gov.noaa.nodc:0252613 eng utf8 dataset NOAA National Centers for Environmental Information ncei.info@noaa.gov https://www.ncei.noaa.gov/contact HTTPS NOAA Contact Information Information for contacts at NCEI. information custodian 2026-07-25T07:45:05Z ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) Dissolved inorganic carbon (DIC) and total alkalinity (TA) and other hydrographic and chemical data collected from discrete sample and profile observations aboard the RV Sikuliaq Cruise SKQ202014S (EXPOCODE 33BI20201025) in the Bering and Chukchi Sea along transect lines in the Distributed Biological Observatory (DBO) from 2020-10-25 to 2020-11-11 (NCEI Accession 0252613) 2022-04-26 publication 2022-04-25 creation International DOI Foundation (IDF) 10.25921/pnsd-sv10 NOAA National Centers for Environmental Information gov.noaa.nodc:0252613 NCEI Archive Management System 0252613 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 Natalie M. Monacci University of Alaska Fairbanks (UAF) nmonacci@alaska.edu https://www.uaf.edu/ HTTPS University of Alaska Fairbanks (UAF) website Institution web page information resourceProvider University of Alaska Fairbanks (UAF) https://www.uaf.edu/ HTTPS University of Alaska Fairbanks (UAF) website Institution web page information resourceProvider Natalie Monacci University of Alaska Fairbanks (UAF) nmonacci@alaska.edu https://www.uaf.edu/ HTTPS University of Alaska Fairbanks (UAF) website Institution web page information principalInvestigator Jessica Cross NOAA Pacific Marine Environmental Laboratory (PMEL) jessica.cross@noaa.gov https://www.pmel.noaa.gov/ HTTPS NOAA Pacific Marine Environmental Laboratory (PMEL) website Institution web page information principalInvestigator Robert Pickart Woods Hole Oceanographic Institution (WHOI) rpickart@whoi.edu http://www.whoi.edu HTTP Woods Hole Oceanographic Institution (WHOI) website Institution web page information principalInvestigator Laurie Juranek Oregon State University, College of Earth, Ocean, and Atmospheric Sciences (OSU-CEOAS) laurie.juranek@oregonstate.edu http://ceoas.oregonstate.edu/ HTTP Oregon State University, College of Earth, Ocean, and Atmospheric Sciences (OSU-CEOAS) website Institution web page information principalInvestigator Susan Becker Scripps Institution of Oceanography (SIO) sbecker@ucsd.edu https://scripps.ucsd.edu/ HTTPS Scripps Institution of Oceanography (SIO) website Institution web page information principalInvestigator Leah McRaven Woods Hole Oceanographic Institution (WHOI) lmcraven@whoi.edu http://www.whoi.edu HTTP Woods Hole Oceanographic Institution (WHOI) website Institution web page information principalInvestigator Monacci, Natalie M. University of Alaska Fairbanks https://www.uaf.edu/ HTTPS University of Alaska Fairbanks (UAF) website Institution web page information author Cross, Jessica N. NOAA Pacific Marine Environmental Laboratory https://www.pmel.noaa.gov/ HTTPS NOAA Pacific Marine Environmental Laboratory (PMEL) website Institution web page information author Pickart, Robert S. Woods Hole Oceanographic Institution http://www.whoi.edu HTTP Woods Hole Oceanographic Institution (WHOI) website Institution web page information author Juranek, Laurie W. Oregon State University, College of Earth, Ocean, and Atmospheric Sciences http://ceoas.oregonstate.edu/ HTTP Oregon State University, College of Earth, Ocean, and Atmospheric Sciences (OSU-CEOAS) website Institution web page information author McRaven, Leah T. Woods Hole Oceanographic Institution http://www.whoi.edu HTTP Woods Hole Oceanographic Institution (WHOI) website Institution web page information author Becker, Susan Scripps Institution of Oceanography https://scripps.ucsd.edu/ HTTPS Scripps Institution of Oceanography (SIO) website Institution web page information author Oregon State University (OSU) http://oregonstate.edu/ HTTP Oregon State University (OSU) website Institution web page information contributor University of Alaska Fairbanks (UAF) https://www.uaf.edu/ HTTPS University of Alaska Fairbanks (UAF) website Institution web page information contributor Woods Hole Oceanographic Institution (WHOI) http://www.whoi.edu HTTP Woods Hole Oceanographic Institution (WHOI) website Institution web page information contributor NOAA Pacific Marine Environmental Laboratory (PMEL) https://www.pmel.noaa.gov/ HTTPS NOAA Pacific Marine Environmental Laboratory (PMEL) website Institution web page information contributor Scripps Institution of Oceanography (SIO) https://scripps.ucsd.edu/ HTTPS Scripps Institution of Oceanography (SIO) website Institution web page information contributor tableDigital This dataset contains the discrete bottle (CTD profile) data of the only cruise that took place in the US Arctic during the 2020 COVID-19 related field work shutdown. The cruise took place from October 15, 2020 to November 19, 2020 aboard the R/V Sikuliaq, departing from and returning to Seward, AK. 148 casts were occupied in the Bering and Chukchi