Millennial and sub-millennial scale climatic variations recorded in polar ice cores over the last glacial period
Since its discovery in Greenland ice cores, the millennial scale climatic variability of the last glacial period has been increasingly documented at all latitudes with studies focusing mainly on Marine Isotopic Stage 3 (MIS 3; 28-60 thousand of years before present, hereafter ka) and characterized b...
Published in: | Climate of the Past |
---|---|
Main Authors: | , , , , , , , , , , , , , , |
Format: | Text |
Language: | unknown |
Published: |
Gottingen, Copernicus GmbH
2022
|
Subjects: | |
Online Access: | https://doi.org/10.5194/cp-6-345-2010 https://infoscience.epfl.ch/record/298348/files/cp-6-345-2010.pdf http://infoscience.epfl.ch/record/298348 |
id |
ftinfoscience:oai:infoscience.epfl.ch:298348 |
---|---|
record_format |
openpolar |
spelling |
ftinfoscience:oai:infoscience.epfl.ch:298348 2023-05-15T13:43:17+02:00 Millennial and sub-millennial scale climatic variations recorded in polar ice cores over the last glacial period Capron, E. Landais, A. Chappellaz, J. Schilt, A. Buiron, D. Dahl-Jensen, D. Johnsen, S. J. Jouzel, J. Lemieux-Dudon, B. Loulergue, L. Leuenberger, M. Masson-Delmotte, V. Meyer, H. Oerter, H. Stenni, B. 2022-11-23T16:11:41Z https://doi.org/10.5194/cp-6-345-2010 https://infoscience.epfl.ch/record/298348/files/cp-6-345-2010.pdf http://infoscience.epfl.ch/record/298348 unknown Gottingen, Copernicus GmbH isi:000279390500006 doi:10.5194/cp-6-345-2010 https://infoscience.epfl.ch/record/298348/files/cp-6-345-2010.pdf http://infoscience.epfl.ch/record/298348 http://infoscience.epfl.ch/record/298348 Text 2022 ftinfoscience https://doi.org/10.5194/cp-6-345-2010 2023-02-13T23:12:34Z Since its discovery in Greenland ice cores, the millennial scale climatic variability of the last glacial period has been increasingly documented at all latitudes with studies focusing mainly on Marine Isotopic Stage 3 (MIS 3; 28-60 thousand of years before present, hereafter ka) and characterized by short Dansgaard-Oeschger (DO) events. Recent and new results obtained on the EPICA and NorthGRIP ice cores now precisely describe the rapid variations of Antarctic and Greenland temperature during MIS 5 (73.5-123 ka), a time period corresponding to relatively high sea level. The results display a succession of abrupt events associated with long Greenland InterStadial phases (GIS) enabling us to highlight a sub-millennial scale climatic variability depicted by (i) short-lived and abrupt warming events preceding some GIS (precursor-type events) and (ii) abrupt warming events at the end of some GIS (rebound-type events). The occurrence of these sub-millennial scale events is suggested to be driven by the insolation at high northern latitudes together with the internal forcing of ice sheets. Thanks to a recent NorthGRIP-EPICA Dronning Maud Land (EDML) common timescale over MIS 5, the bipolar sequence of climatic events can be established at millennial to sub-millennial timescale. This shows that for extraordinary long stadial durations the accompanying Antarctic warming amplitude cannot be described by a simple linear relationship between the two as expected from the bipolar seesaw concept. We also show that when ice sheets are extensive, Antarctica does not necessarily warm during the whole GS as the thermal bipolar seesaw model would predict, questioning the Greenland ice core temperature records as a proxy for AMOC changes throughout the glacial period. © Author(s) 2010. Text Antarc* Antarctic Antarctica Dronning Maud Land EPICA Greenland Greenland ice core Greenland ice cores ice core EPFL Infoscience (Ecole Polytechnique Fédérale Lausanne) Antarctic Dronning Maud Land Greenland Climate of the Past 6 3 345 365 |
institution |
Open Polar |
collection |
EPFL Infoscience (Ecole Polytechnique Fédérale Lausanne) |
op_collection_id |
ftinfoscience |
language |
unknown |
description |
