A zonally-oriented teleconnection pattern induced by heating of the western Tibetan Plateau in boreal summer
Abstract The thermal effect of the Tibetan Plateau (TP) on the northern hemisphere climate has long been a hot topic of scientific research. However, the global effects of the TP heat source are still unclear. We investigate the teleconnection patterns coincident with the TP heat source in boreal su...
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Online Access: | http://dx.doi.org/10.1007/s00382-021-05841-6 https://link.springer.com/content/pdf/10.1007/s00382-021-05841-6.pdf https://link.springer.com/article/10.1007/s00382-021-05841-6/fulltext.html |
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crspringernat:10.1007/s00382-021-05841-6 2023-05-15T15:43:59+02:00 A zonally-oriented teleconnection pattern induced by heating of the western Tibetan Plateau in boreal summer Li, Qingquan Zhao, Mengchu Yang, Song Shen, Xinyong Dong, Lili Liu, Zhaodong the Strategic Priority Research Program of the Chinese Academy of Sciences the Second Tibetan Plateau Scientific Expedition and Research Program of China the National Natural Science Foundation of China the National Key Research and Development Program of China Guangdong Province Key Laboratory for Climate Change and Natural Disaster Studies 2021 http://dx.doi.org/10.1007/s00382-021-05841-6 https://link.springer.com/content/pdf/10.1007/s00382-021-05841-6.pdf https://link.springer.com/article/10.1007/s00382-021-05841-6/fulltext.html en eng Springer Science and Business Media LLC https://creativecommons.org/licenses/by/4.0 https://creativecommons.org/licenses/by/4.0 CC-BY Climate Dynamics volume 57, issue 9-10, page 2823-2842 ISSN 0930-7575 1432-0894 Atmospheric Science journal-article 2021 crspringernat https://doi.org/10.1007/s00382-021-05841-6 2022-01-04T14:25:53Z Abstract The thermal effect of the Tibetan Plateau (TP) on the northern hemisphere climate has long been a hot topic of scientific research. However, the global effects of the TP heat source are still unclear. We investigate the teleconnection patterns coincident with the TP heat source in boreal summer using both observational data and numerical models including a linearized baroclinic model and an atmospheric general circulation model. The western TP shows the most intense variability in atmospheric heating and the most active connection to atmospheric circulations. The surface sensible heating component of the western TP heat source is associated with a high-latitude wave train propagating from North Japan to central North America through the Bering Sea and Canada. The radiative heating component is accompanied by a wavenumber-4 wave train over Eurasia. We focus on the global zonally-oriented pattern that is connected with the latent heat release from the western TP, referred to here as the TP–circumglobal teleconnection (TP-CGT). The TP-CGT pattern is triggered by the western TP latent heating in two parts starting from the TP: an eastward-propagating wave train trapped in the westerly jet stream and a westward Rossby wave response. The TP-CGT accounts for above 18% of the total variance of the circumglobal teleconnection pattern and modulates mid-latitude precipitation by superimposition. The western TP is the key region in which diabatic heating can initiate the two atmospheric responses concurrently, and the heating over northeastern Asia or the Indian Peninsula is unable to induce the circumglobal pattern directly. The unique geographical location and strong tropospheric heating also make the western TP as a “transit area” of transferring the indirect impact of the Indian summer monsoon (ISM) to the TP-CGT. These results enhance our understanding of the relationship between the circumglobal teleconnection and the ISM and is helpful for improving the prediction of the circumglobal teleconnection variability. Article in Journal/Newspaper Bering Sea Springer Nature (via Crossref) Bering Sea Canada Indian Climate Dynamics |
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Open Polar |
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Springer Nature (via Crossref) |
op_collection_id |
crspringernat |
language |
English |
topic |
Atmospheric Science |
spellingShingle |
