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Dissolved inorganic carbon, total alkalinity, pH on total scale, and other variables collected from discrete samples and profile observations during the R/V F. G. Walton Smith cruise WS21338 (EXPOCODE 33WA20211204) in the North Atlantic Ocean, Gulf of Mexico from 2021-12-04 to 2021-12-10 (NCEI Accession 0276022)

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This dataset includes the discrete profile measurements of dissolved inorganic carbon, total alkalinity, pH on total scale, ammonia, water temperature, salinity, dissolved oxygen and nutrients during the R/V F. G. Walton Smith cruise WS21338 (EXPOCODE 33WA20211204) in the Southeast U.S. Shelf, Gulf of Mexico from 2021-12-04 to 2021-12-10. Increasing amounts of atmospheric carbon dioxide from human industrial activities are causing changes in global ocean carbon chemistry resulting in a reduction in pH, a process termed ocean acidification. In support of the coastal monitoring and research objectives of the NOAA Ocean Acidification Program (OAP), the South Florida Project Cruises (SFP) are utilized to collect water samples to measure surface water inorganic carbon and hydrographic parameters including nutrients. Samples are collected from 34 stations on a bi-monthly basis to monitor the outflow of the Shark River Slough (SRS) and red tide in the southwestern Gulf of Mexico. Water samples are sent to and analyzed by scientists at the Atlantic Oceanographic & Meteorological Laboratory (AOML) for dissolved inorganic carbon, pH, total alkalinity and nutrient concentrations. These data are used to observe the effects of the SRS on acidification in the coastal ocean.
  • Cite as: Barbero, Leticia; Wanninkhof, Rik; Pierrot, Denis (2022). Dissolved inorganic carbon, total alkalinity, pH on total scale, and other variables collected from discrete samples and profile observations during the R/V F. G. Walton Smith cruise WS21338 (EXPOCODE 33WA20211204) in the North Atlantic Ocean, Gulf of Mexico from 2021-12-04 to 2021-12-10 (NCEI Accession 0276022). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.25921/t257-zg16. Accessed [date].
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Distributor NOAA National Centers for Environmental Information
+1-301-713-3277
NCEI.Info@noaa.gov
Dataset Point of Contact NOAA National Centers for Environmental Information
ncei.info@noaa.gov
Time Period 2021-12-04 to 2021-12-10
Spatial Bounding Box Coordinates
West: -83.50312
East: -80.10589
South: 24.47495
North: 27.80192
Spatial Coverage Map
General Documentation
Associated Resources
Publication Dates
  • publication: 2022-12-16
Data Presentation Form Digital table - digital representation of facts or figures systematically displayed, especially in columns
Dataset Progress Status Complete - production of the data has been completed
Historical archive - data has been stored in an offline storage facility
Data Update Frequency As needed
Supplemental Information
This dataset is associated with the following EXPOCODE(s): 33WA20211204, and cruise ID(s): WS21338. This data package (Submission ID: BGG27VL7P) was acquired by NCEI from the Scientific Data Integration System (SDIS) at the NOAA Pacific Marine Environmental Laboratory (PMEL) in accordance with the archival submission agreement between NCEI and PMEL.
Purpose To measure key carbon, physical and biogeochemical parameters in coastal waters of the US in relation to Ocean Acidification and monitor changes over time.
Use Limitations
  • accessLevel: Public
  • 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.
Dataset Citation
  • Cite as: Barbero, Leticia; Wanninkhof, Rik; Pierrot, Denis (2022). Dissolved inorganic carbon, total alkalinity, pH on total scale, and other variables collected from discrete samples and profile observations during the R/V F. G. Walton Smith cruise WS21338 (EXPOCODE 33WA20211204) in the North Atlantic Ocean, Gulf of Mexico from 2021-12-04 to 2021-12-10 (NCEI Accession 0276022). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.25921/t257-zg16. Accessed [date].
