gov.noaa.nodc:0189249 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 2026-03-26T07:18:34Z ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) Dissolved inorganic carbon (DIC), total alkalinity, pH on sea water scale and other hydrographic and chemical variables collected from discrete samples and profile observations during NOAA Ship Ronald H. Brown cruise along the Global Ocean Ship-Based Hydrographic Investigation Program (GO-SHIP) Section I07N (EXPOCODE 33RO20180423) in the Indian Ocean on from 2018-04-23 to 2018-06-06 (NCEI Accession 0189249) 2019-05-22 publication 2021-03-18 revision 2019-05-20 creation International DOI Foundation (IDF) 10.25921/yyb2-7m52 NOAA National Centers for Environmental Information gov.noaa.nodc:0189249 NCEI Archive Management System 0189249 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 Robert M. Key Princeton University key@princeton.edu http://www.princeton.edu HTTP Princeton University website Institution web page information resourceProvider Princeton University http://www.princeton.edu HTTP Princeton University website Institution web page information resourceProvider Denis Volkov NOAA Atlantic Oceanographic and Meteorological Laboratory (AOML) denis.volkov@noaa.gov https://www.aoml.noaa.gov/ HTTPS NOAA Atlantic Oceanographic and Meteorological Laboratory (AOML) website Institution web page information principalInvestigator Rik Wanninkhof NOAA Atlantic Oceanographic and Meteorological Laboratory (AOML) Rik.Wanninkhof@noaa.gov https://www.aoml.noaa.gov/ HTTPS NOAA Atlantic Oceanographic and Meteorological Laboratory (AOML) website Institution web page information principalInvestigator Richard Feely NOAA Pacific Marine Environmental Laboratory (PMEL) Richard.A.Feely@noaa.gov https://www.pmel.noaa.gov/ HTTPS NOAA Pacific Marine Environmental Laboratory (PMEL) website Institution web page information principalInvestigator Frank J. Millero University of Miami Rosenstiel School of Marine and Atmospheric Science (RSMAS) fmillero@rsmas.miami.edu http://www.rsmas.miami.edu HTTP University of Miami Rosenstiel School of Marine and Atmospheric Science (RSMAS) website Institution web page information principalInvestigator Dennis A. Hansell University of Miami Rosenstiel School of Marine and Atmospheric Science (RSMAS) dhansell@rsmas.miami.edu http://www.rsmas.miami.edu HTTP University of Miami Rosenstiel School of Marine and Atmospheric Science (RSMAS) website Institution web page information principalInvestigator Robert M. Key Princeton University key@princeton.edu http://www.princeton.edu HTTP Princeton University website Institution web page information principalInvestigator Molly O. Baringer NOAA Atlantic Oceanographic and Meteorological Laboratory (AOML) Molly.Baringer@noaa.gov https://www.aoml.noaa.gov/ HTTPS NOAA Atlantic Oceanographic and Meteorological Laboratory (AOML) website Institution web page information collaborator John Bullister NOAA Pacific Marine Environmental Laboratory (PMEL) John.L.Bullister@noaa.gov https://www.pmel.noaa.gov/ HTTPS NOAA Pacific Marine Environmental Laboratory (PMEL) website Institution web page information collaborator Jia-Zhong Zhang NOAA Atlantic Oceanographic and Meteorological Laboratory (AOML) Jia-Zhong.Zhang@noaa.gov https://www.aoml.noaa.gov/ HTTPS NOAA Atlantic Oceanographic and Meteorological Laboratory (AOML) website Institution web page information collaborator NOAA Pacific Marine Environmental Laboratory (PMEL) Gregory.C.Johnson@noaa.gov https://www.pmel.noaa.gov/ HTTPS NOAA Pacific Marine Environmental Laboratory (PMEL) website Institution web page information collaborator Chris Langdon University of Miami Rosenstiel School of Marine and Atmospheric Science (RSMAS) clangdon@rsmas.miami.edu http://www.rsmas.miami.edu HTTP University of Miami Rosenstiel School of Marine and Atmospheric Science (RSMAS) website Institution web page information collaborator Calvin Mordy University of Washington Cooperative Institute for Climate, Ocean and Ecosystem