gov.noaa.nodc:0304117 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 2025-11-29T08:15:43Z 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, dissolved oxygen concentration, water temperature and salinity collected from profile, discrete sampling, and time series observations during the R/V Gulf Challenger cruises near the Mooring buoy NH_70W_43N off the coast of New Hampshire, U.S. in the Gulf of Maine from 2023-01-25 to 2023-10-05 (NCEI Accession 0304117) 2025-05-09 publication 2025-05-08 creation International DOI Foundation (IDF) 10.25921/mn8n-n674 NOAA National Centers for Environmental Information gov.noaa.nodc:0304117 NCEI Archive Management System 0304117 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 Christopher W. Hunt University of New Hampshire (UNH) chunt@unh.edu resourceProvider University of New Hampshire (UNH) resourceProvider Christopher Hunt University of New Hampshire (UNH) chunt@unh.edu principalInvestigator Douglas Vandemark University of New Hampshire (UNH) doug.vandemark@unh.edu principalInvestigator Shawn Shellito University of New Hampshire (UNH) shawn.shellito@unh.edu principalInvestigator Joseph Salisbury University of New Hampshire (UNH) Joe.Salisbury@unh.edu collaborator Hunt, Christopher W. University of New Hampshire (UNH) author Vandemark, Douglas University of New Hampshire (UNH) doug.vandemark@unh.edu author Salisbury, Joseph E. University of New Hampshire (UNH) author University of New Hampshire (UNH) contributor tableDigital This data set consists of dissolved inorganic carbon, total alkalinity, pH, dissolved oxygen concentration, water temperature and salinity collected from profile, discrete sampling, and time series observations during the R/V Gulf Challenger cruises near the Mooring buoy NH_70W_43N off the coast of New Hampshire, U.S. in the Gulf of Maine from 2023-01-25 to 2023-10-05. Additionally, an underway pCO2 measurement system was operated on some of these cruises, and surface underway pCO2 data are included in this archival package. 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 https://www.ncei.noaa.gov/access/metadata/landing-page/bin/gfx?id=gov.noaa.nodc:0304117 Preview graphic PNG 0304117 NCEI ACCESSION NUMBER 2025-05-07 publication DISSOLVED INORGANIC CARBON (DIC) DISSOLVED OXYGEN partial pressure of carbon dioxide - water pH SALINITY total alkalinity WATER TEMPERATURE theme NODC DATA TYPES THESAURUS carbon dioxide (CO2) gas analyzer CTD Niskin bottle oxygen sensor pH sensor salinometer temperature sensor titrator instrument NODC INSTRUMENT TYPES THESAURUS chemical discrete sample profile surface underway theme NODC OBSERVATION TYPES THESAURUS GULF CHALLENGER platform NODC PLATFORM NAMES THESAURUS University of New Hampshire dataCentre NODC COLLECTING INSTITUTION NAMES THESAURUS University of New Hampshire dataCentre NODC SUBMITTING INSTITUTION NAMES THESAURUS Ocean Carbon and Acidification Data System (OCADS) project NODC PROJECT NAMES THESAURUS Gulf of Maine North Atlantic Ocean place NODC SEA AREA NAMES THESAURUS oceanography theme WMO_CategoryCode 2012-09-15 publication Coastal Cruises project Cruise ID 33GC20230705 33GC20230801 33GC20230807 33GC20230907 33GC20231005 project EXPOCODE 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 > 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 Profile theme OCADS Study Type DIC Talk pCO2a pH theme Provider Variable Abbreviations CO2 ANALYZERS > CO2 ANALYZERS CTD > Conductivity, Temperature, Depth NISKIN BOTTLES OXYGEN METERS > OXYGEN METERS PH METERS > PH METERS SALINOMETERS 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 GULF CHALLENGER (ICES code: 33GC) platform ICES/SeaDataNet Ship Codes OCEAN > ATLANTIC OCEAN > NORTH ATLANTIC OCEAN OCEAN > ATLANTIC OCEAN > NORTH ATLANTIC OCEAN > GULF OF MAINE 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 Maine North Atlantic Ocean place Provider Geographic Names accessLevel: Public otherRestrictions Cite as: Hunt, Christopher W.; Vandemark, Douglas; Salisbury, Joseph E. (2025). Dissolved inorganic carbon, total alkalinity, pH, dissolved oxygen concentration, water temperature and salinity collected from profile, discrete sampling, and time series observations during the R/V Gulf Challenger cruises near the Mooring buoy NH_70W_43N off the coast of New Hampshire, U.S. in the Gulf of Maine from 2023-01-25 to 2023-10-05 (NCEI Accession 0304117). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.25921/mn8n-n674. 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 Time Series and Coastal Cruises: Gulf of Maine. 2022 publication https://www.ncei.noaa.gov/access/ocean-carbon-acidification-data-system/oceans/Coastal/unh_ts.html HTTPS https://www.ncei.noaa.gov/access/ocean-carbon-acidification-data-system/oceans/Coastal/unh_ts.html related resource information NOAA National Centers for Environmental Information (NCEI) publisher documentDigital crossReference project eng; USA utf8 environment oceans -70.543 -70.539 43.0193 43.023 2023-01-25 2023-10-05 This data package (Submission ID: BH9R9KJVP) 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 0.204 https://www.ncei.noaa.gov/data/oceans/ncei/ocads/metadata/0304117.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/mn8n-n674 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/304117 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/304117 HTTPS Web browser HTTPS Navigate directly to the URL for data access and direct download. download ftp://ftp-oceans.ncei.noaa.gov/nodc/archive/arc0232/0304117/ 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 0304117 v1.1 was published. 2025-05-09T19:33:41Z NCEI Accession 0304117 v1.1 publication https://www.ncei.noaa.gov/archive/accession/0304117/1.1 HTTPS NCEI Accession 0304117 v1.1 published 2025-05-09T19:33:41Z download dataset Parameter or Variable: Dissolved Inorganic Carbon; Abbreviation: DIC; Unit: umol/kg; Observation type: profile; In-situ / Manipulation / Response variable: in-situ observation; Measured or calculated: MEASURED; Analyzing instrument: Apollo SciTech AS-C2; Detailed sampling and analyzing information: Discrete samples were collected from Niskin bottles and transferred to sample bottles through silicone tubing to prevent bubbling. Samples for pH, total alkalinity, and DIC were transferred without bubbling into 60-ml or 125-ml glass BOD bottles with greased stoppers. These were filled to leave less than 1 % headspace in the bottle, preserved with 0.1 ml of saturated mercuric chloride solution, and immediately cooled. Samples for DIC were generally stored for several weeks before analysis, allowing for settling of particulate material, with the supernatant sample drawn for analysis. DIC of unfiltered water was determined using an automated analyzer built by Apollo SciTech (Bogart, GA). Immediately after opening the sample bottle, a digital syringe withdrew a small amount of sample (0.5 mL), acidified it with 10 % phosphoric acid and subsequently measured the evolved CO2 with a Li-Cor 6262 non-dispersive infrared gas analyzer; Standardization description: Certified seawater reference materials from Dr. A. Dickson were used to determine DIC concentration by preparing a calibration curve covering the range of DIC from 200 to 2000 umol/kg, with a resulting average precision of 0.1 % (2 umol/kg ).; Standardization frequency: daily; CRM manufacturer: Dickson Lab, Scripps; CRM batch number: various; Preservation method: HgCL2; Preservative volume: 0.1 mL saturated HgCl2; Uncertainty: 0.1% Parameter or Variable: Total alkalinity; Abbreviation: Talk; Unit: umol/kg; Observation type: profile; In-situ / Manipulation / Response variable: in-situ observation; Measured or calculated: MEASURED; Analyzing instrument: Custom Titrator, Based on Metrohm Dosimat; Cell type (open or closed): OPEN; Curve fitting method: Gran; Detailed sampling and analyzing information: Discrete samples were collected from Niskin bottles and transferred to sample bottles through silicone tubing to prevent bubbling. Samples for pH, total alkalinity, and DIC were transferred without bubbling into 300-ml or 500-ml glass BOD bottles with greased stoppers. These were filled to leave less than 1 % headspace in the bottle, preserved with 0.03% v/v saturated mercuric chloride solution, and immediately cooled. Samples for total alkalinity/pH and DIC were generally stored for several weeks before analysis, allowing for settling of particulate material, with the supernatant sample drawn for analysis. TAlk was measured by Gran titration (Gran 1952) with 0.1 N HCl using an automated titrator. This method adds an initial aliquot of acid to the sample in an open cell, generally lowering the sample pH below 3.5, and then adds subsequent aliquots of titrant until the pH changes linearly with the volume of acid