Seas around Alaska. At all stations, CTD casts were conducted, and discrete water samples were collected in Niskin bottles. The cruise was part of the project entitled “Monitoring the Western Arctic Boundary Current in a Warming Climate: Atmospheric Forcing and Oceanographic Response”, funded by the National Science Foundation as part of the Arctic Observing Network (AON) to Robert Pickart at WHOI. A number of ancillary projects were also carried out taking advantage of a ship of opportunity during the COVID-19 shutdown. The marine carbonate data to investigate ocean acidification were collected as an ancillary project to visit the Distributed Biological Observatory (DBO), funded by the NOAA Arctic Research Program to Jessica Cross at NOAA PMEL and Natalie Monacci at UAF. The Distributed Biological Observatory (DBO) is envisioned as a change detection array along a latitudinal gradient extending from the northern Bering Sea to the Barrow Arc. DBO sampling is focused on transects centered on locations of high productivity, biodiversity and rates of biological change. Funding Information: NOAA (NOAA Arctic Research Program: Distributed Biological Observatory) 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:0252613 Preview graphic PNG 0252613 NCEI ACCESSION NUMBER 2022-04-13 publication DISSOLVED INORGANIC CARBON (DIC) DISSOLVED OXYGEN NITRATE NITRITE phosphate SALINITY silicate total alkalinity WATER TEMPERATURE theme NODC DATA TYPES THESAURUS bottle carbon dioxide (CO2) gas analyzer CTD titrator instrument NODC INSTRUMENT TYPES THESAURUS chemical discrete sample physical profile theme NODC OBSERVATION TYPES THESAURUS Sikuliaq platform NODC PLATFORM NAMES THESAURUS NOAA Pacific Marine Environmental Laboratory Oregon State University Scripps Institution of Oceanography University of Alaska Fairbanks Woods Hole Oceanographic Institution dataCentre NODC COLLECTING INSTITUTION NAMES THESAURUS University of Alaska Fairbanks dataCentre NODC SUBMITTING INSTITUTION NAMES THESAURUS Ocean Carbon and Acidification Data System (OCADS) project NODC PROJECT NAMES THESAURUS Bering Sea Chukchi Sea place NODC SEA AREA NAMES THESAURUS oceanography theme WMO_CategoryCode 2012-09-15 publication DOC/NOAA/OAR/PMEL > Pacific Marine Environmental Laboratory, OAR, NOAA, U.S. Department of Commerce WHOI > WOODS HOLE OCEANOGRAPHIC INSTITUTION dataCentre Global Change Master Directory (GCMD) Data Center Keywords 2026 revision 24 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) Greenbelt MD https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords HTTPS GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2025. GCMD Keywords, Version 21. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords information custodian SKQ202014S project Cruise ID 33BI20201025 project EXPOCODE Ocean Carbon and Acidification Data System (OCADS) Project project Ocean Acidification Search Keywords Arctic Observing Network (AON) Distributed Biological Observatory (DBO) project Research Projects EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > ALKALINITY EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > INORGANIC CARBON EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > NITRATE EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > NITRITE EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > OXYGEN EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > PHOSPHATE EARTH SCIENCE > OCEANS > OCEAN CHEMISTRY > SILICATE EARTH SCIENCE > OCEANS > OCEAN TEMPERATURE > WATER TEMPERATURE EARTH SCIENCE > OCEANS > SALINITY/DENSITY > SALINITY theme Global Change Master Directory (GCMD) Science Keywords 2026 revision 24 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) Greenbelt MD https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords HTTPS GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2025. GCMD Keywords, Version 21. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords information custodian Discrete measurement Profile theme OCADS Study Type CTDOXY CTDSAL_PSS78 CTDTEMP_ITS90 DIC Nitrate Nitrite Oxygen Phosphate Salinity_PSS78 Silicate TA theme Provider Variable Abbreviations CO2 ANALYZERS > CO2 ANALYZERS CTD > Conductivity, Temperature, Depth instrument Global Change Master Directory (GCMD) Instrument Keywords 2026 revision 24 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) Greenbelt MD https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords HTTPS GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2025. GCMD Keywords, Version 21. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords information custodian Ships platform Global Change Master Directory (GCMD) Platform Keywords 2026 revision 24 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) Greenbelt MD https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords HTTPS GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2025. GCMD Keywords, Version 21. