The deuterium excess records of EPICA Dome C and Dronning Maud Land ice cores (East Antarctica)
New high-resolution deuterium excess (d) data from the two EPICA ice cores drilled in Dronning Maud Land (EDML) and Dome C (EDC) are presented here. The main moisture sources for precipitation at EDC and EDML are located in the Indian Ocean and Atlantic Ocean, respectively. The more southward moistu...
Published in: | Quaternary Science Reviews |
---|---|
Main Authors: | , , , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Pergamon
2010
|
Subjects: | |
Online Access: | https://boris.unibe.ch/4608/1/1-s2.0-S0277379109003540-main.pdf https://boris.unibe.ch/4608/ |
id |
ftunivbern:oai:boris.unibe.ch:4608 |
---|---|
record_format |
openpolar |
spelling |
ftunivbern:oai:boris.unibe.ch:4608 2023-08-20T04:01:19+02:00 The deuterium excess records of EPICA Dome C and Dronning Maud Land ice cores (East Antarctica) Stenni, B. Masson-Delmotte, V. Selmo, E. Oerter, H. Meyer, H. Röthlisberger, R. Jouzel, J. Cattani, O. Falourd, S. Fischer, H. Hoffmann, G. Iacumin, P. Johnsen, S.J. Minster, B. Udisti, R. 2010 application/pdf https://boris.unibe.ch/4608/1/1-s2.0-S0277379109003540-main.pdf https://boris.unibe.ch/4608/ eng eng Pergamon https://boris.unibe.ch/4608/ info:eu-repo/semantics/restrictedAccess Stenni, B.; Masson-Delmotte, V.; Selmo, E.; Oerter, H.; Meyer, H.; Röthlisberger, R.; Jouzel, J.; Cattani, O.; Falourd, S.; Fischer, H.; Hoffmann, G.; Iacumin, P.; Johnsen, S.J.; Minster, B.; Udisti, R. (2010). The deuterium excess records of EPICA Dome C and Dronning Maud Land ice cores (East Antarctica). Quaternary Science Reviews, 29(1-2), pp. 146-159. Oxford: Pergamon 10.1016/j.quascirev.2009.10.009 <http://dx.doi.org/10.1016/j.quascirev.2009.10.009> 530 Physics info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion PeerReviewed 2010 ftunivbern https://doi.org/10.1016/j.quascirev.2009.10.009 2023-07-31T20:27:00Z New high-resolution deuterium excess (d) data from the two EPICA ice cores drilled in Dronning Maud Land (EDML) and Dome C (EDC) are presented here. The main moisture sources for precipitation at EDC and EDML are located in the Indian Ocean and Atlantic Ocean, respectively. The more southward moisture origin for EDML is reflected in a lower present-day d value, compared to EDC. The EDML and EDC isotopic records (δ18O and d) show the main climate features common to the East Antarctic plateau and similar millennial scale climate variability during the last glacial period. However, quite large δ18O and d differences are observed during MIS5.5 and the glacial inception with a long-term behaviour. A possibility for this long-term difference could be related to uncertainties in past accumulation rate which are used in the glaciological models. Regional climate anomalies between the two sites during MIS5.5 could also be consistent with the observed EDML-EDC δ18O and d gradient anomalies. Simulations performed with the General Circulation Model ECHAM4 for different time slices provide a temporal temperature/isotope slope for the EDML region in fair agreement to the modern spatial slope. Tsite and Tsource records are extracted from both ice cores, using a modelling approach, after corrections for past δ18O seawater and elevation changes. A limited impact of d on Antarctic temperature reconstruction at both EDML and EDC has been found with a higher impact only at glacial inception. The AIM (Antarctic Isotope Maximum) events in both ice cores are visible also after the source correction, suggesting that these are real climate features of the glacial period. The different shape of the AIM events between EDC and EDML, as well as some climate features in the early Holocene, points to a slightly different climate evolution at regional scale. A comparison of our temperature reconstruction profiles with the aerosol fluxes show a strong coupling of the nssCa fluxes with Antarctic temperatures during glacial period and a tighter ... Article in Journal/Newspaper Antarc* Antarctic Antarctica Dronning Maud Land East Antarctica EPICA BORIS (Bern Open Repository and Information System, University of Bern) Antarctic Dronning Maud Land East Antarctica Indian Quaternary Science Reviews 29 1-2 146 159 |
institution |
Open Polar |
collection |
BORIS (Bern Open Repository and Information System, University of Bern) |
op_collection_id |
ftunivbern |
language |
English |
topic |
530 Physics |
spellingShingle |
530 Physics Stenni, B. Masson-Delmotte, V. Selmo, E. Oerter, H. Meyer, H. Röthlisberger, R. Jouzel, J. Cattani, O. Falourd, S. Fischer, H. Hoffmann, G. Iacumin, P. Johnsen, S.J. Minster, B. Udisti, R. The deuterium excess records of EPICA Dome C and Dronning Maud Land ice cores (East Antarctica) |
