Discrete profile measurements of dissolved inorganic carbon (DIC), total alkalinity (TA), temperature, salinity, oxygen, nutrients and other parameters during the M/V Norseman II and M/V Tiglax Seward Line cruises N2S10 and TXF10 (EXPOCODEs: 32QO20100503 and 33A020100914) in the Gulf of Alaska, North Pacific Ocean from 2010-05-03 to 2010-09-18 (NCEI Accession 0210125)
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title: Discrete profile measurements of dissolved inorganic carbon (DIC), total alkalinity (TA), temperature, salinity, oxygen, nutrients and other parameters during the M/V Norseman II and M/V Tiglax Seward Line cruises N2S10 and TXF10 (EXPOCODEs: 32QO20100503 and 33A020100914) in the Gulf of Alaska, North Pacific Ocean from 2010-05-03 to 2010-09-18 (NCEI Accession 0210125)
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abstract: This dataset includes chemical data from discrete samples and accompanying physical data from a profiling CTD collected during the M/V Norseman II and M/V Tiglax Seward Line cruises N2S10 and TXF10 (EXPOCODEs: 32QO20100503 and 33A020100914) in the Gulf of Alaska, North Pacific Ocean from 2010-05-03 to 2010-09-18. These data include dissolved inorganic carbon (DIC), total alkalinity (TA), temperature, salinity, oxygen, nutrients (Nitrate, Nitrite, Phosphate, and Silicate) and other parameters. 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 the Whitledge Laboratory at CFOS-UAF. Data files are in .csv format and titled with the ship code (e.g., TX), the season (S = Spring and F = Fall), and the year (e.g., 08-17).
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.
credit: Funding Information: North Pacific Research Board (Ocean Acidification - Seward Line)
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keyword: North Pacific Ocean
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otherConstraints: Cite as: Monacci, Natalie M.; Cross, Jessica N.; Mathis, Jeremy T.; Hopcroft, Russell R.; Naber, Daniel; Shake, Kristen L.; Trahanovsky, Katherine; Whitledge, Terry E. (2020). Discrete profile measurements of dissolved inorganic carbon (DIC), total alkalinity (TA), temperature, salinity, oxygen, nutrients and other parameters during the M/V Norseman II and M/V Tiglax Seward Line cruises N2S10 and TXF10 (EXPOCODEs: 32QO20100503 and 33A020100914) in the Gulf of Alaska, North Pacific Ocean from 2010-05-03 to 2010-09-18 (NCEI Accession 0210125). [indicate subset used]. NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.25921/avxr-m571. Accessed [date].
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beginPosition: 2010-05-03
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description: 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: 4 umol kg-1; Quality flag convention: All data points are either accepted (retained) or rejected (deleted) during processing, so data are all defined as good.; 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.
processStep: (LE_ProcessStep)
description: 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: 4 umol kg-1; Quality flag convention: All data points are either accepted (retained) or rejected (deleted) during processing, so data are all defined as good.; 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.
processStep: (LE_ProcessStep)
description: Parameter or Variable: Temperature; Abbreviation: CTDTMP; 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: All data points are either accepted (retained) or rejected (deleted) during processing, so data are all defined as good.; Researcher name: Seth Danielson/Thomas Weingartner; Researcher institution: University of Alaska Fairbanks.
processStep: (LE_ProcessStep)
description: Parameter or Variable: Salinity; Abbreviation: CTDSAL; 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: All data points are either accepted (retained) or rejected (deleted) during processing, so data are all defined as good.; Researcher name: Seth Danielson/Thomas Weingartner; Researcher institution: University of Alaska Fairbanks.
processStep: (LE_ProcessStep)
description: 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: All data points are either accepted (retained) or rejected (deleted) during processing, so data are all defined as good.; Researcher name: Russel Hopcroft/Natalie Monacci; Researcher institution: University of Alaska Fairbanks.
processStep: (LE_ProcessStep)
description: 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: All data points are either accepted (retained) or rejected (deleted) during processing, so data are all defined as good.; Researcher name: Natalie Monacci; Researcher institution: University of Alaska Fairbanks.
processStep: (LE_ProcessStep)
description: 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: All data points are flagged (3) as questionable.; 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: Katherine Trahanovsky/Terry Whitledge; Researcher institution: University of Alaska Fairbanks.