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords information custodian Sikuliaq (call sign: WDN7246, ICES code: 33BI, 2013-) platform ICES/SeaDataNet Ship Codes OCEAN > ARCTIC OCEAN > CHUKCHI SEA OCEAN > PACIFIC OCEAN > NORTH PACIFIC OCEAN > BERING SEA place Global Change Master Directory (GCMD) Location Keywords 2026 revision 24 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) Greenbelt MD https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords HTTPS GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2025. GCMD Keywords, Version 21. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords information custodian Arctic Ocean Bering Sea Chukchi Sea place Provider Geographic Names accessLevel: public otherRestrictions Cite as: Monacci, Natalie M.; Cross, Jessica N.; Pickart, Robert S.; Juranek, Laurie W.; McRaven, Leah T.; Becker, Susan (2022). Dissolved inorganic carbon (DIC) and total alkalinity (TA) and other hydrographic and chemical data collected from discrete sample and profile observations aboard the RV Sikuliaq Cruise SKQ202014S (EXPOCODE 33BI20201025) in the Bering and Chukchi Sea along transect lines in the Distributed Biological Observatory (DBO) from 2020-10-25 to 2020-11-11 (NCEI Accession 0252613). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.25921/pnsd-sv10. 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. Chukchi Sea, Bering Sea Cruises 2022 publication https://www.ncei.noaa.gov/access/ocean-carbon-acidification-data-system/oceans/RepeatSections/clivar_Chukchi_Sea.html HTTPS https://www.ncei.noaa.gov/access/ocean-carbon-acidification-data-system/oceans/RepeatSections/clivar_Chukchi_Sea.html Related resource information NOAA National Centers for Environmental Information (NCEI) publisher documentDigital crossReference project NOAA National Centers for Environmental Information (2022). Ocean Carbon and Acidification Data System (OCADS). NOAA National Centers for Environmental Information. https://www.ncei.noaa.gov/products/ocean-carbon-acidification-data-system 2022-04 publication https://www.ncei.noaa.gov/products/ocean-carbon-acidification-data-system HTTPS https://www.ncei.noaa.gov/products/ocean-carbon-acidification-data-system OCADS website information NOAA National Centers for Environmental Information author NOAA National Centers for Environmental Information (NCEI) publisher documentDigital [accessed 2024-02-08] crossReference program Monacci, Natalie M.; Alin, Simone R.; Bell, Shaun W.; Danielson, Seth L.; Grebmeier, Jacqueline M.; Mordy, Calvin; Sandy, Savannah; Stabeno, Phyllis J. (2025). Dissolved inorganic carbon (DIC) and total alkalinity (TA) and other hydrographic and chemical data collected from discrete sample and profile observations during the R/V Sikuliaq cruise SKQ202312s (EXPOCODE 33BI20230914) in the Bering and Chukchi Sea along transect lines in the Distributed Biological Observatory (DBO) from 2023-09-14 to 2023-10-03 (NCEI Accession 0304115). NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.25921/rgh8-6067. 2025-05-09 publication International DOI Foundation (IDF) https://doi.org/10.25921/rgh8-6067 NOAA National Centers for Environmental Information gov.noaa.nodc:0304115 https://www.ncei.noaa.gov/data/oceans/ncei/ocads/metadata/0304115.html HTTPS https://www.ncei.noaa.gov/data/oceans/ncei/ocads/metadata/0304115.html Related dataset information Monacci, Natalie M. University of Alaska Fairbanks https://www.uaf.edu/ HTTPS University of Alaska Fairbanks (UAF) website Institution web page information author Alin, Simone R. NOAA Pacific Marine Environmental Laboratory https://www.pmel.noaa.gov/ HTTPS NOAA Pacific Marine Environmental Laboratory (PMEL) website Institution web page information author Bell, Shaun W. NOAA Pacific Marine Environmental Laboratory https://www.pmel.noaa.gov/ HTTPS NOAA Pacific Marine Environmental Laboratory (PMEL) website Institution web page information author Danielson, Seth L. University of Alaska Fairbanks https://www.uaf.edu/ HTTPS University of Alaska Fairbanks (UAF) website Institution web page information author Grebmeier, Jacqueline M. Chesapeake Biological Laboratory http://www.umces.edu/ HTTP University of Maryland Center for Environmental Science (UMCES) website Institution web page information author Mordy, Calvin University of Washington Cooperative Institute for Climate, Ocean and Ecosystem Studies, under grant from NOAA Pacific Marine Environmental Laboratory https://cicoes.uw.edu/ HTTPS University of Washington Cooperative Institute for Climate, Ocean and Ecosystem Studies (CICOES) website Institution web page information author Sandy, Savannah University of Alaska Fairbanks https://www.uaf.edu/ HTTPS University of Alaska Fairbanks (UAF) website Institution web page information author Stabeno, Phyllis J. NOAA Pacific Marine Environmental Laboratory https://www.pmel.noaa.gov/ HTTPS NOAA Pacific Marine Environmental Laboratory (PMEL) website Institution web page information author NOAA National Centers for Environmental Information (NCEI) publisher tableDigital crossReference project Monacci, Natalie M.; Alin, Simone R.; Bell, Shaun W.; Danielson, Seth L.; Grebmeier, Jacqueline M.; Mordy, Calvin; Sandy, Savannah; Stabeno, Phyllis J. (2025). Dissolved inorganic carbon (DIC) and total alkalinity (TA) and other hydrographic and chemical data collected from discrete sample and profile observations during the R/V Sikuliaq cruise SKQ202412s (EXPOCODE 33BI20240807) in the Bering and Chukchi Sea along transect lines in the Distributed Biological Observatory (DBO) from 2024-08-07 to 2024-08-26 (NCEI Accession 0304116). NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.25921/vzrm-dc63. 