Antarctic sea ice over the past 130 000 years – Part 1: a review of what proxy records tell us
Antarctic sea ice plays a critical role in the Earth system, influencing energy, heat and freshwater fluxes, air–sea gas exchange, ice shelf dynamics, ocean circulation, nutrient cycling, marine productivity and global carbon cycling. However, accurate simulation of recent sea-ice changes remains ch...
Published in: | Climate of the Past |
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ftoskarbordeaux:oai:oskar-bordeaux.fr:20.500.12278/170277 2023-05-15T13:39:15+02:00 Antarctic sea ice over the past 130 000 years – Part 1: a review of what proxy records tell us CROSTA, Xavier KOHFELD, Karen E BOSTOCK, Helen C CHADWICK, Matthew DU VIVIER, Alice ESPER, Oliver ETOURNEAU, Johan JONES, Jacob LEVENTER, Amy MÜLLER, Juliane RHODES, Rachael H ALLEN, Claire S GHADI, Pooja LAMPING, Nele LANGE, Carina B LAWLER, Kelly-Anne LUND, David MARZOCCHI, Alice MEISSNER, Katrin J MENVIEL, Laurie NAIR, Abhilash PATTERSON, Molly PIKE, Jennifer PREBBLE, Joseph G RIESSELMAN, Christina SADATZKI, Henrik SIME, Louise C SHUKLA, Sunil K THÖLE, Lena VORRATH, Maria-Elena XIAO, Wenshen YANG, Jiao 2022-08-02 https://oskar-bordeaux.fr/handle/20.500.12278/170277 https://hdl.handle.net/20.500.12278/170277 https://doi.org/10.5194/cp-18-1729-2022 EN eng 1814-9324 https://oskar-bordeaux.fr/handle/20.500.12278/170277 doi:10.5194/cp-18-1729-2022 Attribution 3.0 United States open http://creativecommons.org/licenses/by/3.0/us/ Pas de Licence CC CC-BY Sciences de l'environnement Article de revue 2022 ftoskarbordeaux https://doi.org/20.500.12278/170277 https://doi.org/10.5194/cp-18-1729-2022 2022-11-22T23:30:32Z Antarctic sea ice plays a critical role in the Earth system, influencing energy, heat and freshwater fluxes, air–sea gas exchange, ice shelf dynamics, ocean circulation, nutrient cycling, marine productivity and global carbon cycling. However, accurate simulation of recent sea-ice changes remains challenging and, therefore, projecting future sea-ice changes and their influence on the global climate system is uncertain. Reconstructing past changes in sea-ice cover can provide additional insights into climate feedbacks within the Earth system at different timescales. This paper is the first of two review papers from the Cycles of Sea Ice Dynamics in the Earth system (C-SIDE) working group. In this first paper, we review marine- and ice core-based sea-ice proxies and reconstructions of sea-ice changes throughout the last glacial–interglacial cycle. Antarctic sea-ice reconstructions rely mainly on diatom fossil assemblages and highly branched isoprenoid (HBI) alkenes in marine sediments, supported by chemical proxies in Antarctic ice cores. Most reconstructions for the Last Glacial Maximum (LGM) suggest that winter sea ice expanded all around Antarctica and covered almost twice its modern surface extent. In contrast, LGM summer sea ice expanded mainly in the regions off the Weddell and Ross seas. The difference between winter and summer sea ice during the LGM led to a larger seasonal cycle than today. More recent efforts have focused on reconstructing Antarctic sea ice during warm periods, such as the Holocene and the Last Interglacial (LIG), which may serve as an analogue for the future. Notwithstanding regional heterogeneities, existing reconstructions suggest that sea-ice cover increased from the warm mid-Holocene to the colder Late Holocene with pervasive decadal- to millennial-scale variability throughout the Holocene. Studies, supported by proxy modelling experiments, suggest that sea-ice cover was halved during the warmer LIG when global average temperatures were ∼2 ∘C above the pre-industrial (PI). There are ... Other/Unknown Material Antarc* Antarctic Antarctica ice core Ice Shelf Sea ice OSKAR Bordeaux (Open Science Knowledge ARchive) Antarctic Weddell Climate of the Past 18 8 1729 1756 |
institution |
Open Polar |
collection |
OSKAR Bordeaux (Open Science Knowledge ARchive) |
op_collection_id |
ftoskarbordeaux |
language |
English |
topic |
Sciences de l'environnement |
spellingShingle |
Sciences de l'environnement CROSTA, Xavier KOHFELD, Karen E BOSTOCK, Helen C CHADWICK, Matthew DU VIVIER, Alice ESPER, Oliver ETOURNEAU, Johan JONES, Jacob LEVENTER, Amy MÜLLER, Juliane RHODES, Rachael H ALLEN, Claire S GHADI, Pooja LAMPING, Nele LANGE, Carina B LAWLER, Kelly-Anne LUND, David MARZOCCHI, Alice MEISSNER, Katrin J MENVIEL, Laurie NAIR, Abhilash PATTERSON, Molly PIKE, Jennifer PREBBLE, Joseph G RIESSELMAN, Christina SADATZKI, Henrik SIME, Louise C SHUKLA, Sunil K THÖLE, Lena VORRATH, Maria-Elena XIAO, Wenshen YANG, Jiao Antarctic sea ice over the past 130 000 years – Part 1: a review of what proxy records tell us |
topic_facet |
Sciences de l'environnement |
