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The Cryosphere An interactive open-access journal of the European Geosciences Union
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Discussion papers
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Submitted as: research article 08 Mar 2019

Submitted as: research article | 08 Mar 2019

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This discussion paper is a preprint. It is a manuscript under review for the journal The Cryosphere (TC).

10,000 years of melt history of the 2015 Renland ice core, EastGreenland

Tetsuro Taranczewski1, Johannes Freitag1, Olaf Eisen1,3, Bo Vinther2, Sonja Wahl2, and Sepp Kipfstuhl1 Tetsuro Taranczewski et al.
  • 1Alfred Wegener Institute, Helmholtz Centre of Polar and Marine Research, Bremerhaven, Germany
  • 2Centre for Ice and Climate, Niels Bohr Institute, University of Copenhagen, Copenhagen, Denmark
  • 3Department of Geosciences, University of Bremen, Bremen, Germany

Abstract. An ice core drilled in 2015 on the Renland ice cap at the eastern margin of Greenland has been inspected with regard to its melt content. The thickness of a melt layer reflects the temperature level at the time of melt generation. Hence the melt layers are an indicator of past regional summer temperatures in East Greenland, a region where paleoclimate records are sparse. Melt layers have been identified almost along the whole core, resulting in a melt record reaching back 10,000 years. By gathering additional information about melt rates as well as high-resolution densities in two shallow cores, we developed an approach to correct the annual melt content for the ice volume that gets lost by the thinning process. The result is a melt record with decadal- to centennial- scale resolution for the last two millennia, and the most accurate Holocene climate record for Eastern Greenland so far. The observed changes of annual melt rates show a warm early Holocene, with melt rates higher than in the recent past century, and minimum melting during the Little Ice Age. Current melt rates show a strong increase for the early 20th century as well as for the time since the end of the past century, with the recent 2012 extreme melting of the Greenland Ice Sheet being the strongest melt event in the past 500 years.

Tetsuro Taranczewski et al.
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Tetsuro Taranczewski et al.
Data sets

Annual melt ratios obtained from Meltlayer catalogs of the RECAP ice core, East Greenland T. Taranczewski

Tetsuro Taranczewski et al.
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Publications Copernicus
Short summary
We used melt layers detected in ice cores from the Renland ice cap in East Greenland to find evidence of past climate trends in this region. Our record provides such information for the past 10,000 years. We developed an attempt to increase the reliability of such a record by correcting deformation-induced biases. It proves that such simple to obtain melt records can be used to gather information about paleoclimate especially for regions where climate records are sparse.
We used melt layers detected in ice cores from the Renland ice cap in East Greenland to find...