Studies (CICOES) https://cicoes.uw.edu/ HTTPS University of Washington Cooperative Institute for Climate, Ocean and Ecosystem Studies (CICOES) website Institution web page information collaborator Ann McNichol Woods Hole Oceanographic Institution (WHOI) http://www.whoi.edu HTTP Woods Hole Oceanographic Institution (WHOI) website Institution web page information collaborator Volkov, Denis L. NOAA Atlantic Oceanographic and Meteorological Laboratory (AOML) https://www.aoml.noaa.gov/ HTTPS NOAA Atlantic Oceanographic and Meteorological Laboratory (AOML) website Institution web page information author Wanninkhof, Rik NOAA Atlantic Oceanographic and Meteorological Laboratory (AOML) https://www.aoml.noaa.gov/ HTTPS NOAA Atlantic Oceanographic and Meteorological Laboratory (AOML) website Institution web page information author Feely, Richard A. NOAA Pacific Marine Environmental Laboratory (PMEL) https://www.pmel.noaa.gov/ HTTPS NOAA Pacific Marine Environmental Laboratory (PMEL) website Institution web page information author Millero, Frank J. University of Miami Rosenstiel School of Marine and Atmospheric Science (RSMAS) http://www.rsmas.miami.edu HTTP University of Miami Rosenstiel School of Marine and Atmospheric Science (RSMAS) website Institution web page information author Hansell, Dennis A. University of Miami Rosenstiel School of Marine and Atmospheric Science (RSMAS) http://www.rsmas.miami.edu HTTP University of Miami Rosenstiel School of Marine and Atmospheric Science (RSMAS) website Institution web page information author Key, Robert M. Princeton University key@princeton.edu http://www.princeton.edu HTTP Princeton University website Institution web page information author Bullister, John L. NOAA Pacific Marine Environmental Laboratory (PMEL) https://www.pmel.noaa.gov/ HTTPS NOAA Pacific Marine Environmental Laboratory (PMEL) website Institution web page information author McNichol, Ann Woods Hole Oceanographic Institution (WHOI) http://www.whoi.edu HTTP Woods Hole Oceanographic Institution (WHOI) website Institution web page information author Baringer, Molly O. NOAA Atlantic Oceanographic and Meteorological Laboratory (AOML) Molly.Baringer@noaa.gov https://www.aoml.noaa.gov/ HTTPS NOAA Atlantic Oceanographic and Meteorological Laboratory (AOML) website Institution web page information author Johnson, Gregory C. NOAA Pacific Marine Environmental Laboratory (PMEL) https://www.pmel.noaa.gov/ HTTPS NOAA Pacific Marine Environmental Laboratory (PMEL) website Institution web page information author Langdon, Chris University of Miami Rosenstiel School of Marine and Atmospheric Science (RSMAS) http://www.rsmas.miami.edu HTTP University of Miami Rosenstiel School of Marine and Atmospheric Science (RSMAS) website Institution web page information author Mordy, Calvin University of Washington Cooperative Institute for Climate, Ocean and Ecosystem Studies (CICOES) https://cicoes.uw.edu/ HTTPS University of Washington Cooperative Institute for Climate, Ocean and Ecosystem Studies (CICOES) website Institution web page information author Zhang, Jia-Zhong NOAA Atlantic Oceanographic and Meteorological Laboratory (AOML) https://www.aoml.noaa.gov/ HTTPS NOAA Atlantic Oceanographic and Meteorological Laboratory (AOML) website Institution web page information author NOAA Atlantic Oceanographic and Meteorological Laboratory (AOML) https://www.aoml.noaa.gov/ HTTPS NOAA Atlantic Oceanographic and Meteorological Laboratory (AOML) website Institution web page information contributor NOAA Pacific Marine Environmental Laboratory (PMEL) https://www.pmel.noaa.gov/ HTTPS NOAA Pacific Marine Environmental Laboratory (PMEL) website Institution web page information contributor tableDigital This dataset includes discrete profile measurements of Dissolved inorganic carbon (DIC), total alkalinity, pH on sea water scale, dissolved organic carbon (DOC), chlorofluorocarbons (CFC-11, CFC-12), temperature, salinity, oxygen, nutrients, and other variables measured during