<DIF xmlns="http://gcmd.gsfc.nasa.gov/Aboutus/xml/dif/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://gcmd.gsfc.nasa.gov/Aboutus/xml/dif/ http://gcmd.gsfc.nasa.gov/Aboutus/xml/dif/dif_v9.8.4.xsd">
  <Entry_ID>noaa-ocean-14610</Entry_ID>
  <Entry_Title>Irish Sea 500 Year Arctica islandica Carbon Isotope and Chronology Record</Entry_Title>
  <Data_Set_Citation>
    <Dataset_Creator>Butler, P.G.; Scourse, J.D.; Richardson, C.A.; Wanamaker, A.D.; Bryant, C.L.; Bennell, J.D.</Dataset_Creator>
    <Dataset_Title>Irish Sea 500 Year Arctica islandica Carbon Isotope and Chronology Record</Dataset_Title>
    <Dataset_Release_Date>2013-06-24</Dataset_Release_Date>
    <Dataset_Publisher>NCDC-Paleoclimatology</Dataset_Publisher>
    <Data_Presentation_Form>ONLINE Files</Data_Presentation_Form>
    <Dataset_DOI>Pending</Dataset_DOI>
    <Online_Resource>https://www.ncdc.noaa.gov/paleo/study/14610</Online_Resource>
  </Data_Set_Citation>
  <Personnel>
    <Role>Investigator</Role>
    <First_Name>P.G.</First_Name>
    <Last_Name>Butler</Last_Name>
  </Personnel>
  <Personnel>
    <Role>Investigator</Role>
    <First_Name>J.D.</First_Name>
    <Last_Name>Scourse</Last_Name>
  </Personnel>
  <Personnel>
    <Role>Investigator</Role>
    <First_Name>C.A.</First_Name>
    <Last_Name>Richardson</Last_Name>
  </Personnel>
  <Personnel>
    <Role>Investigator</Role>
    <First_Name>A.D.</First_Name>
    <Last_Name>Wanamaker</Last_Name>
  </Personnel>
  <Personnel>
    <Role>Investigator</Role>
    <First_Name>C.L.</First_Name>
    <Last_Name>Bryant</Last_Name>
  </Personnel>
  <Personnel>
    <Role>Investigator</Role>
    <First_Name>J.D.</First_Name>
    <Last_Name>Bennell</Last_Name>
  </Personnel>
  <Parameters>
    <Category>earth science</Category>
    <Topic>paleoclimate</Topic>
    <Term>paleoceanography</Term>
    <Detailed_Variable>growth rate,bivalve,null,dimensionless,null,paleoceanography,detrended|normalized,null,N,Arctica islandica produced from series which have had all autocorrelation removed using ARSTAN</Detailed_Variable>
  </Parameters>
  <Parameters>
    <Category>earth science</Category>
    <Topic>paleoclimate</Topic>
    <Term>paleoceanography</Term>
    <Detailed_Variable>notes,null,null,null,null,paleoceanography,null,null,C,null</Detailed_Variable>
  </Parameters>
  <Parameters>
    <Category>earth science</Category>
    <Topic>paleoclimate</Topic>
    <Term>paleoceanography</Term>
    <Detailed_Variable>growth rate,bivalve,null,dimensionless,null,paleoceanography,detrended|normalized,null,N,Arctica islandica; includes only that autocorrelation which is common to multiple series using ARSTAN</Detailed_Variable>
  </Parameters>
  <Parameters>
    <Category>earth science</Category>
    <Topic>paleoclimate</Topic>
    <Term>paleoceanography</Term>
    <Detailed_Variable>delta 13C,bivalve,null,per mil PDB,null,paleoceanography,null,isotope ratio mass spectrometry,N,Arctica islandica reanalysis</Detailed_Variable>
  </Parameters>
  <Parameters>
    <Category>earth science</Category>
    <Topic>paleoclimate</Topic>
    <Term>paleoceanography</Term>
    <Detailed_Variable>reflectance,sediment,null,watt per steradian,null,paleoceanography,null,null,N,at 640 nm</Detailed_Variable>
  </Parameters>
  <Parameters>
    <Category>earth science</Category>
    <Topic>paleoclimate</Topic>
    <Term>paleoceanography</Term>
    <Detailed_Variable>age,null,one standard deviation,calendar kiloyear before present,null,paleoceanography,null,null,N,using INTCAL04</Detailed_Variable>
  </Parameters>
  <Parameters>
    <Category>earth science</Category>
    <Topic>paleoclimate</Topic>
    <Term>paleoceanography</Term>