2025-05-09 publication International DOI Foundation (IDF) https://doi.org/10.25921/vzrm-dc63 NOAA National Centers for Environmental Information gov.noaa.nodc:0304116 https://www.ncei.noaa.gov/data/oceans/ncei/ocads/metadata/0304116.html HTTPS https://www.ncei.noaa.gov/data/oceans/ncei/ocads/metadata/0304116.html Related dataset information Monacci, Natalie M. University of Alaska Fairbanks https://www.uaf.edu/ HTTPS University of Alaska Fairbanks (UAF) website Institution web page information author Alin, Simone R. NOAA Pacific Marine Environmental Laboratory https://www.pmel.noaa.gov/ HTTPS NOAA Pacific Marine Environmental Laboratory (PMEL) website Institution web page information author Bell, Shaun W. NOAA Pacific Marine Environmental Laboratory https://www.pmel.noaa.gov/ HTTPS NOAA Pacific Marine Environmental Laboratory (PMEL) website Institution web page information author Danielson, Seth L. University of Alaska Fairbanks https://www.uaf.edu/ HTTPS University of Alaska Fairbanks (UAF) website Institution web page information author Grebmeier, Jacqueline M. Chesapeake Biological Laboratory http://www.umces.edu/ HTTP University of Maryland Center for Environmental Science (UMCES) website Institution web page information author Mordy, Calvin University of Washingon CICOES author Sandy, Savannah University of Alaska Fairbanks https://www.uaf.edu/ HTTPS University of Alaska Fairbanks (UAF) website Institution web page information author Stabeno, Phyllis J. NOAA Pacific Marine Environmental Laboratory https://www.pmel.noaa.gov/ HTTPS NOAA Pacific Marine Environmental Laboratory (PMEL) website Institution web page information author NOAA National Centers for Environmental Information (NCEI) publisher tableDigital crossReference project eng; USA utf8 environment oceans -169.3 -147.1 65.4 72.3 2020-10-25 2020-11-11 This data package (Submission ID: BF0SMTRJR) 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. 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 0.428 https://www.ncei.noaa.gov/data/oceans/ncei/ocads/metadata/0252613.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/pnsd-sv10 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/252613 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/252613 HTTPS Web browser HTTPS Navigate directly to the URL for data access and direct download. download ftp://ftp-oceans.ncei.noaa.gov/nodc/archive/arc0200/0252613/ 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 0252613 v1.1 was published. 2022-04-26T18:30:44Z NCEI Accession 0252613 v1.1 publication https://www.ncei.noaa.gov/archive/accession/0252613/1.1 HTTPS NCEI Accession 0252613 v1.1 published 2022-04-26T18:30:44Z download dataset Parameter or Variable: Dissolved Inorganic Carbon; Abbreviation: DIC; Unit: umol kg-1; Observation type: Profile (discrete samples); In-situ / Manipulation / Response variable: in-situ observation; Measured or calculated: Measured; Sampling instrument: Niskin bottle; Analyzing instrument: AIRICA; Detailed sampling and analyzing information: The Automated Infra Red Inorganic Carbon Analyzer (AIRICA) by Marianda paired with a LiCOR LI-7000 Automated CO2 Analyzer was used to conduct an IR-detection of carbon dioxide with a carrier gas. Data flags: 1 = not calibrated, 2 = good, 3 = questionable, 4 = bad, 5 = not reported, 6 = interpolated over > 2 dbar interval, 7 = despiked, 8 = not assigned for CTD data, 9 = not sampled; Standardization description: The samples were standardized using Certified Reference Materials (CRMs) provided by Dr. A. Dickson of Scripps Institution of Oceanography.; Standardization frequency: Daily; CRM manufacturer: UCSD; CRM batch number: 185, 190; Preservation method: HgCl2; Preservative volume: Saturated, 200 uL; Preservative correction: none; Uncertainty: 2 umol kg-1; Quality flag convention: Data flags: 1 = not calibrated, 2 = good, 3 = questionable, 4 = bad, 5 = not reported, 6 = interpolated over > 2 dbar interval, 7 = despiked, 8 = not assigned for CTD data, 9 = not sampled; Method reference: Mathis, J.T., J.N. Cross, W. Evans, and S.C. Doney. 