gov.noaa.nodc:0132049 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 2026-03-26T06:14:31Z ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) Dissolved inorganic carbon, total alkalinity, pH, nutrients, and other variables collected from surface only or profile discrete sampling observations using Niskin bottle and other instruments in the Gulf of Alaska region from 2007-05-19 to 2013-07-22 (NCEI Accession 0132049) 2016-04-15 publication 2015-09-30 creation International DOI Foundation (IDF) 10.7289/v5mp51bc NOAA National Centers for Environmental Information gov.noaa.nodc:0132049 NCEI Archive Management System 0132049 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 Mark Carls NOAA Alaska Fisheries Science Center Auke Bay Laboratories (AFSC/ABL) mark.carls@noaa.gov https://www.afsc.noaa.gov/ABL/default.php HTTPS NOAA Alaska Fisheries Science Center Auke Bay Laboratories (AFSC/ABL) website Institution web page information resourceProvider NOAA Alaska Fisheries Science Center Auke Bay Laboratories (AFSC/ABL) https://www.afsc.noaa.gov/ABL/default.php HTTPS NOAA Alaska Fisheries Science Center Auke Bay Laboratories (AFSC/ABL) website Institution web page information resourceProvider Mark Carls NOAA Alaska Fisheries Science Center Auke Bay Laboratories (AFSC/ABL) mark.carls@noaa.gov https://www.afsc.noaa.gov/ABL/default.php HTTPS NOAA Alaska Fisheries Science Center Auke Bay Laboratories (AFSC/ABL) website Institution web page information principalInvestigator Lawrence Schaufler collaborator Lawra Vanderhoof collaborator Carls, Mark NOAA Alaska Fisheries Science Center Auke Bay Laboratories (AFSC/ABL) mark.carls@noaa.gov https://www.afsc.noaa.gov/ABL/default.php HTTPS NOAA Alaska Fisheries Science Center Auke Bay Laboratories (AFSC/ABL) website Institution web page information author Vanderhoof, Lawra author Schaufler, Lawrence author NOAA Alaska Fisheries Science Center Auke Bay Laboratories (AFSC/ABL) https://www.afsc.noaa.gov/ABL/default.php HTTPS NOAA Alaska Fisheries Science Center Auke Bay Laboratories (AFSC/ABL) website Institution web page information contributor tableDigital This dataset includes environmental data from the Gulf of Alaska region. Samples were collected between May 2007 and July 2013. Observe annual annual fluctuations in hydrogen ion concentrations (expressed as pH, where pH = log10[H+]), TA, DIC, and calcium saturation in Gulf of Alaska water. Funding Information: NOAA Ocean Acidification Program (Annual Carbon Cycles in Coastal Gulf of Alaska Water, OAPFY12.01.AFSC.006) 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:0132049 Preview graphic PNG 0132049 NCEI ACCESSION NUMBER 2016-04-08 publication AMMONIUM (NH4) CHLOROPHYLL A DISSOLVED INORGANIC CARBON (DIC) NITRATE NITRITE pH phosphate SALINITY silicate total alkalinity theme NODC DATA TYPES THESAURUS bottle coulometer for DIC measurement spectrophotometer titrator instrument NODC INSTRUMENT TYPES THESAURUS discrete sample profile surface measurements theme NODC OBSERVATION TYPES THESAURUS NOAA Alaska Fisheries Science Center Auke Bay Laboratories dataCentre NODC COLLECTING INSTITUTION NAMES THESAURUS NOAA Alaska Fisheries Science Center Auke Bay Laboratories dataCentre NODC SUBMITTING INSTITUTION NAMES THESAURUS NODC Ocean Acidification Scientific Data Stewardship (OADS) US DOC; NOAA; Office of Oceanic and Atmospheric Research; Ocean Acidification Program (OAP) project NODC PROJECT NAMES THESAURUS Coastal Waters of Southeast Alaska and British Columbia Gulf of Alaska North Pacific Ocean place NODC SEA AREA NAMES THESAURUS oceanography theme WMO_CategoryCode 2012-09-15 publication DOC/NOAA/NMFS/AFSC > Alaska Fisheries Science Center, National Marine Fisheries Service, 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 Ocean Acidification Program (OAP) Ocean Carbon and Acidification Data System (OCADS) Project project Ocean Acidification Search Keywords EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > ALKALINITY EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > AMMONIA EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > CHLOROPHYLL EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > INORGANIC CARBON EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > NITRATE EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > NITRITE EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > PH EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > PHOSPHATE EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > SILICATE 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 Surface measurement theme OCADS Study Type Ammonium ChlA Nitrate Nitrite Phosphate Salinity Silicate