gov.noaa.nodc:0144341 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 2025-11-29T06:08:38Z ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) Dissolved inorganic carbon, alkalinity, temperature, salinity and other variables collected from discrete sample and profile observations using Alkalinity titrator, CTD and other instruments from POLARSTERN in the South Atlantic Ocean from 2012-01-07 to 2012-03-11 (NCEI Accession 0144341) 2016-02-26 publication 2016-02-26 creation International DOI Foundation (IDF) 10.3334/cdiac/otg.clivar_a12_06aq20120107 NOAA National Centers for Environmental Information gov.noaa.nodc:0144341 NCEI Archive Management System 0144341 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 Alex Kozyr NOAA National Centers for Environmental Information (NCEI) Alex.Kozyr@noaa.gov resourceProvider Carbon Dioxide Information Analysis Center (CDIAC) resourceProvider Toste Tanhua GEOMAR Helmholtz Centre for Ocean Research Kiel (GEOMAR) ttanhua@ifm-geomar.de http://www.geomar.de/ HTTP GEOMAR Helmholtz Centre for Ocean Research Kiel (GEOMAR) website Institution web page information principalInvestigator Mario Hoppema Alfred-Wegener Institute, Helmholtz Centre for Polar and Marine Research (AWI) Mario.Hoppema@awi.de https://www.awi.de/ HTTPS Alfred-Wegener Institute, Helmholtz Centre for Polar and Marine Research (AWI) website Institution web page information principalInvestigator Monika Rhein University of Bremen https://www.uni-bremen.de/ HTTPS University of Bremen website Institution web page information collaborator Hein J. W. de Baar Royal Netherlands Institute for Sea Research (NIOZ) http://www.nioz.nl/ HTTP Royal Netherlands Institute for Sea Research (NIOZ) website Institution web page information collaborator Elizabeth M. Jones University of Groningen (RUG) https://www.rug.nl/ HTTPS University of Groningen (RUG) website Institution web page information collaborator Dieter Wolf-Gladrow collaborator Wolf-Gladrow, Dieter author Hoppema, Mario Alfred-Wegener Institute, Helmholtz Centre for Polar and Marine Research (AWI) https://www.awi.de/ HTTPS Alfred-Wegener Institute, Helmholtz Centre for Polar and Marine Research (AWI) website Institution web page information author Tanhua, Toste GEOMAR Helmholtz Centre for Ocean Research Kiel (GEOMAR) http://www.geomar.de/ HTTP GEOMAR Helmholtz Centre for Ocean Research Kiel (GEOMAR) website Institution web page information author de Baar, Hein J. W. Royal Netherlands Institute for Sea Research (NIOZ) http://www.nioz.nl/ HTTP Royal Netherlands Institute for Sea Research (NIOZ) website Institution web page information author Jones, Elizabeth M. University of Groningen (RUG) https://www.rug.nl/ HTTPS University of Groningen (RUG) website Institution web page information author Rhein, Monika University of Bremen https://www.uni-bremen.de/ HTTPS University of Bremen website Institution web page information author GEOMAR Helmholtz Centre for Ocean Research Kiel (GEOMAR) http://www.geomar.de/ HTTP GEOMAR Helmholtz Centre for Ocean Research Kiel (GEOMAR) website Institution web page information contributor Alfred-Wegener Institute, Helmholtz Centre for Polar and Marine Research (AWI) https://www.awi.de/ HTTPS Alfred-Wegener Institute, Helmholtz Centre for Polar and Marine Research (AWI) website Institution web page information contributor tableDigital This dataset includes discrete sample and profile data collected from POLARSTERN in the South Atlantic Ocean from 2012-01-07 to 2012-03-11. These data include CHLOROFLUOROCARBON-12 (CFC-12), DISSOLVED INORGANIC CARBON (DIC), DISSOLVED OXYGEN, HYDROSTATIC PRESSURE, NITRATE, NITRITE, Potential temperature (theta), SALINITY, SULFUR