas sampling collars (3 per sampling location) and the paired soil and air temperature sensors (1 per sampling location) by Trimble Real-Time Kinematic (RTK) GPS at the end of the sampling season. Recorded Vertical Dilution of Precision (VDOP) was 0.900 or less for all measurements. Average vertical accuracy of this method is +/- 5 centimeters. No formal positional accuracy tests were conducted. Lineage: Process_Step: Process_Description: Six sampling locations were established across several villages of Falmouth, MA for static chamber sampling. Two sampling locations were established at a site with natural, unrestricted tidal exchange at Sage Lot Pond, two in an impounded marsh at Flat Pond, one site in West Falmouth behind a Quaker Meeting House, and one site in Woods Hole behind Woods Hole Park. Each sampling location was equipped with three replicate collars for static chamber measurements and one pair of air/soil temperature sensors. The two sites at Sage Lot Pond were part of a prior study established in 2020 and data collected in 2020 from those sites is available at https://www.sciencebase.gov/catalog/item/62557ae8d34e21f8276f4879. To facilitate static chamber CH4 and CO2 flux measurements, round PVC collars (55 cm inner diameter, 24 cm height, 3 replicates per sampling location (n = 6)) were inserted into the sediment surrounding intact vegetation to a depth of at least 10 cm more than four weeks prior to initial sampling to allow the soil to equilibrate from disturbance. On each sample collection date, we used a modular system of clear, round acrylic chambers to enclose the vegetation and sediment surface for flux measurement. Chamber sections were 55 cm diameter and 0.91 meters (m) tall. Depending on the height of the vegetation at the sampling location we used either one, two, or three stacked chambers for a total chamber height of 0.91, 1.83 or 2.74 m and empty chamber volume of 0.22, 0.43 or 0.64 cubic meters (m3). The topmost chamber always had a transparent lid permanently affixed with silicone caulking and a vent tube to allow for pressure equilibration. Two battery-powered fans (10 cm in diameter) were attached to the inside of the chamber to homogenize air and temperature sensors (HOBO TidbiT v2, Onset Computer Corporation) were mounted to the inside of the top and bottom chambers to record chamber air temperature. All samples were collected during mid-day hours between 10:00-14:00 local standard time. Chamber air was considered equilibrated based on visual inspection of the stability of a linear concentration change in the gases of interest, this was typically less than 60 seconds. Field data required to calculate fluxes (i.e., chamber head space, chamber deployment time) were recorded on field datasheets and later entered into electronic spreadsheets. Concentrations of CH4 and CO2 during 2-5 minutes incubations were measured and recorded using a portable optical feedback-cavity enhanced absorption spectrometer (LI-7810 CH4/CO2/H2O Trace Gas Analyzer, LI-COR, Inc.) sampling at 1 Hz. Chamber flux incubations were conducted both in the light with transparent chambers to quantify net ecosystem exchange, and in the dark with opaque covering of the chambers to quantify ecosystem respiration in the absence of photosynthesis. We used a sliding regression (“rollRegres” package in R, Christoffersen, 2019) to identify the 120-second window during the incubation where a simple linear regression of CH4 or CO2 concentration by time had a maximum R2. We verified that all linear models used to calculate flux had a significant slope (p less than 0.001) and an RMSE ≤ 1 ppm for CO2 and ≤ 10 ppb for CH4. Four CO2 measurements did not have a slope significantly different than 0, and therefore those fluxes were set to 0. Three additional CO2 measurements were rejected for low R2 and RMSE > 1 ppm. We also assessed each incubation for non-linear changes in CH4 concentration over time as a signal of potential ebullition. When potential ebullition was observed, in addition to applying the sliding regression described above, we estimated CH4 concentration change based on the initial and final concentration of CH4 gas (VCS, 2015). The rate of concentration change of CO2 and CH4 (slope or the difference between final and initial when ebullition was suspected) was converted to an area-based flux using the Ideal Gas Law and the volume and footprint of the chamber, along with measured chamber air temperature (pooled across the two temperature sensors). Calculations were executed with the “conc_to_flux” function in the R package “ecoflux” (Shannon, 2018). This process step and all subsequent process steps (unless otherwise noted) were performed by the same person, Rebecca Sanders-Demott. Christoffersen, B., 2019, rollRegres: Fast Rolling and Expanding Window Linear Regression. R package version 0.1.3. https://CRAN.R-project.org/package=rollRegres Shannon, J., 2018, ecoFlux: Functions for ecological flux studies including sap flux and soil/stem C efflux (0.3.1). https://rdrr.io/github/jpshanno/ecoflux/ Verified Carbon Standard (VCS), 2015, Approved VCS Methodology VM 0033: Methodology for Tidal Wetland and Seagrass Restoration. Version 1.0, 20 November 2015, Sectoral Scope 14. Developed by Verra with Restore America’s Estuaries and Silvestrum. 