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

Sturevik-Storm, Anna; Aldahan, Ala; Possnert, Göran; Berggren, Ann-Marie; Muscheler, Raimund LU ; Dahl-Jensen, Dorthe; Vinther, Bo M and Usoskin, Ilya (2014) In Scientific Reports 4.
Abstract
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... (More)
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. (Less)
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Contribution to journal
publication status
published
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in
Scientific Reports
volume
4
publisher
Nature Publishing Group
external identifiers
  • pmid:25266953
  • wos:000342448600001
  • scopus:84923376346
ISSN
2045-2322
DOI
10.1038/srep06408
project
MERGE
language
English
LU publication?
yes
id
9627a002-6c0b-4b7b-9350-768f0e5800af (old id 4738793)
date added to LUP
2014-11-14 12:27:38
date last changed
2017-06-11 04:07:30
@article{9627a002-6c0b-4b7b-9350-768f0e5800af,
  abstract     = {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.},
  articleno    = {6408},
  author       = {Sturevik-Storm, Anna and Aldahan, Ala and Possnert, Göran and Berggren, Ann-Marie and Muscheler, Raimund and Dahl-Jensen, Dorthe and Vinther, Bo M and Usoskin, Ilya},
  issn         = {2045-2322},
  language     = {eng},
  publisher    = {Nature Publishing Group},
  series       = {Scientific Reports},
  title        = {(10)Be climate fingerprints during the Eemian in the NEEM ice core, Greenland.},
  url          = {http://dx.doi.org/10.1038/srep06408},
  volume       = {4},
  year         = {2014},
}