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Marine carbonate system discrete profile data from the Gulf of Alaska (GAK) Seward Line cruises between 2008 and 2017 (NCEI Accession 0277034)

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This dataset includes chemical data from discrete samples and accompanying physical data from a profiling CTD collected along the GAK Seward Line cruises in the Gulf of Alaska from 2008 to 2017. These data include water temperature, salinity, dissolved oxygen, dissolved inorganic carbon (DIC), total alkalinity (TA), and nutrients (nitrate, nitrite, phosphate, and silicate). The cruise was funded by the North Pacific Research Board (NPRB), the National Oceanic and Atmospheric Administration (NOAA), the Alaska Ocean Observing System (AOOS), and the Exxon Valdez Oil Spill Trustee Council (EVOSTC). The carbon data were collected and analyzed by personnel at the Ocean Acidification Research Center (OARC) at the University of Alaska Fairbanks (UAF). The CTD operations on the cruise were managed by personnel from the College of Fisheries and Ocean Sciences (CFOS) at UAF. The nutrient data were analyzed by personnel from the CFOS at UAF or the Pacific Marine Environmental Laboratory (PMEL). Cruises were biannual and titled with the ship code (i.e., TX), the season (S = Spring and F = Fall), and the year (i.e., 08-17).
  • Cite as: Monacci, Natalie M.; Cross, Jessica N.; Danielson, Seth L.; Evans, Wiley; Hopcroft, Russell R.; Mathis, Jeremy T.; Mordy, Calvin; Naber, Daniel; Shake, Kristen L.; Trahanovsky, Katherine; Wang, Hongjie; Weingartner, Thomas J.; Whitledge, Terry E. (2023). Marine carbonate system discrete profile data from the Gulf of Alaska (GAK) Seward Line cruises between 2008 and 2017 (NCEI Accession 0277034). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.25921/x9sg-9b08. Accessed [date].
gov.noaa.nodc:0277034
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Distributor NOAA National Centers for Environmental Information
+1-301-713-3277
NCEI.Info@noaa.gov
Dataset Point of Contact NOAA National Centers for Environmental Information
ncei.info@noaa.gov
Time Period 2008-05-02 to 2017-09-22
Spatial Bounding Box Coordinates
West: -149.62
East: -147.35
South: 57.7765
North: 60.027
Spatial Coverage Map
General Documentation
Associated Resources
Publication Dates
  • publication: 2023-03-17
  • revision: 2023-11-17
Data Presentation Form Digital table - digital representation of facts or figures systematically displayed, especially in columns
Dataset Progress Status Complete - production of the data has been completed
Historical archive - data has been stored in an offline storage facility
Data Update Frequency As needed
Purpose The Seward Line is a long-term observation program (LTOP) undertaken from 1998-2004 by the Northeast Pacific GLOBEC program, and continued from 2005-2009 by the North Pacific Research Board. Research cruises during 2008-2017 were funded by a consortium of NPRB, NOAA, AOOS, and EVOSTC. The purpose of this research is to develop an understanding of the response of this marine ecosystem to climate variability. Cruises are conducted each spring (May) and fall (September) along the Seward Line in the Northern Gulf of Alaska (GOA) and the western region of Prince William Sound. The Ocean Acidification Research Center (OARC) at the University of Alaska Fairbanks (UAF) joined the project from 2008 to 2017 to add carbon analyses to the Seward Line LTOP. Understanding carbon dynamics will add to our knowledge of seasonal and inter-annual variability to determine the intensity, duration, and extent of ocean acidification (OA) events in the northern GOA. Coastal regions around Alaska are experiencing the most rapid onset of OA compared to other U.S. regions. Recent research using OA forecast models, as well as species and human impact assessments, have shown that Alaska's coastal communities and fisheries have a varying degree of vulnerability to OA. This dataset provides a much needed time series to understand decadal variability of OA in Alaska's coastal areas.
Use Limitations
  • accessLevel: Public
  • 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.