NOAA Ship Ronald H. Brown cruise along the Global Ocean Ship-Based Hydrographic Investigation Program (GO-SHIP) Section I07N (EXPOCODE 33RO20180423) in the Indian Ocean on from 2018-04-23 to 2018-06-06. Hydrographic measurements were carried out along the I07N section in the western Indian Ocean in April-June 2018 under the auspices of GO-SHIP. The unique aspect of the 2018 I07N research cruise is that it was the first reoccupation of the I07N section since 1995. The section was not revisited for about 23 years because of the rise of piracy in the region. The goal of this effort is to occupy a set of hydrographic transects over the global ocean with full water column measurements to study physical and hydrographic trends and variability over time Funding Information: NSF, NOAA (Repeat Hydrography Sections Observations) 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 NCEI Accession 0189249 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. https://www.ncei.noaa.gov/access/metadata/landing-page/bin/gfx?id=gov.noaa.nodc:0189249 Preview graphic PNG 0189249 NCEI ACCESSION NUMBER 2019-01-24 publication CARBON - CARBON 14 ASSIMILATION CHLOROFLUOROCARBON (CFC) DISSOLVED INORGANIC CARBON (DIC) NUTRIENTS OXYGEN pH SALINITY sulfur hexafluoride (SF6) total alkalinity WATER TEMPERATURE theme NODC DATA TYPES THESAURUS carbon dioxide (CO2) gas analyzer CTD Niskin bottle pH sensor salinometer titrator instrument NODC INSTRUMENT TYPES THESAURUS chemical discrete sample physical profile theme NODC OBSERVATION TYPES THESAURUS NOAA Ship Ronald H. Brown platform NODC PLATFORM NAMES THESAURUS NOAA Atlantic Oceanographic and Meteorological Laboratory NOAA Pacific Marine Environmental Laboratory dataCentre NODC COLLECTING INSTITUTION NAMES THESAURUS Princeton University dataCentre NODC SUBMITTING INSTITUTION NAMES THESAURUS The Global Ocean Ship-based Hydrographic Investigations Program (GO-SHIP) project NODC PROJECT NAMES THESAURUS Indian Ocean place NODC SEA AREA NAMES THESAURUS oceanography theme WMO_CategoryCode 2012-09-15 publication DOC/NOAA/OAR/AOML > Atlantic Oceanographic and Meteorological Laboratory, OAR, NOAA, U.S. Department of Commerce DOC/NOAA/OAR/PMEL > Pacific Marine Environmental Laboratory, OAR, NOAA, U.S. Department of Commerce dataCentre Global Change Master Directory (GCMD) Data Center Keywords 2026 revision 23 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 I07N.2018 project Cruise ID 33RO20180423 project EXPOCODE Ocean Carbon and Acidification Data System (OCADS) Project project Ocean Acidification Search Keywords GO-SHIP I07N project Reference Section ID The Global Ocean Ship-based Hydrographic Investigations Program (GO-SHIP) project Research Projects EARTH SCIENCE > ATMOSPHERE > ATMOSPHERIC CHEMISTRY > HALOCARBONS AND HALOGENS > CHLOROFLUOROCARBONS EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > ALKALINITY EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > CARBON EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > DISSOLVED GASES EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > HYDROCARBONS EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > INORGANIC CARBON EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > NUTRIENTS EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > OXYGEN EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > PH EARTH SCIENCE > OCEANS > OCEAN TEMPERATURE > WATER TEMPERATURE EARTH SCIENCE > OCEANS > SALINITY/DENSITY > SALINITY theme Global Change Master Directory (GCMD) Science Keywords 2026 revision 23 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 Discrete measurement theme OCADS Study Type ALKALI CFCs/SF6 CTDOXY CTDSAL CTDTMP Dissolved Organic Carbon OXYGEN PH_SWS SALNTY SILCAT, NITRAT, NITRIT PHSPHT TCARBN theme Provider Variable Abbreviations CO2 ANALYZERS > CO2 ANALYZERS CTD > Conductivity, Temperature, Depth NISKIN BOTTLES PH METERS > PH METERS SALINOMETERS instrument Global Change Master Directory (GCMD) Instrument Keywords 2026 revision 23 