Metadata: Identification_Information: 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: 20220427 Title: Eddy covariance fluxes of carbon dioxide and methane from the Herring River in Wellfleet, MA (ver 2.0, June 2022) Edition: 2.0 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/625880b7d34e21f82770a19b 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: 2 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: Eddy covariance measurements of net ecosystem exchange of carbon dioxide and methane were collected continuously at half-hourly intervals to assess the magnitude and drivers of carbon exchange in an impounded coastal wetland. Data were also collected to inform predictive models of carbon fluxes across coastal wetlands of varying salinity and to facilitate National Park Service restoration planning and future blue carbon project assessments. Supplemental_Information: See the following field activities for additional information: https://cmgds.marine.usgs.gov/fan_info.php?fan=2020-019-FA https://cmgds.marine.usgs.gov/fan_info.php?fan=2021-026-FA https://cmgds.marine.usgs.gov/fan_info.php?fan=2022-011-FA Continuous data on water table height, salinity, and water temperature at the eddy covariance site included here is available in O'Keefe Suttles and others, 2022 and continuous soil and air temperature at this site is included in this data release in air_soil_temp.csv (for May 2020-May 2021) and air_soil_temp_2021-2022.csv (for May 2021-May 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. Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 20200521 Ending_Date: 20220519 Currentness_Reference: Ground condition. These dates bracket the period of monthly sampling when the measurements were made. Status: Progress: Planned Maintenance_and_Update_Frequency: As needed Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -70.0555000 East_Bounding_Coordinate: -70.0550000 North_Bounding_Coordinate: 41.9380000 South_Bounding_Coordinate: 41.9375000 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: none Theme_Keyword: brackish marsh Theme_Keyword: carbon dioxide flux Theme_Keyword: methane flux Theme_Keyword: net ecosystem exchange Theme_Keyword: eddy covariance Theme: Theme_Keyword_Thesaurus: USGS Metadata Identifier Theme_Keyword: USGS:625880b7d34e21f82770a19b Place: Place_Keyword_Thesaurus: Geographic Names Information System (GNIS) Place_Keyword: Cape Cod (606914) Place_Keyword: Herring River (616776) Place_Keyword: Barnstable County (606927) Place_Keyword: Cape Cod National Seashore (606900) Place_Keyword: Commonwealth of Massachusetts (606926) 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/625880b7d34e21f82770a19b?name=phramites_eddycovariance.jpg Browse_Graphic_File_Description: Browse graphic is a photograph of a Phragmites wetland in the Herring River estuary in Wellfleet, 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 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 eddy covariance data 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-7200A Open Path CO2 /H2O Gas Analyzer has an accuracy within 1 percent of reading for carbon dioxide (CO2) and within 2 percent of reading for water (H2O) vapor. The LI-7700 Open Path CH4 Gas Analyzer has a resolution of 5 ppb at 10 Hz and 2000 ppb methane (CH4). The instrument calibration was checked using laboratory calibration gases prior to field measurements in spring 2020 and approximately every three months in the field using calibration gases. Fluxes were computed using EddyPro software (Version 7.0.6) and additional details on QA/QC are outlined in the Process Step 1. Manufacturer's specifications for the HOBO Temperature/RH Smart Sensor (S-THB-M00x) are accuracy of 0.2 degrees C over 0 degrees to 50 degrees C and +/- 2.5 percent from 10 percent to 90 percent RH (typical), to a maximum of +/- 3.5 percent. Accuracy of the PAR sensor +/- 5 micromoles per meter squared per second and resolution of the photosynthetically active radiation (PAR) sensor is 2.5 micromoles per meter squared per second. Relative humidity (RH) sensor was enclosed within a solar radiation shield and deployed on a mast with other meteorological sensors. 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, poor data quality. Description of data filtering in included 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 at the base of the tower by Trimble Real-Time Kinematic (RTK) GPS. Recorded Horizontal Dilution of Position (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 elevation was measured at the base of the tower by Trimble Real-Time Kinematic (RTK) GPS. 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: An eddy covariance system was originally installed at the Herring River site in 2017 (2017-2020 data not available at time of this publication) to collect ecosystem scale measurements of CO2 and CH4 fluxes across the land surface (tower is part of the Ameriflux network code US-HRP). A tripod tower was equipped with a LI-7500A open path CO2/H2O analyzer (LI-COR, Inc., Lincoln, NE, USA) and a LI-7700 open path CH4 analyzer (LI-COR, Inc., Lincoln, NE, USA), along with a CSAT-3 3D sonic anemometer (Campbell Scientific, Logan, UT, USA). Instruments are deployed at 4.4 m height above the ground surface, along with a suite of meteorological sensors that measure air temperature and humidity (Onset HOBO Temperature/RH Smart Sensor (S-THB-M00x), Bourne, MA, USA), incoming photosynthetically active radiation (PAR; Onset HOBO Photosynthetically Active Radiation Smart Sensor S-LIA-M003, Bourne, MA, USA), and precipitation (Onset HOBO Rain Gauge Smart Sensor S-Rgx-M002, Bourne, MA, USA). Anemometer and gas analyzer data were collected at a frequency of 10 Hz and