Climate dependent contrast in surface mass balance in East Antarctica over the past 216 ka
<jats:title>ABSTRACT</jats:title><jats:p>Documenting past changes in the East Antarctic surface mass balance is important to improve ice core chronologies and to constrain the ice-sheet contribution to global mean sea-level change. Here we reconstruct past changes in the ratio of s...
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ftunivcam:oai:www.repository.cam.ac.uk:1810/256597 2024-02-04T09:55:38+01:00 Climate dependent contrast in surface mass balance in East Antarctica over the past 216 ka Parrenin, F Fujita, S Abe-Ouchi, A Kawamura, K Masson-Delmotte, V Motoyama, H Saito, F Severi, M Stenni, B Uemura, R Wolff, EW 2016 application/pdf https://www.repository.cam.ac.uk/handle/1810/256597 https://doi.org/10.17863/CAM.535 English eng eng Cambridge University Press (CUP) http://dx.doi.org/10.1017/jog.2016.85 Journal of Glaciology https://www.repository.cam.ac.uk/handle/1810/256597 doi:10.17863/CAM.535 Attribution 4.0 International http://creativecommons.org/licenses/by/4.0/ ice cores surface mass balance vertical thinning volcanic synchronization Article 2016 ftunivcam https://doi.org/10.17863/CAM.535 2024-01-11T23:19:53Z <jats:title>ABSTRACT</jats:title><jats:p>Documenting past changes in the East Antarctic surface mass balance is important to improve ice core chronologies and to constrain the ice-sheet contribution to global mean sea-level change. Here we reconstruct past changes in the ratio of surface mass balance (SMB ratio) between the EPICA Dome C (EDC) and Dome Fuji (DF) East Antarctica ice core sites, based on a precise volcanic synchronization of the two ice cores and on corrections for the vertical thinning of layers. During the past 216 000 a, this SMB ratio, denoted SMB<jats:sub>EDC</jats:sub>/SMB<jats:sub>DF</jats:sub>, varied between 0.7 and 1.1, being small during cold periods and large during warm periods. Our results therefore reveal larger amplitudes of changes in SMB at EDC compared with DF, consistent with previous results showing larger amplitudes of changes in water stable isotopes and estimated surface temperature at EDC compared with DF. Within the last glacial inception (Marine Isotope Stages, MIS-5c and MIS-5d), the SMB ratio deviates by up to 0.2 from what is expected based on differences in water stable isotope records. Moreover, the SMB ratio is constant throughout the late parts of the current and last interglacial periods, despite contrasting isotopic trends.</jats:p> This is the accepted manuscript. It is currently embargoed pending publication. Article in Journal/Newspaper Antarc* Antarctic Antarctica East Antarctica EPICA ice core Ice Sheet Apollo - University of Cambridge Repository Antarctic Dome Fuji ENVELOPE(39.700,39.700,-77.317,-77.317) East Antarctica |
institution |
Open Polar |
collection |
Apollo - University of Cambridge Repository |
op_collection_id |
ftunivcam |
language |
English |
topic |
ice cores surface mass balance vertical thinning volcanic synchronization |
spellingShingle |
ice cores surface mass balance vertical thinning volcanic synchronization Parrenin, F Fujita, S Abe-Ouchi, A Kawamura, K Masson-Delmotte, V Motoyama, H Saito, F Severi, M Stenni, B Uemura, R Wolff, EW Climate dependent contrast in surface mass balance in East Antarctica over the past 216 ka |
topic_facet |
ice cores surface mass balance vertical thinning volcanic synchronization |
description |
<jats:title>ABSTRACT</jats:title><jats:p>Documenting past changes in the East Antarctic surface mass balance is important to improve ice core chronologies and to constrain the ice-sheet contribution to global mean sea-level change. Here we reconstruct past changes in the ratio of surface mass balance (SMB ratio) between the EPICA Dome C (EDC) and Dome Fuji (DF) East Antarctica ice core sites, based on a precise volcanic synchronization of the two ice cores and on corrections for the vertical thinning of layers. During the past 216 000 a, this SMB ratio, denoted SMB<jats:sub>EDC</jats:sub>/SMB<jats:sub>DF</jats:sub>, varied between 0.7 and 1.1, being small during cold periods and large during warm periods. Our results therefore reveal larger amplitudes of changes in SMB at EDC compared with DF, consistent with previous results showing larger amplitudes of changes in water stable isotopes and estimated surface temperature at EDC compared with DF. Within the last glacial inception (Marine Isotope Stages, MIS-5c and MIS-5d), the SMB ratio deviates by up to 0.2 from what is expected based on differences in water stable isotope records. Moreover, the SMB ratio is constant throughout the late parts of the current and last interglacial periods, despite contrasting isotopic trends.</jats:p> This is the accepted manuscript. It is currently embargoed pending publication. |
format |
Article in Journal/Newspaper |
author |
Parrenin, F Fujita, S Abe-Ouchi, A Kawamura, K Masson-Delmotte, V Motoyama, H Saito, F Severi, M Stenni, B Uemura, R Wolff, EW |
author_facet |
Parrenin, F Fujita, S Abe-Ouchi, A Kawamura, K Masson-Delmotte, V Motoyama, H Saito, F Severi, M Stenni, B Uemura, R Wolff, EW |
author_sort |
Parrenin, F |
title |
Climate dependent contrast in surface mass balance in East Antarctica over the past 216 ka |
title_short |
Climate dependent contrast in surface mass balance in East Antarctica over the past 216 ka |
title_full |
Climate dependent contrast in surface mass balance in East Antarctica over the past 216 ka |
title_fullStr |
Climate dependent contrast in surface mass balance in East Antarctica over the past 216 ka |
title_full_unstemmed |
Climate dependent contrast in surface mass balance in East Antarctica over the past 216 ka |
title_sort |
climate dependent contrast in surface mass balance in east antarctica over the past 216 ka |
publisher |
Cambridge University Press (CUP) |
publishDate |
2016 |
url |
https://www.repository.cam.ac.uk/handle/1810/256597 https://doi.org/10.17863/CAM.535 |
long_lat |
ENVELOPE(39.700,39.700,-77.317,-77.317) |
geographic |
Antarctic Dome Fuji East Antarctica |
geographic_facet |
Antarctic Dome Fuji East Antarctica |
genre |
Antarc* Antarctic Antarctica East Antarctica EPICA ice core Ice Sheet |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica EPICA ice core Ice Sheet |
op_relation |
https://www.repository.cam.ac.uk/handle/1810/256597 doi:10.17863/CAM.535 |
op_rights |
Attribution 4.0 International http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.17863/CAM.535 |
_version_ |
1789959705606488064 |