gov.noaa.nodc:0000193 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 2026-07-27T12:48:43Z 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, partial pressure of CO2 (pCO2), pH on total scale, water temperature, salinity and other variables collected from discrete sample and profile observations during NOAA Ship Discoverer cruise EQ92_FALL (EXPOCODE 31DS19920906) in the Equatorial Pacific Ocean from 1992-09-06 to 1992-12-08 (NCEI Accession 0000193) 2001-04-16 publication 2017-02-21 revision 2001-04-16 creation International DOI Foundation (IDF) 10.3334/cdiac/otg.eq92_fall NOAA National Centers for Environmental Information gov.noaa.nodc:0000193 NCEI Archive Management System 0000193 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 Cooperative Institute for Satellite Earth System Studies (CISESS) Alex.Kozyr@noaa.gov https://cisess.umd.edu/ HTTPS Cooperative Institute for Satellite Earth System Studies (CISESS) website Institution web page information resourceProvider Carbon Dioxide Information Analysis Center (CDIAC) resourceProvider 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 Robert Byrne University of South Florida (USF) rhbyrne@usf.edu https://www.usf.edu/ HTTPS University of South Florida (USF) website Institution web page information collaborator Marilyn F. Lamb NOAA Pacific Marine Environmental Laboratory (PMEL) https://www.pmel.noaa.gov/ HTTPS NOAA Pacific Marine Environmental Laboratory (PMEL) website Institution web page information collaborator James Hendee NOAA Atlantic Oceanographic and Meteorological Laboratory (AOML) jim.hendee@noaa.gov https://www.aoml.noaa.gov/ HTTPS NOAA Atlantic Oceanographic and Meteorological Laboratory (AOML) website Institution web page information collaborator George A. Berberian 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 collaborator Frank J. Millero 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 collaborator Edward T. Peltzer Woods Hole Oceanographic Institution (WHOI) http://www.whoi.edu HTTP Woods Hole Oceanographic Institution (WHOI) website Institution web page information collaborator Doug Wilson 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 collaborator Lamb, Marilyn F. NOAA Pacific Marine Environmental Laboratory https://www.pmel.noaa.gov/ HTTPS NOAA Pacific Marine Environmental Laboratory (PMEL) website Institution web page information author Hendee, James C. NOAA Atlantic Oceanographic and Meteorological Laboratory 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 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 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 http://www.rsmas.miami.edu HTTP University of Miami Rosenstiel School of Marine and Atmospheric Science (RSMAS) website Institution web page information author Byrne, Robert H. University of South Florida https://www.usf.edu/ HTTPS University of South Florida (USF) website Institution web page information author Peltzer, Edward T. Woods Hole Oceanographic Institution http://www.whoi.edu HTTP Woods Hole Oceanographic Institution (WHOI) website Institution web page information author Wilson, Doug NOAA Atlantic Oceanographic and Meteorological Laboratory https://www.aoml.noaa.gov/ HTTPS NOAA Atlantic Oceanographic and Meteorological Laboratory (AOML) website Institution web page information author Berberian, George A. NOAA Atlantic Oceanographic and Meteorological Laboratory 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 dissolved inorganic carbon (DIC), total alkalinity, partial pressure of CO2 (pCO2), pH on total scale, water temperature, salinity, dissolved oxygen concentration, nutrients, carbon-13 and other variables collected from discrete sample and profile observations during NOAA Ship Discoverer cruise EQ92_FALL (EXPOCODE 31DS19920906) in the Equatorial Pacific Ocean from 1992-09-06 to 1992-12-08. The instruments used to collect these data include alkalinity titrator, carbon dioxide (CO2) gas analyzer, coulometer for DIC measurement, CTD, Niskin bottles, and others. These data were collected by Rik Wanninkhof of NOAA Atlantic Oceanographic and Meteorological Laboratory (AOML) and Richard A. Feely of NOAA Pacific Marine Environmental Laboratory (PMEL) as part of the EQ92_FALL dataset. CDIAC associated the following cruise ID(s) with this dataset: EQ92_FALL This dataset is available to the public for a wide variety of uses including scientific research and analysis. 