gov.noaa.nodc:0299020 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 2025-11-29T08:10:58Z ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) Surface underway pH, water temperature, salinity, dissolved oxygen, chlorophyll and discrete analyses of dissolved inorganic carbon and total alkalinity from the underway TSG collected during the RRS Discovery fall 2023 oceanographic survey cruise (EXPOCODE 32V320231006) in the North Atlantic Ocean and Labrador Sea from 2023-10-06 to 2023-10-26 (NCEI Accession 0299020) 2024-11-15 publication 2024-11-13 creation International DOI Foundation (IDF) 10.25921/g555-9q86 NOAA National Centers for Environmental Information gov.noaa.nodc:0299020 NCEI Archive Management System 0299020 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 Gary Maillet Department of Fisheries and Oceans Canada (DFO) gary.maillet@dfo-mpo.gc.ca https://www.canada.ca/en/fisheries-oceans.html HTTPS Department of Fisheries and Oceans Canada (DFO) website Institution web page information resourceProvider Fisheries and Oceans Canada, Institute of Ocean Sciences resourceProvider Gary Maillet Department of Fisheries and Oceans Canada (DFO) gary.maillet@dfo-mpo.gc.ca https://www.canada.ca/en/fisheries-oceans.html HTTPS Department of Fisheries and Oceans Canada (DFO) website Institution web page information principalInvestigator David Bélanger Department of Fisheries and Oceans Canada (DFO) david.belanger@dfo-mpo.gc.ca https://www.canada.ca/en/fisheries-oceans.html HTTPS Department of Fisheries and Oceans Canada (DFO) website Institution web page information principalInvestigator Frédéric Cyr Department of Fisheries and Oceans Canada (DFO) frederic.cyr@dfo-mpo.gc.ca https://www.canada.ca/en/fisheries-oceans.html HTTPS Department of Fisheries and Oceans Canada (DFO) website Institution web page information principalInvestigator Stephen Snook Department of Fisheries and Oceans Canada (DFO) stephen.snook@dfo-mpo.gc.ca https://www.canada.ca/en/fisheries-oceans.html HTTPS Department of Fisheries and Oceans Canada (DFO) website Institution web page information principalInvestigator Alexandria Fudge Department of Fisheries and Oceans Canada (DFO) https://www.canada.ca/en/fisheries-oceans.html HTTPS Department of Fisheries and Oceans Canada (DFO) website Institution web page information collaborator Bélanger, David Department of Fisheries and Oceans Canada (DFO) https://www.canada.ca/en/fisheries-oceans.html HTTPS Department of Fisheries and Oceans Canada (DFO) website Institution web page information author Cyr, Frédéric Department of Fisheries and Oceans Canada (DFO) https://www.canada.ca/en/fisheries-oceans.html HTTPS Department of Fisheries and Oceans Canada (DFO) website Institution web page information author Fudge, Alexandria Department of Fisheries and Oceans Canada (DFO) https://www.canada.ca/en/fisheries-oceans.html HTTPS Department of Fisheries and Oceans Canada (DFO) website Institution web page information author Maillet, Gary Department of Fisheries and Oceans Canada (DFO) https://www.canada.ca/en/fisheries-oceans.html HTTPS Department of Fisheries and Oceans Canada (DFO) website Institution web page information author Snook, Stephen Department of Fisheries and Oceans Canada (DFO) https://www.canada.ca/en/fisheries-oceans.html HTTPS Department of Fisheries and Oceans Canada (DFO) website Institution web page information author Fisheries and Oceans Canada, Institute of Ocean Sciences contributor tableDigital This dataset includes underway sensor measurements collected during the RRS Discovery Fisheries and Oceans Canada (DFO) Atlantic Zone Monitoring Program (AZMP) cruise (EXPOCODE 32V320231006) in the North Atlantic Ocean and Labrador Sea from 2023-10-06 to 2023-10-26. These data include water temperature, salinity, dissolved oxygen, and chlorophyll a fluorescence. In addition, daily sampling for measurement of DIC and TA were conducted. Oceanographic sampling of physical, biological, and chemical parameters is performed annually along selected fixed sections as part of the AZMP. The full sampling