gov.noaa.nodc:0207133 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 2026-05-04T13:08:15Z ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) Photochemical degradation of organic carbon in a eutrophic, semiarid estuary (Baffin Bay, Texas) from 2017-08-11 to 2017-10-25 (NCEI Accession 0207133) 2019-11-19 publication 2019-11-18 creation International DOI Foundation (IDF) 10.25921/n1zz-qg34 NOAA National Centers for Environmental Information gov.noaa.nodc:0207133 NCEI Archive Management System 0207133 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 Hongjie Wang Texas A&M University - Corpus Christi (TAMU-CC) hwangde@udel.edu https://www.tamucc.edu/ HTTPS Texas A&M University - Corpus Christi (TAMU-CC) website Institution web page information resourceProvider 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 Hongjie Wang Texas A&M University - Corpus Christi (TAMU-CC) hwangde@udel.edu https://www.tamucc.edu/ HTTPS Texas A&M University - Corpus Christi (TAMU-CC) website Institution web page information principalInvestigator Wang, Hongjie 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 Hu, Xinping 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 Wetz, Michael S. Harte Research Institute for Gulf of Mexico Studies https://www.harteresearch.org/ HTTPS Harte Research Institute for Gulf of Mexico Studies (HRI) website Institution web page information author Hayes, Kenneth 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 Lu, Kaijun Marine Science Institute, University of Texas at Austin http://www.utmsi.utexas.edu HTTP UT Austin Marine Science Institute website Institution web page information author 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 contributor tableDigital The effect of photochemical degradation on the carbon cycle in a eutrophic, semiarid estuary (Baffin Bay, Texas) was investigated using closed-system incubations. During this study, we collected eight time series of dissolved inorganic carbon, and their stable carbon isotope data in closed-system experiments. Stable carbon isotope of dissolved organic carbon was collected at the beginning and the end of each incubation. Chlorophyll a was only measured at the beginning of each incubation. Photochemical production rate and stable carbon isotope composition of photochemical degraded DOC can be calculated. Photochemical degradation of dissolved organic carbon (DOC) is considered as an important DOC sink in the aquatic environments, and previous studies revealed that photochemical reactions enrich the heavy carbon isotope (13C) in the residual DOC pool. To date, few studies have examined the significance of photochemical degradation in subtropical estuaries, particularly those subject to eutrophication and high DOC levels. This study fills in the knowledge gap by measuring the photomineralization rates and the source of photoreactive organic carbon. We found that photochemical remineralization plays an important role in not only removing DOC, but also shifting the stable isotopic composition of residual DOC to more 13C-depleted, contrary to findings in other coastal and open ocean environments. Funding Agency: Texas Sea Grant College 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:0207133 Preview graphic PNG 0207133 NCEI ACCESSION NUMBER 2019-11-08 publication CHLOROPHYLL A DELTA CARBON-13 DEPTH - SENSOR DISSOLVED INORGANIC CARBON (DIC) DISSOLVED ORGANIC CARBON SALINITY theme NODC DATA TYPES THESAURUS multi-parameter water quality sensor instrument NODC INSTRUMENT TYPES THESAURUS in situ laboratory analyses theme NODC OBSERVATION TYPES THESAURUS Texas A&M University - Corpus Christi dataCentre NODC COLLECTING INSTITUTION NAMES THESAURUS Texas A&M University - Corpus Christi dataCentre NODC SUBMITTING INSTITUTION NAMES THESAURUS Coastal Waters of Texas Gulf of Mexico place NODC SEA AREA NAMES THESAURUS oceanography theme WMO_CategoryCode 2012-09-15 publication Grants-in-Aid award project Provider Project Names EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > CHLOROPHYLL EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > INORGANIC CARBON EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > ORGANIC CARBON 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 DIC change