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 Ships platform Global Change Master Directory (GCMD) Platform Keywords 2026 revision 23 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 Ronald H. Brown (call sign: WTEC, ICES code: 33RO, 1997-) platform ICES/SeaDataNet Ship Codes OCEAN > INDIAN OCEAN place Global Change Master Directory (GCMD) Location Keywords 2026 revision 23 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 Indian Ocean place Provider Geographic Names accessLevel: Public otherRestrictions Cite as: Volkov, Denis L.; Wanninkhof, Rik; Feely, Richard A.; Millero, Frank J.; Hansell, Dennis A.; Key, Robert M.; Bullister, John L.; McNichol, Ann; Baringer, Molly O.; Johnson, Gregory C.; Langdon, Chris; Mordy, Calvin; Zhang, Jia-Zhong (2019). Dissolved inorganic carbon (DIC), total alkalinity, pH on sea water scale and other hydrographic and chemical variables collected from discrete samples and profile observations during NOAA Ship Ronald H. Brown cruise along the Global Ocean Ship-Based Hydrographic Investigation Program (GO-SHIP) Section I07N (EXPOCODE 33RO20180423) in the Indian Ocean on from 2018-04-23 to 2018-06-06 (NCEI Accession 0189249). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.25921/yyb2-7m52. 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. GO-SHIP Repeat Hydrography Section I07 2022 publication https://www.ncei.noaa.gov/access/ocean-carbon-acidification-data-system/oceans/RepeatSections/goship_i07n.html HTTPS https://www.ncei.noaa.gov/access/ocean-carbon-acidification-data-system/oceans/RepeatSections/goship_i07n.html Related resource information NOAA National Centers for Environmental Information (NCEI) publisher documentDigital crossReference project 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 2022-04 publication https://www.ncei.noaa.gov/products/ocean-carbon-acidification-data-system HTTPS https://www.ncei.noaa.gov/products/ocean-carbon-acidification-data-system OCADS website information NOAA National Centers for Environmental Information author NOAA National Centers for Environmental Information (NCEI) publisher documentDigital [accessed 2024-02-08] crossReference program eng; USA utf8 environment oceans 39 69.7 -30 18.3 2018-04-23 2018-06-06 In this accession, NCEI has archived multiple versions of these data. The latest (and best) version of these data has the largest version number. 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. 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Originator data format 65.48 https://www.ncei.noaa.gov/data/oceans/ncei/ocads/metadata/0189249.html HTTPS Web browser Project Metadata Navigate directly to the URL for a descriptive web page with download links. information https://doi.org/10.25921/yyb2-7m52 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/189249 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/189249 HTTPS Web browser HTTPS Navigate directly to the URL for data access and direct download. download ftp://ftp-oceans.ncei.noaa.gov/nodc/archive/arc0137/0189249/ 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 0189249 v1.1 was published. 2019-05-22T22:05:51Z NCEI Accession 0189249 v1.1 publication https://www.ncei.noaa.gov/archive/accession/0189249/1.1 HTTPS NCEI Accession 0189249 v1.1 published 2019-05-22T22:05:51Z download NCEI Accession 0189249 was revised and v2.2 was published. Updates were received for this dataset. These updates were copied into the data/0-data/ directory of this accession. These updates may provide additional files or replace obsolete files. This 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. 2019-07-03T18:39:01Z NCEI Accession 0189249 v2.2 publication https://www.ncei.noaa.gov/archive/accession/0189249/2.2 HTTPS NCEI Accession 0189249 v2.2 published 2019-07-03T18:39:01Z download NCEI Accession 0189249 was revised and v3.3 was published. Updates were received for this dataset. These updates were copied into the data/0-data/ directory of this accession. These updates may provide additional files or replace obsolete files. This 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. 