1–115. https://verra.org/wp-content/uploads/2018/03/VM0033-Tidal-Wetland-and-Seagrass-Restoration-v1.0.pdf Process_Date: 20211015 Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Rebecca Sanders-Demott Contact_Organization: U.S. Geological Survey, NORTHEAST REGION Contact_Address: Address_Type: mailing address Address: 384 Woods Hole Road City: Woods Hole State_or_Province: MA Postal_Code: 02543 Country: US Contact_Voice_Telephone: 508-548-8700 x2255 Contact_Electronic_Mail_Address: rsanders-demott@usgs.gov Process_Step: Process_Description: Soil volumetric water content (VWC) integrated over the top 5 cm was measured (Meter Group Inc., TEROS-10) just outside each collar after gas sampling. Values were recorded by hand on a field data sheet and later entered into an electronic spreadsheet. Process_Date: 20211015 Process_Step: Process_Description: Photosynthetically active radiation (PAR) was measured concurrent with chamber sampling with a PAR sensor (Onset Photosynthetically Active Radiation (PAR) Smart Sensor, model S-LIA-M003) deployed on a portable 4-meter tall tripod mast that was set up adjacent to each site during sampling. Data were logged every 1 minute from the time we arrived on site until chamber sampling was completed on an Onset HOBO USB Microstation Logger. When daily sampling was completed, data files were downloaded to a field laptop via HOBOware software (version 3.7.2.1), converted to .csv files, and matched by timestamp to the chamber incubation data via R. Process_Date: 20211015 Process_Step: Process_Description: At each chamber sampling location, the three replicate collars were paired with one soil temperature sensor (10 cm depth) and one air temperature sensor (1 m height) mounted on a PVC well in April 2021. Air and soil temperature were logged every 15 minutes. Raw data files were downloaded in the field monthly. Ultimately all data were uploaded as .hobo files to the Woods Hole Coastal and Marine Science Center (WHCMSC) network server. Raw data files were converted to CSV files in the software: HOBOware (version 3.7.2.1). Data were plotted to check for any irregularities in sensor functioning (e.g. outliers or unrealistic values). All found irregularities were removed from the final dataset. Process_Date: 20220518 Process_Step: Process_Description: Latitude and longitude of each chamber and sensor location, along with elevation of chambers was measured with a Trimble Real-Time Kinematic (RTK) GPS. Accuracy was 2-3 cm according to instrument corrections. Data files were exported from the instrument via a .csv file and appended to the data files of calculated fluxes or sensors via R. Process_Date: 20211118 Process_Step: Process_Description: After all chamber flux data were finalized, we exported the sensor data (logged at 15-minute intervals) that most closely matched the timestamp of the chamber incubation and appended those values to the chamber fluxes data table using R for user convenience. Sensor data included are air and soil temperature described here and availanble in the file air_soil_temp_2021-2022.csv (part of this data release), as well as data on water temperature, water table depth below surface, and salinity, which are available in O'Keefe Suttles and others, 2022. O'Keefe Suttles, J.A., Eagle, M.J., Sanders-DeMott, R., Nick, S.K., Brooks, T.W., Mann, A.G., and Kroeger, K.D., 2022, Continuous water level, salinity, and temperature data from coastal wetland monitoring wells, Cape Cod, Massachusetts: U.S. Geological Survey data release, https://doi.org/10.5066/P9T1KOTW. Process_Date: 20220415 Spatial_Data_Organization_Information: Indirect_Spatial_Reference: Geographic Names Information System (GNIS) placenames are included as keywords to give the general location of core collections. The entity contains attributes with specific latitude and longitude of each core collection; several attributes are also included to describe the core collection location (nearest body of water and vegetation type). Refer to the entity and attribute definitions for "site_name", "veg_type", "site_name", "status", and "sampling_location_name" for details. 