program consists at a minimum of a vertical profile of the entire water column (temperature; salinity; dissolved oxygen); rosette bottle casts at selected depths (nutrients; DIC and TA; and other biological parameters) as well as plankton net tows. The AZMP was implemented in 1998 with the aim of increasing DFO's capacity to understand, describe, and forecast the state of the marine ecosystem and to quantify the changes in the ocean physical, chemical, and biological properties. Ocean acidification is an emerging priority for DFO under the Aquatic Climate Change Adaption Services Program (ACCASP) and is developing the knowledge-based information necessary to support the development of adaptation tools and strategies and investing in science to better understand the specific consequences of a changing climate. Specifically, the effects of ocean acidification on ecosystems in the Northwest Atlantic and large aquatic basin risk assessments consider ocean acidification at the basin and sub-basin scale are being investigated. Funding Information: Government of Canada - Fisheries and Oceans Canada (Atlantic Zone Monitoring Program (AZMP) & Aquatic Climate Change Adaptation Services Program (ACCASP)) 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:0299020 Preview graphic PNG 0299020 NCEI ACCESSION NUMBER 2024-11-12 publication CHLOROPHYLL DISSOLVED INORGANIC CARBON (DIC) DISSOLVED OXYGEN pH SALINITY total alkalinity WATER TEMPERATURE theme NODC DATA TYPES THESAURUS pH sensor thermosalinograph instrument NODC INSTRUMENT TYPES THESAURUS chemical physical surface underway theme NODC OBSERVATION TYPES THESAURUS DISCOVERY platform NODC PLATFORM NAMES THESAURUS Fisheries and Oceans Canada, Institute of Ocean Sciences dataCentre NODC COLLECTING INSTITUTION NAMES THESAURUS Fisheries and Oceans Canada, Institute of Ocean Sciences dataCentre NODC SUBMITTING INSTITUTION NAMES THESAURUS Ship of Opportunity Programme (SOOP) Surface Ocean CO2 Atlas (SOCAT) project NODC PROJECT NAMES THESAURUS Labrador Sea North Atlantic Ocean place NODC SEA AREA NAMES THESAURUS oceanography theme WMO_CategoryCode 2012-09-15 publication CA/DFO/PR/SB/IOS > Institute of Ocean Sciences, Science Branch, Pacific Region, Fisheries and Oceans, Canada 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 55001 project Cruise ID 32V320231006 project EXPOCODE Ocean Carbon and Acidification Data System (OCADS) Project project Ocean Acidification Search Keywords Northwest Atlantic Ocean and Labrador Sea project Reference Section ID AZMP & ACCASP project Research Projects EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > ALKALINITY EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > CHLOROPHYLL EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > INORGANIC CARBON EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > OXYGEN EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > PH EARTH SCIENCE > OCEANS > OCEAN TEMPERATURE > WATER TEMPERATURE EARTH SCIENCE > OCEANS > SALINITY/DENSITY > SALINITY theme Global Change Master Directory (GCMD) Science Keywords 2026 revision 23 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) Greenbelt MD https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords HTTPS GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2025. GCMD Keywords, Version 21. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords information custodian Discrete measurement Surface underway theme OCADS Study Type DIC TA pH_NBS theme Provider Variable Abbreviations PH METERS > PH METERS THERMOSALINOGRAPHS 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 DISCOVERY (ICES code: 32V3) platform ICES/SeaDataNet Ship Codes OCEAN > ATLANTIC OCEAN > NORTH 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 Labrador Sea North Atlantic Ocean place Provider Geographic Names accessLevel: Public otherRestrictions Cite as: Bélanger, David; Cyr, Frédéric; Fudge, Alexandria; Maillet, Gary; Snook, Stephen (2024). Surface underway pH, water temperature, salinity, dissolved oxygen, chlorophyll and discrete analyses of dissolved inorganic carbon and total alkalinity from the underway TSG collected during the RRS Discovery fall 2023 oceanographic survey cruise (EXPOCODE 32V320231006) in the North Atlantic Ocean and Labrador Sea from 2023-10-06 to 2023-10-26 (NCEI Accession 0299020). