gov.noaa.nodc:0229071 eng utf8 dataset NOAA National Centers for Environmental Information ncei.info@noaa.gov https://www.ncei.noaa.gov/contact HTTPS NOAA Contact Information Information for contacts at NCEI. information custodian 2026-04-22T13:34:52Z ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) pH, WATER TEMPERATURE, and others in Coastal Waters of Texas from 2018-10-25 to 2020-03-16 (NCEI Accession 0229071) 2021-06-09 publication 2021-04-12 creation NOAA National Centers for Environmental Information gov.noaa.nodc:0229071 NCEI Archive Management System 0229071 NOAA National Centers for Environmental Information ncei.info@noaa.gov https://www.ncei.noaa.gov/contact HTTPS NCEI Contact Information Information for contacts at NCEI. information publisher Texas A&M University - Corpus Christi (TAMU-CC) https://www.tamucc.edu/ HTTPS Texas A&M University - Corpus Christi (TAMU-CC) website Institution web page information resourceProvider Lydia Hayes Texas A&M University - Corpus Christi (TAMU-CC) lydia.hayes@tamucc.edu https://www.tamucc.edu/ HTTPS Texas A&M University - Corpus Christi (TAMU-CC) website Institution web page information collaborator Lauren Williams Texas A&M University - Corpus Christi (TAMU-CC) https://www.tamucc.edu/ HTTPS Texas A&M University - Corpus Christi (TAMU-CC) website Institution web page information principalInvestigator Lin Zhang Texas A&M University - Corpus Christi (TAMU-CC) https://www.tamucc.edu/ HTTPS Texas A&M University - Corpus Christi (TAMU-CC) website Institution web page information principalInvestigator Hayes, Lydia Texas A&M University Corpus Christi https://www.tamucc.edu/ HTTPS Texas A&M University - Corpus Christi (TAMU-CC) website Institution web page information author Williams, Lauren Texas A&M University Corpus Christi https://www.tamucc.edu/ HTTPS Texas A&M University - Corpus Christi (TAMU-CC) website Institution web page information author Zhang, Lin Texas A&M University Corpus Christi https://www.tamucc.edu/ HTTPS Texas A&M University - Corpus Christi (TAMU-CC) website Institution web page information author tableDigital This dataset includes a variety of environmental variables from surface water of five wetland sites (three natural and two restored), and the effluent of three wastewater treatment plants. Potential denitrification rates were also measured in the surface sediments of the five wetlands from the Texas Coastal Bend. The data was collected over a course of 18 months from late 2018 to early 2020. The variables include pH, water temperature (°C), salinity (psu), dissolved oxygen (mg/L), nitrate, nitrite, and ammonium concentrations (µM), d15N-NH4, d15N-NO3, d15N-NO2 (per mille), dissolved N2O, CO2, and CH4 (µM), and potential denitrification rates from wetland sediments (kg N·ha^-2·yr^-1). This dataset is available to the public for a wide variety of uses including scientific research and analysis. Texas General Land Office Coastal Management Program completed historicalArchive NOAA National Centers for Environmental Information ncei.info@noaa.gov https://www.ncei.noaa.gov/contact HTTPS NCEI Contact Information Information for contacts at NCEI. information pointOfContact asNeeded https://www.ncei.noaa.gov/access/metadata/landing-page/bin/gfx?id=gov.noaa.nodc:0229071 Preview graphic PNG 0229071 NCEI ACCESSION NUMBER 2021-03-22 publication DISSOLVED OXYGEN pH SALINITY - SURFACE WATER WATER TEMPERATURE theme NODC DATA TYPES THESAURUS conductivity sensor nutrient autoanalyzer pH sensor temperature probe instrument NODC INSTRUMENT TYPES THESAURUS in situ laboratory analyses theme NODC OBSERVATION TYPES THESAURUS Texas A&M University - Corpus Christi dataCentre NODC SUBMITTING INSTITUTION NAMES THESAURUS Coastal Waters of Texas place NODC SEA AREA NAMES THESAURUS oceanography theme WMO_CategoryCode 2012-09-15 publication Assessment and Economic Valuation of Nitrogen Mitigation in Texas Coastal Bend Restored Marsh project Provider Project Names EARTH SCIENCE > CLIMATE INDICATORS > ATMOSPHERIC/OCEAN INDICATORS > SURFACE SALINITY EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > OXYGEN EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > PH EARTH SCIENCE > OCEANS > OCEAN TEMPERATURE > WATER TEMPERATURE EARTH SCIENCE > OCEANS > SALINITY/DENSITY > SALINITY theme Global Change Master Directory (GCMD) Science Keywords 2026 revision 24 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) Greenbelt MD https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords HTTPS GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2025. GCMD Keywords, Version 21. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords information custodian Ammonium Concentration Nitrate Concentration Nitrite Concentration Potential Denitrification Rate dissolve methane dissolved carbon dioxide dissolved nitrous oxide δ15N-NH4 δ15N-NO2 δ15N-NO3 theme Provider Keywords AUTOANALYZER > AUTOANALYZER CONDUCTIVITY METERS > CONDUCTIVITY METERS PH METERS > PH METERS TEMPERATURE PROBES > TEMPERATURE PROBES instrument Global Change Master Directory (GCMD) Instrument Keywords 2026 revision 24 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) Greenbelt MD https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords HTTPS GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2025. GCMD Keywords, Version 21. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords information custodian Gas Chromatograph Purge and Trap IRMS dissolved oxygen probe instrument Provider Instruments OCEAN > ATLANTIC OCEAN > NORTH ATLANTIC OCEAN > GULF OF AMERICA OCEAN > ATLANTIC OCEAN > NORTH ATLANTIC OCEAN > GULF OF MEXICO place Global Change Master Directory (GCMD) Location Keywords 2026 revision 24 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) Greenbelt MD https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords HTTPS GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2025. GCMD Keywords, Version 21. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords information custodian B2CUPW Send2NCEI Submission Package ID accessLevel: public otherRestrictions Cite as: Hayes, Lydia; Williams, Lauren; Zhang, Lin (2021). pH, WATER TEMPERATURE, and others in Coastal Waters of Texas from 2018-10-25 to 2020-03-16 (NCEI Accession 0229071). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://www.ncei.noaa.gov/archive/accession/0229071. Accessed [date]. Distribution liability: NOAA and NCEI make no warranty, expressed or implied, regarding these data, nor does the fact of distribution constitute such a warranty. NOAA and NCEI cannot assume liability for any damages caused by any errors or omissions in these data. If appropriate, NCEI can only certify that the data it distributes are an authentic copy of the records that were accepted for inclusion in the NCEI archives. otherRestrictions Use liability: NOAA and NCEI cannot provide any warranty as to the accuracy, reliability, or completeness of furnished data. Users assume responsibility to determine the usability of these data. The user is responsible for the results of any application of this data for other than its intended purpose. eng; USA utf8 environment oceans -97.4 -97.2 27.8 28.1 2018-10-25 2020-03-16 NOAA National Centers for Environmental Information +1-301-713-3277 ncei.info@noaa.gov pointOfContact In most cases, electronic downloads of the data are free. However, fees may apply for custom orders, data certifications, copies of analog materials, and data distribution on physical media. Contact NCEI for other distribution options and instructions. Originator data format 0.284 https://www.ncei.noaa.gov/archive/accession/0229071 HTTPS Web browser NCEI Dataset Landing Page Navigate directly to the URL for a descriptive web page with download links. information https://www.ncei.noaa.gov/archive/accession/oas/229071 HTTPS Web browser Descriptive Information Navigate directly to the URL for a descriptive web page with download links. information https://www.ncei.noaa.gov/archive/accession/download/229071 HTTPS Web browser HTTPS Navigate directly to the URL for data access and direct download. download ftp://ftp-oceans.ncei.noaa.gov/nodc/archive/arc0180/0229071/ FTP Any FTP client FTP These data are available through the File Transfer Protocol (FTP). FTP is no longer supported by most internet browsers. You may copy and paste the FTP link to the data into an FTP client (e.g., FileZilla or WinSCP). download dataset NCEI Accession 0229071 v1.1 was published. 2021-06-09T15:25:09Z NCEI Accession 0229071 v1.1 publication https://www.ncei.noaa.gov/archive/accession/0229071/1.1 HTTPS NCEI Accession 0229071 v1.1 published 2021-06-09T15:25:09Z download dataset Parameter or Variable: pH (measured); Units: pH; Observation Category: in situ; Sampling Instrument: pH sensors Parameter or Variable: WATER TEMPERATURE (measured); Units: degrees Celsius; Observation Category: in situ; Sampling Instrument: temperature probe Parameter or Variable: SALINITY - SURFACE WATER (measured); Units: psu; Observation Category: in situ; Sampling Instrument: salinity/ conductivity meter Parameter or Variable: DISSOLVED OXYGEN (measured); Units: mg/L; Observation Category: in situ; Sampling Instrument: dissolved oxygen probe Parameter or Variable: Nitrate Concentration (measured); Units: µM; Observation Category: laboratory analysis; Sampling Instrument: nutrient autoanalyzer; Sampling and Analyzing Method: SEAL AQ300 autosampler uses method EPA-126-D Rev to measure NO3+NO2, and then measured NO2 is subtracted to yield NO3 concentration. Parameter or Variable: Nitrite Concentration (measured); Units: µM; Observation Category: laboratory analysis; Sampling Instrument: nutrient autoanalyzer; Sampling and Analyzing Method: SEAL AQ300 uses method EPA-115-D Rev A to measure NO2 concentration Parameter or Variable: Ammonium Concentration (measured); Units: µM; Observation Category: laboratory analysis; Sampling Instrument: nutrient autoanalyzer; Sampling and Analyzing Method: SEAL AQ300 uses