2015. Ocean acidification in the surface waters of the Pacific-Arctic boundary regions. Oceanography 28(2):122-135, https://doi.org/10.5670/ oceanog.2015.36.; Researcher name: Natalie Monacci; Researcher institution: UAF Parameter or Variable: Total alkalinity; Abbreviation: TA; Unit: umol kg-1; Observation type: Profile (discrete samples); In-situ / Manipulation / Response variable: in-situ observation; Measured or calculated: Measured; Sampling instrument: Niskin bottle; Analyzing instrument: VINDTA; Type of titration: Potentiometric; Cell type (open or closed): open; Curve fitting method: GRAN plot; Detailed sampling and analyzing information: The Versatile INstrument for the Determination of Total inorganic and titration of Alkalinity (VINDTA) by Marianda was used to conduct a potentiometric alkalinity titration with an open cell.; Standardization description: The samples were standardized using Certified Reference Materials (CRMs) provided by Dr. A. Dickson of Scripps Institution of Oceanography.; Standardization frequency: Daily; CRM manufacturer: UCSD; CRM batch number: 185, 190; Preservation method: HgCl2; Preservative volume: Saturated, 200 uL; Preservative correction: none; Uncertainty: 2 umol kg-1; Quality flag convention: Data flags: 1 = not calibrated, 2 = good, 3 = questionable, 4 = bad, 5 = not reported, 6 = interpolated over > 2 dbar interval, 7 = despiked, 8 = not assigned for CTD data, 9 = not sampled; Method reference: Mathis, J. T., Cross, J. N., Bates, N. R., Bradley Moran, S., Lomas, M. W., Mordy, C. W., and Stabeno, P. J. 2010. Seasonal distribution of dissolved inorganic carbon and net community production on the Bering and Chukchi Sea shelf, Biogeosciences, 7, 1769-1787, https://doi.org/10.5194/bg-7-1769-2010.; Researcher name: Natalie Monacci; Researcher institution: UAF Parameter or Variable: CTD Temperature; Abbreviation: CTDTEMP_ITS90; Unit: DEG C (ITS-90); Observation type: Profile (CTD continuous); In-situ / Manipulation / Response variable: in-situ observation; Measured or calculated: Measured; Sampling instrument: CTD (conductivity, temperature and depth); Detailed sampling and analyzing information: A profiling CTD 911 was used to collect the conductivity, temperature, and depth data at each station. Data are processed using Seabird CTD software and calibration file. Post-processing at WHOI includes filtering extreme outliers, extrapolation of values from the top value collected at ~3-5m to the surface. Each cast is visually reviewed for reasonableness and density inversions (greater than 0.02 sigma-t) caused by spurious measurements. This process is facilitated by comparison of the outputs of the 2 temperature and conductivity sensors. Profile data are bin-averaged to 1 meter.; Uncertainty: 0.002; Quality flag convention: Data flags: 1 = not calibrated, 2 = good, 3 = questionable, 4 = bad, 5 = not reported, 6 = interpolated over > 2 dbar interval, 7 = despiked, 8 = not assigned for CTD data, 9 = not sampled; Researcher name: Leah McRaven; Researcher institution: WHOI Parameter or Variable: CTD Salinity; Abbreviation: CTDSAL_PSS78; Unit: PSU (PSS-78); Observation type: Profile (CTD continuous); Measured or calculated: Calculated; Sampling instrument: CTD (conductivity, temperature and depth); Detailed sampling and analyzing information: A profiling CTD 911 was used to collect the conductivity, temperature, and depth data at each station. Data are processed using Seabird CTD software and calibration file. Post-processing at WHOI includes filtering extreme outliers, extrapolation of values from the top value collected at ~3-5m to the surface. Each cast is visually reviewed for reasonableness and density inversions (greater than 0.02 sigma-t) caused by spurious measurements. This process is facilitated by comparison of the outputs of the 2 temperature and conductivity sensors. Profile data are bin-averaged to 1 meter.; Uncertainty: 0.002; Quality flag convention: Data flags: 1 = not calibrated, 2 = good, 3 = questionable, 4 = bad, 5 = not reported, 6 = interpolated over > 2 dbar interval, 7 = despiked, 8 = not assigned for CTD data, 9 = not sampled; Researcher name: Leah McRaven; Researcher institution: WHOI Parameter or Variable: Salinity; Abbreviation: Salinity_PSS78; Observation type: Profile (discrete samples); Sampling instrument: Niskin bottle; Analyzing instrument: Guildline Salinometer model 8400 B; Detailed sampling and analyzing information: Water was collected in 200 ml glass bottles. The bottles were rinsed three times, and then filled to the neck. After the samples reached the lab temperature of approximately 20 ̊ C, they were analyzed for salinity using a Guildline Salinometer model 8400 B. The salinometer’s bath temperature was set to 21 ̊ C and was standardized before and after each run using IAPSO Standard Seawater (batch 171). Accuracies of salinity measurements were ±0.002 psu when a good standardization was achieved. Bottle salinities were assigned a quality control flag based upon the difference between CTD salinity (calibrated) at the same pressure and/or at the same potential temperature.; Uncertainty: 0.002; Quality flag convention: Data flags: 1 = not calibrated, 2 = good, 3 = questionable, 4 = bad, 5 = not reported, 6 = interpolated over > 2 dbar