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.25921/g555-9q86. 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 has been dedicated to the public domain under a Creative Commons CC0 1.0 Universal (CC0 1.0) Public Domain Dedication. SPDX License: Creative Commons Zero v1.0 Universal (CC0-1.0) 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 Bélanger, David; Cyr, Frédéric; Fudge, Alexandria; Maillet, Gary; Snook, Stephen (2024). Dissolved inorganic carbon, total alkalinity, pH, temperature, salinity, dissolved oxygen, macronutrients, particulate organic carbon and nitrogen, collected from vertical profiles and discrete samples observations during the RRS Discovery Fisheries and Oceans Canada (DFO) Atlantic Zone Monitoring Program (AZMP) cruise (EXPOCODE 32V320231006) in the North Atlantic Ocean and Labrador Sea from 2023-10-06 to 2023-10-27 (NCEI Accession 0297058). NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.25921/0avm-ce46. 2024-09-12 publication International DOI Foundation (IDF) https://doi.org/10.25921/0avm-ce46 NOAA National Centers for Environmental Information gov.noaa.nodc:0297058 https://www.ncei.noaa.gov/data/oceans/ncei/ocads/metadata/0297058.html HTTPS https://www.ncei.noaa.gov/data/oceans/ncei/ocads/metadata/0297058.html Related data information Bélanger, David Fisheries and Oceans Canada, Northwest Atlantic Fisheries Centre https://www.canada.ca/en/fisheries-oceans.html HTTPS Department of Fisheries and Oceans Canada (DFO) website Institution web page information author Cyr, Frédéric Fisheries and Oceans Canada, Northwest Atlantic Fisheries Centre https://www.canada.ca/en/fisheries-oceans.html HTTPS Department of Fisheries and Oceans Canada (DFO) website Institution web page information author Fudge, Alexandria Fisheries and Oceans Canada, Northwest Atlantic Fisheries Centre https://www.canada.ca/en/fisheries-oceans.html HTTPS Department of Fisheries and Oceans Canada (DFO) website Institution web page information author Maillet, Gary Department of Fisheries and Oceans Canada (DFO) https://www.canada.ca/en/fisheries-oceans.html HTTPS Department of Fisheries and Oceans Canada (DFO) website Institution web page information author Snook, Stephen Fisheries and Oceans Canada, Northwest Atlantic Fisheries Centre https://www.canada.ca/en/fisheries-oceans.html HTTPS Department of Fisheries and Oceans Canada (DFO) website Institution web page information author NOAA National Centers for Environmental Information (NCEI) publisher tableDigital crossReference project Atlantic Zone Monitoring Program Cruises 2022 publication https://www.ncei.noaa.gov/access/ocean-carbon-acidification-data-system/oceans/RepeatSections/clivar_ar07w.html HTTPS https://www.ncei.noaa.gov/access/ocean-carbon-acidification-data-system/oceans/RepeatSections/clivar_ar07w.html related resource information NOAA National Centers for Environmental Information (NCEI) publisher documentDigital crossReference project eng; USA utf8 environment oceans -57.021 -43.001 42.078 55.065 2023-10-06 2023-10-26 This data package (Submission ID: BHXJR3L9H) 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. 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Originator data format 0.452 https://www.ncei.noaa.gov/data/oceans/ncei/ocads/metadata/0299020.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/g555-9q86 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/299020 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/299020 HTTPS Web browser HTTPS Navigate directly to the URL for data access and direct download. download ftp://ftp-oceans.ncei.noaa.gov/nodc/archive/arc0236/0299020/ 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 0299020 v1.1 was published. 