    <Detailed_Variable>age,null,one standard deviation,calendar kiloyear before present,null,paleoceanography,null,null,N,using MARINE04</Detailed_Variable>
  </Parameters>
  <Parameters>
    <Category>earth science</Category>
    <Topic>paleoclimate</Topic>
    <Term>paleoceanography</Term>
    <Detailed_Variable>age,null,null,radiocarbon year before present,null,paleoceanography,corrected,null,N,corrected using delta R value</Detailed_Variable>
  </Parameters>
  <Parameters>
    <Category>earth science</Category>
    <Topic>paleoclimate</Topic>
    <Term>paleoceanography</Term>
    <Detailed_Variable>age,null,null,year Common Era,null,paleoceanography,corrected,null,N,year of death minus 20 years</Detailed_Variable>
  </Parameters>
  <Parameters>
    <Category>earth science</Category>
    <Topic>paleoclimate</Topic>
    <Term>paleoceanography</Term>
    <Detailed_Variable>delta 13C,bivalve,one standard deviation,per mil PDB,null,paleoceanography,null,isotope ratio mass spectrometry,N,Arctica islandica</Detailed_Variable>
  </Parameters>
  <Parameters>
    <Category>earth science</Category>
    <Topic>paleoclimate</Topic>
    <Term>paleoceanography</Term>
    <Detailed_Variable>age,null,null,calendar kiloyear before present,null,paleoceanography,null,null,N,dated using INTCAL04</Detailed_Variable>
  </Parameters>
  <Parameters>
    <Category>earth science</Category>
    <Topic>paleoclimate</Topic>
    <Term>paleoceanography</Term>
    <Detailed_Variable>age,null,null,calendar kiloyear before present,null,paleoceanography,null,null,N,dated using MARINE04</Detailed_Variable>
  </Parameters>
  <Parameters>
    <Category>earth science</Category>
    <Topic>paleoclimate</Topic>
    <Term>paleoceanography</Term>
    <Detailed_Variable>age,null,null,radiocarbon year before present,null,paleoceanography,averaged,null,N,global average reservoir age</Detailed_Variable>
  </Parameters>
  <Parameters>
    <Category>earth science</Category>
    <Topic>paleoclimate</Topic>
    <Term>paleoceanography</Term>
    <Detailed_Variable>sample identification,null,null,null,null,paleoceanography,null,null,C,null</Detailed_Variable>
  </Parameters>
  <Parameters>
    <Category>earth science</Category>
    <Topic>paleoclimate</Topic>
    <Term>paleoceanography</Term>
    <Detailed_Variable>delta 13C,bivalve,null,per mil PDB,null,paleoceanography,null,isotope ratio mass spectrometry,N,Arctica islandica 2nd reanalysis</Detailed_Variable>
  </Parameters>
  <Parameters>
    <Category>earth science</Category>
    <Topic>paleoclimate</Topic>
    <Term>paleoceanography</Term>
    <Detailed_Variable>age,null,null,year Common Era,null,paleoceanography,null,null,N,Sample year of birth</Detailed_Variable>
  </Parameters>
  <Parameters>
    <Category>earth science</Category>
    <Topic>paleoclimate</Topic>
    <Term>paleoceanography</Term>
    <Detailed_Variable>age,null,null,year Common Era,null,paleoceanography,null,null,N,Sample year of death</Detailed_Variable>
  </Parameters>
  <Parameters>
    <Category>earth science</Category>
    <Topic>paleoclimate</Topic>
    <Term>paleoceanography</Term>
    <Detailed_Variable>age,null,null,calendar kiloyear before present,null,paleoceanography,null,null,N,relative [1950 - Sclero Year of Death + 20]</Detailed_Variable>
  </Parameters>
  <Parameters>
    <Category>earth science</Category>
    <Topic>paleoclimate</Topic>
    <Term>paleoceanography</Term>
    <Detailed_Variable>growth rate,bivalve,null,dimensionless,null,paleoceanography,detrended|normalized,null,N,Arctica islandica; produced from series which have had all autocorrelation removed using ARSTAN</Detailed_Variable>
  </Parameters>
  <Parameters>
    <Category>earth science</Category>
    <Topic>paleoclimate</Topic>