Cited Authors
Principal Investigators
Contributors
Resource Providers
Publishers
Acknowledgments
  • Funding Information: NOAA Ocean Acidification Program (Expanding near-shore carbonate measurements along the East-coast and Gulf of Mexico through multiple collaborations, 21403)
Theme keywords NODC DATA TYPES THESAURUS NODC OBSERVATION TYPES THESAURUS WMO_CategoryCode
  • oceanography
Global Change Master Directory (GCMD) Science Keywords OCADS Study Type
  • Discrete measurement
  • Profile
Provider Variable Abbreviations
  • AMMONIA
  • CHL and PHAE
  • CTDOXY
  • CTDOXYmg
  • CTDPRS
  • CTDSAL
  • CTDTMP
  • DIC
  • Depth_sampling
  • Depth_station
  • NITRIT+NITRAT
  • PHSPHT
  • SILCAT
  • Sigma-Theta
  • TAlk
  • pH
Data Center keywords NODC COLLECTING INSTITUTION NAMES THESAURUS NODC SUBMITTING INSTITUTION NAMES THESAURUS Global Change Master Directory (GCMD) Data Center Keywords
Platform keywords NODC PLATFORM NAMES THESAURUS ICES/SeaDataNet Ship Codes
Instrument keywords NODC INSTRUMENT TYPES THESAURUS Global Change Master Directory (GCMD) Instrument Keywords
Place keywords NODC SEA AREA NAMES THESAURUS Global Change Master Directory (GCMD) Location Keywords
Project keywords NODC PROJECT NAMES THESAURUS Cruise ID
  • WS21338
EXPOCODE
  • 33WA20211204
Ocean Acidification Search Keywords
  • Ocean Acidification Program (OAP)
  • Ocean Carbon and Acidification Data System (OCADS) Project
Reference Section ID
  • Coastal
Keywords NCEI ACCESSION NUMBER
Use Constraints
  • Cite as: Barbero, Leticia; Wanninkhof, Rik; Pierrot, Denis (2022). Dissolved inorganic carbon, total alkalinity, pH on total scale, and other variables collected from discrete samples and profile observations during the R/V F. G. Walton Smith cruise WS21338 (EXPOCODE 33WA20211204) in the North Atlantic Ocean, Gulf of Mexico from 2021-12-04 to 2021-12-10 (NCEI Accession 0276022). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.25921/t257-zg16. Accessed [date].
Access Constraints
  • 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.
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  • 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.
Lineage information for: dataset
Processing Steps
  • 2022-12-16T02:19:39Z - NCEI Accession 0276022 v1.1 was published.
Output Datasets
Lineage information for: dataset
Processing Steps
  • Parameter or Variable: Dissolved Inorganic Carbon; Abbreviation: DIC; Unit: micro-mol/kg; Observation type: Profile and Flow Through (FT); In-situ / Manipulation / Response variable: in-situ observation; Measured or calculated: Measured; Sampling instrument: Niskin bottle; Analyzing instrument: Two systems consisting of a coulometer (UIC Inc.) coupled with a Dissolved Inorganic Carbon Extractor (DICE) inlet system. DICE was developed by Esa Peltola and Denis Pierrot of NOAA/AOML and Dana Greeley of NOAA/PMEL to modernize a carbon extractor called SOMMA (Johnson et al. 1985, 1987, 1993, and 1999; Johnson 1992); Detailed sampling and analyzing information: Samples for total dissolved inorganic carbon (DIC) measurements were drawn according to procedures outlined in the Guide to best practices for ocean CO2 measurements (Dickson et al., 2007) from Niskin bottles into cleaned 500-ml glass bottles. Bottles were rinsed and filled from the bottom, leaving 6 ml of headspace; care was taken not to entrain any bubbles. After 0.2 ml of saturated HgCl2 solution was added as a preservative, the sample bottles were sealed with glass stoppers lightly covered with Apiezon-L grease and were stored at room temperature to be sent back to the lab for analysis after the cruise. The analysis was done by coulometry with two analytical systems (AOML5 and AOML6) used simultaneously. In the coulometric analysis of DIC, all carbonate species are converted to CO2 (gas) by addition of excess hydrogen ion (acid) to the seawater sample, and the evolved CO2 gas is swept into the titration cell of the coulometer with pure air or compressed nitrogen, where it reacts quantitatively with a proprietary reagent based on ethanolamine to generate