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The fraction of water last ventilated in a given region in a time less than or equal to 160 years ago based on samples collected from R/V Knorr cruises KN199-04 and KN204-01 during 2010-2011 (NCEI Accession 0291536)


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            title:  The fraction of water last ventilated in a given region in a time less than or equal to 160 years ago based on samples collected from R/V Knorr cruises KN199-04 and KN204-01 during 2010-2011 (NCEI Accession 0291536)
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                date:  2024-04-21
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                  Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/institution/details/1416 Biological and Chemical Oceanography Data Management Office (BCO-DMO)
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                  Anchor:  http://lod.bco-dmo.org/id/person/51554 William M. Smethie Jr.
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                  Anchor:  https://www.ncei.noaa.gov/archive/archive-management-system/OAS/bin/prd/jquery/institution/details/985 Columbia University; Lamont-Doherty Earth Observatory (LDEO)
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                  Anchor:  http://lod.bco-dmo.org/id/person/810670 Mark Holzer
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                  Anchor:  http://lod.bco-dmo.org/id/person/810671 Yu-Heng Ting
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                  Anchor:  http://lod.bco-dmo.org/id/person/51554 Smethie Jr., William M.
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        abstract:  This dataset contains data collected on R/V Knorr during cruises KN199-04 and KN204-01 in the North Atlantic Ocean from 2010-10-16 to 2011-12-10. These data include depth. These data were collected by William M. Smethie Jr. of Lamont-Doherty Earth Observatory and Mark Holzer and Yu-Heng Ting of University of New South Wales as part of the "Collaborative Research: Completing a 10-Year Record of Deep Western Boundary Current Observations at Line W; A Contribution to the Atlantic Meridional Overturning Circulation Study (DWBC Obs Line W)", "RAPID: Continuation of U.S. GEOTRACES North Atlantic Section: CFC and SF6 Measurements (GT NAT RAPID CFC SF6)", "U.S. GEOTRACES North Atlantic Section: CFC and SF6 Measurements (GT NAT CFC and SF6)", and "U.S. GEOTRACES North Atlantic Transect (U.S. GEOTRACES NAT)" projects and "U.S. GEOTRACES (U.S. GEOTRACES)" program. The Biological and Chemical Oceanography Data Management Office (BCO-DMO) submitted these data to NCEI on 2020-05-27. The following is the text of the dataset description provided by BCO-DMO: The fraction of water last ventilated in a given region in a time less than or equal to 160 years ago Dataset Description: Water mass fractions and ages calculated from hydrographic and tracer data using a maximum-entropy inversion technique. This dataset contains the fraction of water last ventilated in a given region in a time less than or equal to 160 years ago as well as the corresponding ensemble standard deviations. Data File Formats: For a .csv or .tsv format of these data, use the "Get Data" button at the top of the BCO-DMO metadata page. For a Matlab file containing all of the water mass fraction data from this project, see the "Data Files" section of the BCO-DMO metadata page.
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          Anchor:  https://www.nsf.gov/awardsearch/showAward?AWD_ID=0928612 Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-0928612 Award URL: http://www.nsf.gov/awardsearch/showAward.do?AwardNumber=0928612
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          Anchor:  https://www.nsf.gov/awardsearch/showAward?AWD_ID=1332834 Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-1332834 Award URL: http://www.nsf.gov/awardsearch/showAward.do?AwardNumber=1332834
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                title:  Smethie Jr., W. M., Holzer, M., Ting, Y. (2020) The fraction of water last ventilated in a given region in a time less than or equal to 160 years ago based on samples collected from R/V Knorr cruises KN199-04 and KN204-01 during 2010-2011. Biological and Chemical Oceanography Data Management Office (BCO-DMO). Dataset version 2020-05-07. https://doi.org/10.26008/1912/bco-dmo.810784.1
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        supplementalInformation:  Acquisition Description: A maximum-entropy inversion technique was applied to CFC and SF6 measurements made on the U.S. GEOTRACES North Atlantic Transect, and radiocarbon concentrations interpolated to sample locations along the transact from gridded data reported in the GLODAP data compilation, to determine mean ages and source water compositions of each water sample. Details are described in Holzer et al. (2018). See the attached README file (GA03_transit-time_partitioned_water-mass_fractions_v2_README.pdf) for more information on methods and a map of region locations.
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                description:  NCEI Accession 0291536 v1.1 was published.
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        contact:  (CI_ResponsibleParty)
            organisationName:  NOAA National Centers for Environmental Information
            role:  (CI_RoleCode) custodian
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    acquisitionInformation:  (MI_AcquisitionInformation)
        platform:  (MI_Platform)
            identifier:  (MD_Identifier)
                code:  R/V Knorr
            description:  Title: R/V Flag: United States of America Vessel Type: Research Vessel (Oceanographic) DOB: 1970 IMO: 7738618 MMSI: 367246000
            instrument: (missing)