added. The TAlk endpoint is then obtained from linear regression of the change of pH against the volume of acid added, according to a Gran transformation; Standardization description: Multiple analyses of the Dickson reference material resulted in a calculated precision of this method of about 0.1 % (or �2 umol kg-1 ). The accuracy of the TAlk automated system, also calibrated with multiple batches of the Dickson CRM as discussed above, was +/-3 umol kg-1.; Standardization frequency: daily; CRM manufacturer: Dickson Lab, Scripps; CRM batch number: various; Preservation method: HgCl2; Preservative volume: 0.1 mL saturated HgCl2; Uncertainty: 0.1% Parameter or Variable: pH; Abbreviation: pH; pH scale: TOTALSCALE(T); In-situ / Manipulation / Response variable: in-situ observation; Measured or calculated: MEASURED; Calculation method and parameters: Douglas and Byrne 2017, Marine Chemistry 197: 64-69; Sampling instrument: Niskin bottle; Analyzing instrument: Metrohm Dosimat with custom software; Detailed sampling and analyzing information: Discrete samples were collected from Niskin bottles and transferred to sample bottles through silicone tubing to prevent bubbling. Samples for pH were transferred without bubbling into 125-ml or 300-mL glass BOD bottles with greased stoppers. These were filled to leave less than 1 % headspace in the bottle, preserved with 0.1-0.3 ml of saturated mercuric chloride solution, and immediately cooled. Samples for pH were generally stored for several weeks before analysis, allowing for settling of particulate material, with the supernatant sample drawn for analysis. Samples were brought to 25 degrees C in a water bath, which was also used to maintain the temperature of the spectrophotometer measurements pH was measured spectrophotometrically using an Agilent technologies Cary UV-Vis spectrophotometer. 10-cm cells were filled with sample via a siphon tube, and the sample was maintained at 25 degrees C in a customized temperature-controlled box. After a blank measurement, 0.1 mL of metacresol purple (mCP) was added to each sample, and the R ratio of absorbances at 578 nm and 434 nm were used to determine the pH, as described by Douglas and Byrne 2017. To correct for pH effect of mCP, a second mCP addition and pH measurement were made, and the resulting two pH measurements used to correct to a pH with zero mCP.; At what temperature was pH reported: 25; Uncertainty: 0.001 Parameter or Variable: pCO2 (fCO2) autonomous; Abbreviation: pCO2a; Unit: uatm; Observation type: surface underway; In-situ / Manipulation / Response variable: in-situ observation; Measured or calculated: MEASURED; Sampling instrument: Gas equilibrator; Analyzing instrument: Li-cor LI840; Detailed sampling and analyzing information: "Flow to the shipboard flow-through system was pumped to an equilibrator, similar to that described by Wanninkhof and Thoning (1993), but consisting of three Plexiglas chambers instead of a single chamber. Equilibrated air was drawn out of the third chamber, while ambient air was drawn into the first chamber and passed through the second and third chambers, equilibrating with the pumped water supply at each step.; Equilibrator volume: 6; Is the equilibrator vented or not: vented; Water flow rate: 10; How was temperature inside the equilibrator measured: not measured; How was pressure inside the equilibrator measured: not measured; Drying method for gas: Nafion selectively permeable membrane (Perma Pure, Toms River NJ) with a counterflowing stream of dry nitrogen, which dried the sample gas stream of water vapor; SEA CO2 gas detector manufacturer: Li-cor; SEA CO2 gas detector model: 840; At what temperature was pCO2 reported: in-situ 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. CTD CTD Conductivity-Temperature-Depth probe Niskin bottle Niskin bottle Device for obtaining samples of seawater at a specific depth Why special entry for Niskin bottle but no entry for Nansen bottle? oxygen sensor oxygen sensor Any instrument that measures oxygen content in a compound. 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. salinometer salinometer generic salinometer use salinometer when the instrument type used is unclear but the data include salinity measurements temperature sensor temperature sensor A sensor used to measure temperature. titrator titrator titrator GULF CHALLENGER UNIVERSITY OF NEW HAMPSHIRE