interval, 7 = despiked, 8 = not assigned for CTD data, 9 = not sampled; Researcher name: Leah McRaven; Researcher institution: WHOI Parameter or Variable: CTD Oxygen; Abbreviation: CTDOXY; Unit: umol kg-1; Observation type: Profile (CTD continuous); Sampling instrument: CTD (conductivity, temperature and depth); Detailed sampling and analyzing information: In situ data was collected from a profiling CTD 911 paied with a SBE 43 to collect dissolved oxygen data. Data were originally processed to filter out extreme outliers and reviewed for reasonableness, along with other profile data.; Uncertainty: 1 umol kg-1; Quality flag convention: Data flags: 1 = not calibrated, 2 = good, 3 = questionable, 4 = bad, 5 = not reported, 6 = interpolated over > 2 dbar interval, 7 = despiked, 8 = not assigned for CTD data, 9 = not sampled; Researcher name: Leah McRaven; Researcher institution: WHOI Parameter or Variable: Dissolved oxygen (DO); Abbreviation: Oxygen; Unit: umol kg-1; Observation type: Profile (discrete samples); Measured or calculated: Measured; Sampling instrument: Niskin bottle; Detailed sampling and analyzing information: To calibrate O2 sensor data, we collected bottle samples for dissolved O2 concentration from the surface underway (n=35) and select CTD casts (n=62). These samples were analyzed onboard using automated amperometric titration.; Uncertainty: 1 umol kg-1; Quality flag convention: Data flags: 1 = not calibrated, 2 = good, 3 = questionable, 4 = bad, 5 = not reported, 6 = interpolated over > 2 dbar interval, 7 = despiked, 8 = not assigned for CTD data, 9 = not sampled; Researcher name: Laurie Juranek; Researcher institution: OSU Parameter or Variable: Silicate; Abbreviation: Silicate; Unit: umol kg-1; Observation type: Profile (discrete samples); Sampling instrument: Niskin bottle; Analyzing instrument: Seal Analytical continuous-flow AutoAnalyzer 3 (AA3); Detailed sampling and analyzing information: Nutrient analyses (phosphate, silicate, nitrate+nitrite, and nitrite) were performed on a Seal Analytical continuous-flow AutoAnalyzer 3 (AA3). The methods used are described by Gordon et al [Gordon1992]_ Hager et al. [Hager1972]_, and Atlas et al. [Atlas1971]_. Details of modification of analytical methods used in this cruise are also compatible with the methods described in the nutrient section of the updated GO-SHIP repeat hydrography manual (Becker et al., 2019, [Becker 2019]_. Silicate was analyzed using the basic method of Armstrong et al. (1967). Acidified ammonium molybdate was added to a seawater sample to produce silicomolybdic acid which was then reduced to silicomolybdous acid (a blue compound) following the addition of stannous chloride. The sample was passed through a 10mm flowcell and measured at 660nm. Sampling Nutrient samples were drawn into 30 ml polypropylene screw-capped centrifuge tubes. The tubes and caps were cleaned with 10% HCl and rinsed 2-3 times with sample before filling. Samples were analyzed within 16 hours after sample collection, allowing sufficient time for all samples to reach room temperature. The centrifuge tubes fit directly onto the sampler. Data Collection and Processing Data collection and processing was done with the software provided with the instrument from Seal Analytical (AACE). After each run, the charts were reviewed for any problems during the run, any blank was subtracted, and final concentrations (micro moles/liter) were calculated, based on a linear curve fit. Once the run was reviewed and concentrations calculated a text file was created. That text file was reviewed for possible problems and then converted to another text file with only sample identifiers and nutrient concentrations that was merged with other bottle data.; Quality flag convention: Data flags: 1 = not calibrated, 2 = good, 3 = questionable, 4 = bad, 5 = not reported, 6 = interpolated over > 2 dbar interval, 7 = despiked, 8 = not assigned for CTD data, 9 = not sampled; Method reference: Becker, S., Aoyama M., Woodward M., Baaker, K., Covery, S., Mahaffey, C., Tanhua, T., "GO-SHIP Repeat Hydrography Nutrient Manual, 2019: The Precise and accurate determination of dissololved inorganic nutrients in seawater;Continuos Flow Analysis methods. Ocean Best Practices, August 2019: https://doi.org/10.25607/OBP-555; Researcher name: Susan Becker; Researcher institution: UCSD Parameter or Variable: Phosphate (PO4 3-); Abbreviation: Phosphate; Unit: umol kg-1; Observation type: Profile (discrete samples); Measured or calculated: Measured; Sampling instrument: Niskin bottle; Analyzing instrument: Seal Analytical continuous-flow AutoAnalyzer 3 (AA3); Detailed sampling and analyzing information: Nutrient analyses (phosphate, silicate, nitrate+nitrite, and nitrite) were performed on a Seal Analytical continuous-flow AutoAnalyzer 3 (AA3). The methods used are described by Gordon et al [Gordon1992]_ Hager et al. [Hager1972]_, and Atlas et al. [Atlas1971]_. Details of modification of analytical methods