DIC-C13 DOC-C13 d13Cocdegredated theme Provider Keywords 15 mL syringe from 1L quartz bottle 50 mL syringe 50 mL syringe from 1 L quartz bottle Calculate from DIC concentration change Calculated from DIC and stable carbon isotope of DIC 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 Baffin Bay, Texas place Provider Place Names F5726T Send2NCEI Submission Package ID accessLevel: public otherRestrictions Cite as: Wang, Hongjie; Hu, Xinping; Wetz, Michael S.; Hayes, Kenneth; Lu, Kaijun (2019). Photochemical degradation of organic carbon in a eutrophic, semiarid estuary (Baffin Bay, Texas) from 2017-08-11 to 2017-10-25 (NCEI Accession 0207133). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.25921/n1zz-qg34. 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. Wang, H., Hu, X., Wetz, M. S., Hayes, K. C., & Lu, K. (2020). Photomineralization of organic carbon in a eutrophic, semiarid estuary. Limnology and Oceanography Letters, 5(3), 246–253. https://doi.org/10.1002/lol2.10146 2020-01-28 publication International DOI Foundation (IDF) https://doi.org/10.1002/lol2.10146 https://doi.org/10.1002/lol2.10146 HTTPS https://doi.org/10.1002/lol2.10146 related journal article information Wang, Hongjie Department of Physical and Environmental Sciences Texas A&M University Corpus Christi Texas author Hu, Xinping Department of Physical and Environmental Sciences Texas A&M University Corpus Christi Texas author Wetz, Michael S. Department of Life Sciences Texas A&M University Corpus Christi Texas author Hayes, Kenneth C. Department of Life Sciences Texas A&M University Corpus Christi Texas author Lu, Kaijun Marine Science Institute University of Texas at Austin Port Aransas Texas author Wiley publisher documentDigital Limnol Oceanogr Letters 5(3) ISSN 2378-2242, ISSN 2378-2242, pp. 246-253 crossReference sciencePaper eng; USA utf8 environment oceans -97.62486667 -97.4943 27.26561667 27.27725 2017-08-11 2017-10-25 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. Excel 0.336 https://doi.org/10.25921/n1zz-qg34 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/207133 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/207133 HTTPS Web browser HTTPS Navigate directly to the URL for data access and direct download. download ftp://ftp-oceans.ncei.noaa.gov/nodc/archive/arc0149/0207133/ 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 0207133 v1.1 was published. 2019-11-19T19:58:20Z NCEI Accession 0207133 v1.1 publication https://www.ncei.noaa.gov/archive/accession/0207133/1.1 HTTPS NCEI Accession 0207133 v1.1 published 2019-11-19T19:58:20Z download dataset Parameter or Variable: DISSOLVED INORGANIC CARBON (DIC) (measured); Units: micromole/liter; Observation Category: laboratory analysis; Sampling Instrument: 15 mL syringe from 1L quartz bottle; Sampling and Analyzing Method: Near-surface (<0.5 m) water samples were collected from two stations along the main channel of Baffin Bay (BB3 and BB6 in Fig. 1) on August 11, 2017. Both near-surface and near-bottom (<0.5 m above the sediment) water samples were collected again at these two stations on September 18, 2017. For the August 2017 experiment, both filtered (through pre-combusted Whatman GF/F filters, pore size=0.7 µm) and whole water were distributed into ground-neck 1000-mL quartz bottles. Only filtered water was used in the September 2017 experiment. There was no duplicate bottle for all incubations. Microbial activity in all incubating bottles was stopped by adding 400 µL saturated HgCl2 solution, and the bottles were then closed and exposed to natural sunlight outdoors. The bottle stoppers were secured with Parafilm® and placed in a plastic tray (89.9 cm ×42.5 cm×14.9 cm) filled with tap water. The water level in the tray was maintained near the bottle neck, which was about 14.5 cm height. The water temperature was purely controlled by air temperature (25°C~30°C). Aliquots of water samples (~12 mL) were extracted every 4-5 days using syringes from the 1000 mL quartz bottles for DIC analyses. Care was taken to minimize the opening time of bottle stoppers during sample extraction. DIC samples were stored in 4 mL borosilicate vials, which were tightly closed using phenolic screw caps with PTFE-faced rubber liner. DIC analyses were finished in two weeks after the experiment. The analytical methods for DIC was the same as those used in Wang et al. (2018). Briefly, DIC was measured with an infrared CO2 detector-based DIC analyzer (AS-C3 Apollo SciTech Inc.). Certified Reference Materials from A. G. Dickson, Scripps Institution of Oceanography were used as an independent data quality control. The precisions for DIC was within 2 µmol L-1 (±0.1%) (Chen et al. 2015). Chen, B., W.