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

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 dis...

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Autores principales: Sturevik-Storm, Anna, Aldahan, Ala, Possnert, Göran, Berggren, Ann-Marie, Muscheler, Raimund, Dahl-Jensen, Dorthe, Vinther, Bo M., Usoskin, Ilya
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2014
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4179124/
https://www.ncbi.nlm.nih.gov/pubmed/25266953
http://dx.doi.org/10.1038/srep06408
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author Sturevik-Storm, Anna
Aldahan, Ala
Possnert, Göran
Berggren, Ann-Marie
Muscheler, Raimund
Dahl-Jensen, Dorthe
Vinther, Bo M.
Usoskin, Ilya
author_facet Sturevik-Storm, Anna
Aldahan, Ala
Possnert, Göran
Berggren, Ann-Marie
Muscheler, Raimund
Dahl-Jensen, Dorthe
Vinther, Bo M.
Usoskin, Ilya
author_sort Sturevik-Storm, Anna
collection PubMed
description 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.
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spelling pubmed-41791242014-10-02 (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 Dahl-Jensen, Dorthe Vinther, Bo M. Usoskin, Ilya Sci Rep Article 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. Nature Publishing Group 2014-09-30 /pmc/articles/PMC4179124/ /pubmed/25266953 http://dx.doi.org/10.1038/srep06408 Text en Copyright © 2014, Macmillan Publishers Limited. All rights reserved http://creativecommons.org/licenses/by-nc-sa/4.0/ This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder in order to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-sa/4.0/
spellingShingle Article
Sturevik-Storm, Anna
Aldahan, Ala
Possnert, Göran
Berggren, Ann-Marie
Muscheler, Raimund
Dahl-Jensen, Dorthe
Vinther, Bo M.
Usoskin, Ilya
(10)Be climate fingerprints during the Eemian in the NEEM ice core, Greenland
title (10)Be climate fingerprints during the Eemian in the NEEM ice core, Greenland
title_full (10)Be climate fingerprints during the Eemian in the NEEM ice core, Greenland
title_fullStr (10)Be climate fingerprints during the Eemian in the NEEM ice core, Greenland
title_full_unstemmed (10)Be climate fingerprints during the Eemian in the NEEM ice core, Greenland
title_short (10)Be climate fingerprints during the Eemian in the NEEM ice core, Greenland
title_sort (10)be climate fingerprints during the eemian in the neem ice core, greenland
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4179124/
https://www.ncbi.nlm.nih.gov/pubmed/25266953
http://dx.doi.org/10.1038/srep06408
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