Distorted Pacific–North American teleconnection at the Last Glacial Maximum
The Pacific–North American (PNA) teleconnection is one of the most important climate modes in the present climate condition, and it enables climate variations in the tropical Pacific to exert a significant influence on North America. Here, we show climate simulations in which the PNA teleconnection...
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fttriple:oai:gotriple.eu:qQ4dc8qOAr1-ojEo98TK_ 2023-05-15T16:40:47+02:00 Distorted Pacific–North American teleconnection at the Last Glacial Maximum Hu, Yongyun Xia, Yan Liu, Zhengyu Wang, Yuchen Lu, Zhengyao Wang, Tao 2020-01-23 https://doi.org/10.5194/cp-16-199-2020 https://cp.copernicus.org/articles/16/199/2020/ en eng Copernicus Publications doi:10.5194/cp-16-199-2020 10670/1.su12t7 1814-9324 1814-9332 https://cp.copernicus.org/articles/16/199/2020/ undefined Geographica Helvetica - geography eISSN: 1814-9332 anthro-bio envir Text https://vocabularies.coar-repositories.org/resource_types/c_18cf/ Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2020 fttriple https://doi.org/10.5194/cp-16-199-2020 2023-01-22T17:52:46Z The Pacific–North American (PNA) teleconnection is one of the most important climate modes in the present climate condition, and it enables climate variations in the tropical Pacific to exert a significant influence on North America. Here, we show climate simulations in which the PNA teleconnection was largely distorted or broken at the Last Glacial Maximum (LGM). The distorted PNA is caused by a split in the westerly jet stream, which is ultimately forced by the large, thick Laurentide ice sheet that was present at the LGM. Changes in the jet stream greatly alter the extratropical waveguide, distorting wave propagation from the North Pacific to North America. The distorted PNA suggests that climate variability in the tropical Pacific, notably El Niño–Southern Oscillation (ENSO), would have little direct impact on North American climate at the LGM. Article in Journal/Newspaper Ice Sheet Unknown Pacific Climate of the Past 16 1 199 209 |
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anthro-bio envir Hu, Yongyun Xia, Yan Liu, Zhengyu Wang, Yuchen Lu, Zhengyao Wang, Tao Distorted Pacific–North American teleconnection at the Last Glacial Maximum |
topic_facet |
anthro-bio envir |
description |
The Pacific–North American (PNA) teleconnection is one of the most important climate modes in the present climate condition, and it enables climate variations in the tropical Pacific to exert a significant influence on North America. Here, we show climate simulations in which the PNA teleconnection was largely distorted or broken at the Last Glacial Maximum (LGM). The distorted PNA is caused by a split in the westerly jet stream, which is ultimately forced by the large, thick Laurentide ice sheet that was present at the LGM. Changes in the jet stream greatly alter the extratropical waveguide, distorting wave propagation from the North Pacific to North America. The distorted PNA suggests that climate variability in the tropical Pacific, notably El Niño–Southern Oscillation (ENSO), would have little direct impact on North American climate at the LGM. |
format |
Article in Journal/Newspaper |
author |
Hu, Yongyun Xia, Yan Liu, Zhengyu Wang, Yuchen Lu, Zhengyao Wang, Tao |
author_facet |
Hu, Yongyun Xia, Yan Liu, Zhengyu Wang, Yuchen Lu, Zhengyao Wang, Tao |
author_sort |
Hu, Yongyun |
title |
Distorted Pacific–North American teleconnection at the Last Glacial Maximum |
title_short |
Distorted Pacific–North American teleconnection at the Last Glacial Maximum |
title_full |
Distorted Pacific–North American teleconnection at the Last Glacial Maximum |
title_fullStr |
Distorted Pacific–North American teleconnection at the Last Glacial Maximum |
title_full_unstemmed |
Distorted Pacific–North American teleconnection at the Last Glacial Maximum |
title_sort |
distorted pacific–north american teleconnection at the last glacial maximum |
publisher |
Copernicus Publications |
publishDate |
2020 |
url |
https://doi.org/10.5194/cp-16-199-2020 https://cp.copernicus.org/articles/16/199/2020/ |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_source |
Geographica Helvetica - geography eISSN: 1814-9332 |
op_relation |
doi:10.5194/cp-16-199-2020 10670/1.su12t7 1814-9324 1814-9332 https://cp.copernicus.org/articles/16/199/2020/ |
op_rights |
undefined |
op_doi |
https://doi.org/10.5194/cp-16-199-2020 |
container_title |
Climate of the Past |
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16 |
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1 |
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199 |
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209 |
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1766031206766346240 |