Discrete, profile measurements of dissolved inorganic carbon (DIC), total alkalinity (TA), pH on total scale, water temperature, salinity and other chemical and hydrographic parameters during the R/V W. T. Hogarth Coastal cruise H23197 (EXPOCODE 33SGDK20230518) in the U.S. East Coast and Gulf of Mexico from 2023-05-18 to 2023-05-25 (NCEI Accession 0295611)
INVESTIGATORS:
Denis Pierrot 
- NOAA Atlantic Oceanographic and Meteorological Laboratory (AOML)
- NOAA Atlantic Oceanographic and Meteorological Laboratory (AOML)
Leticia Barbero
- Cooperative Institute for Marine and Atmospheric Studies
- Cooperative Institute for Marine and Atmospheric Studies
Rik Wanninkhof
- NOAA Atlantic Oceanographic and Meteorological Laboratory (AOML)
- NOAA Atlantic Oceanographic and Meteorological Laboratory (AOML)
Jia-Zhong Zhang
- NOAA Atlantic Oceanographic and Meteorological Laboratory (AOML)
Christopher R. Kelble
- NOAA Atlantic Oceanographic and Meteorological Laboratory (AOML)
PACKAGE DESCRIPTION: This dataset consists of Discrete, profile measurements of dissolved inorganic carbon (DIC), total alkalinity (TA), pH on total scale, water temperature, salinity and other chemical and hydrographic parameters during the R/V W. T. Hogarth Coastal cruise H23197 (EXPOCODE 33SGDK20230518) in the U.S. East Coast and Gulf of Mexico from 2023-05-18 to 2023-05-25. Near-shore estuarine and coastal regions are where most recreational fishing and tourism occur, yet they are vastly under-sampled. Their susceptibility to OA is not well understood due to their high biogeochemical variability. These regions are affected by land-side processes such as river discharge and run-offs and ocean-side processes through slope water exchange. A full determination of the carbonate system in these regions in conjunction with open ocean measurements is needed to increase our understanding of the effects of OA on ocean health and fisheries and our ability to predict them. In this project, we performed several observational campaigns by 1) adding a carbonate component to the harmful algal blooms (HABs) monitoring cruises conducted periodically on the Western Florida Shelf in order to study potential links between HABs and OA, 2) renewing our collaboration with select National Parks to complement and enhance our near-shore data collection on the Northern Gulf of Mexico and US East Coast, and 3) complementing our underway surface pCO2 measurements in the Gulf of Mexico and US East Coast with underway total alkalinity measurements to help us improve our fundamental understanding of nearshore OA processes. The addition of these measurements to the current assets already present in the region would enhance our understanding of the linkage between nearshore and open ocean processes and better assess the mechanisms and impacts of OA on the biogeochemistry, biology and their economic consequences.
CITE AS: Pierrot, Denis; Barbero, Leticia; Wanninkhof, Rik (2024). Discrete, profile measurements of dissolved inorganic carbon (DIC), total alkalinity (TA), pH on total scale, water temperature, salinity and other chemical and hydrographic parameters during the R/V W. T. Hogarth Coastal cruise H23197 (EXPOCODE 33SGDK20230518) in the U.S. East Coast and Gulf of Mexico from 2023-05-18 to 2023-05-25 (NCEI Accession 0295611). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.25921/fbwe-3p44. Accessed [date].
DATA LICENSE:
- These data were produced by NOAA and are not subject to copyright protection in the United States. NOAA waives any potential copyright and related rights in these data worldwide through the Creative Commons Zero 1.0 Universal (CC0-1.0) Public Domain Dedication.
- https://creativecommons.org/publicdomain/zero/1.0/
FAIR DATA USE REQUEST: [Please read before downloading the data] Inorganic carbon data from the SFER cruises are made freely available to the public and the scientific community in the belief that their wide dissemination will lead to greater understanding and new scientific and policy insights. The investigators sharing these data rely on the ethics and integrity of the user to ensure that the institutions and investigators involved in producing these data sets receive fair credit for their work, which in turn helps ensure the continuity of the observational time-series. If the data are obtained for potential use in a publication or presentation, we urge the end user to inform the investigators at the outset of this work so that we can help ensure that the quality and limitations of the data are accurately represented. If these data are essential to the work, or if an important result or conclusion depends on these data, co-authorship may be appropriate. This should be discussed at an early stage in the work. We request that manuscripts using these data be shared before they are submitted for publication. Please direct all queries about this data set to Drs. Leticia Barbero (leticia.barbero@noaa.gov) and Denis Pierrot (denis.pierrot@noaa.gov).