2024-11-15T18:59:17Z NCEI Accession 0299020 v1.1 publication https://www.ncei.noaa.gov/archive/accession/0299020/1.1 HTTPS NCEI Accession 0299020 v1.1 published 2024-11-15T18:59:17Z download dataset Parameter or Variable: Dissolved Inorganic Carbon; Abbreviation: DIC; Unit: umol/kg; Observation type: Discrete; In-situ / Manipulation / Response variable: in-situ observation; Measured or calculated: Measured; Sampling instrument: Surface underway thermosalinograph; Analyzing instrument: Vindta 3D with 5014 coulometer; Detailed sampling and analyzing information: A flexible drawing tube was used to collect seawater from the SBE21 TSG system placed into the bottom of the 500mL glass bottle (class A borosilicate glass) and thoroughly rinsed and allowed to overflow by one full volume before filling the bottle using a tapered ground glass stopper to create a gas-tight seal. VINDTA 3D DIC Analyzer (manufactured by MARIANDA by Dr. L. Mintrop in Kiel; Germany) and interfaced to UIC 5014 Coulometer (see https://www.marianda.com/). SOP 2: Determination of total dissolved inorganic carbon in sea water from Dickson et al., 2007 (Guide to Best Practices for Ocean CO2 Measurements).; Replicate information: Samples were processed once, and duplicate measurements were collected periodically to verify precision.; Standardization description: Internal standards and CRMs are measured daily in order to calculate a 'CRM correction factor' for each day of sample processing. This is calculated by determining the standard difference between the measured DIC and the certified DIC of each CRM bottle. The CRM correction value is then applied to the samples' DIC, accounting for the instrument's daily drift or offset.; Standardization frequency: Daily; CRM manufacturer: CRM manufacturer: Dickson Lab, Scripps Institution of Oceanography, UCSD co2crms@ucsd.edu, batch # 192.; CRM batch number: 192; Preservation method: HgCl2; Preservative volume: 200 µL per 500 mL sample (0.04 %); Preservative correction: Correction Factor of 1.0004 applied to CRM-corrected data; Uncertainty: Assessed by computing the average standard deviation (SD) of duplicate water samples (average SD = 0.87; n = 7; 3D Analyzer) and CRM (average difference = ± 0.90, n = 3; 3D Analyzer); Quality flag convention: 0 = Interpolated or calculated data 1 = Not evaluated/quality unknown 2 = Acceptable 3 = Questionable 4 = Known bad 6 = Mean of replicates 9 = Missing value; Method reference: Dickson, A.G., Sabine, C.L., and Christian, J.R. (Eds.) 2007. Guide to Best Practices for Ocean CO2 Measurements. PICES Special Publication 3, 191 pp.; https://www.ncei.noaa.gov/access/ocean-carbon-acidification-data-system/oceans/Handbook_2007.html; Researcher name: Gary Maillet; Researcher institution: Fisheries and Oceans Canada Parameter or Variable: Total alkalinity; Abbreviation: TA; Unit: umol/kg; Observation type: Discrete; In-situ / Manipulation / Response variable: in-situ observation; Measured or calculated: Measured; Calculation method and parameters: Modifed GRAN plot used as input parameters for non-linear curve fitting on titration data and sample parameters (sample weight; acid density; acid concentration) and density calculated from salinity.; Sampling instrument: Surface underway thermosalinograph; Analyzing instrument: Vindta 3S with Titrino; Type of titration: Differential potentiometry using a reference electrode (Metrohm double junction electrode with 0.7 mol/L NaCl bridge electrolyte (outer compartment) and 3 mol/L KCl reference electrolyte (inner compartment)) and a glass electrode (ORION ROSS) measured against a grounded auxillary electrode.; Cell type (open or closed): open; Curve fitting method: Modifed GRAN plot used as input parameters for non-linear curve fitting on titration data and sample parameters (sample weight; acid density; acid concentration) and density calculated from salinity.; Detailed sampling and analyzing information: A flexible drawing tube was used to collect seawater from the SBE21 TSG system placed into the bottom of the 500mL glass bottle (class A borosilicate glass) and thoroughly rinsed and allowed to overflow by one full volume before filling the bottle using a tapered