Two modes of glacial climate during the late stage 5 identified in Greenland ice core records
From a detailed analysis of marine and terrestrial aerosol tracers in the NGRIP ice core we identified two distinct glacial atmospheric flow patterns. The climate transition from Marine Isotope Stage 5 (MIS 5) to MIS 4, at approximately 75 kyr BP, marks a shift between two different atmospheric flow...
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ftcopernicus:oai:publications.copernicus.org:cpd6255 2023-05-15T16:27:25+02:00 Two modes of glacial climate during the late stage 5 identified in Greenland ice core records Siggaard-Andersen, M.-L. Ditlevsen, P. D. Walløe Hansen, A. Johnsen, S. J. 2018-09-26 application/pdf https://doi.org/10.5194/cpd-3-285-2007 https://cp.copernicus.org/preprints/cpd-2007-0002/ eng eng doi:10.5194/cpd-3-285-2007 https://cp.copernicus.org/preprints/cpd-2007-0002/ eISSN: 1814-9332 Text 2018 ftcopernicus https://doi.org/10.5194/cpd-3-285-2007 2020-07-20T16:27:08Z From a detailed analysis of marine and terrestrial aerosol tracers in the NGRIP ice core we identified two distinct glacial atmospheric flow patterns. The climate transition from Marine Isotope Stage 5 (MIS 5) to MIS 4, at approximately 75 kyr BP, marks a shift between two different atmospheric flow regimes. Before this transition, during MIS 5d-a, the state of atmospheric flow was alternating between the two modes of different flow patterns, while a more persistent flow pattern was prevailing through the glacial period afterwards. These changes are accompanied by strong changes in an independent Greenland ice core proxy, namely the deuterium excess from the GRIP ice core, reflecting changes in the hydrological cycle and moisture source temperatures as well. The changes in atmospheric flow pattern are correlated with changed extent of ice-rafted detritus (IRD) deposition in the North Atlantic, indicating that the state of the atmospheric flow was highly sensitive to the waxing and waning of the Laurentide ice sheet. Text Greenland Greenland ice core GRIP ice core Ice Sheet NGRIP North Atlantic Copernicus Publications: E-Journals Greenland |
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Copernicus Publications: E-Journals |
op_collection_id |
ftcopernicus |
language |
English |
description |
From a detailed analysis of marine and terrestrial aerosol tracers in the NGRIP ice core we identified two distinct glacial atmospheric flow patterns. The climate transition from Marine Isotope Stage 5 (MIS 5) to MIS 4, at approximately 75 kyr BP, marks a shift between two different atmospheric flow regimes. Before this transition, during MIS 5d-a, the state of atmospheric flow was alternating between the two modes of different flow patterns, while a more persistent flow pattern was prevailing through the glacial period afterwards. These changes are accompanied by strong changes in an independent Greenland ice core proxy, namely the deuterium excess from the GRIP ice core, reflecting changes in the hydrological cycle and moisture source temperatures as well. The changes in atmospheric flow pattern are correlated with changed extent of ice-rafted detritus (IRD) deposition in the North Atlantic, indicating that the state of the atmospheric flow was highly sensitive to the waxing and waning of the Laurentide ice sheet. |
format |
Text |
author |
Siggaard-Andersen, M.-L. Ditlevsen, P. D. Walløe Hansen, A. Johnsen, S. J. |
spellingShingle |
Siggaard-Andersen, M.-L. Ditlevsen, P. D. Walløe Hansen, A. Johnsen, S. J. Two modes of glacial climate during the late stage 5 identified in Greenland ice core records |
author_facet |
Siggaard-Andersen, M.-L. Ditlevsen, P. D. Walløe Hansen, A. Johnsen, S. J. |
author_sort |
Siggaard-Andersen, M.-L. |
title |
Two modes of glacial climate during the late stage 5 identified in Greenland ice core records |
title_short |
Two modes of glacial climate during the late stage 5 identified in Greenland ice core records |
title_full |
Two modes of glacial climate during the late stage 5 identified in Greenland ice core records |
title_fullStr |
Two modes of glacial climate during the late stage 5 identified in Greenland ice core records |
title_full_unstemmed |
Two modes of glacial climate during the late stage 5 identified in Greenland ice core records |
title_sort |
two modes of glacial climate during the late stage 5 identified in greenland ice core records |
publishDate |
2018 |
url |
https://doi.org/10.5194/cpd-3-285-2007 https://cp.copernicus.org/preprints/cpd-2007-0002/ |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Greenland ice core GRIP ice core Ice Sheet NGRIP North Atlantic |
genre_facet |
Greenland Greenland ice core GRIP ice core Ice Sheet NGRIP North Atlantic |
op_source |
eISSN: 1814-9332 |
op_relation |
doi:10.5194/cpd-3-285-2007 https://cp.copernicus.org/preprints/cpd-2007-0002/ |
op_doi |
https://doi.org/10.5194/cpd-3-285-2007 |
_version_ |
1766016595516194816 |