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: 1.0E-5 Longitude_Resolution: 1.0E-5 Geographic_Coordinate_Units: Decimal degrees Geodetic_Model: Horizontal_Datum_Name: North American Datum of 1983 Ellipsoid_Name: Geodetic Reference System 80 Semi-major_Axis: 6378137.0 Denominator_of_Flattening_Ratio: 298.257222101 Vertical_Coordinate_System_Definition: Altitude_System_Definition: Altitude_Datum_Name: North American Vertical Datum of 1988 Altitude_Resolution: 0.001 Altitude_Distance_Units: meters Altitude_Encoding_Method: Attribute values Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: chamber_fluxes_2021.csv Entity_Type_Definition: Comma Separated Value (CSV) file containing data on methane and carbon dioxide fluxes. This dataset has 216 records. Entity_Type_Definition_Source: Producer Defined Attribute: Attribute_Label: date Attribute_Definition: Date the measurement was collected in the format yyyy-mm-dd. Attribute_Definition_Source: Producer Defined Attribute_Domain_Values: Unrepresentable_Domain: Numeric value representing the date Attribute: Attribute_Label: start_datetime Attribute_Definition: Date and time that the chamber incubation was started in local standard time (UTC - 05:00) in the format yyyy-mm-dd hh:mm:ss. Attribute_Definition_Source: Producer Defined Attribute_Domain_Values: Unrepresentable_Domain: Numeric value representing the date and time. Attribute: Attribute_Label: end_datetime Attribute_Definition: Date and time that the chamber incubation was ended in local standard time (UTC - 05:00) in the format yyyy-mm-dd hh:mm:ss. Attribute_Definition_Source: Producer Defined Attribute_Domain_Values: Unrepresentable_Domain: Numeric value representing the date and time. Attribute: Attribute_Label: site_name Attribute_Definition: Site name of sampling location Attribute_Definition_Source: Producer Defined Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Sage Lot Pond Enumerated_Domain_Value_Definition: A site located within the Waquoit Bay National Estuarine Research Reserve in Waquoit, MA. Enumerated_Domain_Value_Definition_Source: Producer defined Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Flat Pond Enumerated_Domain_Value_Definition: A site located within the Waquoit Bay National Estuarine Research Reserve in Waquoit, MA. Enumerated_Domain_Value_Definition_Source: Producer defined Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Woods Hole Park Enumerated_Domain_Value_Definition: A site located in the village of Woods Hole, MA. Enumerated_Domain_Value_Definition_Source: Producer defined Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Quaker Meeting House Enumerated_Domain_Value_Definition: A site located within West Falmouth, MA. Enumerated_Domain_Value_Definition_Source: Producer defined Attribute: Attribute_Label: status Attribute_Definition: Hydrological management status of the sampling location Attribute_Definition_Source: Producer Defined Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Unrestricted Enumerated_Domain_Value_Definition: Indicates that the sampling location experiences natural, unrestricted tidal exchange. Enumerated_Domain_Value_Definition_Source: Producer defined Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Impounded Enumerated_Domain_Value_Definition: Indicates that at this sampling location water is retained but tidal exchange is limited or excluded by infrastructure such as dikes, roads, or culverts. Enumerated_Domain_Value_Definition_Source: Producer defined Attribute: Attribute_Label: veg_type Attribute_Definition: Dominant vegetation at sampling location Attribute_Definition_Source: Producer Defined Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Phragmites Wetland Enumerated_Domain_Value_Definition: Sampling location is a wetland dominated by Phragmites australis Enumerated_Domain_Value_Definition_Source: Producer defined Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Typha/Schoenoplectus Wetland Enumerated_Domain_Value_Definition: Sampling location is a wetland dominated by Typha latifolia and Schoenoplectus Enumerated_Domain_Value_Definition_Source: Producer defined Attribute: Attribute_Label: sampling_location_name Attribute_Definition: Sampling location name indicating both the hydrological management and salinity status relative to the geographical site as referenced in the related publication (Sanders-DeMott and others, 2022) Attribute_Definition_Source: Producer Defined Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Unrestricted-High Enumerated_Domain_Value_Definition: Sampling location that experiences natural, unrestricted tidal exchange and is the high salinity plot of the site pair at Sage Lot Pond as referenced in the related publication (Sanders-DeMott and others, 2022) Enumerated_Domain_Value_Definition_Source: Producer defined Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Unrestricted-Low Enumerated_Domain_Value_Definition: Sampling location that experiences natural, unrestricted tidal exchange and is the low salinity plot of the site pair at Sage Lot Pond as referenced in the related publication (Sanders-DeMott and others, 2022) Enumerated_Domain_Value_Definition_Source: Producer defined Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Impounded-FPP Enumerated_Domain_Value_Definition: Sampling location that experiences tidal exchange that is limited or excluded and is located in a Phrgamites stand at Flat Pond Enumerated_Domain_Value_Definition_Source: Producer