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 0000193 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:0000193 Preview graphic PNG 0000193 NCEI ACCESSION NUMBER 2017-02-21 publication DELTA CARBON-13 DISSOLVED INORGANIC CARBON (DIC) DISSOLVED OXYGEN HYDROSTATIC PRESSURE NITRATE NITRITE phosphate Potential temperature (theta) SALINITY silicate total alkalinity WATER TEMPERATURE theme NODC DATA TYPES THESAURUS bottle carbon dioxide (CO2) gas analyzer coulometer for DIC measurement CTD flask with closed headspace for discrete CO2 measurement spectrophotometer titrator instrument NODC INSTRUMENT TYPES THESAURUS chemical discrete sample physical profile theme NODC OBSERVATION TYPES THESAURUS NOAA Ship Discoverer platform NODC PLATFORM NAMES THESAURUS NOAA Atlantic Oceanographic and Meteorological Laboratory NOAA Pacific Marine Environmental Laboratory dataCentre NODC COLLECTING INSTITUTION NAMES THESAURUS Carbon Dioxide Information Analysis Center dataCentre NODC SUBMITTING INSTITUTION NAMES THESAURUS JOINT GLOBAL OCEAN FLUX STUDY/EQUATORIAL PACIFIC BASIN STUDY (JGOFS/EQPAC) project NODC PROJECT NAMES THESAURUS North Pacific Ocean South Pacific Ocean place NODC SEA AREA NAMES THESAURUS oceanography theme WMO_CategoryCode 2012-09-15 publication DOC/NOAA/NESDIS/NODC > National Oceanographic Data Center, NESDIS, NOAA, U.S. Department of Commerce 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 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 24 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 EQ92_FALL project Cruise ID 31DS19920906 project EXPOCODE JGOFS > Joint Global Ocean Flux Study, IGBP project Global Change Master Directory (GCMD) Project Keywords 2026 revision 24 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 Ocean Carbon and Acidification Data System (OCADS) Project project Ocean Acidification Search Keywords 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 24 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 CTDTMP DELC13 DIC NITRAT NITRIT OXYGEN PHSPHT SALNTY SILCAT TA THETA fCO2 pH theme Provider Variable Abbreviations CO2 ANALYZERS > CO2 ANALYZERS COULOMETERS CTD > Conductivity, Temperature, Depth FLASKS > FLASKS OPTSPEC > Optical Spectrometer instrument Global Change Master Directory (GCMD) Instrument Keywords 2026 revision 24 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 24 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 DISCOVERER (ICES code: 31DS) platform ICES/SeaDataNet Ship Codes OCEAN > PACIFIC OCEAN > NORTH PACIFIC OCEAN OCEAN > PACIFIC OCEAN > SOUTH PACIFIC OCEAN place Global Change Master Directory (GCMD) Location Keywords 2026 revision 24 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 Pacific Ocean place Provider Geographic Names accessLevel: public otherRestrictions Cite as: Lamb, Marilyn F.; Hendee, James C.; Wanninkhof, Rik; Feely, Richard A.; Millero, Frank J.; Byrne, Robert H.; Peltzer, Edward T.; Wilson, Doug; Berberian, George A. (2001). Dissolved inorganic carbon (DIC), total alkalinity, partial pressure of CO2 (pCO2), pH on total scale, water temperature, salinity and other variables collected from discrete sample and profile observations during NOAA Ship Discoverer cruise EQ92_FALL (EXPOCODE 31DS19920906) in the Equatorial Pacific Ocean from 1992-09-06 to 1992-12-08 (NCEI Accession 0000193). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.3334/cdiac/otg.eq92_fall. 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. Lamb, M. F., J.C. Hendee, R. Wanninkhof, R.A. Feely, F.J. Millero, R. Byrne, E.T. Peltzer, D. Wilson, and G. Berberian (1995). Chemical and hydrographic measurements from the Equatorial Pacific during boreal fall 1992. Carbon Dioxide Information Analysis Center, Oak Ridge National Laboratory, Oak Ridge, Tennessee, EQ92_FALL. 1995 publication EQ92_FALL Lamb, M. F., J.C. Hendee, R. Wanninkhof, R.A. Feely, F.J. Millero, R. Byrne, E.T. Peltzer, D. Wilson, and G. Berberian author Carbon Dioxide Information Analysis Center (CDIAC) publisher Ocean CO2 [retrieved from http://cdiac.esd.ornl.gov/ftp/oceans/eqpac92noaa/EQ92_Fall/] crossReference Lamb, M. F., Lantry, T., Hendee, J., McTaggart, K. E., Murphy, P. P., Feely, R. A., Wanninkhof, R., Millero, F. J., Byrne, R. H., Peltzer, E. T., and Frazel, D., 1995, Chemical and Hydrographic measurements from the Equatorial Pacific during fall, 1992: Contribution No. 1341 from NOAA/Pacific Marine Environmental Laboratory, 1341. 