ground glass stopper to create a gas-tight seal. VINDTA 3S TA Analyzer (manufactured by MARIANDA by Dr. L. Mintrop; Kiel; Germany) see https://www.marianda.com/. SOP 3b: Determination of total alkalinity in sea water using an open-cell titration from Dickson et al., 2007 (Guide to Best Practices for Ocean CO2 Measurements).; Replicate information: Samples were processed once, and duplicate measurements were collected periodically to verify precision.; Standardization description: Internal standards and CRMs are measured daily in order to calculate a 'CRM correction factor' for each day of sample processing. This is calculated by determining the standard difference between the measured DIC and the certified DIC of each CRM bottle. The CRM correction value is then applied to the samples' DIC, accounting for the instrument's daily drift or offset.; Standardization frequency: Daily; CRM manufacturer: CRM manufacturer: Dickson Lab, Scripps Institution of Oceanography, UCSD co2crms@ucsd.edu, batch # 192.; CRM batch number: 192; Preservation method: HgCl2; Preservative volume: 200 µL per 500 mL sample (0.04 %); Preservative correction: Correction Factor of 1.0004 applied to CRM-corrected data; TA blank correction: TA was not corrected for blank; Uncertainty: Assessed by computing the average standard deviation (SD) of duplicate water samples (average SD = 0.36; n = 6; 3S Analyzer) and CRM (average difference = ± 0.05, n = 2; 3S Analyzer); Quality flag convention: 0 = Interpolated or calculated data 1 = Not evaluated/quality unknown 2 = Acceptable 3 = Questionable 4 = Known bad 6 = Mean of replicates 9 = Missing value; Method reference: Dickson, A.G., Sabine, C.L., and Christian, J.R. (Eds.) 2007. Guide to Best Practices for Ocean CO2 Measurements. PICES Special Publication 3, 191 pp.; https://www.ncei.noaa.gov/access/ocean-carbon-acidification-data-system/oceans/Handbook_2007.html; Researcher name: Gary Maillet; Researcher institution: Fisheries and Oceans Canada Parameter or Variable: pH; Abbreviation: pH_NBS; pH scale: NBS scale (NBS or NIST); Observation type: continuous; In-situ / Manipulation / Response variable: in-situ observation; Measured or calculated: Measured; Sampling instrument: SBE 18 pH sensor interfaced to a SBE21 TSG; Analyzing instrument: SeaBird SBE-18 pH sensor; Detailed sampling and analyzing information: Measurement collected hourly at discrete location while underway using a SBE 18 pH sensor interfaced to a SBE21 TSG.; Replicate information: Only primary pH sensor installed on SBE21 TSG; Standardization description: In-situ pH derived from daily CTD-SBE-18 discrete pH measurements near surface are compared with underway pH sensor values to detect potential suspect/bad data and to calibrate observations.; Standardization frequency: unknown; pH standard values: unknown; Temperature of standardization: unknown; Temperature correction method: unknown; At what temperature was pH reported: In-situ; Uncertainty: Initial accuracy = ± 0.1 pH units (NBS scale); Quality flag convention: 0 = Interpolated or calculated data 1 = Not evaluated/quality unknown 2 = Acceptable 3 = Questionable 4 = Known bad 6 = Mean of replicates 9 = Missing value; Method reference: https://www.seabird.com/ph-sensors/sbe-18-ph-sensor/family?productCategoryId=54627869929; Researcher name: Gary Maillet; Researcher institution: Fisheries and Oceans Canada asNeeded Metadata are developed, maintained and distributed by NCEI. Updates are performed as needed to maintain currentness. NOAA National Centers for Environmental Information custodian 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. thermosalinograph thermosalinograph automated sea surface temperature and salinity instrument, usually attached to the hull of a ship Thermosalinograph is an automated Sea Surface Temperature and Salinity measurement system making measurement on board a ship using a water intake. [https://www.aoml.noaa.gov/phod/tsg/about.php 2021-01-29] DISCOVERY Flag: United States of America Vessel Type: Fishing Vessel DOB: 1969 IMO: 7100940 Former Name: Capt. Rose