description |
Antarctic sea ice plays a critical role in the Earth system, influencing energy, heat and freshwater fluxes, air–sea gas exchange, ice shelf dynamics, ocean circulation, nutrient cycling, marine productivity and global carbon cycling. However, accurate simulation of recent sea-ice changes remains challenging and, therefore, projecting future sea-ice changes and their influence on the global climate system is uncertain. Reconstructing past changes in sea-ice cover can provide additional insights into climate feedbacks within the Earth system at different timescales. This paper is the first of two review papers from the Cycles of Sea Ice Dynamics in the Earth system (C-SIDE) working group. In this first paper, we review marine- and ice core-based sea-ice proxies and reconstructions of sea-ice changes throughout the last glacial–interglacial cycle. Antarctic sea-ice reconstructions rely mainly on diatom fossil assemblages and highly branched isoprenoid (HBI) alkenes in marine sediments, supported by chemical proxies in Antarctic ice cores. Most reconstructions for the Last Glacial Maximum (LGM) suggest that winter sea ice expanded all around Antarctica and covered almost twice its modern surface extent. In contrast, LGM summer sea ice expanded mainly in the regions off the Weddell and Ross seas. The difference between winter and summer sea ice during the LGM led to a larger seasonal cycle than today. More recent efforts have focused on reconstructing Antarctic sea ice during warm periods, such as the Holocene and the Last Interglacial (LIG), which may serve as an analogue for the future. Notwithstanding regional heterogeneities, existing reconstructions suggest that sea-ice cover increased from the warm mid-Holocene to the colder Late Holocene with pervasive decadal- to millennial-scale variability throughout the Holocene. Studies, supported by proxy modelling experiments, suggest that sea-ice cover was halved during the warmer LIG when global average temperatures were ∼2 ∘C above the pre-industrial (PI). There are ... |
format |
Other/Unknown Material |
author |
CROSTA, Xavier KOHFELD, Karen E BOSTOCK, Helen C CHADWICK, Matthew DU VIVIER, Alice ESPER, Oliver ETOURNEAU, Johan JONES, Jacob LEVENTER, Amy MÜLLER, Juliane RHODES, Rachael H ALLEN, Claire S GHADI, Pooja LAMPING, Nele LANGE, Carina B LAWLER, Kelly-Anne LUND, David MARZOCCHI, Alice MEISSNER, Katrin J MENVIEL, Laurie NAIR, Abhilash PATTERSON, Molly PIKE, Jennifer PREBBLE, Joseph G RIESSELMAN, Christina SADATZKI, Henrik SIME, Louise C SHUKLA, Sunil K THÖLE, Lena VORRATH, Maria-Elena XIAO, Wenshen YANG, Jiao |
author_facet |
CROSTA, Xavier KOHFELD, Karen E BOSTOCK, Helen C CHADWICK, Matthew DU VIVIER, Alice ESPER, Oliver ETOURNEAU, Johan JONES, Jacob LEVENTER, Amy MÜLLER, Juliane RHODES, Rachael H ALLEN, Claire S GHADI, Pooja LAMPING, Nele LANGE, Carina B LAWLER, Kelly-Anne LUND, David MARZOCCHI, Alice MEISSNER, Katrin J MENVIEL, Laurie NAIR, Abhilash PATTERSON, Molly PIKE, Jennifer PREBBLE, Joseph G RIESSELMAN, Christina SADATZKI, Henrik SIME, Louise C SHUKLA, Sunil K THÖLE, Lena VORRATH, Maria-Elena XIAO, Wenshen YANG, Jiao |
author_sort |
CROSTA, Xavier |
title |
Antarctic sea ice over the past 130 000 years – Part 1: a review of what proxy records tell us |
title_short |
Antarctic sea ice over the past 130 000 years – Part 1: a review of what proxy records tell us |
title_full |
Antarctic sea ice over the past 130 000 years – Part 1: a review of what proxy records tell us |
title_fullStr |
Antarctic sea ice over the past 130 000 years – Part 1: a review of what proxy records tell us |
title_full_unstemmed |
Antarctic sea ice over the past 130 000 years – Part 1: a review of what proxy records tell us |
title_sort |
antarctic sea ice over the past 130 000 years – part 1: a review of what proxy records tell us |
publishDate |
2022 |
url |
https://oskar-bordeaux.fr/handle/20.500.12278/170277 https://hdl.handle.net/20.500.12278/170277 https://doi.org/10.5194/cp-18-1729-2022 |
geographic |
Antarctic Weddell |
geographic_facet |
Antarctic Weddell |
genre |
Antarc* Antarctic Antarctica ice core Ice Shelf Sea ice |
genre_facet |
Antarc* Antarctic Antarctica ice core Ice Shelf Sea ice |
op_relation |
1814-9324 https://oskar-bordeaux.fr/handle/20.500.12278/170277 doi:10.5194/cp-18-1729-2022 |
op_rights |
Attribution 3.0 United States open http://creativecommons.org/licenses/by/3.0/us/ Pas de Licence CC |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/20.500.12278/170277 https://doi.org/10.5194/cp-18-1729-2022 |
container_title |
Climate of the Past |
container_volume |
18 |
container_issue |
8 |
container_start_page |
1729 |
op_container_end_page |
1756 |
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1766116457835397120 |