processStep: (LE_ProcessStep)
description: 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: All data points are flagged (3) as questionable.; 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: Katherine Trahanovsky/Terry Whitledge; Researcher institution: University of Alaska Fairbanks.
processStep: (LE_ProcessStep)
description: 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: All data points are flagged (3) as questionable.; 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: Katherine Trahanovsky/Terry Whitledge; Researcher institution: University of Alaska Fairbanks.
processStep: (LE_ProcessStep)
description: 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: All data points are flagged (3) as questionable.; 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: Katherine Trahanovsky/Terry Whitledge; Researcher institution: University of Alaska Fairbanks.
processStep: (LE_ProcessStep)
description: Parameter or Variable: 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 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.; Quality flag convention: Flag assigned to the data quality: 2 = good, 3 = questionable, 4 = bad, 5 = not reported, 9 = not collected; Researcher name: Seth Danielson; Researcher institution: University of Alaska Fairbanks .
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metadataMaintenance: (MD_MaintenanceInformation)
maintenanceAndUpdateFrequency: (MD_MaintenanceFrequencyCode) asNeeded
maintenanceNote: Metadata are developed, maintained and distributed by NCEI. Updates are performed as needed to maintain currentness.
maintenanceNote: NCEI Accession 0210125 was revised and a new version of the archival package was published. Updates to existing archival packages may provide additional files or replace obsolete files. The latest version contains the most complete and up-to-date representation of this archival information package. All of the files received prior to this update are available in the preceding version of this accession. Please see journal.txt in the /about directory for additional details on changes made.
contact: (CI_ResponsibleParty)
organisationName: NOAA National Centers for Environmental Information
role: (CI_RoleCode) custodian
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acquisitionInformation: (MI_AcquisitionInformation)
instrument: (MI_Instrument)
identifier: (MD_Identifier)
code: carbon dioxide (CO2) gas analyzer
type: carbon dioxide (CO2) gas analyzer
description: 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.
instrument: (MI_Instrument)
identifier: (MD_Identifier)
code: CTD
type: CTD
description: Conductivity-Temperature-Depth probe
instrument: (MI_Instrument)
identifier: (MD_Identifier)
code: Niskin bottle
type: Niskin bottle
description: Device for obtaining samples of seawater at a specific depth Why special entry for Niskin bottle but no entry for Nansen bottle?
platform: (MI_Platform)
identifier: (MD_Identifier)
code: Norseman II
description: Updated information from ICES for the vessel NORSEMAN II from UNITED STATES. Name : NORSEMAN II Flag : UNITED STATES - US (ISO Country Code) Call Sign : WDD6688 Platform Class : 31 Research vessel IMO : 7908122 Commissioned Date : 2007 Current Length : 35 Built : 1978 Notes : MMSI 367176270. Additional Information Sources: - http://www.norsemanmaritime.com/our-ships.html - http://www.norsemanmaritime.com/uploads/2/8/7/4/28748569/norseman_ii_spec_sheet_new_112013.pdf - http://www.marinetraffic.com/pt/ais/details/ships/367176270/vessel:NORSEMAN_II - http://www.st.nmfs.noaa.gov/pls/webpls/cgv_pkg.vessel_id_list?vessel_id_in=601068 Submitted to ICES 2014-10-01. Confirmed by NOAA on 2015-02-03.
instrument: (missing)
platform: (MI_Platform)
identifier: (MD_Identifier)
code: RV Tiglax
description: Updated information from ICES for the vessel TIGLAX from US: UNITED STATES. Name : TIGLAX Country(s) : US: UNITED STATES (ISO Country Code) Platform Class : 31: Research vessel MMSI: 368926308 Title : RV Commissioned Date : 1987 Current Length : 37 Built : 1987 WOD Code: 11551 Notes : Operated by Alaska Maritime National Wildlife Refuge Information Sources: - https://www.fws.gov/refuge/Alaska_Maritime/what_we_do/mv_tiglax.html - https://absilcc.org/science/amnwr/Shared%20Documents/Tiglax%20Fact%20Sheet%202012.pdf - https://www.marinetraffic.com/en/ais/details/ships/shipid:5435530/mmsi:368926308/imo:0/vessel:TIGLAX Confirmed by NOAA on 2018-08-31 (FY2018). Submitted to ICES 2018-02-14
instrument: (missing)