used in this cruise are also compatible with the methods described in the nutrient section of the updated GO-SHIP repeat hydrography manual (Becker et al., 2019, [Becker 2019]_. Phosphate Analysis Ortho-Phosphate was analyzed using a modification of the Bernhardt and Wilhelms (1967) [Bernhardt1967]_ method. Acidified ammonium molybdate was added to a seawater sample to produce phosphomolybdic acid, which was then reduced to phosphomolybdous acid (a blue compound) following the addition of dihydrazine sulfate. The sample was passed through a 10mm flowcell and absorbance measured at 820nm. Sampling Nutrient samples were drawn into 30 ml polypropylene screw-capped centrifuge tubes. The tubes and caps were cleaned with 10% HCl and rinsed 2-3 times with sample before filling. Samples were analyzed within 16 hours after sample collection, allowing sufficient time for all samples to reach room temperature. The centrifuge tubes fit directly onto the sampler. Data Collection and Processing Data collection and processing was done with the software provided with the instrument from Seal Analytical (AACE). After each run, the charts were reviewed for any problems during the run, any blank was subtracted, and final concentrations (micro moles/liter) were calculated, based on a linear curve fit. Once the run was reviewed and concentrations calculated a text file was created. That text file was reviewed for possible problems and then converted to another text file with only sample identifiers and nutrient concentrations that was merged with other bottle data.; Quality flag convention: Data flags: 1 = not calibrated, 2 = good, 3 = questionable, 4 = bad, 5 = not reported, 6 = interpolated over > 2 dbar interval, 7 = despiked, 8 = not assigned for CTD data, 9 = not sampled; Method reference: Becker, S., Aoyama M., Woodward M., Baaker, K., Covery, S., Mahaffey, C., Tanhua, T., "GO-SHIP Repeat Hydrography Nutrient Manual, 2019: The Precise and accurate determination of dissololved inorganic nutrients in seawater;Continuos Flow Analysis methods. Ocean Best Practices, August 2019: https://doi.org/10.25607/OBP-555; Researcher name: Susan Becker; Researcher institution: UCSD Parameter or Variable: Nitrate (NO3-); Abbreviation: Nitrate; Unit: umol kg-1; Observation type: Profile (discrete samples); Measured or calculated: Measured; Sampling instrument: Niskin bottle; Analyzing instrument: Seal Analytical continuous-flow AutoAnalyzer 3 (AA3); Detailed sampling and analyzing information: Nutrient analyses (phosphate, silicate, nitrate+nitrite, and nitrite) were performed on a Seal Analytical continuous-flow AutoAnalyzer 3 (AA3). The methods used are described by Gordon et al [Gordon1992]_ Hager et al. [Hager1972]_, and Atlas et al. [Atlas1971]_. Details of modification of analytical methods used in this cruise are also compatible with the methods described in the nutrient section of the updated GO-SHIP repeat hydrography manual (Becker et al., 2019, [Becker 2019]_. Nitrate/Nitrite Analysis A modification of the Armstrong et al. (1967) [Armstrong1967]_ procedure was used for the analysis of nitrate and nitrite. For nitrate analysis, a seawater sample was passed through a cadmium column where the nitrate was reduced to nitrite. This nitrite was then diazotized with sulfanilamide and coupled with N-(1-naphthyl)-ethylenediamine to form a red dye. The sample was then passed through a 10mm flowcell and absorbance measured at 520nm. The procedure was the same for the nitrite analysis but without the cadmium column. Sampling Nutrient samples were drawn into 30 ml polypropylene screw-capped centrifuge tubes. The tubes and caps were cleaned with 10% HCl and rinsed 2-3 times with sample before filling. Samples were analyzed within 16 hours after sample collection, allowing sufficient time for all samples to reach room temperature. The centrifuge tubes fit directly onto the sampler. Data Collection and Processing Data collection and processing was done with the software provided with the instrument from Seal Analytical (AACE). After each run, the charts were reviewed for any problems during the run, any blank was subtracted, and final concentrations (micro moles/liter) were calculated, based on a linear curve fit. Once the run was reviewed and concentrations calculated a text file was created. That text file was reviewed for possible problems and then converted to another text file with only sample identifiers and nutrient concentrations that was merged with other bottle data.; Quality flag convention: Data flags: 1 = not calibrated, 2 = good, 3 = questionable, 4 = bad, 5 = not reported, 6 = interpolated over > 2 dbar interval, 7 = despiked, 8 = not assigned for CTD data, 9 = not sampled; Method reference: Becker, S., Aoyama M., Woodward M., Baaker, K., Covery, S., Mahaffey, C., Tanhua, T., "GO-SHIP Repeat Hydrography Nutrient Manual, 2019: The Precise and accurate determination of dissololved inorganic nutrients in seawater;Continuos Flow Analysis