-J. Cai, and L. Chen. 2015. The marine carbonate system of the Arctic Ocean: Assessment of internal consistency and sampling considerations, summer 2010. Marine Chemistry 176: 174-188. Parameter or Variable: DIC-C13 (measured); Units: per mille; Observation Category: laboratory analysis; Sampling Instrument: 15 mL syringe from 1L quartz bottle; Sampling and Analyzing Method: Near-surface (<0.5 m) water samples were collected from two stations along the main channel of Baffin Bay (BB3 and BB6 in Fig. 1) on August 11, 2017. Both near-surface and near-bottom (<0.5 m above the sediment) water samples were collected again at these two stations on September 18, 2017. For the August 2017 experiment, both filtered (through pre-combusted Whatman GF/F filters, pore size=0.7 µm) and whole water were distributed into ground-neck 1000-mL quartz bottles. Only filtered water was used in the September 2017 experiment. There was no duplicate bottle for all incubations. Microbial activity in all incubating bottles was stopped by adding 400 µL saturated HgCl2 solution, and the bottles were then closed and exposed to natural sunlight outdoors. The bottle stoppers were secured with Parafilm® and placed in a plastic tray (89.9 cm ×42.5 cm×14.9 cm) filled with tap water. The water level in the tray was maintained near the bottle neck, which was about 14.5 cm height. The water temperature was purely controlled by air temperature (25°C~30°C). Aliquots of water samples (~12 mL) were extracted every 4-5 days using syringes from the 1000 mL quartz bottles for stable carbon isotope of dissolved inorganic carbon (δ13CDIC). Care was taken to minimize the opening time of bottle stoppers during sample extraction. δ13CDIC samples were save in 2 mL borosilicate autosampler vials (Restek®) with natural rubber septa lined open-top aluminum caps. δ13CDIC analyses were finished in two weeks after the experiment. The analytical methods for δ13CDIC was the same as those used in Wang et al. (2018). δ13CDIC samples were measured at J. Brandes’ lab at Skidaway Institute of Oceanography, University of Georgia. They were determined on a Thermo Fisher Delta V isotope ratio mass spectrometer (IRMS) with a GasBench II preparation module for trace gas samples. The analytical precision was ±0.1‰ (Brandes 2009). Brandes, J. A. 2009. Rapid and precise δ13C measurement of dissolved inorganic carbon in natural waters using liquid chromatography coupled to an isotope‐ratio mass spectrometer. Limnology and Oceanography: Methods 7: 730-739 Parameter or Variable: DOC-C13 (measured); Units: per mille; Observation Category: laboratory analysis; Sampling Instrument: 50 mL syringe from 1 L quartz bottle; Sampling and Analyzing Method: Near-surface (<0.5 m) water samples were collected from two stations along the main channel of Baffin Bay (BB3 and BB6 in Fig. 1) on August 11, 2017. Both near-surface and near-bottom (<0.5 m above the sediment) water samples were collected again at these two stations on September 18, 2017. For the August 2017 experiment, both filtered (through pre-combusted Whatman GF/F filters, pore size=0.7 µm) and whole water were distributed into ground-neck 1000-mL quartz bottles. Only filtered water was used in the September 2017 experiment. There was no duplicate bottle for all incubations. Microbial activity in all incubating bottles was stopped by adding 400 µL saturated HgCl2 solution, and the bottles were then closed and exposed to natural sunlight outdoors. The bottle stoppers were secured with Parafilm® and placed in a plastic tray (89.9 cm ×42.5 cm×14.9 cm) filled with tap water. The water level in the tray was maintained near the bottle neck, which was about 14.5 cm height. The water temperature was purely controlled by air temperature (25°C~30°C). The δ13CDOC samples were collected at the beginning and the end of each filtered water incubation and preserved in 40 mL Fisher brand borosilicate glass EPA vials with Teflon-lined silicone septa. δ13CDOC samples were preserved at pH~2 by adding concentrated HCl. The δ13CDOC samples were analyzed by C. Osburn’s lab in North Carolina State University. They were measured with a combination of an Aurora 1030C high-temperature catalytic conversion DOC analyzer, a molecular sieve trap, and a continuous-flow IRMS. The precision of the δ13CDOC analysis was ±0.2‰ (Lalonde et al. 2014). Lalonde, K., P. Middlestead, and Y. Gélinas. 