HEXAFLUORIDE (SF6), TOTAL ALKALINITY (TA), WATER TEMPERATURE, phosphate and silicate. The instruments used to collect these data include Alkalinity titrator, CTD, Coulometer for DIC measurement, bottle and pH sensors. These data were collected by Mario Hoppema of Alfred Wegener Institute for Polar and Marine Research (AWI) and Toste Tanhua of GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany as part of the CLIVAR_A12_06AQ20120107 dataset. CDIAC associated the following cruise ID(s) with this dataset: ANTXXVIII/3 The International CLIVAR Global Ocean Carbon and Repeat Hydrography Program carries out a systematic and global re-occupation of select WOCE/JGOFS hydrographic sections to quantify changes in storage and transport of heat, fresh water, carbon dioxide (CO2), and related parameters. This dataset is available to the public for a wide variety of uses including scientific research and analysis. Funding Information: Deutsche Forschungsgemeinschaft (DFG) (“Antarctic Research with comparative investigations in Arctic ice areas” priority program: Carbon and transient tracer dynamics: A bi-polar view on Southern Ocean eddies and the changing Arctic Ocean, TA 317/5, HO 4680/1) completed historicalArchive NOAA National Centers for Environmental Information ncei.info@noaa.gov https://www.ncei.noaa.gov/contact HTTPS NCEI Contact Information Information for contacts at NCEI. information pointOfContact asNeeded https://www.ncei.noaa.gov/access/metadata/landing-page/bin/gfx?id=gov.noaa.nodc:0144341 Preview graphic PNG 0144341 NCEI ACCESSION NUMBER 2016-02-26 publication CHLOROFLUOROCARBON-12 (CFC-12) DISSOLVED INORGANIC CARBON (DIC) DISSOLVED OXYGEN HYDROSTATIC PRESSURE NITRATE NITRITE phosphate Potential temperature (theta) SALINITY silicate sulfur hexafluoride (SF6) total alkalinity WATER TEMPERATURE theme NODC DATA TYPES THESAURUS bottle coulometer for DIC measurement CTD pH sensor titrator instrument NODC INSTRUMENT TYPES THESAURUS discrete sample profile theme NODC OBSERVATION TYPES THESAURUS RV Polarstern platform NODC PLATFORM NAMES THESAURUS Alfred-Wegener Institute, Helmholtz Centre for Polar and Marine Research GEOMAR Helmholtz Centre for Ocean Research Kiel dataCentre NODC COLLECTING INSTITUTION NAMES THESAURUS Carbon Dioxide Information Analysis Center dataCentre NODC SUBMITTING INSTITUTION NAMES THESAURUS South Atlantic Ocean place NODC SEA AREA NAMES THESAURUS oceanography theme WMO_CategoryCode 2012-09-15 publication AWI > Alfred Wegener Institute for Polar and Marine Research DE/GEOMAR > GEOMAR - Helmholtz Centre for Ocean Research Kiel, Germany DOE/ORNL/ESD/CDIAC > Carbon Dioxide Information Analysis Center, Environmental Sciences Division, Oak Ridge National Laboratory, U. S. Department of Energy 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 ANTXXVIII/3 project Cruise ID 06AQ20120107 project EXPOCODE Ocean Carbon and Acidification Data System (OCADS) Project project Ocean Acidification Search Keywords A12 project Reference Section ID EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > ALKALINITY EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > INORGANIC CARBON EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > NITRATE EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > NITRITE EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > OXYGEN EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > PHOSPHATE EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > SILICATE EARTH SCIENCE > OCEANS > OCEAN PRESSURE > WATER PRESSURE EARTH SCIENCE > OCEANS > OCEAN TEMPERATURE > POTENTIAL TEMPERATURE 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 Profile theme OCADS Study Type ALKALI CFC-12 CTDSAL CTD_TMP