Dataset Citation
  • Cite as: Monacci, Natalie M.; Cross, Jessica N.; Danielson, Seth L.; Evans, Wiley; Hopcroft, Russell R.; Mathis, Jeremy T.; Mordy, Calvin; Naber, Daniel; Shake, Kristen L.; Trahanovsky, Katherine; Wang, Hongjie; Weingartner, Thomas J.; Whitledge, Terry E. (2023). Marine carbonate system discrete profile data from the Gulf of Alaska (GAK) Seward Line cruises between 2008 and 2017 (NCEI Accession 0277034). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.25921/x9sg-9b08. Accessed [date].
Cited Authors
Principal Investigators
Contributors
Resource Providers
Publishers
Acknowledgments
  • Funding Information: North Pacific Research Board (Ocean Acidification - Seward Line)
Theme keywords NODC DATA TYPES THESAURUS NODC OBSERVATION TYPES THESAURUS WMO_CategoryCode
  • oceanography
Global Change Master Directory (GCMD) Science Keywords OCADS Study Type
  • Discrete measurement
  • Profile
Provider Keywords
  • Seward Line
Provider Variable Abbreviations
  • CTDOXY
  • CTDSAL_PSS78
  • CTDTMP_ITS90
  • DELO18
  • DIC
  • NITRATE
  • NITRITE
  • OXYGEN
  • PHOSPHATE
  • SILICATE
  • TA
Data Center keywords NODC COLLECTING INSTITUTION NAMES THESAURUS NODC SUBMITTING INSTITUTION NAMES THESAURUS Global Change Master Directory (GCMD) Data Center Keywords
Platform keywords NODC PLATFORM NAMES THESAURUS Global Change Master Directory (GCMD) Platform Keywords ICES/SeaDataNet Ship Codes
Instrument keywords NODC INSTRUMENT TYPES THESAURUS Global Change Master Directory (GCMD) Instrument Keywords
Place keywords NODC SEA AREA NAMES THESAURUS Global Change Master Directory (GCMD) Location Keywords Provider Geographic Names
  • Gulf of Alaska
  • North Pacific Ocean
Project keywords NODC PROJECT NAMES THESAURUS Cruise ID
  • N2S10
  • TXF08
  • TXF09
  • TXF10
  • TXF11
  • TXF12
  • TXF13
  • TXF14
  • TXF15
  • TXF16
  • TXF17
  • TXS08
  • TXS09
  • TXS11
  • TXS12
  • TXS13
  • TXS14
  • TXS15
  • TXS16
  • TXS17
EXPOCODE
  • 32QO20100503
  • 33A020080502
  • 33A020080913
  • 33A020090503
  • 33A020090914
  • 33A020100914
  • 33A020110506
  • 33A020110915
  • 33A020120503
  • 33A020120913
  • 33A020130427
  • 33A020130914
  • 33A020140503
  • 33A020140913
  • 33A020150505
  • 33A020150914
  • 33A020160430
  • 33A020160915
  • 33A020170501
  • 33A020170916
Ocean Acidification Search Keywords
  • Ocean Carbon and Acidification Data System (OCADS) Project
Reference Section ID
  • Seward Line
Research Projects
  • GAK section line data on Seward Line Cruises from 2008 to 2017
Keywords NCEI ACCESSION NUMBER
Use Constraints
  • Cite as: Monacci, Natalie M.; Cross, Jessica N.; Danielson, Seth L.; Evans, Wiley; Hopcroft, Russell R.; Mathis, Jeremy T.; Mordy, Calvin; Naber, Daniel; Shake, Kristen L.; Trahanovsky, Katherine; Wang, Hongjie; Weingartner, Thomas J.; Whitledge, Terry E. (2023). Marine carbonate system discrete profile data from the Gulf of Alaska (GAK) Seward Line cruises between 2008 and 2017 (NCEI Accession 0277034). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.25921/x9sg-9b08. Accessed [date].
Access Constraints
  • 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.
Fees
  • 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.
Lineage information for: dataset
Processing Steps
  • 2023-03-17T20:32:36Z - NCEI Accession 0277034 v1.1 was published.
