High-resolution Greenland Ice Core data show abrupt climate change happens in few years

Research output: Contribution to journalJournal article – Annual report year: 2008Researchpeer-review

Without internal affiliation

DOI

  • Author: Steffensen, Jorgen Peder

    University of Copenhagen, Denmark

  • Author: Andersen, Katrine Krogh

    University of Copenhagen

  • Author: Bigler, Matthias

    University of Copenhagen, Denmark

  • Author: Clausen, Henrik B.

    University of Copenhagen, Denmark

  • Author: Dahl-Jensen, Dorthe

    University of Copenhagen, Denmark

  • Author: Fischer, Hubertus

    University of Bern, Switzerland

  • Author: Goto-Azuma, Kumiko

    National Institute of Polar Research, Japan

  • Author: Hansson, Margareta

    Stockholm University, Sweden

  • Author: Johnsen, Sigfus J.

    University of Copenhagen, Denmark

  • Author: Jouzel, Jean

    French Alternative Energies and Atomic Energy Commission, France

  • Author: Masson-Delmotte, Valerie

    French Alternative Energies and Atomic Energy Commission, France

  • Author: Popp, Trevor James

    University of Colorado Boulder, United States

  • Author: Rasmussen, Sune O.

    University of Copenhagen, Denmark

  • Author: Roethlisberger, Regine

    University of Bern, Switzerland

  • Author: Ruth, Urs

    Alfred Wegener Institute - Helmholtz Centre for Polar and Marine Research, Germany

  • Author: Stauffer, Bernhard

    University of Bern, Switzerland

  • Author: Siggaard-Andersen, Marie-Louise

    University of Copenhagen, Denmark

  • Author: Sveinbjornsdottir, Arny E.

    University of Iceland, Iceland

  • Author: Svensson, Anders

    University of Copenhagen, Denmark

  • Author: White, James W. C.

    University of Colorado Boulder, United States

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The last two abrupt warmings at the onset of our present warm interglacial period, interrupted by the Younger Dryas cooling event, were investigated at high temporal resolution from the North Greenland Ice Core Project ice core. The deuterium excess, a proxy of Greenland precipitation moisture source, switched mode within 1 to 3 years over these transitions and initiated a more gradual change ( over 50 years) of the Greenland air temperature, as recorded by stable water isotopes. The onsets of both abrupt Greenland warmings were slightly preceded by decreasing Greenland dust deposition, reflecting the wetting of Asian deserts. A northern shift of the Intertropical Convergence Zone could be the trigger of these abrupt shifts of Northern Hemisphere atmospheric circulation, resulting in changes of 2 to 4 kelvin in Greenland moisture source temperature from one year to the next.
Original languageEnglish
JournalScience
Volume321
Issue number5889
Pages (from-to)680-684
Number of pages5
ISSN0036-8075
DOIs
Publication statusPublished - 2008
Externally publishedYes
CitationsWeb of Science® Times Cited: No match on DOI

ID: 130072047