gov.noaa.nodc:0292960 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 2026-04-23T08:02:32Z ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) PAR-GWR-CARB: A monthly gridded surface carbonate system data product for the Pacific-Arctic Region from 1982-2021 (NCEI Accession 0292960) 2024-05-31 publication 2025-04-15 revision 2024-05-21 creation International DOI Foundation (IDF) 10.25921/p35d-d778 NOAA National Centers for Environmental Information gov.noaa.nodc:0292960 NCEI Archive Management System 0292960 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 Thomas V. Caero University of Rhode Island, Graduate School of Oceanography (GSO) thomas@caero.info resourceProvider University of Rhode Island, Graduate School of Oceanography (GSO) resourceProvider Thomas Caero University of Rhode Island Graduate School of Oceanography, Narragansett, RI, USA thomas@caero.info principalInvestigator Hongjie Wang University of Rhode Island Graduate School of Oceanography, Narragansett, RI, USA hwangde@udel.edu principalInvestigator Annika Jersild Cooperative Institute for Satellite Earth System Studies (CISESS) ajersild@umd.edu https://cisess.umd.edu/ HTTPS Cooperative Institute for Satellite Earth System Studies (CISESS) website Institution web page information principalInvestigator Caero, Thomas V. University of Rhode Island Graduate School of Oceanography, Narragansett, RI, USA author Wang, Hongjie University of Rhode Island Graduate School of Oceanography, Narragansett, RI, USA author Jersild, Annika Cooperative Institute for Satellite Earth System Studies (CISESS) https://cisess.umd.edu/ HTTPS Cooperative Institute for Satellite Earth System Studies (CISESS) website Institution web page information author University of Rhode Island, Graduate School of Oceanography (GSO) contributor tableDigital The Pacific-Arctic Region (PAR) is highly sensitive to ocean acidification, yet data gaps in the carbonate system record persist due to the region's remote nature and environmental factors such as sea ice. To address these gaps, we utilized a geographically-weighted regression (GWR) to predict surface total alkalinity using salinity and temperature data at a monthly 1°x1° resolution. The GWR methodology, which allows regression coefficients to vary spatially, accounts for local factors such as riverine discharge, sea ice melt, primary productivity, and other influences on alkalinity. This approach achieved a high degree of accuracy, with an R² of 0.93, a mean absolute error (MAE) of 23 μmol/kg, and near-zero bias (mean bias error [MBE] of -0.01 μmol/kg), as validated by 10-fold cross-validation (N = 7,146). The derived regression coefficients were then applied to the Hadley EN4 salinity and OI SST temperature datasets to estimate total alkalinity. Subsequently, this total alkalinity dataset was integrated with the MPI-SOM-FFN surface pCO2 dataset to reconstruct the entire carbonate system (DIC, pH, [H⁺], Ω) from 1982 to 2021 at a monthly 1°x1° resolution. 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 0292960 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:0292960 Preview graphic PNG 0292960 NCEI ACCESSION NUMBER 2025-04-13 publication ARAGONITE SATURATION STATE DISSOLVED INORGANIC CARBON (DIC) partial pressure of carbon dioxide - water pH phosphate SALINITY SEA SURFACE TEMPERATURE silicate total alkalinity theme NODC DATA TYPES THESAURUS carbon dioxide (CO2) gas analyzer nutrient autoanalyzer pH sensor temperature sensor titrator instrument NODC INSTRUMENT TYPES THESAURUS chemical model output physical theme NODC OBSERVATION TYPES THESAURUS VARIOUS CHARTERED VESSELS platform NODC PLATFORM NAMES THESAURUS University of Rhode Island, Graduate School of Oceanography dataCentre NODC COLLECTING INSTITUTION NAMES THESAURUS University of Rhode Island, Graduate School of Oceanography dataCentre NODC SUBMITTING INSTITUTION NAMES THESAURUS Ocean Carbon and Acidification Data System (OCADS) project NODC PROJECT NAMES THESAURUS Arctic Ocean Beaufort Sea Bering Sea Chukchi Sea East Siberian Sea Gulf of Alaska North Pacific Ocean place NODC SEA AREA NAMES