methods. Ocean Best Practices, August 2019: https://doi.org/10.25607/OBP-555; Researcher name: Susan Becker; Researcher institution: UCSD Parameter or Variable: Nitrite (NO2-); Abbreviation: Nitrite; Unit: umol kg-1; Observation type: Profile (discrete samples); Measured or calculated: Measured; Sampling instrument: Niskin bottle; Analyzing instrument: Seal Analytical continuous-flow AutoAnalyzer 3 (AA3); Detailed sampling and analyzing information: Nutrient analyses (phosphate, silicate, nitrate+nitrite, and nitrite) were performed on a Seal Analytical continuous-flow AutoAnalyzer 3 (AA3). The methods used are described by Gordon et al [Gordon1992]_ Hager et al. [Hager1972]_, and Atlas et al. [Atlas1971]_. Details of modification of analytical methods used in this cruise are also compatible with the methods described in the nutrient section of the updated GO-SHIP repeat hydrography manual (Becker et al., 2019, [Becker 2019]_. Nitrate/Nitrite Analysis A modification of the Armstrong et al. (1967) [Armstrong1967]_ procedure was used for the analysis of nitrate and nitrite. For nitrate analysis, a seawater sample was passed through a cadmium column where the nitrate was reduced to nitrite. This nitrite was then diazotized with sulfanilamide and coupled with N-(1-naphthyl)-ethylenediamine to form a red dye. The sample was then passed through a 10mm flowcell and absorbance measured at 520nm. The procedure was the same for the nitrite analysis but without the cadmium column. Sampling Nutrient samples were drawn into 30 ml polypropylene screw-capped centrifuge tubes. The tubes and caps were cleaned with 10% HCl and rinsed 2-3 times with sample before filling. Samples were analyzed within 16 hours after sample collection, allowing sufficient time for all samples to reach room temperature. The centrifuge tubes fit directly onto the sampler. Data Collection and Processing Data collection and processing was done with the software provided with the instrument from Seal Analytical (AACE). After each run, the charts were reviewed for any problems during the run, any blank was subtracted, and final concentrations (micro moles/liter) were calculated, based on a linear curve fit. Once the run was reviewed and concentrations calculated a text file was created. That text file was reviewed for possible problems and then converted to another text file with only sample identifiers and nutrient concentrations that was merged with other bottle data.; Method reference: Becker, S., Aoyama M., Woodward M., Baaker, K., Covery, S., Mahaffey, C., Tanhua, T., "GO-SHIP Repeat Hydrography Nutrient Manual, 2019: The Precise and accurate determination of dissololved inorganic nutrients in seawater;Continuos Flow Analysis methods. Ocean Best Practices, August 2019: https://doi.org/10.25607/OBP-555 asNeeded Metadata are developed, maintained and distributed by NCEI. Updates are performed as needed to maintain currentness. NOAA National Centers for Environmental Information custodian bottle bottle any type of water bottle sampling device Generic name for water collection device; usually used to determine temperature, salinity and provide water aliquots for measurement of a wide range of parameters; often referred to by a specific type of water sampling bottle, such as a Nansen or Niskin bottle. carbon dioxide (CO2) gas analyzer carbon dioxide (CO2) gas analyzer measures gaseous carbon dioxide Carbon dioxide gas analyzer has often been referred to as LI-COR, because a lot of researchers choose to use products manufactured by LI-COR incorporation for their carbon dioxide measurement. The main component of a carbon dioxide analyzer is a nondispersive infrared (NDIR) spectroscopic sensors to detect CO2 in a gaseous environment by its characteristic absorption. Carbon dioxide (CO2) gas analyzer works together with carbon dioxide (CO2) equilibrator (insttypes_id 184) to measure carbon dioxide in the water. To measure water carbon dioxide, water needs to be continuously supplied to a showerhead inside an equilibrator. As the water flows through the equilibrator chamber, dissolved carbon dioxide exchanges quickly with air in the headspace. This air is then sampled by the carbon dioxide analyzer to determine the mole fraction of CO2 in water. CTD CTD Conductivity-Temperature-Depth probe titrator titrator titrator Sikuliaq ---journal entry dated 2024-04-2024--- The callsign changed from WDG7520 to WDN7246. An attribute change request was submitted to ICES on 2024-03-29. ---end of 2024-04-2024 journal entry--- ICES request for the vessel Sikuliaq from UNITED STATES. Name : Sikuliaq Flag : UNITED STATES - US (ISO Country Code) Call Sign : WDG7520 Platform Class : 31 Research vessel IMO : 9578945 Commissioned Date : 2013-03-29 Current Length : 80 Built : 2011-04-11 Notes : Owner U.S. National Science Foundation, Operator University of Alaska Fairbanks,Ice-Capable Additional Information Sources: - http://www.sfos.uaf.edu/sikuliaq/ Confirmed by NOAA on 2013-07-26.