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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 orcid ; 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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author
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organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Scientific Reports
volume
4
article number
6408
publisher
Nature Publishing Group
external identifiers
  • pmid:25266953
  • wos:000342448600001
  • scopus:84923376346
  • pmid:25266953
ISSN
2045-2322
DOI
10.1038/srep06408
language
English
LU publication?
yes
id
9627a002-6c0b-4b7b-9350-768f0e5800af (old id 4738793)
date added to LUP
2016-04-01 13:41:32
date last changed
2022-02-04 08:47:56
@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.}},
  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}},
  doi          = {{10.1038/srep06408}},
  volume       = {{4}},
  year         = {{2014}},
}