Influence of December snow cover over North America on January surface air temperature over the midlatitude Asia
Abstract The impact of North American (NA) snow cover on the Northern Hemisphere climate has drawn increasing attention in recent years. This study reveals a negative relationship between NA snow cover in December and surface air temperature (SAT) over the midlatitude Asia in the following January....
Published in: | International Journal of Climatology |
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crwiley:10.1002/joc.6235 2024-06-02T08:11:05+00:00 Influence of December snow cover over North America on January surface air temperature over the midlatitude Asia Li, Jingyi Li, Fei He, Shengping Wang, Huijun Orsolini, Yvan J. National Natural Science Foundation of China National Basic Research Program of China 2019 http://dx.doi.org/10.1002/joc.6235 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fjoc.6235 https://onlinelibrary.wiley.com/doi/pdf/10.1002/joc.6235 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/joc.6235 https://rmets.onlinelibrary.wiley.com/doi/pdf/10.1002/joc.6235 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor International Journal of Climatology volume 40, issue 1, page 572-584 ISSN 0899-8418 1097-0088 journal-article 2019 crwiley https://doi.org/10.1002/joc.6235 2024-05-03T11:43:54Z Abstract The impact of North American (NA) snow cover on the Northern Hemisphere climate has drawn increasing attention in recent years. This study reveals a negative relationship between NA snow cover in December and surface air temperature (SAT) over the midlatitude Asia in the following January. The results show that, in December, the extensive snow cover decreases SAT over NA via local diabatic cooling, which further intensifies the Atlantic jet stream by enlarging the meridional gradient of the 1,000‐ to 300‐hPa layer thickness, especially along 40°N. Meanwhile, we found negative sea surface temperature (SST) anomalies over the Western North Atlantic and enhanced transient eddy activity over the Eastern North Atlantic due to anomalous net energy conversion from the mean flow. In January, a zonally oriented dipole of transient eddy anomalies straddles the North Atlantic, with the negative–positive (west–east) anomaly centres attributing to local oceanic cooling and the persistence of the eddy–mean flow interaction, respectively. Such dipole of transient eddy activity in turn favours the downstream development of the Atlantic jet stream. Besides, the changes in surface turbulent heat flux over the North Atlantic trigger a Rossby wave train that propagates across Europe and towards the Far East. Coincident with the strengthened Siberian High and the accelerated East Asian jet stream in January, SAT decreases over the midlatitude Asia. Hence, our analysis indicates that December NA snow cover could potentially be exploited for subseasonal predictability over Asia. Article in Journal/Newspaper North Atlantic Wiley Online Library International Journal of Climatology 40 1 572 584 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract The impact of North American (NA) snow cover on the Northern Hemisphere climate has drawn increasing attention in recent years. This study reveals a negative relationship between NA snow cover in December and surface air temperature (SAT) over the midlatitude Asia in the following January. The results show that, in December, the extensive snow cover decreases SAT over NA via local diabatic cooling, which further intensifies the Atlantic jet stream by enlarging the meridional gradient of the 1,000‐ to 300‐hPa layer thickness, especially along 40°N. Meanwhile, we found negative sea surface temperature (SST) anomalies over the Western North Atlantic and enhanced transient eddy activity over the Eastern North Atlantic due to anomalous net energy conversion from the mean flow. In January, a zonally oriented dipole of transient eddy anomalies straddles the North Atlantic, with the negative–positive (west–east) anomaly centres attributing to local oceanic cooling and the persistence of the eddy–mean flow interaction, respectively. Such dipole of transient eddy activity in turn favours the downstream development of the Atlantic jet stream. Besides, the changes in surface turbulent heat flux over the North Atlantic trigger a Rossby wave train that propagates across Europe and towards the Far East. Coincident with the strengthened Siberian High and the accelerated East Asian jet stream in January, SAT decreases over the midlatitude Asia. Hence, our analysis indicates that December NA snow cover could potentially be exploited for subseasonal predictability over Asia. |
author2 |
National Natural Science Foundation of China National Basic Research Program of China |
format |
Article in Journal/Newspaper |
author |
Li, Jingyi Li, Fei He, Shengping Wang, Huijun Orsolini, Yvan J. |
spellingShingle |
Li, Jingyi Li, Fei He, Shengping Wang, Huijun Orsolini, Yvan J. Influence of December snow cover over North America on January surface air temperature over the midlatitude Asia |
author_facet |
Li, Jingyi Li, Fei He, Shengping Wang, Huijun Orsolini, Yvan J. |
author_sort |
Li, Jingyi |
title |
Influence of December snow cover over North America on January surface air temperature over the midlatitude Asia |
title_short |
Influence of December snow cover over North America on January surface air temperature over the midlatitude Asia |
title_full |
Influence of December snow cover over North America on January surface air temperature over the midlatitude Asia |
title_fullStr |
Influence of December snow cover over North America on January surface air temperature over the midlatitude Asia |
title_full_unstemmed |
Influence of December snow cover over North America on January surface air temperature over the midlatitude Asia |
title_sort |
influence of december snow cover over north america on january surface air temperature over the midlatitude asia |
publisher |
Wiley |
publishDate |
2019 |
url |
http://dx.doi.org/10.1002/joc.6235 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fjoc.6235 https://onlinelibrary.wiley.com/doi/pdf/10.1002/joc.6235 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/joc.6235 https://rmets.onlinelibrary.wiley.com/doi/pdf/10.1002/joc.6235 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
International Journal of Climatology volume 40, issue 1, page 572-584 ISSN 0899-8418 1097-0088 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/joc.6235 |
container_title |
International Journal of Climatology |
container_volume |
40 |
container_issue |
1 |
container_start_page |
572 |
op_container_end_page |
584 |
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1800757117913661440 |