2021-03-18T23:12:05Z NCEI Accession 0189249 v3.3 publication https://www.ncei.noaa.gov/archive/accession/0189249/3.3 HTTPS NCEI Accession 0189249 v3.3 published 2021-03-18T23:12:05Z download dataset Parameter or Variable: Dissolved Inorganic Carbon; Abbreviation: TCARBN; Unit: UMOL/KG; Observation type: Discrete, bottle; Measured or calculated: Measured; Sampling instrument: Niskin Bottles; Analyzing instrument: Coulometric measurement system (SOMMA); Detailed sampling and analyzing information: The analysis was done by coulometry with two analytical systems (AOML 3 and AOML 4) used simultaneously on the cruise. Each system consisted of a coulometer (CM5015 UIC Inc) coupled with a Dissolved Inorganic Carbon Extractor (DICE). The DICE system 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). In 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- 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 change during the titration.; Replicate information: Duplicate samples from the same niskin, were measured near the beginning; middle and end of each cell.; Standardization description: Each coulometer was calibrated by injecting aliquots of pure CO2 (99.999%) by means of an 8-port valve (Wilke et al., 1993) outfitted with two calibrated sample loops of different sizes (~1ml and ~2ml). The instruments were each separately calibrated at the beginning of each cell with a minimum of two sets of these gas loop injections. The accuracy of the DIC measurement is determined with the use of standards (Certified Reference Materials (CRMs), consisting of filtered and UV irradiated seawater) supplied by Dr. A. Dickson of Scripps Institution of Oceanography (SIO). The CRM accuracy is determined manometrically on land in San Diego and the DIC data reported to the data base have been corrected to this batch 169 CRM value. The CRM certified value for this batch is 2063.31 μmol/kg1.; CRM manufacturer: Andrew Dickson Laboratory at SIO; CRM batch number: 169; Preservation method: mercuric chloride solution; Preservative volume: 100 mL; Uncertainty: Including the duplicates, over 3047 samples were analyzed from 124 CTD casts for dissolved inorganic carbon (DIC) which means that there is a DIC value for approximately 96% of the niskins tripped. The DIC data reported to the database directly from the ship are to be considered preliminary until a more thorough quality assurance can be completed shore side.; Quality flag convention: WOCE quality control flags are used: 2 = good value, 3 = questionable value, 4 = bad value; 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.; Researcher name: Rik Wanninkhof, Richard Feely; Researcher institution: AOML, PMEL Parameter or Variable: Total alkalinity; Abbreviation: ALKALI; Unit: UMOL/KG; Observation type: Discrete, bottle; Measured or calculated: Measured; Sampling instrument: Niskin Bottles; Type of titration: HCl titration in close cell; Cell type (open or closed): closed; Curve fitting method: Levenberg-Marquardt nonlinear least-squares fit of full titration; Detailed sampling and analyzing information: The sample TA was evaluated from the proton balance at the alkalinity equivalence point, pH ≈ 4.5 at 25°C and zero ionic strength using a closed cell HCl titration. This method utilizes a multi-point hydrochloric acid titration of seawater (Dickson 1981). The instrument program uses a Levenberg-Marquardt nonlinear least-squares algorithm to calculate the TA and DIC from the potentiometric titration data. The program is patterned after those developed by Dickson (1981), Johansson and Wedborg (1982), and U.S. Department of Energy (DOE) (1994). The least-squares algorithm of the potentiometric titrations not only give values of TA but also those of DIC, initial pH as calculated from the initial EMF, the standard potential of the electrode system (E0), and the first dissociation constant of CO2 at the given