2014a. Automation of 13C/12C ratio measurement for freshwater and seawater DOC using high temperature combustion. Limnology and Oceanography: Methods 12: 816-829. Parameter or Variable: CHLOROPHYLL A (measured); Units: microgram/liter; Observation Category: laboratory analysis; Sampling Instrument: 50 mL syringe; Sampling and Analyzing Method: Near-surface (<0.5 m) water samples were collected from two stations along the main channel of Baffin Bay (BB3 and BB6 in Fig. 1) on August 11, 2017. Both near-surface and near-bottom (<0.5 m above the sediment) water samples were collected again at these two stations on September 18, 2017. For the August 2017 experiment, both filtered (through pre-combusted Whatman GF/F filters, pore size=0.7 µm) and whole water were distributed into ground-neck 1000-mL quartz bottles. Only filtered water was used in the September 2017 experiment. There was no duplicate bottle for all incubations. Microbial activity in all incubating bottles was stopped by adding 400 µL saturated HgCl2 solution, and the bottles were then closed and exposed to natural sunlight outdoors. The bottle stoppers were secured with Parafilm® and placed in a plastic tray (89.9 cm ×42.5 cm×14.9 cm) filled with tap water. The water level in the tray was maintained near the bottle neck, which was about 14.5 cm height. The water temperature was purely controlled by air temperature (25°C~30°C). The chlorophyll a samples were collected at the beginning of the incubation. A known volume of water sample was gently filtered through Whatman GF/F filters (pore size =0.7 µm), which were then stored frozen at -20°C until analysis. Chlorophyll a was extracted from the filters by soaking for 18-24 hours in 90% HPLC-grade acetone at -20oC, after which the concentration was determined fluorometrically with a Turner Trilogy fluorometer without acidification. Parameter or Variable: d13Cocdegredated (calculated); Units: per mille; Observation Category: laboratory analysis; Sampling Instrument: calculated from DIC and stable carbon isotope of DIC; Sampling and Analyzing Method: The stable carbon isotope of photoreactive organic carbon was calculated using the DIC “Keeling” plot Parameter or Variable: DIC change (calculated); Units: micromole/liter; Observation Category: laboratory analysis; Sampling Instrument: calculate from DIC concentration change; Sampling and Analyzing Method: the difference between maximum and minimum of dissolved inorganic carbon during each incubation treatment Parameter or Variable: SALINITY (measured); Units: psu; Observation Category: in situ; Sampling Instrument: YSI - handheld multi-parameter instrument; Sampling and Analyzing Method: Salinity was measured at each site using a calibrated YSI ProPlus sonde. Parameter or Variable: DEPTH - SENSOR (measured); Units: meter; Observation Category: in situ; Sampling Instrument: YSI - handheld multi-parameter instrument; Sampling and Analyzing Method: Depth was measured at each site using a calibrated YSI ProPlus sonde asNeeded Metadata are developed, maintained and distributed by NCEI. Updates are performed as needed to maintain currentness. NOAA National Centers for Environmental Information custodian multi-parameter water quality sensor multi-parameter water quality sensor used to measure temperature, salinity, dissolved oxygen, and other parameters Instrument used to measure temperature, salinity, dissolved oxygen, and other parameters, often used to measure water quality parameters. Can be a hand-held instrument or a sonde for unattended monitoring. Often used in coastal water monitoring stations. YSI is the preeminent brand (as of 2024).