TA TC2 pH theme Provider Variable Abbreviations COULOMETERS OPTSPEC > Optical Spectrometer 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 OCEAN > PACIFIC OCEAN > NORTH PACIFIC OCEAN OCEAN > PACIFIC OCEAN > NORTH PACIFIC OCEAN > GULF OF ALASKA 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 Gulf of Alaska Juneau Prince William Sound Sitka Southeast Alaska place Provider Geographic Names accessLevel: public otherRestrictions Cite as: Carls, Mark; Vanderhoof, Lawra; Schaufler, Lawrence (2016). Dissolved inorganic carbon, total alkalinity, pH, nutrients, and other variables collected from surface only or profile discrete sampling observations using Niskin bottle and other instruments in the Gulf of Alaska region from 2007-05-19 to 2013-07-22 (NCEI Accession 0132049). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.7289/v5mp51bc. 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. 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 Global Coastal Program Data: North America West Coast 2022 publication https://www.ncei.noaa.gov/access/ocean-carbon-acidification-data-system/oceans/Coastal/north_america_west.html HTTPS https://www.ncei.noaa.gov/access/ocean-carbon-acidification-data-system/oceans/Coastal/north_america_west.html Related resource information NOAA National Centers for Environmental Information (NCEI) publisher documentDigital crossReference project eng; USA utf8 environment oceans -146.798 -134.578 57.049 60.719 2007-05-19 2013-07-22 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. Originator data format 2.968 https://www.ncei.noaa.gov/data/oceans/ncei/ocads/metadata/0132049.html HTTPS Web browser Project Metadata Navigate directly to the URL for a descriptive web page with download links. information https://doi.org/10.7289/v5mp51bc 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/132049 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/132049 HTTPS Web browser HTTPS Navigate directly to the URL for data access and direct download. download ftp://ftp-oceans.ncei.noaa.gov/nodc/archive/arc0089/0132049/ 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 0132049 v1.1 was published. 2016-04-15T15:17:42Z NCEI Accession 0132049 v1.1 publication https://www.ncei.noaa.gov/archive/accession/0132049/1.1 HTTPS NCEI Accession 0132049 v1.1 published 2016-04-15T15:17:42Z download dataset Parameter or Variable: Dissolved Inorganic Carbon; Abbreviation: TC2; Unit: umol/kg; Observation type: surface only or profile discrete sampling; In-situ / Manipulation / Response variable: in-situ observation; Measured or calculated: Measured; Sampling instrument: Niskin bottle or laboratory collection, depending on project; Analyzing instrument: CM5014 UIC Coulometer; Detailed sampling and analyzing information: High and low concentrations of sodium carbonate were used to calibrate the Coulometer, and a slope calibration factor was applied to each inorganic carbon value (Goyet and Hacker 1992). Calculations were completed in Excel; CRM manufacturer: Andrew Dickson's lab at Scripps Institute of Oceanography; CRM batch number: CRM 102, 104, 111, 114, 117, 120; Preservation method: Mercuric chloride in some but not all samples; Preservative volume: 0.02% by volume; Uncertainty: Typical precision and accuracy were 0.9% and 0.5%, respectively; Method reference: Dickson et al 2007; Researcher name: Dr. Lawra Vanderhoof, Dr. Lawrence Shaufler; Researcher institution: NMFS/AFSC Auke Bay (AFSC/ABL) Parameter or Variable: Total alkalinity; Abbreviation: TA; Unit: umol/kg; Observation type: surface only or profile discrete sampling; In-situ / Manipulation / Response variable: in-situ observation; Measured or calculated: Measured; Calculation method and parameters: Calculations were completed in Excel using methods of Dickson et al. 2007; Sampling instrument: Niskin; Analyzing instrument: Alkalinity titrator; Metrohm Dosimat autopipette (through August 2011) and thereafter with a QC Titration Module on a TitraSip System (Mantech Associates Inc).; Type of titration: Potentiometric; Cell type (open or closed): Open; Curve fitting method: Non-linear least squares; CRM manufacturer: Andrew Dickson's lab at Scripps Institute of Oceanography; CRM batch number: CRM 102, 104, 111, 114, 117, 120; Preservation method: Mercuric chloride in some but not all samples; Preservative volume: 0.02% by volume; Uncertainty: Typical precision was 3.6% with the Dosimat and 0.5% with the Mantech. Typical accuracy was plus/minus 1.3% with the Dosimat and 0.7% with the Mantech.; Method reference: Open cell titration method from 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: Dr. Lawra