DIC NITRAT NITRIT OXYGEN PHSPHT SF6 SILCAT TA TCARBN THETA theme Provider Variable Abbreviations COULOMETERS CTD > Conductivity, Temperature, Depth PH METERS > PH METERS 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 Polarstern (call sign: DBLK, ICES code: 06AQ, 1982-) platform ICES/SeaDataNet Ship Codes OCEAN > ATLANTIC OCEAN > SOUTH ATLANTIC 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 Atlantic Ocean place Provider Geographic Names accessLevel: Public otherRestrictions Cite as: Wolf-Gladrow, Dieter; Hoppema, Mario; Tanhua, Toste; de Baar, Hein J. W.; Jones, Elizabeth M.; Rhein, Monika (2016). Dissolved inorganic carbon, alkalinity, temperature, salinity and other variables collected from discrete sample and profile observations using Alkalinity titrator, CTD and other instruments from POLARSTERN in the South Atlantic Ocean from 2012-01-07 to 2012-03-11 (NCEI Accession 0144341). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.3334/cdiac/otg.clivar_a12_06aq20120107. 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. Wolf-Gladrow, D., M. Hoppema, , T. Tanhua, H. de Baar, E. Jones and M. Rhein (2016). Carbon Dioxide, Hydrographic, and Chemical Data Obtained During the R/V Polarstern Cruise ANT_XXVIII/3 in the Southern Ocean on CLIVAR Repeat Hydrography Section A12 (7 January - 11 March, 2012). Carbon Dioxide Information Analysis Center, Oak Ridge National Laboratory, Oak Ridge, Tennessee, CLIVAR_A12_06AQ20120107. 2016 publication CLIVAR_A12_06AQ20120107 Wolf-Gladrow, D., M. Hoppema, , T. Tanhua, H. de Baar, E. Jones and M. Rhein author Carbon Dioxide Information Analysis Center (CDIAC) publisher Ocean CO2 [retrieved from http://cdiac.ornl.gov/ftp/oceans/CLIVAR/A12_06AQ20120107/] crossReference Wolf-Gladrow, D.: The expedition of the research vessel Polarstern” to the Antarctic in 2012 (ANT-XXVIII/3), Alfred-Wegener-Institut Helmholtz-Zentrum für Polar und Meeresforschung, Bremerhaven, Germany, 2013, http://epic.awi.de/32788/. 2013 publication http://epic.awi.de/32788/ HTTP http://epic.awi.de/32788/ related publication or dataset information crossReference project Stöven, T., Tanhua, T., Hoppema, M., & Bullister, J. L. (2015). Perspectives of transient tracer applications and limiting cases. Ocean Science, 11(5), 699–718. https://doi.org/10.5194/os-11-699-2015 2015-09-18 publication International DOI Foundation (IDF) https://doi.org/10.5194/os-11-699-2015 https://doi.org/10.5194/os-11-699-2015 HTTPS https://doi.org/10.5194/os-11-699-2015 journal article information Stöven, T. author Tanhua, T. GEOMAR Helmholtz-Zentrum für Ozeanforschung Kiel http://www.geomar.de/ HTTP GEOMAR Helmholtz Centre for Ocean Research Kiel (GEOMAR) website Institution web page information author Hoppema, M. Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research https://www.awi.de/ HTTPS Alfred-Wegener Institute, Helmholtz Centre for Polar and Marine Research (AWI) website Institution web page information author Bullister, J. L. author Copernicus GmbH publisher documentDigital Ocean Sci. 11(5) ISSN 1812-0792, pp. 699-718 crossReference project Jones, E. M., Hoppema, M., Strass, V., Hauck, J., Salt, L., Ossebaar, S., Klaas, C., van Heuven, S. M. A. C., Wolf-Gladrow, D., Stöven, T., & de Baar, H. J. W. (2017). Mesoscale features create hotspots of carbon uptake in the Antarctic Circumpolar Current. Deep Sea Research Part II: Topical Studies in Oceanography, 138, 39–51. https://doi.org/10.1016/j.dsr2.2015.10.006 2017-04 publication International DOI Foundation (IDF) https://doi.org/10.1016/j.dsr2.2015.10.006 https://doi.org/10.1016/j.dsr2.2015.10.006 HTTPS https://doi.org/10.1016/j.dsr2.2015.10.006 journal article information Jones, Elizabeth