IDENTIFICATION INFORMATION FOR THIS DATA PACKAGE:
NCEI ACCESSION: 0295611
NCEI DOI: https://doi.org/10.25921/fbwe-3p44
EXPOCODE: 33SGDK20230518;
CRUISE ID: H23197;
SECTION/LEG: Coastal cruises;
TYPES OF STUDY:
Discrete measurement;Profile;
TEMPORAL COVERAGE:
SPATIAL COVERAGE:
GEOGRAPHIC NAMES:
PLATFORMS:
RESEARCH PROJECT(S):
Discrete measurement;Profile;
TEMPORAL COVERAGE:
START DATE: 2023-05-18
END DATE: 2023-05-25
SPATIAL COVERAGE:
NORTH: 27.801
WEST: -83.503
EAST: -80.105
SOUTH: 24.478
GEOGRAPHIC NAMES:
Gulf of Mexico;North Atlantic Ocean;
PLATFORMS:
W.T. Hogarth (ID: 33SGDK);
RESEARCH PROJECT(S):
SFER;
VARIABLES / PARAMETERS:
| 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: | 80 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 195 |
| 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) |
| Total alkalinity | |
|---|---|
| Abbreviation: | TAlk |
| Unit: | micro-mol/kg |
| Observation type: | Profile and Flow Through (FT) |
| In-situ / Manipulation / Response variable: | IN-SITUO BSERVATION |
| 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: | 80 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: 195 |
| 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) |
| pH | |
|---|---|
| Abbreviation: | pH |
| pH scale: | TOTALSCALE(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. In addition, pH values were also reported at 25C, this was calculated using the measured pH values and converted to 25C using the excel version of CO2sys v3.0. |
| Replicate information: | 80 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. doi: 10.1021/es200665d |
| Researcher name: | Rik Wanninkhof |
| Researcher institution: | Atlantic Oceanographic and Meteorological Laboratory, National Oceanic and Atmospheric Administration (NOAA) |
| Depth of water at sample collection | |
|---|---|
| Abbreviation: | Depth_meters |
| 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) |
| 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 |
| Detailed sampling and analyzing information: | The temperature of samples collected using a seawater flow-through line were measured using a shipboard SBE TSG. These samples are labeled as Flow-Through under the Observation Type column. |
| 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) |
| 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. The salinity of samples collected using a seawater flow-through line were measured using a shipboard SBE TSG. These samples are labeled as Flow-Through under the Observation Type column. |
| 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) |
| 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) |
| 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 readme 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) |
| 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 readme 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) |
| 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 readme 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) |
| 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 readme 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) |
| 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) |
| Analysis Temperature of pH Measurment | |
|---|---|
| Abbreviation: | pH_Analysis_Temp_DegC |
| Unit: | degrees celsius (ITS-90) |
| In-situ / Manipulation / Response variable: | In-situ observation |
| Analyzing instrument: | Fluke Reference Thermometer model 1523 |
| Uncertainty: | plus or minus 0.009 Deg C |
| Researcher name: | Rik Wanninkhof |
| Researcher institution: | Atlantic Oceanographic and Meteorological Laboratory, National Oceanic and Atmospheric Administration (NOAA) |
PUBLICATIONS DESCRIBING THIS DATASET:
none;
ADDITIONAL INFORMATION:
Please consult Readme file for additional information on analysis of carbon parameters. The most up to date version of this dataset is available at https://www.aoml.noaa.gov/ocd/ocdweb/shortcruises/shortcruises_gomcaribbean.html.
FUNDING:
NOAA's Ocean Acidification Program
PROJECT TITLE:
Expanding near-shore carbonate measurements along the East-coast and Gulf of Mexico through multiple collaborations
PROJECT ID:
21403
SUBMITTED BY: Patrick Mears (patrick.mears@noaa.gov)
SUBMISSION DATE: 2024-07-26