hydrogen ions. In this process, the solution changes from blue to colorless, triggering a current through the cell and causing coulometrical generation of OH minus ions at the anode. The OH ions react with the H+, and the solution turns blue again. A beam of light is shone through the solution, and a photometric detector at the opposite side of the cell senses the change in transmission. Once the percent transmission reaches its original value, the coulometric titration is stopped, and the amount of CO2 that enters the cell is determined by integrating the total charge during the titration. The volume of the pipette used to deliver the sample in each system was determined with aliquots of distilled water at known temperature. The weights with the appropriate densities were used to determine the volume of the pipette. Calculation of the amount of CO2 injected was according to the CO2 handbook (Dickson et al., 2007).The instrument has a salinity sensor, but all DIC values were recalculated to a molar weight (micro-mol/kg) using density obtained from the CTD salinity. The DIC values were corrected for dilution by 0.2 ml of saturated HgCl2 used for sample preservation (Measured DIC*1.00037). A correction was also applied for the offset from the CRM. This additive correction was applied for each cell using the CRM value obtained in the beginning of the cell. Please consult the accompanying Readme file for additional details.; Replicate information: 82 samples each 500-ml, 7 duplicate samples.; Standardization description: The coulometers were calibrated by injecting aliquots of pure CO2 (99.99%) by means of an 8-port valve outfitted with two sample loops with known gas volumes bracketing the amount of CO2 extracted from the water samples for the two AOML systems.; Standardization frequency: The stability of each coulometer cell solution was confirmed three different ways: two sets of gas loops were measured at the beginning; also the Certified Reference Material (CRM), supplied by Dr. A. Dickson of UCSD, were measured at the beginning; and the duplicate samples at the beginning, middle, and end of each cell solution. The coulometer cell solution was replaced after 25 mg of carbon was titrated, typically after 9 to 12 hours of continuous use.; CRM manufacturer: Dr. Andrew Dickson of UCSD; CRM batch number: Batch 178 and 194; Preservation method: saturated HgCl2; Preservative volume: 0.2 ml; Preservative correction: The DIC values were corrected for dilution by 0.2 ml of saturated HgCl2 used for sample preservation. The total water volume of the sample bottles was 540 ml (calibrated by Esa Peltola, AOML). The correction factor used for dilution was 1.00037.; Quality flag convention: WOCE quality control flags are used: 2 = good value, 3 = questionable value, 4 = bad value, 5 = value not reported, 6 = mean of replicate measurements, 9 = sample not drawn.; Method reference: Dickson, A.G., Sabine, C.L. and Christian, J.R. (Eds.) 2007. Guide to best practices for ocean CO2 measurements. PICES Special Publication 3, 191 pp. Johnson, K.M., Kortzinger, A.; Mintrop, L.; Duinker, J.C.; and Wallace, D.W.R. (1999). Coulometric total carbon dioxide analysis for marine studies: Measurement and internal consistency of underway surface TCO2 concentrations. Marine Chemistry 67:123 to 44.Johnson, K.M., Wills, K.D.; Butler, D.B.; Johnson, W.K.; and Wong, C.S. (1993). Coulometric total carbon dioxide analysis for marine studies: Maximizing the performance of an automated gas extraction.Johnson, K.M. (1992). Operator Manual: Single-Operator Multiparameter Metabolic Analyzer (SOMMA) for Total Carbon Dioxide (CT) with Coulometric Detection. Brookhaven National Laboratory, Brookhaven, N.Y. Johnson, K.M.; Williams, P.J.; Brandstrom, L.; and McN. Sieburth, J. (1987). Coulometric total carbon analysis for marine studies: Automation and calibration. Marine Chemistry 21:117 to 33.; Researcher name: Rik Wanninkhof; Researcher institution: Atlantic Oceanographic and Meteorological Laboratory, National Oceanic and Atmospheric Administration (NOAA).