defined Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Impounded-FPTS Enumerated_Domain_Value_Definition: Sampling location that experiences tidal exchange that is limited or excluded and is located in a mixed Typha latifolia and Schoenoplectus stand at Great Flat Pond Enumerated_Domain_Value_Definition_Source: Producer defined Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Impounded-WH Enumerated_Domain_Value_Definition: Sampling location that experiences tidal exchange that is limited or excluded and is located in Woods Hole Park in Woods Hole, MA Enumerated_Domain_Value_Definition_Source: Producer defined Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Impounded-QMH Enumerated_Domain_Value_Definition: Sampling location that experiences tidal exchange that is limited or excluded and is located on Quaker Meeting House property in West Falmouth, MA Enumerated_Domain_Value_Definition_Source: Producer defined Attribute: Attribute_Label: chamber_rep Attribute_Definition: Identifier of the chamber replicate at each sampling location Attribute_Definition_Source: Producer Defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1 Range_Domain_Maximum: 3 Attribute: Attribute_Label: latitude Attribute_Definition: Latitude decimal degrees north, NAD83 Attribute_Definition_Source: Producer Defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 41.52952 Range_Domain_Maximum: 41.60149 Attribute_Units_of_Measure: decimal degrees Attribute: Attribute_Label: longitude Attribute_Definition: Longitude decimal degrees west, NAD83. The negative value indicates a location in the western hemisphere. Attribute_Definition_Source: Producer Defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -70.67031 Range_Domain_Maximum: -70.49842 Attribute_Units_of_Measure: decimal degrees Attribute: Attribute_Label: elevation Attribute_Definition: Elevation relative to NAVD88 datum in meters. Attribute_Definition_Source: Producer Defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.15 Range_Domain_Maximum: 1.36 Attribute_Units_of_Measure: meters Attribute: Attribute_Label: chamber_transparency Attribute_Definition: Indicator of whether chamber incubation was conducted with transparent chamber to allow light exposure or opaque chamber to block out light. Attribute_Definition_Source: Producer Defined Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: opaque Enumerated_Domain_Value_Definition: Chamber incubation conducted with an opaque cover to block out sunlight and assess fluxes in the dark. Enumerated_Domain_Value_Definition_Source: Producer defined Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: transparent Enumerated_Domain_Value_Definition: Chamber incubation conducted with a transparent chamber to allow sunlight and assess fluxes in the light. Enumerated_Domain_Value_Definition_Source: Producer defined Attribute: Attribute_Label: CH4_flux Attribute_Definition: Flux of methane calculated from the slope of CH4 concentration change in nanomoles of CH4 per square meter per second (nmol CH4 m-2 sec-1). Positive values indicate a flux of methane out of the ecosystem into the atmosphere and negative values indicate a flux out of the atmosphere into the ecosystem. Attribute_Definition_Source: Producer Defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.38 Range_Domain_Maximum: 587.62 Attribute_Units_of_Measure: nmol CH4 m-2 sec-1 Attribute: Attribute_Label: CH4_flux_ebullition Attribute_Definition: Flux of methane calculated in nanomoles of CH4 per square meter per second (nmol CH4 m-2 sec-1) when ebullition was suspected. Calculation is based on the difference between initial and final concentration as applicable when ebullition was suspected due to non-linear changes in CH4 concentration during incubation. Positive values indicate a flux of methane out of the ecosystem into the atmosphere and negative values indicate a flux out of the atmosphere into the ecosystem. Attribute_Definition_Source: Producer Defined Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: empty cell Enumerated_Domain_Value_Definition: No ebullition was observed Enumerated_Domain_Value_Definition_Source: Producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 49.16 Range_Domain_Maximum: 344.48 Attribute_Units_of_Measure: nmol CH4 m-2 sec-1 Attribute: Attribute_Label: CO2_flux Attribute_Definition: Flux of carbon dioxide calculated from the slope of CO2 concentration change in micromoles of CO2 per square meter per second (umol CO2 m-2 sec-1). Positive values indicate a flux of CO2 out of the ecosystem into the atmosphere and negative values indicate a flux out of the atmosphere into the ecosystem. Attribute_Definition_Source: Producer Defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -24.92 Range_Domain_Maximum: 21.29 Attribute_Units_of_Measure: umol CO2 m-2 sec-1 Attribute: Attribute_Label: soil_moisture Attribute_Definition: Soil volumetric water content (VWC) in percent integrated over the top 5 cm of soil. Measured