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spelling ftceafr:oai:HAL:hal-04115212v1 2024-06-09T07:40:39+00:00 Climate dependent contrast in surface mass balance in East Antarctica over the past 216 kyr Parrenin, F. Fujita, S. Abe-Ouchi, A. Kawamura, K. Masson-Delmotte, Valérie Motoyama, H. Saito, F. Severi, M. Stenni, B. Uemura, R. Wolff, E. Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE) Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)) Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA) 2023-06-02 https://hal.science/hal-04115212 https://doi.org/10.5194/cpd-11-377-2015 en eng HAL CCSD info:eu-repo/semantics/altIdentifier/doi/10.5194/cpd-11-377-2015 hal-04115212 https://hal.science/hal-04115212 BIBCODE: 2015CliPD.11.377P doi:10.5194/cpd-11-377-2015 https://hal.science/hal-04115212 2023 [SDU]Sciences of the Universe [physics] info:eu-repo/semantics/preprint Preprints, Working Papers, . 2023 ftceafr https://doi.org/10.5194/cpd-11-377-2015 2024-05-16T13:33:53Z International audience 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. Here we reconstruct the 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 synchronisation of the two ice cores and on corrections for the vertical thinning of layers. During the past 216 000 years, this SMB ratio, denoted SMB EDC /SMB DF , varied between 0.7 and 1.1, decreasing during cold periods and increasing during warm periods. While past climatic changes have been depicted as homogeneous along the East Antarctic Plateau, our results reveal larger amplitudes of changes in SMB at EDC compared to DF, consistent with previous results showing larger amplitudes of changes in water stable isotopes and estimated surface temperature at EDC compared to DF. Within interglacial periods and during the last glacial inception (Marine Isotope Stages, MIS-5c and MIS-5d), the SMB ratio deviates by up to 30% 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. These SMB ratio changes not closely related to isotopic changes are one of the possible causes of the observed gaps between the ice core chronologies at DF and EDC. Such changes in SMB ratio may have been caused by (i) climatic processes related to changes in air mass trajectories and local climate, (ii) glaciological processes associated with relative elevation changes, or (iii) a combination of climatic and glaciological processes, such as the interaction between changes in accumulation and in the position of the domes. Our inferred SMB ratio history has important implications for ice sheet modeling (for which SMB is a boundary condition) or atmospheric modeling (our inferred ... Report Antarc* Antarctic Antarctica East Antarctica EPICA ice core Ice Sheet HAL-CEA (Commissariat à l'énergie atomique et aux énergies alternatives) Antarctic East Antarctica Dome Fuji ENVELOPE(39.700,39.700,-77.317,-77.317)
institution Open Polar
collection HAL-CEA (Commissariat à l'énergie atomique et aux énergies alternatives)
op_collection_id ftceafr
language English
topic [SDU]Sciences of the Universe [physics]
spellingShingle [SDU]Sciences of the Universe [physics]
Parrenin, F.
Fujita, S.
Abe-Ouchi, A.
Kawamura, K.
Masson-Delmotte, Valérie
Motoyama, H.
Saito, F.
Severi, M.
Stenni, B.
Uemura, R.
Wolff, E.
Climate dependent contrast in surface mass balance in East Antarctica over the past 216 kyr
topic_facet [SDU]Sciences of the Universe [physics]
description International audience 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. Here we reconstruct the 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 synchronisation of the two ice cores and on corrections for the vertical thinning of layers. During the past 216 000 years, this SMB ratio, denoted SMB EDC /SMB DF , varied between 0.7 and 1.1, decreasing during cold periods and increasing during warm periods. While past climatic changes have been depicted as homogeneous along the East Antarctic Plateau, our results reveal larger amplitudes of changes in SMB at EDC compared to DF, consistent with previous results showing larger amplitudes of changes in water stable isotopes and estimated surface temperature at EDC compared to DF. Within interglacial periods and during the last glacial inception (Marine Isotope Stages, MIS-5c and MIS-5d), the SMB ratio deviates by up to 30% 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. These SMB ratio changes not closely related to isotopic changes are one of the possible causes of the observed gaps between the ice core chronologies at DF and EDC. Such changes in SMB ratio may have been caused by (i) climatic processes related to changes in air mass trajectories and local climate, (ii) glaciological processes associated with relative elevation changes, or (iii) a combination of climatic and glaciological processes, such as the interaction between changes in accumulation and in the position of the domes. Our inferred SMB ratio history has important implications for ice sheet modeling (for which SMB is a boundary condition) or atmospheric modeling (our inferred ...
author2 Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE)
Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA))
Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)
format Report
author Parrenin, F.
Fujita, S.
Abe-Ouchi, A.
Kawamura, K.
Masson-Delmotte, Valérie
Motoyama, H.
Saito, F.
Severi, M.
Stenni, B.
Uemura, R.
Wolff, E.
author_facet Parrenin, F.
Fujita, S.
Abe-Ouchi, A.
Kawamura, K.
Masson-Delmotte, Valérie
Motoyama, H.
Saito, F.
Severi, M.
Stenni, B.
Uemura, R.
Wolff, E.
author_sort Parrenin, F.
title Climate dependent contrast in surface mass balance in East Antarctica over the past 216 kyr
title_short Climate dependent contrast in surface mass balance in East Antarctica over the past 216 kyr
title_full Climate dependent contrast in surface mass balance in East Antarctica over the past 216 kyr
title_fullStr Climate dependent contrast in surface mass balance in East Antarctica over the past 216 kyr
title_full_unstemmed Climate dependent contrast in surface mass balance in East Antarctica over the past 216 kyr
title_sort climate dependent contrast in surface mass balance in east antarctica over the past 216 kyr
publisher HAL CCSD
publishDate 2023
url https://hal.science/hal-04115212
https://doi.org/10.5194/cpd-11-377-2015
long_lat ENVELOPE(39.700,39.700,-77.317,-77.317)
geographic Antarctic
East Antarctica
Dome Fuji
geographic_facet Antarctic
East Antarctica
Dome Fuji
genre Antarc*
Antarctic
Antarctica
East Antarctica
EPICA
ice core
Ice Sheet
genre_facet Antarc*
Antarctic
Antarctica
East Antarctica
EPICA
ice core
Ice Sheet
op_source https://hal.science/hal-04115212
2023
op_relation info:eu-repo/semantics/altIdentifier/doi/10.5194/cpd-11-377-2015
hal-04115212
https://hal.science/hal-04115212
BIBCODE: 2015CliPD.11.377P
doi:10.5194/cpd-11-377-2015
op_doi https://doi.org/10.5194/cpd-11-377-2015
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