  • 2023-11-17T19:45:02Z - NCEI Accession 0277034 was revised and v2.2 was published.
    Rationale: 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.
Output Datasets
Lineage information for: dataset
Processing Steps
  • Parameter or Variable: Dissolved Inorganic Carbon; Abbreviation: DIC; Unit: umol kg-1; Observation type: Discrete sample; Measured or calculated: Measured; Sampling instrument: Discrete samples were drawn from a CTD Niskin; Analyzing instrument: Discrete samples were run on a VINDTA 3C; Detailed sampling and analyzing information: The Versatile INstrument for the Determination of Total inorganic and titration of Alkalinity (VINDTA) by Marianda paired with a Coulometer by UIC was used to conduct a coulomteric carbon dioxide titration with a carrier gas and 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: Dr. A. Dickson of Scripps Institution of Oceanography; CRM batch number: 88-173; Preservation method: Mercuric chloride; Preservative volume: 200 uL; Uncertainty: 3.10 umol kg-1; Quality flag convention: Flag assigned to the data quality: 1 = shipboard, 2 = good, 3 = questionable, 4 = bad, 6 = not reported, 9 = not collected; 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 Sea shelf, Biogeosciences, 7, 1769-1787, https://doi.org/10.5194/bg-7-1769-2010.; Researcher name: Natalie M. Monacci; Researcher institution: University of Alaska Fairbanks.
  • Parameter or Variable: Total alkalinity; Abbreviation: TA; Unit: UMOL/KG; Observation type: Discrete sample; Measured or calculated: Measured; Sampling instrument: Discrete samples were drawn from a CTD Niskin; Analyzing instrument: Discrete samples were run on a VINDTA 3C; 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 paired with a Coulometer by UIC was used to conduct a coulomteric carbon dioxide titration with a carrier gas and 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: Dr. A. Dickson of Scripps Institution of Oceanography; CRM batch number: 88-173; Preservation method: Mercuric chloride; Preservative volume: 200 uL; Uncertainty: 2.82 umol kg-1; Quality flag convention: Flag assigned to the data quality: 1 = shipboard, 2 = good, 3 = questionable, 4 = bad, 6 = not reported, 9 = not collected; 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 Sea shelf, Biogeosciences, 7, 1769-1787, https://doi.org/10.5194/bg-7-1769-2010.; Researcher name: Natalie M. Monacci; Researcher institution: University of Alaska Fairbanks.
  • Parameter or Variable: Temperature; Abbreviation: CTDTMP_ITS90; Unit: DEG C (ITS-90); Observation type: Measured; Analyzing instrument: Seabird CTD; 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 the University of Alaska Fairbanks 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: 0.001 DEG C; Quality flag convention: Flag assigned to the data quality: 1 = shipboard, 2 = good, 3 = questionable, 4 = bad, 6 = not reported, 9 = not collected; Researcher name: Seth Danielson/Thomas Weingartner; Researcher institution: University of Alaska Fairbanks.
  • Parameter or Variable: Salinity; Abbreviation: CTDSAL_PSS78; Unit: PSU (PSS-78); Observation type: Calculated; Analyzing instrument: Seabird CTD; 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 the University of Alaska Fairbanks 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: 0.003 PSU; Quality flag convention: Flag assigned to the data quality: 1 = shipboard, 2 = good, 3 = questionable, 4 = bad, 6 = not reported, 9 = not collected; Researcher name: Seth Danielson/Thomas Weingartner; Researcher institution: University of Alaska Fairbanks.
  • Parameter or Variable: CTD Dissolved Oxygen; Abbreviation: CTDOXY; Unit: UMOL/KG; Observation type: Measured; Analyzing instrument: SBE 43; Detailed sampling and analyzing information: A profiling CTD 911 was used to collect the conductivity, temperature, and depth data at each station. A SBE 43 sensor was plumbed in to the 911 to measure dissolved oxygen. Data are processed using Seabird CTD software and calibration file. Post-processing at the University of Alaska Fairbanks 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.; Uncertainty: 1 UMOL/KG; Quality flag convention: Flag assigned to the data quality: 1 = shipboard, 2 = good, 3 = questionable, 4 = bad, 6 = not reported, 9 = not collected; Researcher name: Russel Hopcroft/Natalie Monacci; Researcher institution: University of Alaska Fairbanks.