THESAURUS oceanography theme WMO_CategoryCode 2012-09-15 publication URI/GSO > Graduate School of Oceanography, University of Rhode Island 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 Carbon and Acidification Data System (OCADS) Project project Ocean Acidification Search Keywords EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > ALKALINITY EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > CARBON DIOXIDE EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > CARBONATE EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > INORGANIC CARBON EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > PH EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > PHOSPHATE EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > SILICATE EARTH SCIENCE > OCEANS > OCEAN TEMPERATURE > SEA SURFACE 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 Model output theme OCADS Study Type dic h latitude longitude omega_ar pco2 ph phos sil sss sst subregions ta ta_gwr_a ta_gwr_b ta_gwr_c time u_dic u_h u_omega_ar u_pco2 u_ph u_sss u_ta theme Provider Variable Abbreviations AUTOANALYZER > AUTOANALYZER CO2 ANALYZERS > CO2 ANALYZERS PH METERS > PH METERS TEMPERATURE SENSORS > TEMPERATURE SENSORS 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 > ARCTIC OCEAN OCEAN > ARCTIC OCEAN > BEAUFORT SEA OCEAN > ARCTIC OCEAN > CHUKCHI SEA OCEAN > PACIFIC OCEAN > NORTH PACIFIC OCEAN OCEAN > PACIFIC OCEAN > NORTH PACIFIC OCEAN > BERING SEA 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 Arctic Ocean Beaufort Sea Bering Sea Canadian Archipelago Chukchi Sea East Siberian Sea Gulf of Alaska Subarctic Pacific place Provider Geographic Names accessLevel: public otherRestrictions Cite as: Caero, Thomas V.; Wang, Hongjie; Jersild, Annika (2024). PAR-GWR-CARB: A monthly gridded surface carbonate system data product for the Pacific-Arctic Region from 1982-2021 (NCEI Accession 0292960). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.25921/p35d-d778. 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. license This dataset is licensed under a Creative Commons Attribution 4.0 International (CC BY 4.0) License. SPDX License: Creative Commons Attribution 4.0 International (CC-BY-4.0) 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 Ocean Carbon Data 2022 publication https://www.ncei.noaa.gov/access/ocean-carbon-acidification-data-system/oceans/ HTTPS https://www.ncei.noaa.gov/access/ocean-carbon-acidification-data-system/oceans/ Related resource information NOAA National Centers for Environmental Information (NCEI) publisher documentDigital crossReference project eng; USA utf8 environment oceans 156 -103 45 90 1982-01-01 2021-12-31 This data package (Submission ID: BHJ6VVVC1) was acquired by NCEI from the Scientific Data Integration System (SDIS) at the NOAA Pacific Marine Environmental Laboratory (PMEL) in accordance with the archival submission agreement between NCEI and PMEL. 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. Originator data format 1309.536 https://www.ncei.noaa.gov/data/oceans/ncei/ocads/metadata/0292960.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/p35d-d778 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/292960 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/292960 HTTPS Web browser HTTPS Navigate directly to the URL for data access and direct download. download ftp://ftp-oceans.ncei.noaa.gov/nodc/archive/arc0227/0292960/ 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 0292960 v1.1 was published. 2024-05-31T20:07:30Z NCEI Accession 0292960 v1.1 publication https://www.ncei.noaa.gov/archive/accession/0292960/1.1 HTTPS NCEI Accession 0292960 v1.1 published 2024-05-31T20:07:30Z download NCEI Accession 0292960 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. 