  • Parameter or Variable: Total alkalinity; Abbreviation: TAlk; Unit: micro-mol/kg; Observation type: Profile and Flow Through (FT); In-situ / Manipulation / Response variable: in-situ observation; Measured or calculated: Measured; Sampling instrument: Niskin bottle; Analyzing instrument: Semi-automatic titration systems, System 1 consists of a Metrohm 765 Dosimat titrator, a pH meter (Orion 720A, ThermoScientific), a ROSS half cell pH glass electrode (Orion 9101BN, ThermoScientific) and a reference electrode (Orion 900200, ThermoScientific). System 2 consists of a Metrohm 665 Dosimat titrator, a pH meter (Orion 2 star pH Benchtop, ThermoScientific), a ROSS half cell pH glass electrode (Orion 9101BN, ThermoScientific) and a reference electrode (Orion 900200, ThermoScientific).; Type of titration: Full Titration; Cell type (open or closed): open; Curve fitting method: Least-Square Analysis; Detailed sampling and analyzing information: All of the samples were run using leftover water from the same sample bottles used for DIC and pH. Please refer to DIC for detailed information on sampling and conservation of samples. For each measurement, approximately 200 ml of water sample were titrated with an HCl solution provided by Dr. Andrew Dickson of UCSD (0.25175 moles per kilogram-solution). Please consult the accompanying Readme file for additional details.; Replicate information: 82 samples each 500-ml, 7 duplicate samples.; Standardization description: 2 CRM samples were run daily on each cell, before and after the seawater samples. The Total Alkalinity for the water samples was corrected using the daily averaged ratios between the certified and measured values of the 2 CRMs run on each cell. This TA titration system has a precision of 0.1 %. All the TA values were directly measured with reference to Certified Reference Material. The accuracy after correction is 0.1%. Please check attached pdf for more details.; Standardization frequency: All values were directly measured with reference to Certified Reference Material (Dickson, UCSD). 2 CRM samples were run daily on each cell.; CRM manufacturer: Dr. Andrew Dickson of UCSD; CRM batch number: CRM batch: 178 and 194; Preservation method: saturated HgCl2; Preservative volume: 0.2 ml; Uncertainty: The precision of this method is better than 0.1% and accuracy is 0.1%.; Quality flag convention: WOCE quality control flags are used: 2 = good value, 3 = questionable value, 4 = bad value, 5 = value not reported, 6 = mean of replicate measurements, 9 = sample not drawn.; Method reference: Millero, F. J., Zhang, J. Z., Lee, K., & Campbell, D. M. (1993). Titration alkalinity of seawater. Marine Chemistry, 44(2), 153-165.; Researcher name: Rik Wanninkhof; Researcher institution: Atlantic Oceanographic and Meteorological Laboratory, National Oceanic and Atmospheric Administration (NOAA).