method EPA-148-D Rev 0 to measure ammonium Parameter or Variable: dissolved nitrous oxide (measured); Units: µM; Observation Category: laboratory analysis; Sampling Instrument: gas chromatograph; Sampling and Analyzing Method: Vacuum evacuated serum bottles containing dissolved gas samples were injected with helium to balance, 2 mL of headspace gas from the vial were injected into the GC. Dissolved gas concentrations were then calculated using their solubility constants, the analytical temperature and pressure, and calibration curves derived from standard gas mixtures (Hudson 2004; Osburn et al., 2014; Helton et al., 2014; Brazelton et al., 2017). Parameter or Variable: dissolved carbon dioxide (measured); Units: µM; Observation Category: laboratory analysis; Sampling Instrument: gas chromatograph; Sampling and Analyzing Method: Vacuum evacuated serum bottles containing dissolved gas samples were injected with helium to balance, 2 mL of headspace gas from the vial were injected into the GC. Dissolved gas concentrations were then calculated using their solubility constants, the analytical temperature and pressure, and calibration curves derived from standard gas mixtures (Hudson 2004; Osburn et al., 2014; Helton et al., 2014; Brazelton et al., 2017). Parameter or Variable: dissolve methane (measured); Units: µM; Observation Category: laboratory analysis; Sampling Instrument: gas chromatograph; Sampling and Analyzing Method: Vacuum evacuated serum bottles containing dissolved gas samples were injected with helium to balance, 2 mL of headspace gas from the vial were injected into the GC. Dissolved gas concentrations were then calculated using their solubility constants, the analytical temperature and pressure, and calibration curves derived from standard gas mixtures (Hudson 2004; Osburn et al., 2014; Helton et al., 2014; Brazelton et al., 2017). Parameter or Variable: δ15N-NH4 (measured); Units: per mille; Observation Category: laboratory analysis; Sampling Instrument: Purge and Trap IRMS; Sampling and Analyzing Method: NH4 isotope samples are prepared for analysis using the hypobromite oxidation method (Zhang et al., 2007) to oxidize to NO2, and then are reduced to N2O using the azide method (McIlvin and Altabet 2005) and analyzed on PT-IRMS. Parameter or Variable: δ15N-NO3 (measured); Units: per mille; Observation Category: laboratory analysis; Sampling Instrument: Purge and Trap IRMS; Sampling and Analyzing Method: NO3 isotope samples are prepared for analysis by reducing NO3 to NO2 using Cd reduction, and then are reduced to N2O using the azide method (McIlvin and Altabet 2005) and analyzed on PT-IRMS. Parameter or Variable: δ15N-NO2 (measured); Units: per mille; Observation Category: laboratory analysis; Sampling Instrument: Purge and Trap IRMS; Sampling and Analyzing Method: NO2 isotope samples are reduced to N2O using the azide method (McIlvin and Altabet 2005) and analyzed on PT-IRMS. Parameter or Variable: Potential Denitrification Rate (calculated); Units: kg N·ha^-2·yr^-1; Observation Category: laboratory analysis; Sampling Instrument: Gas Chromatograph; Sampling and Analyzing Method: Potential denitrification was measured using the acetylene blocking method (Groffman and Tiedje 1989). Bulk sediments in a slurry were mixed in a serum bottle and sealed, then treated with the addition of wastewater high in nitrate and acetylene gas. Headspace was measured on the GC fixed with an ECD using 2 mL injections. The production of N2O was measured once per hour for six hours. Denitrification rates were calculated by the rate of N2O accumulation over time (Groffman and Tiedje 1989). Rates were corrected using Henry’s Law Constant for N2O for dissolved gas in the aqueous layer in the serum bottle (Sander 1999; Lindau et al., 2008). The rate of denitrification was then converted to kg N·ha-2·yr-1 using the equation from Rolston (1986) and Lindau et al. (2008) asNeeded Metadata are developed, maintained and distributed by NCEI. Updates are performed as needed to maintain currentness. NOAA National Centers for Environmental Information custodian conductivity sensor conductivity sensor OMEGA non-contact conductivity sensor CDCN-108 or Honeywell DirectLine DL423 Sensor Module, for example Water conductivity sensors are used to measure how well a solution conducts an electrical current. nutrient autoanalyzer nutrient autoanalyzer Laboratory Instrument Nutrient Autoanalyzer is a generic term describing an automated flow-thru system used to conduct analyses of several different nutrients (nitrate, ammonium, orthophosphate, and silicate) simultaneously from a seawater sample. For example: SEAL AutoAnalyzer 3 HR Continuous Segmented Flow Analyzer pH sensor pH sensor generic meter used to measure pH Any of a class of instruments used to quantify pH in a water or other type of sample. temperature probe temperature probe For example, OMEGA temperature probe PR-11-2-100-1/8-6-e Vaisala HUMICAP® Humidity and Temperature Probe HMP155