  • Parameter or Variable: Dissolved Oxygen; Abbreviation: OXYGEN; Unit: UMOL/KG; Observation type: Measured; Analyzing instrument: Langdon Amperometric Titrator; Uncertainty: 1 UMOL/KG; Quality flag convention: Flag assigned to the data quality: 1 = shipboard, 2 = good, 3 = questionable, 4 = bad, 6 = not reported, 9 = not collected; Researcher name: Natalie M. Monacci; Researcher institution: University of Alaska Fairbanks.
  • Parameter or Variable: Silicic acid; Abbreviation: SILICATE; Unit: UMOL/KG; Observation type: Measured; Sampling instrument: Discrete samples were drawn from a CTD Niskin; Analyzing instrument: Discrete samples were run on a continuous flow analyzer.; Detailed sampling and analyzing information: Samples were collected in 50 ml high-density polyethylene bottles that were rinsed first with 10% HCl prior to each station, and rinsed at least three times with sample before filling. Some samples were frozen after collection until just prior to analysis. Nutrient samples were analyzed according to the methods of Gordon, et al (1993). Ammonium was measured using an indophenol blue method modified from Mantoura and Woodward (1983).; Quality flag convention: Flag assigned to the data quality: 1 = shipboard, 2 = good, 3 = questionable, 4 = bad, 6 = not reported, 9 = not collected; Method reference: Gordon, I., Jennings, J.C., Ross, J.A., Krest, J. 1993. A Suggested Protocol for Continuous Flow Automated Analysis of Seawater Nutrients (Phosphate, Nitrate, Nitrite and Silicic Acid) in the WOCE Hydrographic Program and the Joint Global Ocean Fluxes Study. Methods Manual WHPO. 91-1. Mantoura, R.F.C., Woodward, E.M.S., 1983. Optimization of the indophenol blue method for the automated determination of ammonia in estuarine waters. Estuar. Coast. Shelf Sci. 17, 219–224.; Researcher name: Russel Hopcroft/Jeremy Mathis/Jessica Cross; Researcher institution: University of Alaska Fairbanks.
  • Parameter or Variable: Nitrate; Abbreviation: NITRATE; Unit: UMOL/KG; Observation type: Calculated; Sampling instrument: Discrete samples were drawn from a CTD Niskin; Analyzing instrument: Discrete samples were run on a continuous flow analyzer.; Detailed sampling and analyzing information: Samples were collected in 50 ml high-density polyethylene bottles that were rinsed first with 10% HCl prior to each station, and rinsed at least three times with sample before filling. Some samples were refrigerated for 3-12 hours prior to analysis. Nutrient samples were analyzed according to the methods of Gordon, et al (1993). Ammonium was measured using an indophenol blue method modified from Mantoura and Woodward (1983).; Quality flag convention: Flag assigned to the data quality: 1 = shipboard, 2 = good, 3 = questionable, 4 = bad, 6 = not reported, 9 = not collected; Method reference: Gordon, I., Jennings, J.C., Ross, J.A., Krest, J. 1993. A Suggested Protocol for Continuous Flow Automated Analysis of Seawater Nutrients (Phosphate, Nitrate, Nitrite and Silicic Acid) in the WOCE Hydrographic Program and the Joint Global Ocean Fluxes Study. Methods Manual WHPO. 91-1. Mantoura, R.F.C., Woodward, E.M.S., 1983. Optimization of the indophenol blue method for the automated determination of ammonia in estuarine waters. Estuar. Coast. Shelf Sci. 17, 219–224.; Researcher name: Russel Hopcroft/Jeremy Mathis/Jessica Cross; Researcher institution: University of Alaska Fairbanks.