  • Parameter or Variable: pH; Abbreviation: pH; pH scale: Total scale (T); Observation type: Profile and Flow Through (FT); In-situ / Manipulation / Response variable: in-situ observation; Measured or calculated: Measured; Sampling instrument: Niskin bottle; Analyzing instrument: Agilent 8453 spectrometer setup with a custom-made temperature-controlled cell holder; Detailed sampling and analyzing information: The same sample bottle was used for pH, DIC and Talk analyses, with pH being analyzed first. The samples were fixed with HgCl2 (refer to DIC for more information on sampling and storage). Samples were thermostated at 20 (+/- 0.05) degrees Celsius in a water bath. Approximately 80 ml of sample were extracted from each DIC sample bottle by syringe before DIC analysis to determine the pH. Temperature for each sample was measured before analysis using a Hart Scientific Fluke 1523 reference thermometer. Absorbance blanks were taken for each sample and 10 micro liter of purified m-cresol purple (10 mmol kg-1) were added for the analysis. The equations of Liu et al, 2011 formulated using the purified m-cresol purple indicator were used to determine pH of the samples. pH samples were analyzed at 20C. Please check accompanying readme file for additional details.; Replicate information: 82 samples each 500-ml, 7 duplicate samples.; Standardization description: The pH is calibration-free.; At what temperature was pH reported: 20 and 25 degrees Celsius; Uncertainty: Please check attached pdf for more details; Quality flag convention: WOCE quality control flags are used: 2 = good value, 3 = questionable value, 4 = bad value, 5 = value not reported, 6 = mean of replicate measurements, 9 = sample not drawn.; Method reference: Liu, X.; Patsavas, M.C.; and Byrne, R. H. (2011). Purification and characterization of meta-cresol purple for spectrophotometric seawater pH measurements. Environmental Science and Technology, 45(11), 4862-4868. https://doi.org/10.1021/es200665d; Researcher name: Rik Wanninkhof; Researcher institution: Atlantic Oceanographic and Meteorological Laboratory, National Oceanic and Atmospheric Administration (NOAA).
  • Parameter or Variable: Depth of water at station; Abbreviation: Depth_station; Unit: meters; Observation type: Profile; In-situ / Manipulation / Response variable: Surface underway and profile; Measured or calculated: Measured or calculated; Sampling instrument: Sounder or altimeter, models vary; Detailed sampling and analyzing information: Ship based sounder used when available. Depth from an altimeter on the CTD may also be used. Where neither of theses sources were available (typically due to water depth exceeding sounder's detection limit), depth may be estimated using the ETOPO1 bathymetry.; Uncertainty: Uncertainty varies with source; Quality flag convention: -999 indicates bad or missing data; Researcher name: Rik Wanninkhof; Researcher institution: Atlantic Oceanographic and Meteorological Laboratory, National Oceanic and Atmospheric Administration (NOAA).
  • Parameter or Variable: Depth of water at sample collection; Abbreviation: Depth_sampling; Unit: meters; Observation type: Profile; In-situ / Manipulation / Response variable: In-situ observation; Measured or calculated: Measured; Sampling instrument: SBE 911plus CTD; Uncertainty: plus or minus 1 meter (data has also been vertically binaveraged to 1 decibar bins); Quality flag convention: -999 indicates bad or missing data; Researcher name: Rik Wanninkhof; Researcher institution: Atlantic Oceanographic and Meteorological Laboratory, National Oceanic and Atmospheric Administration (NOAA).
  • Parameter or Variable: Water pressure; Abbreviation: CTDPRS; Unit: decibars; Observation type: Profile; In-situ / Manipulation / Response variable: In-situ observation; Measured or calculated: Measured; Sampling instrument: SBE 911plus CTD; Uncertainty: plus or minus decibar (data has also been vertically binaveraged to 1 decibar bins); Quality flag convention: -999 indicates bad or missing data; Researcher name: Rik Wanninkhof; Researcher institution: Atlantic Oceanographic and Meteorological Laboratory, National Oceanic and Atmospheric Administration (NOAA).
  • Parameter or Variable: Water temperature; Abbreviation: CTDTMP; Unit: degrees celsius (ITS-90); Observation type: Profile; In-situ / Manipulation / Response variable: In-situ observation; Measured or calculated: Measured; Sampling instrument: SBE 911plus CTD; Uncertainty: plus or minus 0.001 degrees celsius; Quality flag convention: -999 indicates bad or missing data; Researcher name: Rik Wanninkhof; Researcher institution: Atlantic Oceanographic and Meteorological Laboratory, National Oceanic and Atmospheric Administration (NOAA).