Vanderhoof, Dr. Lawrence Shaufler; Researcher institution: NMFS/AFSC Auke Bay (AFSC/ABL) Parameter or Variable: pH; Abbreviation: pH; pH scale: Total; Observation type: surface only or profile discrete sampling; In-situ / Manipulation / Response variable: in-situ observation; Measured or calculated: Measured; Sampling instrument: Niskin; Analyzing instrument: Aligent Technologies Model 8453 UV/visible spectrophotometer; Temperature of pH measurement: 25 C; Detailed sampling and analyzing information: Aligent 8453, M-cresol purple Lot #; At what temperature was pH reported: Environmental; Uncertainty: Values were not corrected for the dye; Method reference: Used spectrometric method from 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: Dr. Lawra Vanderhoof, Dr. Lawrence Shaufler; Researcher institution: NMFS/AFSC Auke Bay (AFSC/ABL) Parameter or Variable: Chlorophyll A concentration in seawater (ug/L); Abbreviation: ChlA; Unit: ug/L; Observation type: surface only or profile discrete sampling; In-situ / Manipulation / Response variable: in-situ observation; Measured or calculated: measured; Sampling instrument: Niskin; Analyzing instrument: Turner Designs Model TD 700 fluorometer or Cary Eclipse spectrofluorometer (2012-2013).; Method reference: Parsons Maita et al 1984; Researcher name: Dr. Lawrence Shaufler; Researcher institution: NMFS/AFSC Auke Bay (AFSC/ABL) Parameter or Variable: Phosphate; Abbreviation: Phosphate; Unit: uM; Observation type: surface only or profile discrete sampling; In-situ / Manipulation / Response variable: in-situ observation; Measured or calculated: measured; Sampling instrument: Niskin; Analyzing instrument: Spectrophotometer; Uncertainty: Typical precision was 2.8% and typical accuracy was 10%; Method reference: Bernhardt and Wilhelms 1967; Researcher name: Dr. Katherine A. Krogslund; Researcher institution: Oceanography Technical Services, University of Washington Parameter or Variable: silicate; Abbreviation: Silicate; Unit: uM; Observation type: surface only or profile discrete sampling; In-situ / Manipulation / Response variable: in-situ observation; Measured or calculated: measured; Sampling instrument: Niskin; Analyzing instrument: Spectrophotometer; Uncertainty: Typical precision was 0.5% and typical accuracy was 3%; Method reference: Armstrong et al 1967; Researcher name: Dr. Katherine A. Krogslund; Researcher institution: Oceanography Technical Services, University of Washington Parameter or Variable: nitrate; Abbreviation: Nitrate; Unit: uM; Observation type: surface only or profile discrete sampling; In-situ / Manipulation / Response variable: in-situ observation; Measured or calculated: measured; Sampling instrument: Niskin; Analyzing instrument: Spectrophotometer; Uncertainty: Typical precision was 1.5% and typical accuracy was 7%; Method reference: Armstrong et al 1967; Researcher name: Dr. Katherine A. Krogslund; Researcher institution: Oceanography Technical Services, University of Washington Parameter or Variable: Nitrite; Abbreviation: Nitrite; Unit: uM; Observation type: surface only or profile discrete sampling; In-situ / Manipulation / Response variable: in-situ observation; Measured or calculated: measured; Sampling instrument: Niskin; Analyzing instrument: Spectrophotometer; Uncertainty: Typical precision was 2.8% and typical accuracy was 6%; Method reference: Armstrong et al 1967; Researcher name: Dr. Katherine A. Krogslund; Researcher institution: Oceanography Technical Services, University of Washington Parameter or Variable: Ammonium; Abbreviation: Ammonium; Observation type: surface only or profile discrete sampling; In-situ / Manipulation / Response variable: in-situ observation; Measured or calculated: measured; Analyzing instrument: Spectrophotometer; Uncertainty: Typical precision was 4.1% and typical accuracy was 4%; Method reference: Armstrong et al 1967; Researcher name: Dr. Katherine A. Krogslund; Researcher institution: Oceanography Technical Services, University of Washington Parameter or Variable: Salinity; Abbreviation: Salinity; Unit: psu (practical salinity scale); Observation type: surface only or profile discrete sampling; In-situ / Manipulation / Response variable: in-situ observation; Measured or calculated: measured; Sampling instrument: Niskin; Analyzing instrument: Model 8400B AutoSal analyzer (Guildline Instruments Limited); Uncertainty: Typical precision and accuracy were 0.2% and 0.1%, respectively.; Researcher name: Dr. Lawrence Shaufler; Researcher institution: NMFS/AFSC Auke Bay (AFSC/ABL) 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 . 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