1995 publication 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 Data Management Support for the International Global Ocean Carbon and Repeat Hydrography Program 2022 publication https://www.ncei.noaa.gov/access/ocean-carbon-acidification-data-system/oceans/RepeatSections/ HTTPS https://www.ncei.noaa.gov/access/ocean-carbon-acidification-data-system/oceans/RepeatSections/ Related resource information NOAA National Centers for Environmental Information (NCEI) publisher documentDigital crossReference project eng; USA utf8 environment oceans -140.303 -77.331 -14.0008 10.018 1992-09-06 1992-12-08 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. 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. 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 1.332 https://www.ncei.noaa.gov/data/oceans/ncei/ocads/metadata/0000193.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.eq92_fall 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/193 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/193 HTTPS Web browser HTTPS Navigate directly to the URL for data access and direct download. download ftp://ftp-oceans.ncei.noaa.gov/nodc/archive/arc0001/0000193/ 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 0000193 v1.1 was published. 2001-04-16T04:00:00Z NCEI Accession 0000193 v1.1 publication https://www.ncei.noaa.gov/archive/accession/0000193/1.1 HTTPS NCEI Accession 0000193 v1.1 published 2001-04-16T04:00:00Z download NCEI Accession 0000193 was revised and v1.2 was published. Additional metadata files were received or created for this dataset. These updates were copied into the about/ 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. 2013-03-14T15:47:59Z NCEI Accession 0000193 v1.2 publication https://www.ncei.noaa.gov/archive/accession/0000193/1.2 HTTPS NCEI Accession 0000193 v1.2 published 2013-03-14T15:47:59Z download NCEI Accession 0000193 was revised and v2.3 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. 2013-07-09T14:26:11Z NCEI Accession 0000193 v2.3 publication https://www.ncei.noaa.gov/archive/accession/0000193/2.3 HTTPS NCEI Accession 0000193 v2.3 published 2013-07-09T14:26:11Z download NCEI Accession 0000193 was revised and v3.4 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. 2017-02-21T15:23:13Z NCEI Accession 0000193 v3.4 publication https://www.ncei.noaa.gov/archive/accession/0000193/3.4 HTTPS NCEI Accession 0000193 v3.4 published 2017-02-21T15:23:13Z 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: Duplicate pairs tripped at the maximal depth throughout the cruise show a mean difference of 0.1 +/- 2.1 μmol/kg (n = 93).; Standardization description: The coulometers were each calibrated by injecting aliquots of pure CO2 (99.995%) by means of an 8-port valve outfitted with two sample loops. The loop volumes were calibrated at BNL (Wilke, 1993) prior to, and following, the cruise, and no significant difference was found between the pre- and post-cruise calibrations.; CRM batch number: 12 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: Single point titration; Cell type (open or closed): Closed; Curve fitting method: The TAlk titration system was similar to the one used in previous studies (Thurmond and Millero, 1982; Bradshaw and Brewer, 1988) and consisted of a Metrohm 665 DosimatJ titrator and an Orion 720A pH meter operated by a personal computer. The titration was made by adding HCl to seawater past the carbonic acid end point. A typical titration records the emf reading after it becomes stable (0.09 mV) and adds enough acid to change the voltage by a pre-assigned increment (13 mV). The electrodes used to measure emf consisted of a ROSSJ glass pH electrode and an OrionJ double junction Ag/AgCl reference electrode.; Method reference: Thurmond, V.L., and F.J. Millero (1982): The ionization of