  • Parameter or Variable: Salinity; Abbreviation: CTDSAL; Unit: practical salinity scale of 1978; Observation type: Profile; In-situ / Manipulation / Response variable: In-situ observation; Measured or calculated: Seasave 7, calculated from temperature and conductivity; Sampling instrument: SBE 911plus CTD; Detailed sampling and analyzing information: CTD Salinity values were validated using water samples collected during profiles. Corrections were applied when needed.; Uncertainty: plus or minus 0.01 PSS-78; Quality flag convention: -999 indicates bad or missing data; Researcher name: Rik Wanninkhof; Researcher institution: Atlantic Oceanographic and Meteorological Laboratory, National Oceanic and Atmospheric Administration (NOAA).
  • Parameter or Variable: Potential density at surface pressure; Abbreviation: Sigma-Theta; Unit: kilograms per cubic meter minus 1000; Observation type: Profile; In-situ / Manipulation / Response variable: In-situ observation; Measured or calculated: Calculated; Sampling instrument: SBE 911plus CTD; Uncertainty: plus or minus 0.01 kilograms per cubic meter; Quality flag convention: -999 indicates bad or missing data; Researcher name: Rik Wanninkhof; Researcher institution: Atlantic Oceanographic and Meteorological Laboratory, National Oceanic and Atmospheric Administration (NOAA).
  • Parameter or Variable: Dissolved Oxygen; Abbreviation: CTDOXYmg; Unit: milligrams per liter; Observation type: Profile; In-situ / Manipulation / Response variable: In-situ observation; Measured or calculated: Measured; Sampling instrument: SBE-43 dissolved oxygen sensor; Uncertainty: plus or minus 2 percent of saturation; Quality flag convention: -999 indicates bad or missing data; Researcher name: Rik Wanninkhof; Researcher institution: Atlantic Oceanographic and Meteorological Laboratory, National Oceanic and Atmospheric Administration (NOAA).
  • Parameter or Variable: Dissolved Oxygen; Abbreviation: CTDOXY; Unit: micromoles per kilogram; Observation type: Profile; In-situ / Manipulation / Response variable: In-situ observation; Measured or calculated: Measured; Sampling instrument: SBE-43 dissolved oxygen sensor; Uncertainty: plus or minus 2 percent of saturation; Quality flag convention: -999 indicates bad or missing data; Researcher name: Rik Wanninkhof; Researcher institution: Atlantic Oceanographic and Meteorological Laboratory, National Oceanic and Atmospheric Administration (NOAA).
  • Parameter or Variable: Silicic acid concentration; Abbreviation: SILCAT; Unit: micromoles per kilogram; Observation type: Profile and Flow Through (FT); In-situ / Manipulation / Response variable: In-situ observation; Measured or calculated: Measured; Analyzing instrument: Seal Analytical Auto Analyzer 3; Detailed sampling and analyzing information: Please check attached pdf for more details; Quality flag convention: -999 indicates bad or missing data; Method reference: Zhang, J-.Z. and Berberian, G.A. (1997). Determination of dissolved silicate in estuarine and coastal waters by gas segmented flow colorimetric analysis, U.S. Environmental Protection Agency, (EPA Method 366.0), EPA-600-R-97-072. Zhang, J-.Z., Fischer, C.J. and Ortner, P.B. (2001). Continuous flow analysis of phosphate in natural waters using hydrazine as a reductant. Intern. J. Environ. Anal. Chem. 80(1): 61-73. Zhang, J.-Z., Ortner, P.B. and Fischer, C.J. (1997b). Determination of nitrate and nitrite in estuarine and coastal waters by gas segmented continuous flow colorimetric analysis. U.S. Environmental Protection Agency (EPA Method 353.4), EPA-600-R-97-072. Zhang, J.-Z., Ortner, P.B., Fischer, C.J and Moore, L.D. (1997a). Determination of ammonia in estuarine and coastal waters by gas segmented continuous flow colorimetric analysis. U.S. Environmental Protection Agency (EPA Method 349.0), EPA-600-R-97-072. Zimmermann, C.F., and C.W. Keefe (1997). Determination of orthophosphate in estuarine and coastal waters by automated colorimetric analysis. U.S. Environmental Protection Agency (EPA method 365.5), EPA-600-R-97-072.; Researcher name: Jia-Zhong Zhang; Researcher institution: Atlantic Oceanographic and Meteorological Laboratory, National Oceanic and Atmospheric Administration (NOAA).
