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Raimund Muscheler

Raimund Muscheler

Professor

Raimund Muscheler

(10)Be climate fingerprints during the Eemian in the NEEM ice core, Greenland.

Author

  • Anna Sturevik-Storm
  • Ala Aldahan
  • Göran Possnert
  • Ann-Marie Berggren
  • Raimund Muscheler
  • Dorthe Dahl-Jensen
  • Bo M Vinther
  • Ilya Usoskin

Summary, in English

Several deep Greenland ice cores have been retrieved, however, capturing the Eemian period has been problematic due to stratigraphic disturbances in the ice. The new Greenland deep ice core from the NEEM site (77.45°N, 51.06°W, 2450 m.a.s.l) recovered a relatively complete Eemian record. Here we discuss the cosmogenic (10)Be isotope record from this core. The results show Eemian average (10)Be concentrations about 0.7 times lower than in the Holocene which suggests a warmer climate and approximately 65-90% higher precipitation in Northern Greenland compared to today. Effects of shorter solar variations on (10)Be concentration are smoothed out due to coarse time resolution, but occurrence of a solar maximum at 115.26-115.36 kyr BP is proposed. Relatively high (10)Be concentrations are found in the basal ice sections of the core which may originate from the glacial-interglacial transition and relate to a geomagnetic excursion about 200 kyr BP.

Department/s

  • Quaternary Sciences
  • MERGE: ModElling the Regional and Global Earth system

Publishing year

2014

Language

English

Publication/Series

Scientific Reports

Volume

4

Document type

Journal article

Publisher

Nature Publishing Group

Topic

  • Physical Geography

Status

Published

ISBN/ISSN/Other

  • ISSN: 2045-2322