temperature and ionic strength (pK1). Two titration systems, A and B were used for TA analysis. Each of them consists of a Metrohm 765 Dosimat titrator, an Orion 720A, or 720A+, pH meter and a custom designed plexiglass water-jacketed titration cell (Millero et al, 1993). The titration cell allows for the titration to be conducted in a closed system by incorporating a 5mL ground glass syringe to allow for increased volume with acid addition. The seawater samples were temperature equilibrated to a constant temperature of 25 ± 0.1°C with a water bath (Thermo, HAAKE A10). The electrodes used to measure the EMF of the sample during a titration were a ROSS glass pH electrode (Orion, model 810100) and a double junction Ag, AgCl reference electrode (Orion, model 900200). The water-jacketed cell is similar to the cells used by Bradshaw and Brewer (1988) except a larger volume (~200 ml) is employed to increase the precision. Each cell has a solenoid fill and drain valve which increases the reproducibility of the volume of sample contained in the cell. A typical titration records the stable solution EMF (deviation less than 0.09 mV) and adds enough acid to change the voltage a pre-assigned increment (~13 mV). A full titration (~25 points) takes about 20 minutes. A 6 port valve (VICI, Valco EMTCA-CE) allows 6 samples to be loaded into the instrument and successively measured.; Replicate information: Duplicates samples from the same niskin were measured at each station, 12.6% of samples. The absolute standard deviations of duplicates were 0.85 umol/kg and 1.68 umol/kg for the two titration cells.; Standardization description: A single 50-L batch of ~0.25 m HCl acid was prepared in 0.45 m NaCl by dilution of concentrated HCl (AR Select, Mallinckrodt), to yield a total ionic strength similar to seawater of salinity 35.0 (I = 0.7 M). The acid is standardized with alkalinity titrations on seawater of known alkalinity (certified reference material, CRM, provided by Dr. Andrew Dickson, Marine Physical Laboratory, La Jolla, California). The calibrated normality of the acid used was 0.24494 ± 0.0001 N HCl. The acid is stored in 500-ml glass bottles sealed with Apiezon® M grease for use at sea.; Standardization frequency: The reproducibility and precision of measurements are checked using low nutrient surface seawater collected from the ship’s underway seawater system, used as a substandard, and Certified Reference Material (Dr. Andrew Dickson, Marine Physical Laboratory, La Jolla, California). The CRM was utilized to account for instrument drift over the duration of the cruise and to maintain measurement precision. At each station, the drift and precision of each system was monitored by alternate measurements of either a CRM or a low nutrient surface water sample. Duplicate analyses (2 samples taken from the same Niskin bottle) provided additional quality assurance. Three duplicates samples were collected at each station; one set is analyzed on system A, one on system B, and one split between systems A and B. This provided a measure of the precision on both the same system and between systems. Laboratory calibrations of the Dosimat burette system with water indicate the systems deliver 3.000 ml of acid (the approximate value for a titration of 200 ml of seawater) to a precision of ± 0.0004 ml, resulting in an error of ±0.3 μmol/kg in TA. All samples were analyzed less than 12 hours after collection.; CRM manufacturer: Certified Reference Material (Dr. Andrew Dickson, Marine Physical Laboratory, La Jolla, California); CRM batch number: CRM batch 169; Uncertainty: +/- 1.91 umol/kg based on CRM measurements and duplicates. Measurements were made on CRM batch 169. The difference between the measured and certified values will be used to correct the TA values produced on each system, however, no correction has been made on preliminary data at this time. Eighteen different batches of low nutrient surface water were used. They all had standard deviations of less than 3 μmol/kg, and were generally less than 2 μmol/kg.; Quality flag convention: WOCE quality control flags are used: 2 = good value, 3 = questionable value, 4 = bad value; Method reference: Millero, F.J., J.