  • Parameter or Variable: Nitrate and Nitrite total concentration; Abbreviation: NITRIT+NITRAT; Unit: micromoles per kilogram; Observation type: Profile and Flow Through (FT); In-situ / Manipulation / Response variable: In-situ observation; Measured or calculated: Measured; Analyzing instrument: Seal Analytical Auto Analyzer 3; Detailed sampling and analyzing information: Please check attached pdf for more details; Quality flag convention: -999 indicates bad or missing data; Method reference: Zhang, J-.Z. and Berberian, G.A. (1997). Determination of dissolved silicate in estuarine and coastal waters by gas segmented flow colorimetric analysis, U.S. Environmental Protection Agency, (EPA Method 366.0), EPA-600-R-97-072. Zhang, J-.Z., Fischer, C.J. and Ortner, P.B. (2001). Continuous flow analysis of phosphate in natural waters using hydrazine as a reductant. Intern. J. Environ. Anal. Chem. 80(1): 61-73. Zhang, J.-Z., Ortner, P.B. and Fischer, C.J. (1997b). Determination of nitrate and nitrite in estuarine and coastal waters by gas segmented continuous flow colorimetric analysis. U.S. Environmental Protection Agency (EPA Method 353.4), EPA-600-R-97-072. Zhang, J.-Z., Ortner, P.B., Fischer, C.J and Moore, L.D. (1997a). Determination of ammonia in estuarine and coastal waters by gas segmented continuous flow colorimetric analysis. U.S. Environmental Protection Agency (EPA Method 349.0), EPA-600-R-97-072. Zimmermann, C.F., and C.W. Keefe (1997). Determination of orthophosphate in estuarine and coastal waters by automated colorimetric analysis. U.S. Environmental Protection Agency (EPA method 365.5), EPA-600-R-97-072.; Researcher name: Jia-Zhong Zhang; Researcher institution: Atlantic Oceanographic and Meteorological Laboratory, National Oceanic and Atmospheric Administration (NOAA).
  • Parameter or Variable: Ammonia concentration; Abbreviation: AMMONIA; Unit: micromoles per kilogram; Observation type: Profile and Flow Through (FT); In-situ / Manipulation / Response variable: In-situ observation; Measured or calculated: Measured; Analyzing instrument: Seal Analytical Auto Analyzer 3; Detailed sampling and analyzing information: Please check attached pdf for more details; Quality flag convention: -999 indicates bad or missing data; Method reference: Zhang, J-.Z. and Berberian, G.A. (1997). Determination of dissolved silicate in estuarine and coastal waters by gas segmented flow colorimetric analysis, U.S. Environmental Protection Agency, (EPA Method 366.0), EPA-600-R-97-072. Zhang, J-.Z., Fischer, C.J. and Ortner, P.B. (2001). Continuous flow analysis of phosphate in natural waters using hydrazine as a reductant. Intern. J. Environ. Anal. Chem. 80(1): 61-73. Zhang, J.-Z., Ortner, P.B. and Fischer, C.J. (1997b). Determination of nitrate and nitrite in estuarine and coastal waters by gas segmented continuous flow colorimetric analysis. U.S. Environmental Protection Agency (EPA Method 353.4), EPA-600-R-97-072. Zhang, J.-Z., Ortner, P.B., Fischer, C.J and Moore, L.D. (1997a). Determination of ammonia in estuarine and coastal waters by gas segmented continuous flow colorimetric analysis. U.S. Environmental Protection Agency (EPA Method 349.0), EPA-600-R-97-072. Zimmermann, C.F., and C.W. Keefe (1997). Determination of orthophosphate in estuarine and coastal waters by automated colorimetric analysis. U.S. Environmental Protection Agency (EPA method 365.5), EPA-600-R-97-072.; Researcher name: Jia-Zhong Zhang; Researcher institution: Atlantic Oceanographic and Meteorological Laboratory, National Oceanic and Atmospheric Administration (NOAA).