2025-04-15T21:24:32Z NCEI Accession 0292960 v2.2 publication https://www.ncei.noaa.gov/archive/accession/0292960/2.2 HTTPS NCEI Accession 0292960 v2.2 published 2025-04-15T21:24:32Z download dataset Parameter or Variable: Dissolved Inorganic Carbon; Abbreviation: dic; Unit: μmol/kg; Observation type: Model output; In-situ / Manipulation / Response variable: response variable; Measured or calculated: CALCULATED; Calculation method and parameters: CO2SYS v2.1 for MATLAB. Calculated using TA and pCO2. K1 and K2 dissociation constants from Millero et al. (2006), KSO4 constants from Dickson et al. (1990), and boron/chlorinity ration from Uppstrom (1974).; Uncertainty: Calculated using 'errors.m' subroutine in CO2SYS. Uncertainty of individual monthly 1°x1° grid cells range from 3.8 to 187 umol/kg. The overall uncertainty for the entire region, measured by comparing discrete bottle samples, is 38 umol/kg. Uncertainty quantification and propagation is explained in detail in pending publication.; Researcher name: Thomas Caero; Researcher institution: University of Rhode Island Graduate School of Oceanography Parameter or Variable: Total alkalinity; Abbreviation: ta; Unit: μmol/kg; Observation type: Model output; In-situ / Manipulation / Response variable: response variable; Measured or calculated: CALCULATED; Calculation method and parameters: Geographically weighted regression using the equation: TA = a + b*SSS + c*SST. The variables 'a', 'b', and 'c' are 1°x1° fields.; Uncertainty: Uncertainty was calculated using 10-fold cross validation by finding the mean absolute error of prediction residuals at every 1°x1° grid cell. Uncertainty of individual monthly 1°x1° grid cells range from 0.4 to 79 umol/kg. Overall uncertainty for the entire region is 23 umol/kg.; Researcher name: Thomas Caero; Researcher institution: University of Rhode Island Graduate School of Oceanography Parameter or Variable: pH; Abbreviation: ph; pH scale: TOTALSCALE(T); Observation type: Model output; In-situ / Manipulation / Response variable: response variable; Measured or calculated: CALCULATED; Calculation method and parameters: CO2SYS v2.1 for MATLAB. Calculated using TA and pCO2. K1 and K2 dissociation constants from Millero et al. (2006), KSO4 constants from Dickson et al. (1990), and boron/chlorinity ration from Uppstrom (1974).; Uncertainty: Calculated using 'errors.m' subroutine in CO2SYS. Uncertainty of individual monthly 1°x1° grid cells range from 0.008 to 0.3 pH units. Uncertainty quantification and propagation is explained in detail in pending publication.; Researcher name: Thomas Caero; Researcher institution: University of Rhode Island Graduate School of Oceanography Parameter or Variable: pCO2 (fCO2) discrete; Abbreviation: pco2; Unit: μatm; Observation type: Model output; In-situ / Manipulation / Response variable: response variable; Measured or calculated: CALCULATED; Headspace volume: 5 mL; Detailed sampling and analyzing information: This is the pCO2 data from MPI-SOM-FFN. It can be located at https://doi.org/10.7289/v5z899n6; Method reference: Jersild et al. (2017); Researcher name: Annika Jersild; Researcher institution: ESSIC Parameter or Variable: Dissolved Inorganic Carbon Uncertainty; Abbreviation: u_dic; Unit: μmol/kg; Observation type: Model output; In-situ / Manipulation / Response variable: response variable; Measured or calculated: CALCULATED; Calculation method and parameters: Calculated using 'errors.m' CO2SYS subroutine; Uncertainty: Calculated using 'errors.m' subroutine in CO2SYS. Uncertainty of individual monthly 1°x1° grid cells range from 3.8 to 187 umol/kg. The overall uncertainty for the entire region, measured by comparing discrete bottle samples, is 38 umol/kg. Uncertainty quantification and propagation is explained in detail in pending publication.; Researcher name: Thomas Caero; Researcher institution: University of Rhode Island Graduate School of Oceanography Parameter or Variable: Total hydrogen ion content; Abbreviation: h; Unit: nmol/kg; Observation type: Model output; In-situ / Manipulation / Response variable: response variable; Measured or calculated: CALCULATED; Calculation method and parameters: CO2SYS v2.1 for MATLAB. Calculated using TA and pCO2. K1 and K2 dissociation constants from Millero et al. (2006), KSO4 constants from Dickson et al. (1990), and boron/chlorinity ration from Uppstrom (1974).; Uncertainty: Calculated using 'errors.m' subroutine in CO2SYS. Uncertainty