M. author Hoppema, Mario author Strass, Volker author Hauck, Judith author Salt, Lesley author Ossebaar, Sharyn author Klaas, Christine author van Heuven, Steven M.A.C. author Wolf-Gladrow, Dieter author Stöven, Tim author de Baar, Hein J.W. author Elsevier BV publisher documentDigital Deep Sea Research Part II: Topical Studies in Oceanography 138 ISSN 0967-0645, pp. 39-51 crossReference project Hoppe, C. J. M., Klaas, C., Ossebaar, S., Soppa, M. A., Cheah, W., Laglera, L. M., Santos-Echeandia, J., Rost, B., Wolf-Gladrow, D. A., Bracher, A., Hoppema, M., Strass, V., & Trimborn, S. (2017). Controls of primary production in two phytoplankton blooms in the Antarctic Circumpolar Current. Deep Sea Research Part II: Topical Studies in Oceanography, 138, 63–73. https://doi.org/10.1016/j.dsr2.2015.10.005 2017-04 publication International DOI Foundation (IDF) https://doi.org/10.1016/j.dsr2.2015.10.005 https://doi.org/10.1016/j.dsr2.2015.10.005 HTTPS https://doi.org/10.1016/j.dsr2.2015.10.005 journal article information Hoppe, C.J.M. author Klaas, C. author Ossebaar, S. author Soppa, M.A. author Cheah, W. author Laglera, L.M. author Santos-Echeandia, J. author Rost, B. author Wolf-Gladrow, D.A. author Bracher, A. author Hoppema, M. author Strass, V. author Trimborn, S. author Elsevier BV publisher documentDigital Deep Sea Research Part II: Topical Studies in Oceanography 138 ISSN 0967-0645, pp. 63-73 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 -39.41 12.76 -53.5 -40.79 2012-01-07 2012-03-11 These data were acquired by NCEI from the Carbon Dioxide Information Analysis Center (CDIAC) in accordance with an archival submission agreement between CDIAC and NCEI. NOAA National Centers for Environmental Information +1-301-713-3277 ncei.info@noaa.gov pointOfContact In most cases, electronic downloads of the data are free. However, fees may apply for custom orders, data certifications, copies of analog materials, and data distribution on physical media. Contact NCEI for other distribution options and instructions. CSV 15.064 https://www.ncei.noaa.gov/data/oceans/ncei/ocads/metadata/0144341.html HTTPS Web browser Project Metadata Navigate directly to the URL for a descriptive web page with download links. information https://doi.org/10.3334/cdiac/otg.clivar_a12_06aq20120107 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/144341 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/144341 HTTPS Web browser HTTPS Navigate directly to the URL for data access and direct download. download ftp://ftp-oceans.ncei.noaa.gov/nodc/archive/arc0086/0144341/ 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 0144341 v1.1 was published. 2016-02-26T19:17:23Z NCEI Accession 0144341 v1.1 publication https://www.ncei.noaa.gov/archive/accession/0144341/1.1 HTTPS NCEI Accession 0144341 v1.1 published 2016-02-26T19:17:23Z download dataset Parameter or Variable: Dissolved Inorganic Carbon; Abbreviation: DIC; Observation type: discrete; In-situ / Manipulation / Response variable: in-situ observation; Measured or calculated: Calculated; Replicate information: The precision of the DIC measurements is 1.04 μmol/kg, based on the average difference between all CRM in-bottle duplicate analyses.; Standardization description: Corrected to CRMs; CRM batch number: 113 Parameter or Variable: Total alkalinity; Abbreviation: TA; Observation type: discrete; In-situ / Manipulation / Response variable: in-situ observation; Measured or calculated: Measured; Type of titration: Potentiometric titration; Curve fitting method: The alkalinity measurements were made by potentiometric titration with a strong acid (HCl) as a titrant. The acid consumption up to the second endpoint is