with handheld Meter Group Inc., TEROS-10 just outside each collar after gas sampling. Attribute_Definition_Source: Producer Defined Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: empty cell Enumerated_Domain_Value_Definition: No measurement recorded due to flooded surface Enumerated_Domain_Value_Definition_Source: Producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 32 Range_Domain_Maximum: 74.1 Attribute_Units_of_Measure: percent Attribute: Attribute_Label: salinity Attribute_Definition: Salinity in practical salinity units (psu) at time of chamber sampling measured within 2 meters of chamber collar in a ~30 cm deep 3 cm-diameter PVC well screened from 0 to 20 cm depth and equipped to continuously (15-minute intervals) monitor water-table depth relative to the soil surface, salinity, and water temperature (In-Situ Inc., Aqua TROLL 200). This is a specific subsample of a larger time series dataset. Full dataset available in O'Keefe Suttles and others, 2022. O'Keefe Suttles, J.A., Eagle, M.J., Sanders-DeMott, R., Nick, S.K., Brooks, T.W., Mann, A.G., and Kroeger, K.D., 2022, Continuous water level, salinity, and temperature data from coastal wetland monitoring wells, Cape Cod, Massachusetts: U.S. Geological Survey data release, https://doi.org/10.5066/P9T1KOTW. Attribute_Definition_Source: Producer Defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.143 Range_Domain_Maximum: 23.916 Attribute_Units_of_Measure: psu Attribute: Attribute_Label: dbs Attribute_Definition: Water table depth relative to the soil surface in meters (where negative values indicate water level is below the soil surface and positive values indicate flooded conditions with water table above the soil surface) at time of chamber sampling. Measurements were within 2 meters of chamber collar in a ~30 cm deep 3 cm-diameter PVC well screened from 0 to 20 cm depth and equipped to continuously (15-minute intervals) monitor water-table depth relative to the soil surface, salinity, and water temperature (In-Situ Inc., Aqua TROLL 200). This is a specific subsample of a larger time series dataset. Full dataset available in O'Keefe Suttles and others, 2022. O'Keefe Suttles, J.A., Eagle, M.J., Sanders-DeMott, R., Nick, S.K., Brooks, T.W., Mann, A.G., and Kroeger, K.D., 2022, Continuous water level, salinity, and temperature data from coastal wetland monitoring wells, Cape Cod, Massachusetts: U.S. Geological Survey data release, https://doi.org/10.5066/P9T1KOTW. Attribute_Definition_Source: Producer Defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -0.172 Range_Domain_Maximum: 0.267 Attribute_Units_of_Measure: meters Attribute: Attribute_Label: water_temp Attribute_Definition: Water temperature in degrees Celsius at time of chamber sampling measured within 2 meters of chamber collar in a ~30 cm deep 3 cm-diameter PVC well screened from 0 to 20 cm depth and equipped to continuously (15-minute intervals) monitor water-table depth relative to the soil surface, salinity, and water temperature (In-Situ Inc., Aqua TROLL 200). This is a specific subsample of a larger time series dataset. Full dataset available in O'Keefe Suttles and others, 2022. O'Keefe Suttles, J.A., Eagle, M.J., Sanders-DeMott, R., Nick, S.K., Brooks, T.W., Mann, A.G., and Kroeger, K.D., 2022, Continuous water level, salinity, and temperature data from coastal wetland monitoring wells, Cape Cod, Massachusetts: U.S. Geological Survey data release, https://doi.org/10.5066/P9T1KOTW. Attribute_Definition_Source: Producer Defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 12.5 Range_Domain_Maximum: 20.053 Attribute_Units_of_Measure: degrees Celsius Attribute: Attribute_Label: soil_temp Attribute_Definition: Soil temperature in degrees Celsius measured at 10 cm depth below the soil surface at the time of chamber sampling. This is a specific subsample of a larger time series dataset. Full dataset available in air_soil_temp_2021-2022.csv (part of this data release). Attribute_Definition_Source: Producer Defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 13.016 Range_Domain_Maximum: 21.62 Attribute_Units_of_Measure: degrees Celsius Attribute: Attribute_Label: air_temp Attribute_Definition: Air temperature in degrees Celsius measured at 1 m height above the soil surface at the time of chamber sampling. This is a specific subsample of a larger time series dataset. Full dataset available in air_soil_temp_2021-2022.csv (part of this data release) Attribute_Definition_Source: Producer Defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 18.96 Range_Domain_Maximum: 32.0 Attribute_Units_of_Measure: degrees Celsius Attribute: Attribute_Label: par Attribute_Definition: Photosynthetically active radiation (PAR) in micromoles photons per meter squared per second (umol photons m-2 sec-1) at the time of chamber sampling. Attribute_Definition_Source: Producer Defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 164.1 Range_Domain_Maximum: 2131.2 