Model-data comparison of Antarctic winter sea-ice extent and Southern Ocean sea-surface temperatures during Marine Isotope Stage 5e
Marine Isotope Stage (MIS) 5e (130-116 ka) represents a ‘process analogue’ for future anthropogenic warming. Climate model simulations for MIS 5e have previously failed to produce Southern Ocean sea-surface temperatures (SST) and sea-ice extent reconstructed from marine sediment core proxy records....
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Online Access: | http://dx.doi.org/10.22541/essoar.167169856.67933699/v1 |
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crwinnower:10.22541/essoar.167169856.67933699/v1 2024-06-02T07:56:49+00:00 Model-data comparison of Antarctic winter sea-ice extent and Southern Ocean sea-surface temperatures during Marine Isotope Stage 5e Chadwick, Matthew Sime, Louise C Allen, Claire S Guarino, M- Vittoria 2022 http://dx.doi.org/10.22541/essoar.167169856.67933699/v1 unknown Authorea, Inc. posted-content 2022 crwinnower https://doi.org/10.22541/essoar.167169856.67933699/v1 2024-05-07T14:19:20Z Marine Isotope Stage (MIS) 5e (130-116 ka) represents a ‘process analogue’ for future anthropogenic warming. Climate model simulations for MIS 5e have previously failed to produce Southern Ocean sea-surface temperatures (SST) and sea-ice extent reconstructed from marine sediment core proxy records. Here we compare state of the art HadGEM3 and HadCM3 simulations of Peak MIS 5e Southern Ocean summer SST and September sea-ice concentrations with the latest marine sediment core proxy data. The model outputs and proxy records show the least consistency in the regions located near the present-day Southern Ocean gyre boundaries, implying that model simulations are currently unable to fully realise changes in gyre extent and position during MIS 5e. Including Heinrich 11 meltwater forcing in Peak MIS 5e climate simulations improves the likeness to proxy data but it is clear that longer (3-4 ka) run times are required to fully test the consistency between models and data. Other/Unknown Material Antarc* Antarctic Sea ice Southern Ocean The Winnower Antarctic Southern Ocean |
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Open Polar |
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The Winnower |
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crwinnower |
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description |
Marine Isotope Stage (MIS) 5e (130-116 ka) represents a ‘process analogue’ for future anthropogenic warming. Climate model simulations for MIS 5e have previously failed to produce Southern Ocean sea-surface temperatures (SST) and sea-ice extent reconstructed from marine sediment core proxy records. Here we compare state of the art HadGEM3 and HadCM3 simulations of Peak MIS 5e Southern Ocean summer SST and September sea-ice concentrations with the latest marine sediment core proxy data. The model outputs and proxy records show the least consistency in the regions located near the present-day Southern Ocean gyre boundaries, implying that model simulations are currently unable to fully realise changes in gyre extent and position during MIS 5e. Including Heinrich 11 meltwater forcing in Peak MIS 5e climate simulations improves the likeness to proxy data but it is clear that longer (3-4 ka) run times are required to fully test the consistency between models and data. |
format |
Other/Unknown Material |
author |
Chadwick, Matthew Sime, Louise C Allen, Claire S Guarino, M- Vittoria |
spellingShingle |
Chadwick, Matthew Sime, Louise C Allen, Claire S Guarino, M- Vittoria Model-data comparison of Antarctic winter sea-ice extent and Southern Ocean sea-surface temperatures during Marine Isotope Stage 5e |
author_facet |
Chadwick, Matthew Sime, Louise C Allen, Claire S Guarino, M- Vittoria |
author_sort |
Chadwick, Matthew |
title |
Model-data comparison of Antarctic winter sea-ice extent and Southern Ocean sea-surface temperatures during Marine Isotope Stage 5e |
title_short |
Model-data comparison of Antarctic winter sea-ice extent and Southern Ocean sea-surface temperatures during Marine Isotope Stage 5e |
title_full |
Model-data comparison of Antarctic winter sea-ice extent and Southern Ocean sea-surface temperatures during Marine Isotope Stage 5e |
title_fullStr |
Model-data comparison of Antarctic winter sea-ice extent and Southern Ocean sea-surface temperatures during Marine Isotope Stage 5e |
title_full_unstemmed |
Model-data comparison of Antarctic winter sea-ice extent and Southern Ocean sea-surface temperatures during Marine Isotope Stage 5e |
title_sort |
model-data comparison of antarctic winter sea-ice extent and southern ocean sea-surface temperatures during marine isotope stage 5e |
publisher |
Authorea, Inc. |
publishDate |
2022 |
url |
http://dx.doi.org/10.22541/essoar.167169856.67933699/v1 |
geographic |
Antarctic Southern Ocean |
geographic_facet |
Antarctic Southern Ocean |
genre |
Antarc* Antarctic Sea ice Southern Ocean |
genre_facet |
Antarc* Antarctic Sea ice Southern Ocean |
op_doi |
https://doi.org/10.22541/essoar.167169856.67933699/v1 |
_version_ |
1800759317341667328 |