-Z. Zhang, K, Lee, and D.M. Campbell, 1993: Titration alkalinity of seawater. Mar. Chem., 44, 153-165.; Researcher name: Frank Millero; Researcher institution: RSMAS, University of Miami Parameter or Variable: pH; Abbreviation: PH_SWS; pH scale: Sea Water Scale; Observation type: Discrete, bottle; Measured or calculated: Measured; Sampling instrument: Niskin Bottles; Analyzing instrument: Agilent 8453 spectrophotometer; Temperature of pH measurement: 25°C; Detailed sampling and analyzing information: pH (μmol/kg seawater) on the seawater scale was measured using an Agilent 8453 spectrophotometer according to the methods outlined by Clayton and Byrne (1993). An RTE10 water bath maintained spectrophotometric cell temperature at 25°C. A 10 cm micro-flow through cell (Sterna, Inc) was filled automatically using a Kloehn 6v syringe pump. The purified sulfonephthalein indicator m-cresol purple (mCP) was also injected automatically by the Kloehn 6v syringe pump into the spectrophotometric cells, and the absorbance of light was measured at four different wavelengths (434 nm, 578 nm, 730 nm, and 488 nm). The ratios of absorbances at the different wavelengths were used to calculate pH on the total and seawater scales using the equations of Liu et al (2011). The equations of Dickson and Millero (1987), Dickson and Riley (1979), and Dickson (1990) were used to convert pH from the total to seawater scale. The isobestic point (488nm) will be used for the indicator correction. Salinity data were obtained from the conductivity sensor on the CTD. These data were later corroborated by shipboard measurements. Temperature of the samples was measured immediately after spectrophotometric measurements using a Fluke Hart 1523 digital platinum resistance thermometer. Due to ship berthing limitations, only one technician was available to analyze pH samples. All samples were analyzed, however, within 12 hours of collection.; Replicate information: Duplicates samples from the same niskin were measured on 12.6% of samples. The absolute standard deviation of duplicates was 0.0013.; Standardization description: The precision of the data can be accessed from measurements of duplicate samples, certified reference material (CRM) Batch 169 (Dr. Andrew Dickson, UCSD) and TRIS buffers (Ramette et al. 1977). The measurement of CRM and TRIS was alternated at each station.; Standardization frequency: CRMs and TRIS on alternating stations; At what temperature was pH reported: at SST; Uncertainty: +/- 0.0010 based on CRMs and +/- 0.0040 based on TRIS measurements; Quality flag convention: WOCE quality control flags are used: 2 = good value, 3 = questionable value, 4 = bad value; Method reference: Clayton, T.D., and R.H. Byrne, 1993: Spectrophotometric seawater pH measurements: Total hydrogen ion concentration scale calibration of m-cresol purple and at-sea results. Deep-Sea Res., 40, 2315-2329.; Researcher name: Frank Millero; Researcher institution: RSMAS, University of Miami Parameter or Variable: DOC; Abbreviation: Dissolved Organic Carbon; Unit: UMOL/KG; Observation type: Bottle, discrete; Sampling instrument: CTD, Niskin Bottlesx; Quality flag convention: WOCE quality control flags are used: 2 = good value, 3 = questionable value, 4 = bad value; Researcher name: Dennis Hansell; Researcher institution: RSMAS Parameter or Variable: CTD Temperature; Abbreviation: CTDTMP; Unit: degrees celcius; Observation type: CTD sensor; Sampling instrument: CTD; Analyzing instrument: CTD; Quality flag convention: WOCE quality control flags are used: 2 = good value, 3 = questionable value, 4 = bad value; Researcher name: Kristene McTaggart; Researcher institution: PMEL Parameter or Variable: CTD Salinity; Abbreviation: CTDSAL; Observation type: CTD sensor; Sampling instrument: CTD; Analyzing