East Asian monsoon variations directly recorded in the Greenlandic North-GRIP ice core
Ice cores from central Greenland are the temporally best resolved records of northern hemisphere climate of the last glacial period. Here we show that during the last glacial period (MIS 4 to MIS 2) East Asian Monsoon variations are directly recorded in the North-GRIP ice core (north-central Greenla...
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ftawi:oai:epic.awi.de:11698 2023-09-05T13:19:02+02:00 East Asian monsoon variations directly recorded in the Greenlandic North-GRIP ice core Ruth, Urs Siggard-Andersen, M. L. Kipfstuhl, Sepp Bigler, M. Röthlisberger, R. Steffensen, J. P. Johnsen, S. Hansson, M. 2004 https://epic.awi.de/id/eprint/11698/ https://hdl.handle.net/10013/epic.22144 unknown Ruth, U. , Siggard-Andersen, M. L. , Kipfstuhl, S. , Bigler, M. , Röthlisberger, R. , Steffensen, J. P. , Johnsen, S. and Hansson, M. (2004) East Asian monsoon variations directly recorded in the Greenlandic North-GRIP ice core , AGU Fall Meeting 13-17 Dec. 2004 San Francisco USA. . hdl:10013/epic.22144 EPIC3AGU Fall Meeting 13-17 Dec. 2004 San Francisco USA. Conference notRev 2004 ftawi 2023-08-22T19:49:29Z Ice cores from central Greenland are the temporally best resolved records of northern hemisphere climate of the last glacial period. Here we show that during the last glacial period (MIS 4 to MIS 2) East Asian Monsoon variations are directly recorded in the North-GRIP ice core (north-central Greenland). The East Asian Winter Monsoon (EAWM) strength as inferred from Chinese loess deposits correlates well with the concentration and size distribution of insoluble mineral particles in the North-GRIP core, and we infer that the ice core microparticle record can be taken as a proxy for EAWM. Further, variations of the East Asian Summer Monsoon (EASM) strength are coincident with changes of the Ca2+/particle ratio at North-GRIP. In light of these findings and taking d18O as a proxy for North Atlantic temperature we investigate the rapid climatic transitions during the last glacial period (Dansgaard-Oeschger events). We discuss differences between the changes of EAWM, EASM, and North Atlantic temperature regarding their timing at these rapid transitions; this can be done with unforeseen accuracy because all proxies are from the same archive and do not underlie relative dating uncertainties. Furthermore we find that before 75ka BP (i.e. before the MIS 4/5-transition) atmospheric circulation patterns in the northern hemisphere as well as teleconnections between North Atlantic circulation and the East Asian Monsoon system must have been substantially different. They underwent considerable reorganisation, which may be linked to the build up of large ice sheets in the northern hemisphere during this time. Conference Object Dansgaard-Oeschger events Greenland greenlandic GRIP ice core North Atlantic Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Greenland |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
Ice cores from central Greenland are the temporally best resolved records of northern hemisphere climate of the last glacial period. Here we show that during the last glacial period (MIS 4 to MIS 2) East Asian Monsoon variations are directly recorded in the North-GRIP ice core (north-central Greenland). The East Asian Winter Monsoon (EAWM) strength as inferred from Chinese loess deposits correlates well with the concentration and size distribution of insoluble mineral particles in the North-GRIP core, and we infer that the ice core microparticle record can be taken as a proxy for EAWM. Further, variations of the East Asian Summer Monsoon (EASM) strength are coincident with changes of the Ca2+/particle ratio at North-GRIP. In light of these findings and taking d18O as a proxy for North Atlantic temperature we investigate the rapid climatic transitions during the last glacial period (Dansgaard-Oeschger events). We discuss differences between the changes of EAWM, EASM, and North Atlantic temperature regarding their timing at these rapid transitions; this can be done with unforeseen accuracy because all proxies are from the same archive and do not underlie relative dating uncertainties. Furthermore we find that before 75ka BP (i.e. before the MIS 4/5-transition) atmospheric circulation patterns in the northern hemisphere as well as teleconnections between North Atlantic circulation and the East Asian Monsoon system must have been substantially different. They underwent considerable reorganisation, which may be linked to the build up of large ice sheets in the northern hemisphere during this time. |
format |
Conference Object |
author |
Ruth, Urs Siggard-Andersen, M. L. Kipfstuhl, Sepp Bigler, M. Röthlisberger, R. Steffensen, J. P. Johnsen, S. Hansson, M. |
spellingShingle |
Ruth, Urs Siggard-Andersen, M. L. Kipfstuhl, Sepp Bigler, M. Röthlisberger, R. Steffensen, J. P. Johnsen, S. Hansson, M. East Asian monsoon variations directly recorded in the Greenlandic North-GRIP ice core |
author_facet |
Ruth, Urs Siggard-Andersen, M. L. Kipfstuhl, Sepp Bigler, M. Röthlisberger, R. Steffensen, J. P. Johnsen, S. Hansson, M. |
author_sort |
Ruth, Urs |
title |
East Asian monsoon variations directly recorded in the Greenlandic North-GRIP ice core |
title_short |
East Asian monsoon variations directly recorded in the Greenlandic North-GRIP ice core |
title_full |
East Asian monsoon variations directly recorded in the Greenlandic North-GRIP ice core |
title_fullStr |
East Asian monsoon variations directly recorded in the Greenlandic North-GRIP ice core |
title_full_unstemmed |
East Asian monsoon variations directly recorded in the Greenlandic North-GRIP ice core |
title_sort |
east asian monsoon variations directly recorded in the greenlandic north-grip ice core |
publishDate |
2004 |
url |
https://epic.awi.de/id/eprint/11698/ https://hdl.handle.net/10013/epic.22144 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Dansgaard-Oeschger events Greenland greenlandic GRIP ice core North Atlantic |
genre_facet |
Dansgaard-Oeschger events Greenland greenlandic GRIP ice core North Atlantic |
op_source |
EPIC3AGU Fall Meeting 13-17 Dec. 2004 San Francisco USA. |
op_relation |
Ruth, U. , Siggard-Andersen, M. L. , Kipfstuhl, S. , Bigler, M. , Röthlisberger, R. , Steffensen, J. P. , Johnsen, S. and Hansson, M. (2004) East Asian monsoon variations directly recorded in the Greenlandic North-GRIP ice core , AGU Fall Meeting 13-17 Dec. 2004 San Francisco USA. . hdl:10013/epic.22144 |
_version_ |
1776199858857705472 |