equivalent to the titration alkalinity. The system uses a highly precise Metrohm Titrino for adding acid, a pH electrode and a reference electrode Parameter or Variable: CTD_TMP; Abbreviation: CTD_TMP; Unit: DEG_C; Controlled vocabulary name: WATER TEMPERATURE; In-situ / Manipulation / Response variable: in-situ observation Parameter or Variable: CTDSAL; Abbreviation: CTDSAL; Controlled vocabulary name: SALINITY; In-situ / Manipulation / Response variable: in-situ observation Parameter or Variable: OXYGEN; Abbreviation: OXYGEN; Unit: UMOL/KG; Controlled vocabulary name: DISSOLVED OXYGEN; In-situ / Manipulation / Response variable: in-situ observation Parameter or Variable: SILCAT; Abbreviation: SILCAT; Unit: UMOL/KG; Controlled vocabulary name: silicate; In-situ / Manipulation / Response variable: in-situ observation Parameter or Variable: NITRAT; Abbreviation: NITRAT; Unit: UMOL/KG; Controlled vocabulary name: NITRATE; In-situ / Manipulation / Response variable: in-situ observation Parameter or Variable: NITRIT; Abbreviation: NITRIT; Unit: UMOL/KG; Controlled vocabulary name: NITRITE; In-situ / Manipulation / Response variable: in-situ observation Parameter or Variable: PHSPHT; Abbreviation: PHSPHT; Unit: UMOL/KG; Controlled vocabulary name: phosphate; In-situ / Manipulation / Response variable: in-situ observation Parameter or Variable: CFC-12; Abbreviation: CFC-12; Unit: PMOL/KG; Controlled vocabulary name: CHLOROFLUOROCARBON-12 (CFC-12); In-situ / Manipulation / Response variable: in-situ observation Parameter or Variable: SF6; Abbreviation: SF6; Unit: FMOL/KG; Controlled vocabulary name: Sulfur Hexaflouride (SF6); In-situ / Manipulation / Response variable: in-situ observation Parameter or Variable: TCARBN; Abbreviation: TCARBN; Unit: UMOL/KG; Controlled vocabulary name: DISSOLVED INORGANIC CARBON (DIC); In-situ / Manipulation / Response variable: in-situ observation Parameter or Variable: ALKALI; Abbreviation: ALKALI; Unit: UMOL/KG; Controlled vocabulary name: total alkalinity; In-situ / Manipulation / Response variable: in-situ observation Parameter or Variable: THETA; Abbreviation: THETA; Unit: DEG_C; Controlled vocabulary name: Potential temperature (theta); In-situ / Manipulation / Response variable: in-situ observation asNeeded Metadata are developed, maintained and distributed by NCEI. Updates are performed as needed to maintain currentness. NOAA National Centers for Environmental Information custodian bottle bottle any type of water bottle sampling device Generic name for water collection device; usually used to determine temperature, salinity and provide water aliquots for measurement of a wide range of parameters; often referred to by a specific type of water sampling bottle, such as a Nansen or Niskin bottle. coulometer for DIC measurement coulometer for DIC measurement measures dissolved inorganic carbon (DIC) A known amount of seawater is dispensed into a stripping chamber where it is acidified and purged with an inert gas. The amount of CO2 in the resulting gas stream is determined by absorbing the CO2 in an absorbent. The pH of the solution is monitored by measuring the transmittance . CTD CTD Conductivity-Temperature-Depth probe 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. titrator titrator titrator RV Polarstern Additional information provided by ICES on 7/9/2009: Polarstern Flag : GERMANY - DE (ISO Country Code) Call Sign : DBLK Title : Research vessel IMO : 8013132 Commissioned Date : 1982-12-01 Current Length : 118 Built : 1982 Notes : Icebreaker rV Information Source : http://www.awi.de/en/infrastructure/ships/polarstern/ () Lloyds URL : http://www.lloydsmiu.com/lmiu/vessels/overview.htm?vesselID=154010