topic_facet |
530 Physics |
description |
New high-resolution deuterium excess (d) data from the two EPICA ice cores drilled in Dronning Maud Land (EDML) and Dome C (EDC) are presented here. The main moisture sources for precipitation at EDC and EDML are located in the Indian Ocean and Atlantic Ocean, respectively. The more southward moisture origin for EDML is reflected in a lower present-day d value, compared to EDC. The EDML and EDC isotopic records (δ18O and d) show the main climate features common to the East Antarctic plateau and similar millennial scale climate variability during the last glacial period. However, quite large δ18O and d differences are observed during MIS5.5 and the glacial inception with a long-term behaviour. A possibility for this long-term difference could be related to uncertainties in past accumulation rate which are used in the glaciological models. Regional climate anomalies between the two sites during MIS5.5 could also be consistent with the observed EDML-EDC δ18O and d gradient anomalies. Simulations performed with the General Circulation Model ECHAM4 for different time slices provide a temporal temperature/isotope slope for the EDML region in fair agreement to the modern spatial slope. Tsite and Tsource records are extracted from both ice cores, using a modelling approach, after corrections for past δ18O seawater and elevation changes. A limited impact of d on Antarctic temperature reconstruction at both EDML and EDC has been found with a higher impact only at glacial inception. The AIM (Antarctic Isotope Maximum) events in both ice cores are visible also after the source correction, suggesting that these are real climate features of the glacial period. The different shape of the AIM events between EDC and EDML, as well as some climate features in the early Holocene, points to a slightly different climate evolution at regional scale. A comparison of our temperature reconstruction profiles with the aerosol fluxes show a strong coupling of the nssCa fluxes with Antarctic temperatures during glacial period and a tighter ... |
format |
Article in Journal/Newspaper |
author |
Stenni, B. Masson-Delmotte, V. Selmo, E. Oerter, H. Meyer, H. Röthlisberger, R. Jouzel, J. Cattani, O. Falourd, S. Fischer, H. Hoffmann, G. Iacumin, P. Johnsen, S.J. Minster, B. Udisti, R. |
author_facet |
Stenni, B. Masson-Delmotte, V. Selmo, E. Oerter, H. Meyer, H. Röthlisberger, R. Jouzel, J. Cattani, O. Falourd, S. Fischer, H. Hoffmann, G. Iacumin, P. Johnsen, S.J. Minster, B. Udisti, R. |
author_sort |
Stenni, B. |
title |
The deuterium excess records of EPICA Dome C and Dronning Maud Land ice cores (East Antarctica) |
title_short |
The deuterium excess records of EPICA Dome C and Dronning Maud Land ice cores (East Antarctica) |
title_full |
The deuterium excess records of EPICA Dome C and Dronning Maud Land ice cores (East Antarctica) |
title_fullStr |
The deuterium excess records of EPICA Dome C and Dronning Maud Land ice cores (East Antarctica) |
title_full_unstemmed |
The deuterium excess records of EPICA Dome C and Dronning Maud Land ice cores (East Antarctica) |
title_sort |
deuterium excess records of epica dome c and dronning maud land ice cores (east antarctica) |
publisher |
Pergamon |
publishDate |
2010 |
url |
https://boris.unibe.ch/4608/1/1-s2.0-S0277379109003540-main.pdf https://boris.unibe.ch/4608/ |
geographic |
Antarctic Dronning Maud Land East Antarctica Indian |
geographic_facet |
Antarctic Dronning Maud Land East Antarctica Indian |
genre |
Antarc* Antarctic Antarctica Dronning Maud Land East Antarctica EPICA |
genre_facet |
Antarc* Antarctic Antarctica Dronning Maud Land East Antarctica EPICA |
op_source |
Stenni, B.; Masson-Delmotte, V.; Selmo, E.; Oerter, H.; Meyer, H.; Röthlisberger, R.; Jouzel, J.; Cattani, O.; Falourd, S.; Fischer, H.; Hoffmann, G.; Iacumin, P.; Johnsen, S.J.; Minster, B.; Udisti, R. (2010). The deuterium excess records of EPICA Dome C and Dronning Maud Land ice cores (East Antarctica). Quaternary Science Reviews, 29(1-2), pp. 146-159. Oxford: Pergamon 10.1016/j.quascirev.2009.10.009 <http://dx.doi.org/10.1016/j.quascirev.2009.10.009> |
op_relation |
https://boris.unibe.ch/4608/ |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1016/j.quascirev.2009.10.009 |
container_title |
Quaternary Science Reviews |
container_volume |
29 |
container_issue |
1-2 |
container_start_page |
146 |
op_container_end_page |
159 |
_version_ |
1774724334506475520 |