    <Term>paleoceanography</Term>
    <Detailed_Variable>age,null,null,radiocarbon year before present,null,paleoceanography,null,null,N,local reservoir age</Detailed_Variable>
  </Parameters>
  <Parameters>
    <Category>earth science</Category>
    <Topic>paleoclimate</Topic>
    <Term>paleoceanography</Term>
    <Detailed_Variable>age,bivalve,null,year Common Era,null,paleoceanography,corrected,null,N,Arctica islandica year of death minus 20 years</Detailed_Variable>
  </Parameters>
  <Parameters>
    <Category>earth science</Category>
    <Topic>paleoclimate</Topic>
    <Term>paleoceanography</Term>
    <Detailed_Variable>growth rate,bivalve,null,dimensionless,null,paleoceanography,detrended|normalized,null,N,Arctica islandica; retains all the persistence from the individual series using ARSTAN</Detailed_Variable>
  </Parameters>
  <Parameters>
    <Category>earth science</Category>
    <Topic>paleoclimate</Topic>
    <Term>paleoceanography</Term>
    <Detailed_Variable>growth rate,bivalve,null,dimensionless,null,paleoceanography,detrended|normalized,null,N,Arctica islandica; RCS.ars; includes only that autocorrelation which is common to multiple series using ARSTAN</Detailed_Variable>
  </Parameters>
  <Parameters>
    <Category>earth science</Category>
    <Topic>paleoclimate</Topic>
    <Term>paleoceanography</Term>
    <Detailed_Variable>age,bivalve,null,year Common Era,null,paleoceanography,null,null,N,Arctica islandica year of death</Detailed_Variable>
  </Parameters>
  <Parameters>
    <Category>earth science</Category>
    <Topic>paleoclimate</Topic>
    <Term>paleoceanography</Term>
    <Detailed_Variable>delta 13C,bivalve,null,per mil PDB,null,paleoceanography,null,isotope ratio mass spectrometry,N,Arctica islandica</Detailed_Variable>
  </Parameters>
  <Parameters>
    <Category>earth science</Category>
    <Topic>paleoclimate</Topic>
    <Term>paleoceanography</Term>
    <Detailed_Variable>age,null,null,year Common Era,null,paleoceanography,null,null,N,null</Detailed_Variable>
  </Parameters>
  <Parameters>
    <Category>earth science</Category>
    <Topic>paleoclimate</Topic>
    <Term>paleoceanography</Term>
    <Detailed_Variable>delta 13C,bivalve,null,per mil PDB,null,paleoceanography,averaged,isotope ratio mass spectrometry,N,Arctica islandica</Detailed_Variable>
  </Parameters>
  <Parameters>
    <Category>earth science</Category>
    <Topic>paleoclimate</Topic>
    <Term>paleoceanography</Term>
    <Detailed_Variable>age,null,null,calendar kiloyear before present,null,paleoceanography,null,null,N,uncalibrated</Detailed_Variable>
  </Parameters>
  <Parameters>
    <Category>earth science</Category>
    <Topic>paleoclimate</Topic>
    <Term>paleoceanography</Term>
    <Detailed_Variable>age,null,one standard deviation,calendar kiloyear before present,null,paleoceanography,null,null,N,null</Detailed_Variable>
  </Parameters>
  <Parameters>
    <Category>earth science</Category>
    <Topic>paleoclimate</Topic>
    <Term>paleoceanography</Term>
    <Detailed_Variable>age,null,unspecified margin of error,radiocarbon year before present,null,paleoceanography,corrected,null,N,corrected using delta R value</Detailed_Variable>
  </Parameters>
  <Parameters>
    <Category>earth science</Category>
    <Topic>paleoclimate</Topic>
    <Term>paleoceanography</Term>
    <Detailed_Variable>growth rate,bivalve,null,micrometer,null,paleoceanography,null,null,N,Arctica islandica; unspecified measurement</Detailed_Variable>
  </Parameters>
  <Parameters>
    <Category>earth science</Category>
    <Topic>paleoclimate</Topic>
    <Term>paleocean</Term>
    <Variable_Level_1>carbon isotopes</Variable_Level_1>
  </Parameters>
  <Parameters>
    <Category>earth science</Category>
