Anthropogenic influence on recent circulation-driven Antarctic sea ice changes ...
Observations reveal an increase of Antarctic sea ice over the past three decades, yet global climate models tend to simulate a sea ice decrease for that period. Here we combine observations with model experiments (MPI-ESM) to investigate causes for this discrepancy and for the observed sea ice incre...
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Online Access: | https://dx.doi.org/10.3929/ethz-b-000094182 http://hdl.handle.net/20.500.11850/94182 |
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ftdatacite:10.3929/ethz-b-000094182 2024-04-28T07:59:47+00:00 Anthropogenic influence on recent circulation-driven Antarctic sea ice changes ... Haumann, Alexander Notz, Dirk Schmidt, Hauke 2014 application/pdf https://dx.doi.org/10.3929/ethz-b-000094182 http://hdl.handle.net/20.500.11850/94182 en eng ETH Zurich Antarctic Sea ice Climate change Anthropogenic Model Observations article-journal Text ScholarlyArticle Journal Article 2014 ftdatacite https://doi.org/10.3929/ethz-b-000094182 2024-04-02T12:32:08Z Observations reveal an increase of Antarctic sea ice over the past three decades, yet global climate models tend to simulate a sea ice decrease for that period. Here we combine observations with model experiments (MPI-ESM) to investigate causes for this discrepancy and for the observed sea ice increase. Based on observations and atmospheric reanalysis, we show that on multidecadal time scales Antarctic sea ice changes are linked to intensified meridional winds that are caused by a zonally asymmetric lowering of the high-latitude surface pressure. In our simulations, this surface pressure lowering is a response to a combination of anthropogenic stratospheric ozone depletion and greenhouse gas increase. Combining these two lines of argument, we infer a possible anthropogenic influence on the observed sea ice changes. However, similar to other models, MPI-ESM simulates a surface-pressure response that is rather zonally symmetric, which explains why the simulated sea ice response differs from observations. ... : Geophysical Research Letters, 41 (23) ... Article in Journal/Newspaper Antarc* Antarctic Sea ice DataCite Metadata Store (German National Library of Science and Technology) |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
topic |
Antarctic Sea ice Climate change Anthropogenic Model Observations |
spellingShingle |
Antarctic Sea ice Climate change Anthropogenic Model Observations Haumann, Alexander Notz, Dirk Schmidt, Hauke Anthropogenic influence on recent circulation-driven Antarctic sea ice changes ... |
topic_facet |
Antarctic Sea ice Climate change Anthropogenic Model Observations |
description |
Observations reveal an increase of Antarctic sea ice over the past three decades, yet global climate models tend to simulate a sea ice decrease for that period. Here we combine observations with model experiments (MPI-ESM) to investigate causes for this discrepancy and for the observed sea ice increase. Based on observations and atmospheric reanalysis, we show that on multidecadal time scales Antarctic sea ice changes are linked to intensified meridional winds that are caused by a zonally asymmetric lowering of the high-latitude surface pressure. In our simulations, this surface pressure lowering is a response to a combination of anthropogenic stratospheric ozone depletion and greenhouse gas increase. Combining these two lines of argument, we infer a possible anthropogenic influence on the observed sea ice changes. However, similar to other models, MPI-ESM simulates a surface-pressure response that is rather zonally symmetric, which explains why the simulated sea ice response differs from observations. ... : Geophysical Research Letters, 41 (23) ... |
format |
Article in Journal/Newspaper |
author |
Haumann, Alexander Notz, Dirk Schmidt, Hauke |
author_facet |
Haumann, Alexander Notz, Dirk Schmidt, Hauke |
author_sort |
Haumann, Alexander |
title |
Anthropogenic influence on recent circulation-driven Antarctic sea ice changes ... |
title_short |
Anthropogenic influence on recent circulation-driven Antarctic sea ice changes ... |
title_full |
Anthropogenic influence on recent circulation-driven Antarctic sea ice changes ... |
title_fullStr |
Anthropogenic influence on recent circulation-driven Antarctic sea ice changes ... |
title_full_unstemmed |
Anthropogenic influence on recent circulation-driven Antarctic sea ice changes ... |
title_sort |
anthropogenic influence on recent circulation-driven antarctic sea ice changes ... |
publisher |
ETH Zurich |
publishDate |
2014 |
url |
https://dx.doi.org/10.3929/ethz-b-000094182 http://hdl.handle.net/20.500.11850/94182 |
genre |
Antarc* Antarctic Sea ice |
genre_facet |
Antarc* Antarctic Sea ice |
op_doi |
https://doi.org/10.3929/ethz-b-000094182 |
_version_ |
1797572324156768256 |