carbonic acid in sodium chloride solutions at 25C. J. Solution Chem., 11, 447B11,456. Bradshaw, A.L., and P.G. Brewer (1988): High precision measurements of alkalinity and total carbon dioxide in seawater by potentiometric titration. Presence of unknown protolyte(s)? Mar. Chem., 23, 69B86. Parameter or Variable: pH; Abbreviation: pH; pH scale: total pH scale; Observation type: discrete; In-situ / Manipulation / Response variable: in-situ observation; Measured or calculated: Measured; Temperature of pH measurement: 25C; Detailed sampling and analyzing information: All spectrophotometric pH measurements were made using the indicator m-Cresol Purple. Sample cells (10-cm pathlength spectrophotometric cells, 30-cm3 volume) were filled directly from the NiskinJbottle.; Uncertainty: Na Parameter or Variable: pCO2 (fCO2) discrete; Abbreviation: fCO2; Observation type: discrete; In-situ / Manipulation / Response variable: in-situ observation; Measured or calculated: Measured; Seawater volume: 500 mL; Headspace volume: 60 mL; Temperature of measurement: 20.00 +/- 0.02C; Detailed sampling and analyzing information: The AOML discrete fCO2 system is patterned after the design described in Chipman et al. (1993) and is discussed in detail in Wanninkhof and Thoning (1993). The major difference between the two systems is that the AOML system uses a LicorJ (model 6262) non-dispersive infrared analyzer, while the Chipman et al. system utilizes a gas chromatograph with a flame ionization detector and a methanizer, which quantitatively converts CO2 into CH4 for analysis. The headspaces of the two flasks are equilibrated simultaneously in channels A and B. While headspace from the flask in channel A goes through the IR analyzer, the headspace of the flask in channel B is recirculated in a closed loop. The sample in the A channel is equilibrated for 17 minutes while the air from the headspace of the flask flows through the IR analyzer.; Uncertainty: Precision of the fCO2 analyses shown in Table 3 of the cruise report at: http://cdiac.esd.ornl.gov/ftp/oceans/eqpac92noaa/.; Method reference: Chipman, D.W., J. Marra, and T. Takahashi (1993): Primary production at 47N and 20W in the North Atlantic Ocean: A comparison between the 14C incubation method and mixed layer carbon budget observations. Deep-Sea Res. II, 40, 151B169. Wanninkhof, R., and K. Thoning (1993): Surface water fCO2 measurements using continuous and discrete sampling methods. Mar. Chem. 44, 189B204. Parameter or Variable: CTDTMP; Abbreviation: CTDTMP; Unit: DEG_C; Controlled vocabulary name: WATER TEMPERATURE; In-situ / Manipulation / Response variable: in-situ observation Parameter or Variable: SALNTY; Abbreviation: SALNTY; 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: 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: SILCAT; Abbreviation: SILCAT; Unit: UMOL/KG; Controlled vocabulary name: silicate; 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: DELC13; Abbreviation: DELC13; Unit: /MILLE; Controlled vocabulary name: DELTA CARBON-13; 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 repository NOAA National Centers for Environmental Information NOAA created the National Centers for Environmental Information (NCEI) by merging NOAA's National Climatic Data Center (NCDC), National Geophysical Data Center (NGDC), and National Oceanographic Data Center (NODC), including the National Coastal Data Development Center (NCDDC), per the Consolidated and Further Continuing Appropriations Act, 2015, Public Law 113-235. NCEI launched publicly on April 22, 2015. 2015-04-22T00:00:00 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. 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. 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 flask with closed headspace for discrete CO2 measurement flask with closed headspace for discrete CO2 measurement discrete carbon dioxide (CO2) measurement spectrophotometer spectrophotometer 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." titrator titrator titrator NOAA Ship Discoverer Flag: United States of America Vessel Type: Research Vessel (Oceanographic) DOB: 1966 IMO: 6600814 Hull Classification: R 102 History: Decommissioned as NOAA Ship DISCOVERER in 1997