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Rapid reductions and millennial-scale variability in Nordic Seas sea ice cover during abrupt glacial climate changes

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اقرأ أكثر حفظ في قائمتي
  • المؤلفون: Sadatzki, Henrik; Maffezzoli, Niccolo; Dokken, Trond M.; Simon, Margit H.; Berben, Sarah M. P.; Fahl, Kirsten; Kjor, Helle A.; Spolaor, Andrea; Stein, Ruediger; Vallelonga, Paul; Vinther, Bo M.; Jansen, Eystein
  • المصدر:
    Sadatzki , H , Maffezzoli , N , Dokken , T M , Simon , M H , Berben , S M P , Fahl , K , Kjor , H A , Spolaor , A , Stein , R , Vallelonga , P , Vinther , B M & Jansen , E 2020 , ' Rapid reductions and millennial-scale variability in Nordic Seas sea ice cover during abrupt glacial climate changes ' , Proceedings of the National Academy of Sciences of the United States of America , vol. 117 , no. 47 , pp. 29478-29486 .
  • نوع التسجيلة:
    Electronic Resource
  • الدخول الالكتروني :
    https://researchprofiles.ku.dk/da/publications/rapid-reductions-and-millennialscale-variability-in-nordic-seas-sea-ice-cover-during-abrupt-glacial-climate-changes(3cc7b753-fba8-42c9-b7e3-4b3926e24857).html
    https://doi.org/10.1073/pnas.2005849117
    https://curis.ku.dk/ws/files/253650212/29478.full.pdf
  • معلومة اضافية
    • Publisher Information:
      2020-11-24
    • نبذة مختصرة :
      Constraining the past sea ice variability in the Nordic Seas is critical for a comprehensive understanding of the abrupt DansgaardOeschger (D-O) climate changes during the last glacial. Here we present unprecedentedly detailed sea ice proxy evidence from two Norwegian Sea sediment cores and an East Greenland ice core to resolve and constrain sea ice variations during four D-O events between 32 and 41 ka. Our independent sea ice records consistently reveal a millennial-scale variability and threshold response between an extensive seasonal sea ice cover in the Nordic Seas during cold stadials and reduced seasonal sea ice conditions during warmer interstadials. They document substantial and rapid sea ice reductions that may have happened within 250 y or less, concomitant with reinvigoration of deep convection in the Nordic Seas and the abrupt warming transitions in Greenland. Our empirical evidence thus underpins the cardinal role of rapid sea ice decline and related feedbacks to trigger abrupt and large-amplitude climate change of the glacial D-O events.
    • الموضوع:
      sea ice; Nordic Seas; Dansgaard-Oeschger events; abrupt climate change; HIGH-RESOLUTION RECORD; NORTH-ATLANTIC; HALOGEN DEPOSITION; OCEAN CIRCULATION; BIOMARKER; MARINE; RECONSTRUCTIONS; INSTABILITY; CONVECTION; ANOMALIES; article
    • Availability:
      Open access content. Open access content
      info:eu-repo/semantics/openAccess
    • Note:
      application/pdf
      English
    • Other Numbers:
      DAV oai:pure.atira.dk:publications/3cc7b753-fba8-42c9-b7e3-4b3926e24857
      1322753032
    • Contributing Source:
      UNIV OF COPENHAGEN
      From OAIster®, provided by the OCLC Cooperative.
    • الرقم المعرف:
      edsoai.on1322753032
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