Attribute_Units_of_Measure: umol photons m-2 sec-1 Detailed_Description: Entity_Type: Entity_Type_Label: air_soil_temp_2021-2022.csv Entity_Type_Definition: Comma Separated Value (CSV) file containing data on soil and air temperature. The dataset has 307729 records. Entity_Type_Definition_Source: Producer Defined Attribute: Attribute_Label: datetime Attribute_Definition: Date and time that sensor measurement was logged in local standard time (UTC - 05:00) in the format yyyy-mm-dd hh:mm:ss. Attribute_Definition_Source: Producer Defined Attribute_Domain_Values: Unrepresentable_Domain: A numeric value representing date and time. Attribute: Attribute_Label: site_name Attribute_Definition: Site name of sampling location Attribute_Definition_Source: Producer Defined Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Sage Lot Pond Enumerated_Domain_Value_Definition: A site located within the Waquoit Bay National Estuarine Research Reserve in Waquoit, MA. Enumerated_Domain_Value_Definition_Source: Producer defined Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Flat Pond Enumerated_Domain_Value_Definition: A site located within the Waquoit Bay National Estuarine Research Reserve in Waquoit, MA. Enumerated_Domain_Value_Definition_Source: Producer defined Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Woods Hole Park Enumerated_Domain_Value_Definition: A site located in the village of Woods Hole, MA. Enumerated_Domain_Value_Definition_Source: Producer defined Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Quaker Meeting House Enumerated_Domain_Value_Definition: A site located within West Falmouth, MA. Enumerated_Domain_Value_Definition_Source: Producer defined Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Herring River Enumerated_Domain_Value_Definition: A site located within the Cape Cod National Seashore in Wellfleet, MA. Enumerated_Domain_Value_Definition_Source: Producer defined Attribute: Attribute_Label: status Attribute_Definition: Hydrological management status of the sampling location Attribute_Definition_Source: Producer Defined Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Unrestricted Enumerated_Domain_Value_Definition: Indicates that the sampling location experiences natural, unrestricted tidal exchange. Enumerated_Domain_Value_Definition_Source: Producer defined Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Impounded Enumerated_Domain_Value_Definition: Indicates that at this sampling location water is retained but tidal exchange is limited or excluded by infrastructure such as dikes, roads, or culverts Enumerated_Domain_Value_Definition_Source: Producer defined Attribute: Attribute_Label: veg_type Attribute_Definition: Dominant vegetation at sampling location Attribute_Definition_Source: Producer Defined Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Phragmites Wetland Enumerated_Domain_Value_Definition: Sampling location is a wetland dominated by Phragmites australis Enumerated_Domain_Value_Definition_Source: Producer defined Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Typha/Schoenoplectus Wetland Enumerated_Domain_Value_Definition: Sampling location is a wetland dominated by Typha lattifolia and Schoenoplectus Enumerated_Domain_Value_Definition_Source: Producer defined Attribute: Attribute_Label: sampling_location_name Attribute_Definition: Sampling location name indicating both the hydrological management and salinity status relative to the geographical site as referenced in the related publication (Sanders-DeMott and others, 2022) Attribute_Definition_Source: Producer Defined Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Unrestricted-High Enumerated_Domain_Value_Definition: Sampling location that experiences natural, unrestricted tidal exchange and is the high salinity plot of the site pair at Sage Lot Pond as referenced in the related publication (Sanders-DeMott and others, 2022) Enumerated_Domain_Value_Definition_Source: Producer defined Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Unrestricted-Low Enumerated_Domain_Value_Definition: Sampling location that experiences natural, unrestricted tidal exchange and is the low salinity plot of the site pair at Sage Lot Pond as referenced in the related publication (Sanders-DeMott and others, 2022) Enumerated_Domain_Value_Definition_Source: Producer defined Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Impounded-FPP Enumerated_Domain_Value_Definition: Sampling location that experiences tidal exchange that is limited or excluded and is located in a Phragamites stand at Flat Pond Enumerated_Domain_Value_Definition_Source: Producer defined Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Impounded-FPTS Enumerated_Domain_Value_Definition: Sampling location that experiences tidal exchange that is limited or excluded and is located in a mixed Typha latifolia and Schoenoplectus stand at Flat Pond Enumerated_Domain_Value_Definition_Source: Producer defined Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Impounded-WH