ancillary meteorological data were collected every five minutes. Data were downloaded every 3-4 weeks as compressed .ghg files from the anemometer and gas analyzers and as .csv files for the ancillary meterological sensors. Process_Date: 20210601 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: Half hourly fluxes of CO2 and CH4 were computed from the covariation of high frequency vertical wind direction and CO2 and CH4 concentration using the EddyPro software package (Version 7.0.6, LICOR, Inc., Lincoln, NE, USA), as well as latent heat exchange and friction velocity. Within software specifications, raw high frequency data were despiked and a double coordinate rotation was applied to anemometer measurements along with a flux correction for the effects of humidity on sonic air temperature, high-frequency and low-frequency spectral attenuations, and air density fluctuations coupled to instrument-related sensible heat flux in the winter. Computed fluxes were exported to .csv files. We report fluxes of carbon dioxide as net ecosystem exchange (NEE), where negative values for both NEE and CH4 indicate net uptake of gas by the land surface and positive values indicate net loss of gas to the atmosphere. We removed low quality measurements (ranked as less than or equal to 1 quality flag per EddyPro based on Mauder and Foken, 2006), measurements made during and immediately following precipitation events, and any measurement collected during site maintenance or known instrument malfunction. We also removed measurements made during low‐turbulence conditions with potential advective losses and when friction velocity, ustar, was below a site specific threshold of 0.118 meters per second calculated in the R-based software package REddyProc (Version 1.2.2, Wutzler and others 2018). Instrument malfunction caused a gap in some meteorological data from late-January through mid-April 2021 and are represented as blanks in the data. The .csv files containing the meterological data and the .csv file containing the computed fluxes were matched by datetime and merged in R. Wutzler, T., Lucas-Moffat, A., Migliavacca, M., Knauer, J., Sickel, K., Šigut, L., Menzer, O., and Reichstein, M., 2018, Basic and extensible post-processing of eddy covariance flux data with REddyProc: Biogeosciences Discussions, February, 1–39. https://doi.org/10.5194/bg-2018-56. Mauder, M., and Foken, T., 2006, Impact of post-field data processing on eddy covariance flux estimates and energy balance closure: Meteorologische Zeitschrift, vol. 15, p. 597-609 Process_Date: 20210601 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: Latitude, longitude and elevation of the eddy covariance tower 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 file of calculated fluxes via R. Process_Date: 20200915 Process_Step: Process_Description: Measurements were continued as described above from May 2021 to May 2022. All new data were processed as described above and 17308 records were appended to the original dataset (17568 records) bringing the total dataset to 34876 records and revising the end date of the dataset from May 23, 2021 to May 18, 2022. In addition, newly available data was added to blank columns in the last 71 rows of the original dataset, but the original dataset is otherwise unchanged and no existing data values were modified. The metadata was updated to reflect the new ranges of values. Process_Date: 20220601 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 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", "status", and "veg_type" for details. Direct_Spatial_Reference_Method: Point Point_and_Vector_Object_Information: SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: Point Point_and_Vector_Object_Count: 34876 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: phragmites_eddycovariance.csv Entity_Type_Definition: Comma Separated Value (CSV) file containing half hourly data on flux of CO2, CH4, and associated meteorological parameters. 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: Numeric value representing the 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: 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: 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: Attribute_Label: latitude Attribute_Definition: Latitude decimal degrees north, NAD83 Attribute_Definition_Source: Producer Defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 41.93804 Range_Domain_Maximum: 41.93804 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: -70.0553 Range_Domain_Maximum: -70.0553 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: 0.33 Range_Domain_Maximum: 0.33 Attribute_Units_of_Measure: meters Attribute: Attribute_Label: NEE Attribute_Definition: Net ecosystem exchange of carbon dioxide (also referred to as carbon dioxide flux) 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: Enumerated_Domain: Enumerated_Domain_Value: << empty cell >> Enumerated_Domain_Value_Definition: No Data due to instrument malfunction or poor quality measurement according to quality flag as defined in process step Enumerated_Domain_Value_Definition_Source: Producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -67.5839 Range_Domain_Maximum: 74.5949 Attribute_Units_of_Measure: umol CO2 m-2 sec-1 Attribute: Attribute_Label: qc_NEE_flux Attribute_Definition: Quality control flag for calculated net ecosystem exchange 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, based on Mauder and Foken, 2006 Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 0 Enumerated_Domain_Value_Definition: best quality calculated flux Enumerated_Domain_Value_Definition_Source: Producer defined, based on Mauder and Foken, 2006 Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 