Impacts of Antarctic Sea Ice, AMV and IPO on Extratropical Southern Hemisphere Climate: A Modeling Study
Some studies have discussed potential influences of Antarctic sea ice anomalies, Atlantic Multi-decadal Variability (AMV), and Interdecadal Pacific Oscillation (IPO) on the Southern Hemisphere (SH) climate, individually. However, it is not clear how different combinations of them influence the extra...
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ftdoajarticles:oai:doaj.org/article:d061f31226df42338d0b9926ee4751b3 2023-05-15T13:24:13+02:00 Impacts of Antarctic Sea Ice, AMV and IPO on Extratropical Southern Hemisphere Climate: A Modeling Study Zhu Zhu Jiping Liu Mirong Song Shaoyin Wang Yongyun Hu 2021-10-01T00:00:00Z https://doi.org/10.3389/feart.2021.757475 https://doaj.org/article/d061f31226df42338d0b9926ee4751b3 EN eng Frontiers Media S.A. https://www.frontiersin.org/articles/10.3389/feart.2021.757475/full https://doaj.org/toc/2296-6463 2296-6463 doi:10.3389/feart.2021.757475 https://doaj.org/article/d061f31226df42338d0b9926ee4751b3 Frontiers in Earth Science, Vol 9 (2021) extratropical Southern hemisphere Antarctic sea ice AMV IPO community atmosphere model Science Q article 2021 ftdoajarticles https://doi.org/10.3389/feart.2021.757475 2022-12-31T05:47:39Z Some studies have discussed potential influences of Antarctic sea ice anomalies, Atlantic Multi-decadal Variability (AMV), and Interdecadal Pacific Oscillation (IPO) on the Southern Hemisphere (SH) climate, individually. However, it is not clear how different combinations of them influence the extratropical SH climate. Here we select three different combinations of strong anomalies in Antarctic sea ice (SI), AMV and/or IPO identified from observations, and investigate their influence on the winter extratropical SH climate using the Community Atmosphere Model. The model results show that atmospheric responses vary with different combinations. When both SI and AMV are in strong positive polarity (SI + AMV), the polar jet shifts equatorward while the subtropical jet shifts poleward, the amplitude of zonal wave number 1 is reduced in high-latitudes with minimal changes in wave number 2, and a north-south circulation dipole occurs in both the Atlantic and Pacific. Different from SI + AMV, when SI is in strong positive polarity and IPO is in strong negative polarity (SI-IPO), the reduction of wave number 1 is dramatically increased, accompanied by remarkably increased wave number 2. The north-south circulation dipole only occurs in the Pacific and is confined to the central and eastern Pacific, whereas the Atlantic is dominated by anomalously anticyclonic circulation. Together, SI + AMV-IPO leads to the largest reduction of wave number 1 in high-latitudes and subtropics, the strongest north-south circulation dipole in the Pacific as well as the Amundsen Sea Low. As a result, the three combinations produce different patterns of surface temperature and precipitation anomalies over Antarctica, Australia and South America. Article in Journal/Newspaper Amundsen Sea Antarc* Antarctic Antarctica Sea ice Directory of Open Access Journals: DOAJ Articles Antarctic Amundsen Sea Pacific Frontiers in Earth Science 9 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
extratropical Southern hemisphere Antarctic sea ice AMV IPO community atmosphere model Science Q |
spellingShingle |
extratropical Southern hemisphere Antarctic sea ice AMV IPO community atmosphere model Science Q Zhu Zhu Jiping Liu Mirong Song Shaoyin Wang Yongyun Hu Impacts of Antarctic Sea Ice, AMV and IPO on Extratropical Southern Hemisphere Climate: A Modeling Study |
topic_facet |
extratropical Southern hemisphere Antarctic sea ice AMV IPO community atmosphere model Science Q |
description |
Some studies have discussed potential influences of Antarctic sea ice anomalies, Atlantic Multi-decadal Variability (AMV), and Interdecadal Pacific Oscillation (IPO) on the Southern Hemisphere (SH) climate, individually. However, it is not clear how different combinations of them influence the extratropical SH climate. Here we select three different combinations of strong anomalies in Antarctic sea ice (SI), AMV and/or IPO identified from observations, and investigate their influence on the winter extratropical SH climate using the Community Atmosphere Model. The model results show that atmospheric responses vary with different combinations. When both SI and AMV are in strong positive polarity (SI + AMV), the polar jet shifts equatorward while the subtropical jet shifts poleward, the amplitude of zonal wave number 1 is reduced in high-latitudes with minimal changes in wave number 2, and a north-south circulation dipole occurs in both the Atlantic and Pacific. Different from SI + AMV, when SI is in strong positive polarity and IPO is in strong negative polarity (SI-IPO), the reduction of wave number 1 is dramatically increased, accompanied by remarkably increased wave number 2. The north-south circulation dipole only occurs in the Pacific and is confined to the central and eastern Pacific, whereas the Atlantic is dominated by anomalously anticyclonic circulation. Together, SI + AMV-IPO leads to the largest reduction of wave number 1 in high-latitudes and subtropics, the strongest north-south circulation dipole in the Pacific as well as the Amundsen Sea Low. As a result, the three combinations produce different patterns of surface temperature and precipitation anomalies over Antarctica, Australia and South America. |
format |
Article in Journal/Newspaper |
author |
Zhu Zhu Jiping Liu Mirong Song Shaoyin Wang Yongyun Hu |
author_facet |
Zhu Zhu Jiping Liu Mirong Song Shaoyin Wang Yongyun Hu |
author_sort |
Zhu Zhu |
title |
Impacts of Antarctic Sea Ice, AMV and IPO on Extratropical Southern Hemisphere Climate: A Modeling Study |
title_short |
Impacts of Antarctic Sea Ice, AMV and IPO on Extratropical Southern Hemisphere Climate: A Modeling Study |
title_full |
Impacts of Antarctic Sea Ice, AMV and IPO on Extratropical Southern Hemisphere Climate: A Modeling Study |
title_fullStr |
Impacts of Antarctic Sea Ice, AMV and IPO on Extratropical Southern Hemisphere Climate: A Modeling Study |
title_full_unstemmed |
Impacts of Antarctic Sea Ice, AMV and IPO on Extratropical Southern Hemisphere Climate: A Modeling Study |
title_sort |
impacts of antarctic sea ice, amv and ipo on extratropical southern hemisphere climate: a modeling study |
publisher |
Frontiers Media S.A. |
publishDate |
2021 |
url |
https://doi.org/10.3389/feart.2021.757475 https://doaj.org/article/d061f31226df42338d0b9926ee4751b3 |
geographic |
Antarctic Amundsen Sea Pacific |
geographic_facet |
Antarctic Amundsen Sea Pacific |
genre |
Amundsen Sea Antarc* Antarctic Antarctica Sea ice |
genre_facet |
Amundsen Sea Antarc* Antarctic Antarctica Sea ice |
op_source |
Frontiers in Earth Science, Vol 9 (2021) |
op_relation |
https://www.frontiersin.org/articles/10.3389/feart.2021.757475/full https://doaj.org/toc/2296-6463 2296-6463 doi:10.3389/feart.2021.757475 https://doaj.org/article/d061f31226df42338d0b9926ee4751b3 |
op_doi |
https://doi.org/10.3389/feart.2021.757475 |
container_title |
Frontiers in Earth Science |
container_volume |
9 |
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1766378150378340352 |