    <Topic>paleoclimate</Topic>
    <Term>paleocean</Term>
    <Variable_Level_1>physical properties</Variable_Level_1>
  </Parameters>
  <Parameters>
    <Category>earth science</Category>
    <Topic>paleoclimate</Topic>
    <Term>paleocean</Term>
    <Variable_Level_1>reconstruction</Variable_Level_1>
  </Parameters>
  <Parameters>
    <Category>earth science</Category>
    <Topic>paleoclimate</Topic>
    <Term>paleocean</Term>
    <Variable_Level_1>age control</Variable_Level_1>
  </Parameters>
  <ISO_Topic_Category>geoscientificInformation</ISO_Topic_Category>
  <Paleo_Temporal_Coverage>
    <Paleo_Start_Date>1516 AD</Paleo_Start_Date>
    <Paleo_Stop_Date>2004 AD</Paleo_Stop_Date>
  </Paleo_Temporal_Coverage>
  <Paleo_Temporal_Coverage>
    <Paleo_Start_Date>434 cal yr BP</Paleo_Start_Date>
    <Paleo_Stop_Date>-54 cal yr BP</Paleo_Stop_Date>
  </Paleo_Temporal_Coverage>
  <Data_Set_Progress>Complete</Data_Set_Progress>
  <Spatial_Coverage>
    <Southernmost_Latitude>53.96667</Southernmost_Latitude>
    <Northernmost_Latitude>54.31667</Northernmost_Latitude>
    <Westernmost_Longitude>-4.91667</Westernmost_Longitude>
    <Easternmost_Longitude>-4.68333</Easternmost_Longitude>
  </Spatial_Coverage>
  <Location>
    <Location_Category>Ocean</Location_Category>
    <Location_Type>Atlantic Ocean</Location_Type>
    <Location_Subregion1>North Atlantic Ocean</Location_Subregion1>
    <Location_Subregion2>Irish Sea</Location_Subregion2>
    <Detailed_Location>Irish Sea West of Isle of Man&gt;LATITUDE 54.15&gt;LONGITUDE -4.8</Detailed_Location>
  </Location>
  <Access_Constraints>None</Access_Constraints>
  <Use_Constraints>Please cite original publication, online resource, dataset and publication DOIs (where available), and date accessed when using downloaded data. If there is no publication information, please cite investigator, title, online resource, and date accessed. The appearance of external links associated with a dataset does not constitute endorsement by the Department of Commerce/National Oceanic and Atmospheric Administration of external Web sites or the information, products or services contained therein. For other than authorized activities, the Department of Commerce/NOAA does not exercise any editorial control over the information you may find at these locations. These links are provided consistent with the stated purpose of this Department of Commerce/NOAA Web site.</Use_Constraints>
  <Data_Set_Language>English</Data_Set_Language>
  <Data_Center>
    <Data_Center_Name>
      <Short_Name>DOC/NOAA/NESDIS/NCEI</Short_Name>
      <Long_Name>National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce </Long_Name>
    </Data_Center_Name>
    <Data_Center_URL>https://www.ncdc.noaa.gov/data-access/paleoclimatology-data</Data_Center_URL>
    <Personnel>
      <Role>DATA Center Contact</Role>
      <First_Name>Bruce</First_Name>
      <Last_Name>Bauer</Last_Name>
      <Email>bruce.a.bauer@noaa.gov</Email>
      <Email>paleo@noaa.gov</Email>
      <Phone>303-497-6280</Phone>
      <Fax>303-497-6513</Fax>
      <Contact_Address>
        <Address>325 Broadway, E/NE31</Address>
        <City>Boulder</City>
        <Province_or_State>CO</Province_or_State>
        <Postal_Code>80305-3328</Postal_Code>
        <Country>USA</Country>
      </Contact_Address>
    </Personnel>
  </Data_Center>
  <Distribution>
    <Distribution_Media>online</Distribution_Media>
    <Distribution_Format>ASCII</Distribution_Format>
  </Distribution>
  <Reference>Butler, P.G., J.D. Scourse, C.A. Richardson, A.D. Wanamaker, C.L. Bryant and J.D. Bennell. 2009. Continuous marine radiocarbon reservoir calibration and the 13C Suess effect in the Irish Sea: Results from the first multi-centennial shell-based marine master chronology. Earth and Planetary Science Letters, 279, 230-241. doi: 10.1016/j.epsl.2008.12.043</Reference>