Enumerated_Domain_Value_Definition: Sampling location that experiences tidal exchange that is limited or excluded and is located in Woods Hole Park in Woods Hole, MA Enumerated_Domain_Value_Definition_Source: Producer defined Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Impounded-QMH Enumerated_Domain_Value_Definition: Sampling location that experiences tidal exchange that is limited or excluded and is located on Quaker Meeting House property in West Falmouth, MA Enumerated_Domain_Value_Definition_Source: Producer defined Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Impounded-High Enumerated_Domain_Value_Definition: Sampling location that experiences tidal exchange that is limited or excluded and is the high salinity plot of the site pair at Herring River as referenced in the related publication (Sanders-DeMott and others, 2022) Enumerated_Domain_Value_Definition_Source: Producer defined Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Impounded-Low Enumerated_Domain_Value_Definition: Sampling location that experiences tidal exchange that is limited or excluded and is the low salinity plot of the site pair at Herring River as referenced in the related publication (Sanders-DeMott and others, 2022) Enumerated_Domain_Value_Definition_Source: Producer defined Attribute: Attribute_Label: latitude Attribute_Definition: Latitude decimal degrees north, NAD83 Attribute_Definition_Source: Producer Defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 41.52952 Range_Domain_Maximum: 41.93784 Attribute_Units_of_Measure: decimal degrees Attribute: Attribute_Label: longitude Attribute_Definition: Longitude decimal degrees west, NAD83. The negative value indicates a location in the western hemisphere. Attribute_Definition_Source: Producer Defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -70.67029 Range_Domain_Maximum: -70.05472 Attribute_Units_of_Measure: decimal degrees Attribute: Attribute_Label: air_temp_1m Attribute_Definition: Air temperature recorded at 1 meter height above the sediment surface Attribute_Definition_Source: Producer Defined Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: empty cell Enumerated_Domain_Value_Definition: No Data due to instrument malfunction Enumerated_Domain_Value_Definition_Source: Producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -20.9 Range_Domain_Maximum: 39.0 Attribute_Units_of_Measure: degrees Celsius Attribute: Attribute_Label: soil_temp Attribute_Definition: Soil temperature recorded at 10 cm depth below the sediment surface Attribute_Definition_Source: Producer Defined Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: empty cell Enumerated_Domain_Value_Definition: No Data due to instrument malfunction Enumerated_Domain_Value_Definition_Source: Producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.9 Range_Domain_Maximum: 24.8 Attribute_Units_of_Measure: degrees Celsius Attribute: Attribute_Label: sensor Attribute_Definition: Sensor manufacturer and model Attribute_Definition_Source: Producer Defined Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: HOBO U23-003 Temp/Temp Enumerated_Domain_Value_Definition: Manufacturer and model of sensor used to record both air and soil temperature Enumerated_Domain_Value_Definition_Source: Producer defined Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: HOBO MX2303 Temp/Temp Enumerated_Domain_Value_Definition: Manufacturer and model of sensor used to record both air and soil temperature Enumerated_Domain_Value_Definition_Source: Producer defined Detailed_Description: Entity_Type: Entity_Type_Label: slp_met_2021-2022.csv Entity_Type_Definition: Comma Separated Value (CSV) file containing meteorological data. This dataset has 36069 records. Entity_Type_Definition_Source: Producer Defined Attribute: Attribute_Label: datetime Attribute_Definition: Date and time that sensor measurement was logged in local standard time (UTC - 05:00) in the format yyyy-mm-dd hh:mm:ss. Attribute_Definition_Source: Producer Defined Attribute_Domain_Values: Unrepresentable_Domain: A numeric value representing date and time. Attribute: Attribute_Label: site_name Attribute_Definition: Site of the sampling location Attribute_Definition_Source: Producer Defined Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Sage Lot Pond Enumerated_Domain_Value_Definition: A site located within the Waquoit Bay National Estuarine Research Reserve in Waquoit, MA. Enumerated_Domain_Value_Definition_Source: Producer defined Attribute: Attribute_Label: status Attribute_Definition: Hydrological management status of the sampling location Attribute_Definition_Source: Producer Defined Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Unrestricted Enumerated_Domain_Value_Definition: Indicates that the sampling location experiences natural, unrestricted tidal exchange. Enumerated_Domain_Value_Definition_Source: Producer defined Attribute: Attribute_Label: veg_type Attribute_Definition: Dominant