Atmospheric Science Li, Qingquan Zhao, Mengchu Yang, Song Shen, Xinyong Dong, Lili Liu, Zhaodong A zonally-oriented teleconnection pattern induced by heating of the western Tibetan Plateau in boreal summer |
topic_facet |
Atmospheric Science |
description |
Abstract The thermal effect of the Tibetan Plateau (TP) on the northern hemisphere climate has long been a hot topic of scientific research. However, the global effects of the TP heat source are still unclear. We investigate the teleconnection patterns coincident with the TP heat source in boreal summer using both observational data and numerical models including a linearized baroclinic model and an atmospheric general circulation model. The western TP shows the most intense variability in atmospheric heating and the most active connection to atmospheric circulations. The surface sensible heating component of the western TP heat source is associated with a high-latitude wave train propagating from North Japan to central North America through the Bering Sea and Canada. The radiative heating component is accompanied by a wavenumber-4 wave train over Eurasia. We focus on the global zonally-oriented pattern that is connected with the latent heat release from the western TP, referred to here as the TP–circumglobal teleconnection (TP-CGT). The TP-CGT pattern is triggered by the western TP latent heating in two parts starting from the TP: an eastward-propagating wave train trapped in the westerly jet stream and a westward Rossby wave response. The TP-CGT accounts for above 18% of the total variance of the circumglobal teleconnection pattern and modulates mid-latitude precipitation by superimposition. The western TP is the key region in which diabatic heating can initiate the two atmospheric responses concurrently, and the heating over northeastern Asia or the Indian Peninsula is unable to induce the circumglobal pattern directly. The unique geographical location and strong tropospheric heating also make the western TP as a “transit area” of transferring the indirect impact of the Indian summer monsoon (ISM) to the TP-CGT. These results enhance our understanding of the relationship between the circumglobal teleconnection and the ISM and is helpful for improving the prediction of the circumglobal teleconnection variability. |
author2 |
the Strategic Priority Research Program of the Chinese Academy of Sciences the Second Tibetan Plateau Scientific Expedition and Research Program of China the National Natural Science Foundation of China the National Key Research and Development Program of China Guangdong Province Key Laboratory for Climate Change and Natural Disaster Studies |
format |
Article in Journal/Newspaper |
author |
Li, Qingquan Zhao, Mengchu Yang, Song Shen, Xinyong Dong, Lili Liu, Zhaodong |
author_facet |
Li, Qingquan Zhao, Mengchu Yang, Song Shen, Xinyong Dong, Lili Liu, Zhaodong |
author_sort |
Li, Qingquan |
title |
A zonally-oriented teleconnection pattern induced by heating of the western Tibetan Plateau in boreal summer |
title_short |
A zonally-oriented teleconnection pattern induced by heating of the western Tibetan Plateau in boreal summer |
title_full |
A zonally-oriented teleconnection pattern induced by heating of the western Tibetan Plateau in boreal summer |
title_fullStr |
A zonally-oriented teleconnection pattern induced by heating of the western Tibetan Plateau in boreal summer |
title_full_unstemmed |
A zonally-oriented teleconnection pattern induced by heating of the western Tibetan Plateau in boreal summer |
title_sort |
zonally-oriented teleconnection pattern induced by heating of the western tibetan plateau in boreal summer |
publisher |
Springer Science and Business Media LLC |
publishDate |
2021 |
url |
http://dx.doi.org/10.1007/s00382-021-05841-6 https://link.springer.com/content/pdf/10.1007/s00382-021-05841-6.pdf https://link.springer.com/article/10.1007/s00382-021-05841-6/fulltext.html |
geographic |
Bering Sea Canada Indian |
geographic_facet |
Bering Sea Canada Indian |
genre |
Bering Sea |
genre_facet |
Bering Sea |
op_source |
Climate Dynamics volume 57, issue 9-10, page 2823-2842 ISSN 0930-7575 1432-0894 |
op_rights |
https://creativecommons.org/licenses/by/4.0 https://creativecommons.org/licenses/by/4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1007/s00382-021-05841-6 |
container_title |
Climate Dynamics |
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1766378211147513856 |