  • Parameter or Variable: Nitrite; Abbreviation: NITRITE; Unit: UMOL/KG; Observation type: Measured; Sampling instrument: Discrete samples were drawn from a CTD Niskin; Analyzing instrument: Discrete samples were run on a continuous flow analyzer.; Detailed sampling and analyzing information: Samples were collected in 50 ml high-density polyethylene bottles that were rinsed first with 10% HCl prior to each station, and rinsed at least three times with sample before filling. Some samples were refrigerated for 3-12 hours prior to analysis. Nutrient samples were analyzed according to the methods of Gordon, et al (1993). Ammonium was measured using an indophenol blue method modified from Mantoura and Woodward (1983).; Quality flag convention: Flag assigned to the data quality: 1 = shipboard, 2 = good, 3 = questionable, 4 = bad, 6 = not reported, 9 = not collected; Method reference: Gordon, I., Jennings, J.C., Ross, J.A., Krest, J. 1993. A Suggested Protocol for Continuous Flow Automated Analysis of Seawater Nutrients (Phosphate, Nitrate, Nitrite and Silicic Acid) in the WOCE Hydrographic Program and the Joint Global Ocean Fluxes Study. Methods Manual WHPO. 91-1. Mantoura, R.F.C., Woodward, E.M.S., 1983. Optimization of the indophenol blue method for the automated determination of ammonia in estuarine waters. Estuar. Coast. Shelf Sci. 17, 219–224.; Researcher name: Russel Hopcroft/Jeremy Mathis/Jessica Cross; Researcher institution: University of Alaska Fairbanks.
  • Parameter or Variable: Phosphate; Abbreviation: PHOSPHATE; Unit: UMOL/KG; Observation type: Measured; Sampling instrument: Discrete samples were drawn from a CTD Niskin; Analyzing instrument: Discrete samples were run on a continuous flow analyzer.; Detailed sampling and analyzing information: Samples were collected in 50 ml high-density polyethylene bottles that were rinsed first with 10% HCl prior to each station, and rinsed at least three times with sample before filling. Some samples were refrigerated for 3-12 hours prior to analysis. Nutrient samples were analyzed according to the methods of Gordon, et al (1993). Ammonium was measured using an indophenol blue method modified from Mantoura and Woodward (1983).; Quality flag convention: Flag assigned to the data quality: 1 = shipboard, 2 = good, 3 = questionable, 4 = bad, 6 = not reported, 9 = not collected; Method reference: Gordon, I., Jennings, J.C., Ross, J.A., Krest, J. 1993. A Suggested Protocol for Continuous Flow Automated Analysis of Seawater Nutrients (Phosphate, Nitrate, Nitrite and Silicic Acid) in the WOCE Hydrographic Program and the Joint Global Ocean Fluxes Study. Methods Manual WHPO. 91-1. Mantoura, R.F.C., Woodward, E.M.S., 1983. Optimization of the indophenol blue method for the automated determination of ammonia in estuarine waters. Estuar. Coast. Shelf Sci. 17, 219–224.; Researcher name: Russel Hopcroft/Jeremy Mathis/Jessica Cross; Researcher institution: University of Alaska Fairbanks.
  • Parameter or Variable: Delta Oxygen 18; Abbreviation: DELO18; Unit: permil; Observation type: Measured; Sampling instrument: Discrete samples were drawn from a CTD Niskin; Detailed sampling and analyzing information: Samples were collected in borosilicate glass vials with no headspace, capped with a conical insert, wrapped in parafilm and sent to the Stable Isotope Lab at Oregon State University for analysis.; Quality flag convention: Flag assigned to the data quality: 1 = shipboard, 2 = good, 3 = questionable, 4 = bad, 6 = not reported, 9 = not collected; Researcher name: Jessica Cross/Jeremy Mathis/ Natalie Monacci; Researcher institution: University of Alaska Fairbanks .
Acquisition Information (collection)
Instrument
  • carbon dioxide (CO2) gas analyzer
  • CTD
  • Niskin bottle
  • nutrient autoanalyzer
  • oxygen sensor
  • temperature sensor
  • thermosalinograph
  • titrator
Platform
  • Norseman II
  • RV Tiglax
Last Modified: 2024-04-17T10:11:09Z
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