Since its discovery in Greenland ice cores, the millennial scale climatic variability of the last glacial period has been increasingly documented at all latitudes with studies focusing mainly on Marine Isotopic Stage 3 (MIS 3; 28-60 thousand of years before present, hereafter ka) and characterized by short Dansgaard-Oeschger (DO) events. Recent and new results obtained on the EPICA and NorthGRIP ice cores now precisely describe the rapid variations of Antarctic and Greenland temperature during MIS 5 (73.5-123 ka), a time period corresponding to relatively high sea level. The results display a succession of abrupt events associated with long Greenland InterStadial phases (GIS) enabling us to highlight a sub-millennial scale climatic variability depicted by (i) short-lived and abrupt warming events preceding some GIS (precursor-type events) and (ii) abrupt warming events at the end of some GIS (rebound-type events). The occurrence of these sub-millennial scale events is suggested to be driven by the insolation at high northern latitudes together with the internal forcing of ice sheets. Thanks to a recent NorthGRIP-EPICA Dronning Maud Land (EDML) common timescale over MIS 5, the bipolar sequence of climatic events can be established at millennial to sub-millennial timescale. This shows that for extraordinary long stadial durations the accompanying Antarctic warming amplitude cannot be described by a simple linear relationship between the two as expected from the bipolar seesaw concept. We also show that when ice sheets are extensive, Antarctica does not necessarily warm during the whole GS as the thermal bipolar seesaw model would predict, questioning the Greenland ice core temperature records as a proxy for AMOC changes throughout the glacial period. © Author(s) 2010. |
format |
Text |
author |
Capron, E. Landais, A. Chappellaz, J. Schilt, A. Buiron, D. Dahl-Jensen, D. Johnsen, S. J. Jouzel, J. Lemieux-Dudon, B. Loulergue, L. Leuenberger, M. Masson-Delmotte, V. Meyer, H. Oerter, H. Stenni, B. |
spellingShingle |
Capron, E. Landais, A. Chappellaz, J. Schilt, A. Buiron, D. Dahl-Jensen, D. Johnsen, S. J. Jouzel, J. Lemieux-Dudon, B. Loulergue, L. Leuenberger, M. Masson-Delmotte, V. Meyer, H. Oerter, H. Stenni, B. Millennial and sub-millennial scale climatic variations recorded in polar ice cores over the last glacial period |
author_facet |
Capron, E. Landais, A. Chappellaz, J. Schilt, A. Buiron, D. Dahl-Jensen, D. Johnsen, S. J. Jouzel, J. Lemieux-Dudon, B. Loulergue, L. Leuenberger, M. Masson-Delmotte, V. Meyer, H. Oerter, H. Stenni, B. |
author_sort |
Capron, E. |
title |
Millennial and sub-millennial scale climatic variations recorded in polar ice cores over the last glacial period |
title_short |
Millennial and sub-millennial scale climatic variations recorded in polar ice cores over the last glacial period |
title_full |
Millennial and sub-millennial scale climatic variations recorded in polar ice cores over the last glacial period |
title_fullStr |
Millennial and sub-millennial scale climatic variations recorded in polar ice cores over the last glacial period |
title_full_unstemmed |
Millennial and sub-millennial scale climatic variations recorded in polar ice cores over the last glacial period |
title_sort |
millennial and sub-millennial scale climatic variations recorded in polar ice cores over the last glacial period |
publisher |
Gottingen, Copernicus GmbH |
publishDate |
2022 |
url |
https://doi.org/10.5194/cp-6-345-2010 https://infoscience.epfl.ch/record/298348/files/cp-6-345-2010.pdf http://infoscience.epfl.ch/record/298348 |
geographic |
Antarctic Dronning Maud Land Greenland |
geographic_facet |
Antarctic Dronning Maud Land Greenland |
genre |
Antarc* Antarctic Antarctica Dronning Maud Land EPICA Greenland Greenland ice core Greenland ice cores ice core |
genre_facet |
Antarc* Antarctic Antarctica Dronning Maud Land EPICA Greenland Greenland ice core Greenland ice cores ice core |
op_source |
http://infoscience.epfl.ch/record/298348 |
op_relation |
isi:000279390500006 doi:10.5194/cp-6-345-2010 https://infoscience.epfl.ch/record/298348/files/cp-6-345-2010.pdf http://infoscience.epfl.ch/record/298348 |
op_doi |
https://doi.org/10.5194/cp-6-345-2010 |
container_title |
Climate of the Past |
container_volume |
6 |
container_issue |
3 |
container_start_page |
345 |
op_container_end_page |
365 |
_version_ |
1766186850439921664 |