of individual monthly 1°x1° grid cells range from 0.1 to 6 nmol/kg. The overall uncertainty for the entire region, measured by comparing discrete bottle samples, is 0.99 nmol/kg. Uncertainty quantification and propagation is explained in detail in pending publication.; Researcher name: Thomas Caero; Researcher institution: University of Rhode Island Graduate School of Oceanography Parameter or Variable: Total hydrogen ion content uncertainty; Abbreviation: u_h; Unit: nmol/kg; Observation type: Model output; In-situ / Manipulation / Response variable: response variable; Measured or calculated: CALCULATED; Calculation method and parameters: Calculated using 'errors.m' CO2SYS subroutine; Researcher name: Thomas Caero; Researcher institution: University of Rhode Island Graduate School of Oceanography Parameter or Variable: Aragonite saturation state; Abbreviation: omega_ar; Unit: unitless; Observation type: Model output; In-situ / Manipulation / Response variable: response variable; Measured or calculated: CALCULATED; Calculation method and parameters: CO2SYS v2.1 for MATLAB. Calculated using TA and pCO2. K1 and K2 dissociation constants from Millero et al. (2006), KSO4 constants from Dickson et al. (1990), and boron/chlorinity ration from Uppstrom (1974).; Uncertainty: Calculated using 'errors.m' subroutine in CO2SYS. Uncertainty of individual monthly 1°x1° grid cells range from 0.02 to 1.8 units. The overall uncertainty for the entire region, measured by comparing discrete bottle samples, is 0.202. Uncertainty quantification and propagation is explained in detail in pending publication.; Researcher name: Thomas Caero; Researcher institution: University of Rhode Island Graduate School of Oceanography Parameter or Variable: Aragonite saturation state uncertainty; Abbreviation: u_omega_ar; Unit: unitless; Observation type: Model output; In-situ / Manipulation / Response variable: response variable; Measured or calculated: CALCULATED; Calculation method and parameters: Calculated using 'errors.m' CO2SYS subroutine; Researcher name: Thomas Caero; Researcher institution: University of Rhode Island Graduate School of Oceanography Parameter or Variable: pCO2 Uncertainty; Abbreviation: u_pco2; Unit: μatm; Observation type: Model output; In-situ / Manipulation / Response variable: response variable; Measured or calculated: CALCULATED; Detailed sampling and analyzing information: The MPI-SOM-FFN dataset did not provide pCO2 uncertainty. To create this, we compared the pCO2 data to 2.2 million discrete pCO2 measurements to generate a spatial pCO2 uncertainty field. Uncertainty of individual monthly 1°x1° grid cells range from 0.13 to 271 μatm. The overall pCO2 uncertainty for the entire region is 36 μatm with significant spatial variability. The process is provided in detail in the pending publication.; Researcher name: Thomas Caero; Researcher institution: University of Rhode Island Graduate School of Oceanography Parameter or Variable: pH Uncertainty; Abbreviation: u_ph; Unit: unitless; Observation type: Model output; In-situ / Manipulation / Response variable: response variable; Measured or calculated: CALCULATED; Calculation method and parameters: Calculated using 'errors.m' CO2SYS subroutine; Researcher name: Thomas Caero; Researcher institution: University of Rhode Island Graduate School of Oceanography Parameter or Variable: Total Alkalinity Uncertainty; Abbreviation: u_ta; Unit: μmol/kg; Observation type: Model output; In-situ / Manipulation / Response variable: response variable; Measured or calculated: CALCULATED; Calculation method and parameters: Observational residuals; Researcher name: Thomas Caero; Researcher institution: University of Rhode Island Graduate School of Oceanography Parameter or Variable: Phosphate concentration in sea water; Abbreviation: phos; Unit: μmol/kg; Observation type: Climatology; Detailed sampling and analyzing information: World Ocean Atlas 2018 monthly climatology of phosphate concentration for upper 10 meters of 1°x1° grid cell.; Method reference: Garcia et al. (2019) Parameter or Variable: Silicate concentration in