vegetation at sampling location Attribute_Definition_Source: Producer Defined Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Phragmites Wetland Enumerated_Domain_Value_Definition: Sampling location is a wetland dominated by Phragmites australis Enumerated_Domain_Value_Definition_Source: Producer defined Attribute: Attribute_Label: latitude Attribute_Definition: Latitude decimal degrees north, NAD83 Attribute_Definition_Source: Producer Defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 41.55773 Range_Domain_Maximum: 41.55773 Attribute_Units_of_Measure: decimal degrees Attribute: Attribute_Label: longitude Attribute_Definition: Longitude decimal degrees west, NAD83. The negative value indicates a location in the western hemisphere. Attribute_Definition_Source: Producer Defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -70.50443 Range_Domain_Maximum: -70.50443 Attribute_Units_of_Measure: decimal degrees Attribute: Attribute_Label: air_temp_3m Attribute_Definition: Air temperature recorded at 3 meters height above the sediment surface with Onset HOBO Temperature/RH Smart Sensor S-THB-M00x Attribute_Definition_Source: Producer Defined Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: empty cell Enumerated_Domain_Value_Definition: No Data due to instrument malfunction. Enumerated_Domain_Value_Definition_Source: Producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -12.6 Range_Domain_Maximum: 33.9 Attribute_Units_of_Measure: degrees Celsius Attribute: Attribute_Label: RH Attribute_Definition: Relative humidity recorded at 3 meters height above the sediment surface with Onset HOBO Temperature/RH Smart Sensor S-THB-M00x Attribute_Definition_Source: Producer Defined Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: empty cell Enumerated_Domain_Value_Definition: No Data due to instrument malfunction. Enumerated_Domain_Value_Definition_Source: Producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 20.5 Range_Domain_Maximum: 100.0 Attribute_Units_of_Measure: percent Attribute: Attribute_Label: PAR Attribute_Definition: Incoming photosynthetically active radiation (PAR) in micromoles photons per meter squared per second (umol photons m-2 sec-1) recorded at 3 meters height above the sediment surface with Onset HOBO Photosynthetically Active Radiation Smart Sensor S-LIA-M003 Attribute_Definition_Source: Producer Defined Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: empty cell Enumerated_Domain_Value_Definition: No Data due to instrument malfunction. Enumerated_Domain_Value_Definition_Source: Producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1.2 Range_Domain_Maximum: 2511.2 Attribute_Units_of_Measure: umol photons m-2 sec-1 Distribution_Information: Distributor: Contact_Information: Contact_Person_Primary: Contact_Person: ScienceBase Contact_Organization: U.S. Geological Survey Contact_Address: Address_Type: mailing address Address: Denver Federal Center, Building 810, Mail Stop 302 City: Denver State_or_Province: CO Postal_Code: 80225 Country: United States Contact_Voice_Telephone: 1-888-275-8747 Contact_Electronic_Mail_Address: sciencebase@usgs.gov Resource_Description: The dataset contains three CSV files containing the data (chamber_fluxes_2021.csv; air_soil_temp_2021-2022.csv; slp_met_2021-2022.csv), the browse graphic (phragmites_chamber.jpg), and the FGDC CSDGM metadata in XML format. 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_Version_Number: Microsoft Excel Office 365 Format_Information_Content: The data release includes 3 comma separated files, a browse graphic, and the FGDC CSDGM metadata. Transfer_Size: 1 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: https://www.sciencebase.gov/catalog/file/get/629fa3e2d34ec53d276fd537 Network_Resource_Name: https://www.sciencebase.gov/catalog/item/629fa3e2d34ec53d276fd537 Network_Resource_Name: https://doi.org/10.5066/P9RRL3T0 Access_Instructions: Access instructions: The first link downloads all the files associated with the dataset, the second link goes to the landing page of the dataset, and the third link goes to the main page of the data release. Fees: None Technical_Prerequisites: The data release includes 3 comma-delimited text files. The user must have software capable of opening the text file and reading the data formats. Metadata_Reference_Information: Metadata_Date: 20220615 Metadata_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Rebecca Sanders-Demott Contact_Organization: U.S. Geological Survey, NORTHEAST REGION Contact_Address: Address_Type: mailing address Address: 384 Woods Hole Road City: Woods Hole State_or_Province: MA Postal_Code: 02543 Country: US Contact_Voice_Telephone: 508-548-8700 x2255 Contact_Electronic_Mail_Address: whsc_data_contact@usgs.gov Contact_Instructions: The metadata contact email address is a generic address in the event the person is no longer with USGS. Metadata_Standard_Name: Content Standard for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998