  <Reference>Butler, P.G., C.A. Richardson, J.D. Scourse, A.D. Wanamaker, T.M. Shammon, and J.D. Bennell. 2010. Marine climate in the Irish Sea: analysis of a 489-year marine master chronology derived from growth increments in the shell of the clam Arctica islandica. Quaternary Science Reviews, 29(13-14), 1614-1632.  doi: 10.1016/j.quascirev.2009.07.010</Reference>
  <Summary>
    <Abstract>The identification in various proxy records of periods of rapid (decadal scale) climate change over recent millennia, together with the possibility that feedback mechanisms may amplify climate system responses to increasing atmospheric CO2, highlights the importance of a detailed understanding, at high spatial and temporal resolutions, of forcings and feedbacks within the system. Such an understanding has hitherto been limited because the temperate marine environment has lacked an absolute timescale of the kind provided by tree-rings for the terrestrial environment and by corals for the tropical marine environment. Here we present the first annually resolved, multi-centennial (489-year), absolutely dated, shell-based marine master chronology. The chronology has been constructed by detrending and averaging annual growth increment widths in the shells of multiple specimens of the very long-lived bivalve mollusc Arctica islandica, collected from sites to the south and west of the Isle of Man in the Irish Sea. The strength of the common environmental signal expressed in the chronology is fully comparable with equivalent statistics for tree-ring chronologies. Analysis of the 14C signal in the shells shows no trend in the marine radiocarbon reservoir correction (ΔR), although it may be more variable before ∼1750. The δ13C signal shows a very significant (R2=0.456, pb0.0001) trend due to the 13C Suess effect. 
          STUDY NOTES: These datasets include raw measurements of annual growth increments in shells of the mollusc Arctica islandica from sites close to the Isle of Man, Irish Sea; crossdated chronologies derived using mean value functions of the detrended raw measurements; delta 13C data and radiocarbon data, including the marine radiocarbon reservoir correction (delta R). All these data are used in Butler et al 2009, and the chronologies are also used in Butler et al 2010, Quaternary Science Reviews 29(2010) 1614-1632
Keywords: Sclerochronology, Irish Sea, Arctica islandica</Abstract>
  </Summary>
  <Related_URL>
    <URL_Content_Type>
      <Type>GET DATA</Type>
    </URL_Content_Type>
    <URL>https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/butler2009/butler2009-chron.txt</URL>
  </Related_URL>
  <Related_URL>
    <URL_Content_Type>
      <Type>GET DATA</Type>
    </URL_Content_Type>
    <URL>https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/butler2009/butler2009-deltaR.txt</URL>
  </Related_URL>
  <Related_URL>
    <URL_Content_Type>
      <Type>GET DATA</Type>
    </URL_Content_Type>
    <URL>https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/butler2009/butler2009-raw.txt</URL>
  </Related_URL>
  <Related_URL>
    <URL_Content_Type>
      <Type>GET DATA</Type>
    </URL_Content_Type>
    <URL>https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/butler2009/butler2009-d13C.txt</URL>
  </Related_URL>
  <IDN_Node>
    <Short_Name>USA/NOAA</Short_Name>
  </IDN_Node>
  <Metadata_Name>DIF</Metadata_Name>
  <Metadata_Version>Version 9.8.4</Metadata_Version>
  <DIF_Creation_Date>2018-12-11</DIF_Creation_Date>
  <Last_DIF_Revision_Date>2018-12-11</Last_DIF_Revision_Date>
</DIF>