  • Parameter or Variable: Phosphate concentration; Abbreviation: PHSPHT; Unit: micromoles per kilogram; Observation type: Profile and Flow Through (FT); In-situ / Manipulation / Response variable: In-situ observation; Measured or calculated: Measured; Analyzing instrument: Seal Analytical Auto Analyzer 3; Detailed sampling and analyzing information: Please check attached pdf for more details; Quality flag convention: -999 indicates bad or missing data; Method reference: Zhang, J-.Z. and Berberian, G.A. (1997). Determination of dissolved silicate in estuarine and coastal waters by gas segmented flow colorimetric analysis, U.S. Environmental Protection Agency, (EPA Method 366.0), EPA-600-R-97-072. Zhang, J-.Z., Fischer, C.J. and Ortner, P.B. (2001). Continuous flow analysis of phosphate in natural waters using hydrazine as a reductant. Intern. J. Environ. Anal. Chem. 80(1): 61-73. Zhang, J.-Z., Ortner, P.B. and Fischer, C.J. (1997b). Determination of nitrate and nitrite in estuarine and coastal waters by gas segmented continuous flow colorimetric analysis. U.S. Environmental Protection Agency (EPA Method 353.4), EPA-600-R-97-072. Zhang, J.-Z., Ortner, P.B., Fischer, C.J and Moore, L.D. (1997a). Determination of ammonia in estuarine and coastal waters by gas segmented continuous flow colorimetric analysis. U.S. Environmental Protection Agency (EPA Method 349.0), EPA-600-R-97-072. Zimmermann, C.F., and C.W. Keefe (1997). Determination of orthophosphate in estuarine and coastal waters by automated colorimetric analysis. U.S. Environmental Protection Agency (EPA method 365.5), EPA-600-R-97-072.; Researcher name: Jia-Zhong Zhang; Researcher institution: Atlantic Oceanographic and Meteorological Laboratory, National Oceanic and Atmospheric Administration (NOAA).
  • Parameter or Variable: Chlorophyll and Phaeophytin; Abbreviation: CHL and PHAE; Unit: Micrograms per Liter; Observation type: Profile and Flow Through (FT); In-situ / Manipulation / Response variable: In-situ observation; Measured or calculated: Measured; Sampling instrument: Niskin Bottle; Analyzing instrument: Turner Designs TD-700 Fluorometer; Detailed sampling and analyzing information: Chlorophyll-a concentrations are determined via a standardized filtration-extraction method using a 60:40 mixture of 90% acetone and dimethyl sulfoxide. The fluorescence of each sample is measured before and after the acidification in order to correct for phaeophytin on a TD-700 fluorometer.; Replicate information: Replicate every sample; Uncertainty: 0.1 µg/L; Quality flag convention: -999 indicates bad or missing data; Method reference: Shoaf, W.T. and Lium, B.W. (1976). Improved extraction of chlorophyll-a and b from algae using dimethyl sulfoxide. Limnology and Oceanography 21: 926-928. EPA Method 445 (1997) In vitro determination of chlorophyll-a in marine and freshwater algae by fluorescence.; Researcher name: Chris Kelble; Researcher institution: Atlantic Oceanographic and Meteorological Laboratory, National Oceanic and Atmospheric Administration (NOAA) .
Acquisition Information (collection)
Instrument
  • carbon dioxide (CO2) gas analyzer
  • nutrient autoanalyzer
  • oxygen sensor
  • salinometer
  • temperature sensor
  • titrator
Platform
  • R/V F.G. Walton Smith
Last Modified: 2024-03-08T13:20:29Z
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