instrument: CTD; Quality flag convention: WOCE quality control flags are used: 2 = good value, 3 = questionable value, 4 = bad value; Researcher name: Kristene McTaggart; Researcher institution: PMEL Parameter or Variable: Bottle Salinity; Abbreviation: SALNTY; Observation type: Bottle, discrete; Sampling instrument: CTD; Quality flag convention: WOCE quality control flags are used: 2 = good value, 3 = questionable value, 4 = bad value; Researcher name: Andrew Stefanick; Researcher institution: AOML Parameter or Variable: CTD Oxygen; Abbreviation: CTDOXY; Unit: UMOL/KG; Observation type: CTD sensor; Sampling instrument: CTD; Quality flag convention: WOCE quality control flags are used: 2 = good value, 3 = questionable value, 4 = bad value; Researcher name: Kristene McTaggart; Researcher institution: PMEL Parameter or Variable: Bottle Oxygen; Abbreviation: OXYGEN; Unit: UMOL/KG; Observation type: Bottle, discrete; Sampling instrument: CTD; Quality flag convention: WOCE quality control flags are used: 2 = good value, 3 = questionable value, 4 = bad value; Researcher name: Christopher Langdon; Researcher institution: UM/RSMAS Parameter or Variable: Nutrients; Abbreviation: SILCAT, NITRAT, NITRIT PHSPHT; Unit: UMOL/KG; Observation type: Bottle, discrete; Sampling instrument: CTD; Quality flag convention: WOCE quality control flags are used: 2 = good value, 3 = questionable value, 4 = bad value; Researcher name: Jia-Zhong Zhang, Calvin Mordy; Researcher institution: AOML, PMEL Parameter or Variable: Chlorofluorocarbon; Abbreviation: CFCs/SF6; Unit: PMOL/KG; Observation type: Bottle, discrete; Sampling instrument: CTD; Quality flag convention: WOCE quality control flags are used: 2 = good value, 3 = questionable value, 4 = bad value; Researcher name: John Bullister; Researcher institution: PMEL asNeeded Metadata are developed, maintained and distributed by NCEI. Updates are performed as needed to maintain currentness. NOAA National Centers for Environmental Information custodian carbon dioxide (CO2) gas analyzer carbon dioxide (CO2) gas analyzer measures gaseous carbon dioxide Carbon dioxide gas analyzer has often been referred to as LI-COR, because a lot of researchers choose to use products manufactured by LI-COR incorporation for their carbon dioxide measurement. The main component of a carbon dioxide analyzer is a nondispersive infrared (NDIR) spectroscopic sensors to detect CO2 in a gaseous environment by its characteristic absorption. Carbon dioxide (CO2) gas analyzer works together with carbon dioxide (CO2) equilibrator (insttypes_id 184) to measure carbon dioxide in the water. To measure water carbon dioxide, water needs to be continuously supplied to a showerhead inside an equilibrator. As the water flows through the equilibrator chamber, dissolved carbon dioxide exchanges quickly with air in the headspace. This air is then sampled by the carbon dioxide analyzer to determine the mole fraction of CO2 in water. CTD CTD Conductivity-Temperature-Depth probe Niskin bottle Niskin bottle Device for obtaining samples of seawater at a specific depth Why special entry for Niskin bottle but no entry for Nansen bottle? pH sensor pH sensor generic meter used to measure pH Any of a class of instruments used to quantify pH in a water or other type of sample. salinometer salinometer generic salinometer use salinometer when the instrument type used is unclear but the data include salinity measurements titrator titrator titrator NOAA Ship Ronald H. Brown Updated information from ICES for UNITED STATES platform Ronald H. Brown Flag : UNITED STATES - US (ISO Country Code) Call Sign : WTEC Title : NOAA Ship Platform Class : Research vessel IMO : 9105786 Pennant : R 104 Commissioned Date : 1997-07-19 Current Length : 83.5 Built : 1997 Information Source : http://www.moc.noaa.gov/rb/index.html (URL) Lloyds URL : http://www.seasearcher.com/lmiu/vessels/overview.htm?vesselID=277516 *General Comments:* Name RESEARCHER II planned during build was never used.