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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ftdoajarticles:oai:doaj.org/article:0eac6a6de6b34b8f8d73feb0b5dbbc2c 2023-05-15T16:40:49+02:00 Distorted Pacific–North American teleconnection at the Last Glacial Maximum Y. Hu Y. Xia Z. Liu Y. Wang Z. Lu T. Wang 2020-01-01T00:00:00Z https://doi.org/10.5194/cp-16-199-2020 https://doaj.org/article/0eac6a6de6b34b8f8d73feb0b5dbbc2c EN eng Copernicus Publications https://www.clim-past.net/16/199/2020/cp-16-199-2020.pdf https://doaj.org/toc/1814-9324 https://doaj.org/toc/1814-9332 doi:10.5194/cp-16-199-2020 1814-9324 1814-9332 https://doaj.org/article/0eac6a6de6b34b8f8d73feb0b5dbbc2c Climate of the Past, Vol 16, Pp 199-209 (2020) Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 article 2020 ftdoajarticles https://doi.org/10.5194/cp-16-199-2020 2022-12-30T22:41:39Z 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 Directory of Open Access Journals: DOAJ Articles Pacific Climate of the Past 16 1 199 209 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 |
spellingShingle |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 Y. Hu Y. Xia Z. Liu Y. Wang Z. Lu T. Wang Distorted Pacific–North American teleconnection at the Last Glacial Maximum |
topic_facet |
Environmental pollution TD172-193.5 Environmental protection TD169-171.8 Environmental sciences GE1-350 |
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 |
Y. Hu Y. Xia Z. Liu Y. Wang Z. Lu T. Wang |
author_facet |
Y. Hu Y. Xia Z. Liu Y. Wang Z. Lu T. Wang |
author_sort |
Y. Hu |
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://doaj.org/article/0eac6a6de6b34b8f8d73feb0b5dbbc2c |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_source |
Climate of the Past, Vol 16, Pp 199-209 (2020) |
op_relation |
https://www.clim-past.net/16/199/2020/cp-16-199-2020.pdf https://doaj.org/toc/1814-9324 https://doaj.org/toc/1814-9332 doi:10.5194/cp-16-199-2020 1814-9324 1814-9332 https://doaj.org/article/0eac6a6de6b34b8f8d73feb0b5dbbc2c |
op_doi |
https://doi.org/10.5194/cp-16-199-2020 |
container_title |
Climate of the Past |
container_volume |
16 |
container_issue |
1 |
container_start_page |
199 |
op_container_end_page |
209 |
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1766031237027201024 |