sea water; Abbreviation: sil; Unit: μmol/kg; Observation type: Climatology; Detailed sampling and analyzing information: World Ocean Atlas 2018 monthly climatology of silicate concentration for upper 10 meters of 1°x1° grid cell.; Method reference: Garcia et al. (2019) Parameter or Variable: Sea surface salinity; Abbreviation: sss; Unit: psu; Detailed sampling and analyzing information: Monthly average sea surface salinity for upper 10 meters of 1°x1° grid cell Source: Hadley EN4 (EN.4.2.2): Good et al. (2013) DOI: 10.1002/2013JC009067 Parameter or Variable: Sea surface salinity uncertainty; Abbreviation: u_sss; Unit: psu; Detailed sampling and analyzing information: Uncertainty in monthly average sea surface salinity for upper 10 meters of 1°x1° grid cell Source: Hadley EN4 (EN.4.2.2): Good et al. (2013) DOI: 10.1002/2013JC009067 Parameter or Variable: Sea surface temperature; Abbreviation: sst; Unit: degrees celsius; Detailed sampling and analyzing information: Monthly average sea surface temperature for upper 10 meters of 1°x1° grid cell Source: OI SST (v2) : Reynolds et al. (2002) DOI: 10.1175/1520-0442(2002)015<1609:AIISAS>2.0.CO;2 Parameter or Variable: Latitude; Abbreviation: latitude; Unit: Degrees N Parameter or Variable: Longitude; Abbreviation: longitude; Unit: Degrees East Parameter or Variable: Time; Abbreviation: time; Unit: Days since 1980-01-01 Parameter or Variable: Subregions; Abbreviation: subregions; Unit: unitless; Detailed sampling and analyzing information: Marine Ecoregions of the World subregions. Slightly modified to ensure complete coverage of Pacific-Arctic Region. Legend: (1) Arctic, (2) East Siberian Sea, (3) Upper Canadian Archipelago, (4) Chukchi Sea, (5) West Beaufort Sea, (6) East Beaufort Sea, (7) Lower Canadian Archipelago, (8) Bering Sea Shelf, (9) Bering Sea Basin, (10) Aleutian Chain, (11) Gulf of Alaska and Subarctic Pacific DOI: 10.1641/B570707; Method reference: Spalding et al. (2007) Parameter or Variable: Total Alkalinity (TA) Geographically Weighted Regression (GWR) Intercept Coefficient; Abbreviation: ta_gwr_a; Unit: μmol/kg; Observation type: Model output; Detailed sampling and analyzing information: GWR intercept grid to predict TA using SSS and SST. Can calculate TA at any given grid cell using the equation "TA = a + b*SSS + c*SST" This variable is "a".; Researcher name: Thomas Caero; Researcher institution: University of Rhode Island Graduate School of Oceanography Parameter or Variable: Total Alkalinity (TA) Geographically Weighted Regression (GWR) Sea Surface Salinity (SSS) Coefficient; Abbreviation: ta_gwr_b; Unit: μmol/kg psu; Observation type: Model output; Detailed sampling and analyzing information: GWR SSS grid to predict TA using SSS and SST. Can calculate TA at any given grid cell using the equation "TA = a + b*SSS + c*SST" This variable is "b".; Researcher name: Thomas Caero; Researcher institution: University of Rhode Island Graduate School of Oceanography Parameter or Variable: Total Alkalinity (TA) Geographically Weighted Regression (GWR) Sea Surface Temperature (SST) Coefficient; Abbreviation: ta_gwr_c; Unit: μmol/kg degree Celsius; Observation type: Model output; Detailed sampling and analyzing information: GWR SST grid to predict TA using SSS and SST. Can calculate TA at any given grid cell using the equation "TA = a + b*SSS + c*SST" This variable is "c".; Researcher name: Thomas Caero; Researcher institution: University of Rhode Island Graduate School of Oceanography 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. nutrient autoanalyzer nutrient autoanalyzer Laboratory Instrument Nutrient Autoanalyzer is a generic term describing an automated flow-thru system used to conduct analyses of several different nutrients (nitrate, ammonium, orthophosphate, and silicate) simultaneously from a seawater sample. For example: SEAL AutoAnalyzer 3 HR Continuous Segmented Flow Analyzer 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. temperature sensor temperature sensor A sensor used to measure temperature. titrator titrator titrator VARIOUS CHARTERED VESSELS VARIOUS CHARTERED VESSELS