1 Enumerated_Domain_Value_Definition: fluxes suitable for general analysis such as annual budgets Enumerated_Domain_Value_Definition_Source: Producer defined, based on Mauder and Foken, 2006 Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 2 Enumerated_Domain_Value_Definition: fluxes that should be discarded from the results dataset Enumerated_Domain_Value_Definition_Source: Producer defined, based on Mauder and Foken, 2006 Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 3 Enumerated_Domain_Value_Definition: fluxes that should be discarded from dataset due to known maintenance, instrument malfunction, or rain event Enumerated_Domain_Value_Definition_Source: Producer defined Attribute: Attribute_Label: CH4_flux Attribute_Definition: Ecosystem flux of methane 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: Enumerated_Domain: Enumerated_Domain_Value: << empty cell >> Enumerated_Domain_Value_Definition: No Data due to instrument malfunction or poor quality measurement according to quality flag as defined in process step Enumerated_Domain_Value_Definition_Source: Producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -0.3043 Range_Domain_Maximum: 0.4714 Attribute_Units_of_Measure: nmol CH4 m-2 sec-1 Attribute: Attribute_Label: qc_CH4_flux Attribute_Definition: Quality control flag for calculated methane flux. 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: Enumerated_Domain: Enumerated_Domain_Value: 0 Enumerated_Domain_Value_Definition: best quality calculated flux Enumerated_Domain_Value_Definition_Source: Producer defined, based on Mauder and Foken, 2006 Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 1 Enumerated_Domain_Value_Definition: fluxes suitable for general analysis such as annual budgets Enumerated_Domain_Value_Definition_Source: Producer defined, based on Mauder and Foken, 2006 Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 2 Enumerated_Domain_Value_Definition: fluxes that should be discarded from the results dataset Enumerated_Domain_Value_Definition_Source: Producer defined, based on Mauder and Foken, 2006 Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 3 Enumerated_Domain_Value_Definition: fluxes that should be discarded from dataset due to known maintenance, instrument malfunction, or rain event Enumerated_Domain_Value_Definition_Source: Producer defined Attribute: Attribute_Label: LE Attribute_Definition: Latent heat exchange between the surface and the atmosphere in Watts per meter squared (W m-2) 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 or poor quality measurement according to quality flag as defined in process step Enumerated_Domain_Value_Definition_Source: Producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -188.260 Range_Domain_Maximum: 460.703 Attribute_Units_of_Measure: W m-2 Attribute: Attribute_Label: qc_LE Attribute_Definition: Quality control flag for calculated latent heat exchange between the surface and the atmosphere 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, based on Mauder and Foken, 2006 Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 0 Enumerated_Domain_Value_Definition: best quality calculated flux Enumerated_Domain_Value_Definition_Source: Producer defined Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 1 Enumerated_Domain_Value_Definition: fluxes suitable for general analysis such as annual budgets Enumerated_Domain_Value_Definition_Source: Producer defined, based on Mauder and Foken, 2006 Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 2 Enumerated_Domain_Value_Definition: fluxes that should be discarded from the results dataset Enumerated_Domain_Value_Definition_Source: Producer defined, based on Mauder and Foken, 2006 Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 3 Enumerated_Domain_Value_Definition: producer defined fluxes that should be discarded from dataset due to known maintenance, instrument malfunction, or rain event Enumerated_Domain_Value_Definition_Source: Producer defined Attribute: Attribute_Label: ustar Attribute_Definition: Friction velocity in meters per second 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 or poor quality measurement according to quality flag as defined in process step Enumerated_Domain_Value_Definition_Source: Producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.0103 Range_Domain_Maximum: 4.1499 Attribute_Units_of_Measure: m sec-1 Attribute: Attribute_Label: air_temp_3m Attribute_Definition: Air temperature recorded at 3m 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: -11.6 Range_Domain_Maximum: 34.3 Attribute_Units_of_Measure: degrees Celcius Attribute: Attribute_Label: RH Attribute_Definition: Relative humidity recorded at 3m 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: 26.2 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 meter 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 Enumerated_Domain_Value_Definition_Source: Producer defined Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1.2 Range_Domain_Maximum: 2197.9 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 one CSV file containing the data (phragmites_eddycovariance_ver2.csv), the browse graphic (phramites_eddycovariance.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 1 comma separated file, 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/625880b7d34e21f82770a19b Network_Resource_Name: https://www.sciencebase.gov/catalog/item/625880b7d34e21f82770a19b 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 dataset includes a comma-delimited text file. 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: Northeast Region: WOODS HOLE COASTAL AND MARINE SCIENCE CENTER 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