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Dissolved inorganic carbon, total alkalinity, pH, nutrients, and other variables collected from surface discrete observations using Niskin bottle and other instruments from R/V F. G. Walton Smith in the west coast of Florida within Gulf of Mexico from 2015-09-21 to 2015-09-25 (NCEI Accession 0157025)


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            title:  Dissolved inorganic carbon, total alkalinity, pH, nutrients, and other variables collected from surface discrete observations using Niskin bottle and other instruments from R/V F. G. Walton Smith in the west coast of Florida within Gulf of Mexico from 2015-09-21 to 2015-09-25 (NCEI Accession 0157025)
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                date:  2016-12-09
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                  Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/person/details/2530 Rik Wanninkhof
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        abstract:  This dataset contains the surface discrete measurements of dissolved inorganic carbon, total alkalinity, pH and nutrients in the west coast of Florida near the Everglades National Park. Increasing amounts of atmospheric carbon dioxide from human industrial activities are causing changes in global ocean carbon chemistry. Through the SOOP program we measure air and ocean surface pCO2 and take discrete samples of other carbon parameters. This effort is in support of the coastal monitoring and research objectives of the NOAA Ocean Acidification Program (OAP).
        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.
        credit:  Funding Information: NOAA Ocean Acidification Program (Coastal Observations on the East Coast: Ocean Acidification Monitoring Network, OAPFY13.03.AOML.001)
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              Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/datatype/details/588 DISSOLVED INORGANIC CARBON (DIC)
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              Anchor:  https://gcmd.earthdata.nasa.gov/kms/concept/7e95b5fc-1d58-431a-af36-948b29fa870d EARTH SCIENCE > OCEANS > SALINITY/DENSITY > SALINITY
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                    date:  2023
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                            description:  Global Change Master Directory (GCMD). 2023. GCMD Keywords, Version 17. 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
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            keyword:
              Anchor:  https://vocab.ices.dk/services/pox/GetCodeDetail/SHIPC/33WA F. G. Walton Smith (call sign: WCZ6292, ICES code: 33WA, 1999)
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                title:  ICES/SeaDataNet Ship Codes
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            keyword:
              Anchor:  https://gcmd.earthdata.nasa.gov/kms/concept/a4202721-0cba-4fa1-853f-890f146b04f9 OCEAN > ATLANTIC OCEAN > NORTH ATLANTIC OCEAN
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              Anchor:  https://gcmd.earthdata.nasa.gov/kms/concept/75fab119-51a6-4b59-9711-f6c3cd3139db OCEAN > ATLANTIC OCEAN > NORTH ATLANTIC OCEAN > GULF OF MEXICO
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            keyword:  Florida coast
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            keyword:  Tropical Atlantic
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            otherConstraints:  Cite as: Barbero, Leticia; Wanninkhof, Rik; Pierrot, Denis (2016). Dissolved inorganic carbon, total alkalinity, pH, nutrients, and other variables collected from surface discrete observations using Niskin bottle and other instruments from R/V F. G. Walton Smith in the west coast of Florida within Gulf of Mexico from 2015-09-21 to 2015-09-25 (NCEI Accession 0157025). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.7289/v5ws8r98. Accessed [date].
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            useLimitation:  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.
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                title:  R/V Walton Smith and R/V Savannah Coastal Florida Cruises
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                    date:  2022
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                      Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/institution/details/1730 US DOC; NOAA; NESDIS; National Centers for Environmental Information (NCEI)
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                title:  NOAA National Centers for Environmental Information (2022). Ocean Carbon and Acidification Data System (OCADS). NOAA National Centers for Environmental Information. https://www.ncei.noaa.gov/products/ocean-carbon-acidification-data-system
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                    beginPosition:  2015-09-21
                    endPosition:  2015-09-25
        supplementalInformation:  EXPOCODE: 33WA20150921 CRUISE ID: WS1509 PRINCIPAL INVESTIGATORS: Rik Wanninkhof {Atlantic Oceanographic and Meteorological Laboratory, National Oceanic and Atmospheric Administration (NOAA), 4301 Rickenbacker Causeway, Miami, FL, 33149, USA} Leticia Barbero {Atlantic Oceanographic and Meteorological Laboratory, National Oceanic and Atmospheric Administration (NOAA), 4301 Rickenbacker Causeway, Miami, FL, 33149, USA} Denis Pierrot {Atlantic Oceanographic and Meteorological Laboratory, National Oceanic and Atmospheric Administration (NOAA), 4301 Rickenbacker Causeway, Miami, FL, 33149, USA} Jia-Zhong Zhang {Atlantic Oceanographic and Meteorological Laboratory, National Oceanic and Atmospheric Administration (NOAA), 4301 Rickenbacker Causeway, Miami, FL, 33149, USA} FUNDING AGENCY: NOAA's Ocean Acidification Program PROJECT TITLE: Coastal Observations on the East Coast: Ocean Acidification Monitoring Network PROJECT ID: OAPFY13.03.AOML.001 In this accession, NCEI has archived multiple versions of these data. The latest (and best) version of these data has the largest version number.
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                description:  NCEI Accession 0157025 v1.1 was published.
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                  DateTime:  2016-12-09T17:26:02Z
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                                    description:  published 2016-12-09T17:26:02Z
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                description:  NCEI Accession 0157025 was revised and v2.2 was published.
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                  DateTime:  2020-10-07T21:30:25Z
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                description:  NCEI Accession 0157025 was revised and v3.3 was published.
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                  DateTime:  2021-08-10T21:02:13Z
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                description:  NCEI Accession 0157025 was revised and v4.4 was published.
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                  DateTime:  2022-06-08T20:45:47Z
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                description:  Parameter or Variable: Dissolved Inorganic Carbon; Abbreviation: DIC; Unit: micro-mol/kg; Observation type: Surface discrete measurement; In-situ / Manipulation / Response variable: In-situ observation; Measured or calculated: Measured; Sampling instrument: Niskin bottle / flow through system; 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 294-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 (AOML3 and AOML4) 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: 15 samples each 500-ml, no 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. A. Dickson of UCSD; CRM batch number: Batch 144; 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 288 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).
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: Total alkalinity; Abbreviation: TAlk; Unit: micro-mol/kg; Observation type: Surface discrete measurement; In-situ / Manipulation / Response variable: In-situ observation; Measured or calculated: Measured; Sampling instrument: Niskin bottle / flow through system; 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: 15 samples each 500-ml, no 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. A. Dickson of UCSD; CRM batch number: CRM batch: 129; 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., and 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).
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: pH; Abbreviation: pH; pH scale: Total; Observation type: Surface discrete measurement; In-situ / Manipulation / Response variable: In-situ observation; Measured or calculated: Measured; Sampling instrument: Niskin bottle / flow through system; Analyzing instrument: Agilent 8453 spectrometer setup with a custom-made temperature-controlled cell holder; Temperature of pH measurement: 20 (+/- 0.05) degrees Celsius; 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: 15 samples each 500-ml, no duplicate samples.; Standardization description: The pH is calibration-free.; At what temperature was pH reported: 20 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).
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: Water temperature; Abbreviation: SST_C; Unit: degrees celsius (ITS-90); Observation type: Flow-through; In-situ / Manipulation / Response variable: In-situ observation; Measured or calculated: Measured; Sampling instrument: SBE 38; 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).
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: Salinity; Abbreviation: SAL; Unit: practical salinity scale of 1978; Observation type: Flow through; In-situ / Manipulation / Response variable: In-situ observation; Sampling instrument: SBE 45; Uncertainty: plus or minus 0.005; 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).
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: Silicic acid concentration; Abbreviation: SILCAT; Unit: micromoles per kilogram; Observation type: Surface discrete measurement; In-situ / Manipulation / Response variable: In-situ observation; 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).
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: Nitrite total concentration; Abbreviation: NO2; Unit: micromoles per kilogram; Observation type: Surface discrete measurement; In-situ / Manipulation / Response variable: In-situ observation; 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).
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: Nitrate total concentration; Abbreviation: NO3; Unit: micromoles per kilogram; Observation type: Surface discrete measurement; In-situ / Manipulation / Response variable: In-situ observation; 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).
            processStep:  (LE_ProcessStep)
                description:  Parameter or Variable: Phosphate total concentration; Abbreviation: PHSPHT; Unit: micromoles per kilogram; Observation type: Surface discrete measurement; In-situ / Manipulation / Response variable: In-situ observation; 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) .
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    metadataMaintenance:  (MD_MaintenanceInformation)
        maintenanceAndUpdateFrequency:  (MD_MaintenanceFrequencyCode) asNeeded
        maintenanceNote:  Metadata are developed, maintained and distributed by NCEI. Updates are performed as needed to maintain currentness.
        maintenanceNote:  NCEI Accession 0157025 was revised and a new version of the archival package was published. Updates to existing archival packages may provide additional files or replace obsolete files. The latest version contains the most complete and up-to-date representation of this archival information package. All of the files received prior to this update are available in the preceding version of this accession. Please see journal.txt in the /about directory for additional details on changes made.
        contact:  (CI_ResponsibleParty)
            organisationName:  NOAA National Centers for Environmental Information
            role:  (CI_RoleCode) custodian
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    acquisitionInformation:  (MI_AcquisitionInformation)
        instrument:  (MI_Instrument)
            identifier:  (MD_Identifier)
                code:  spectrophotometer
            type:  spectrophotometer
            description:  spectrophotometer, optical spectrometer, spectrograph or spectroscope An optical spectrometer (spectrophotometer, spectrograph or spectroscope) is an instrument used to measure properties of light over a specific portion of the electromagnetic spectrum, typically used in spectroscopic analysis to identify materials. Butler, L. R. P.; Laqua, K. (1995). "Nomenclature, symbols, units and their usage in spectrochemical analysis-IX. Instrumentation for the spectral dispersion and isolation of optical radiation (IUPAC Recommendations 1995)". Pure Appl. Chem. IUPAC. 67 (10): 1725–1744. doi:10.1351/pac199567101725. A spectrometer is the general term for describing a combination of spectral apparatus with one or more detectors to measure the intensity of one or more spectral bands."
        platform:  (MI_Platform)
            identifier:  (MD_Identifier)
                code:  R/V F.G. Walton Smith
            description:  R/V; RSMAS Univ. of Miami; built 1999; active as July 2007 University of Miami assigned a new call sign to F.G. WALTON SMITH on January 13, 2021. The previous call sign was WCZ6292.
            instrument: (missing)