Possible linkage between winter extreme low temperature over central-western China and autumn sea ice loss
Based on reanalysis datasets and sea-ice sensitivity experiments, this study has pointed out that the autumn sea ice loss in East Siberian-Chukchi-Beaufort (EsCB) Seas significantly increases the frequency of winter extreme low temperature over western-central China. Autumn sea ice loss warms the tr...
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2022
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Online Access: | http://dx.doi.org/10.22541/essoar.167117463.31932217/v1 |
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crwinnower:10.22541/essoar.167117463.31932217/v1 2024-06-02T08:01:09+00:00 Possible linkage between winter extreme low temperature over central-western China and autumn sea ice loss Ding, Shuoyi Wu, Bingyi Chen, Wen Graf, Hans-F. Zhang, Xuanwen 2022 http://dx.doi.org/10.22541/essoar.167117463.31932217/v1 unknown Authorea, Inc. posted-content 2022 crwinnower https://doi.org/10.22541/essoar.167117463.31932217/v1 2024-05-07T14:19:12Z Based on reanalysis datasets and sea-ice sensitivity experiments, this study has pointed out that the autumn sea ice loss in East Siberian-Chukchi-Beaufort (EsCB) Seas significantly increases the frequency of winter extreme low temperature over western-central China. Autumn sea ice loss warms the troposphere and generates anticyclonic anomaly over the Arctic region one month later. Under the effects of synoptic eddy-mean flow interaction and anomalous upward propagated planetary wave 2, the Arctic anticyclonic anomaly strengthens and develops toward Greenland-Northern Europe, accompanied by a weakened stratospheric polar vortex. In winter, following intra-seasonal downward propagation of stratospheric anomalies, the Northern European positive geopotential anomalies enhance and expand downstream within 7 days, favoring Arctic cold air east of Novaya Zemlya southward (hyperpolar path) accumulating in Siberia around Lake of Baikal. In the subsequent 2~3 days, these cold anomalies rapidly intrude western-central China and induce abrupt sharp cooling, thus more frequent extreme low temperature there. Other/Unknown Material Arctic Chukchi Greenland Novaya Zemlya Sea ice Siberia The Winnower Arctic Greenland |
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The Winnower |
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crwinnower |
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unknown |
description |
Based on reanalysis datasets and sea-ice sensitivity experiments, this study has pointed out that the autumn sea ice loss in East Siberian-Chukchi-Beaufort (EsCB) Seas significantly increases the frequency of winter extreme low temperature over western-central China. Autumn sea ice loss warms the troposphere and generates anticyclonic anomaly over the Arctic region one month later. Under the effects of synoptic eddy-mean flow interaction and anomalous upward propagated planetary wave 2, the Arctic anticyclonic anomaly strengthens and develops toward Greenland-Northern Europe, accompanied by a weakened stratospheric polar vortex. In winter, following intra-seasonal downward propagation of stratospheric anomalies, the Northern European positive geopotential anomalies enhance and expand downstream within 7 days, favoring Arctic cold air east of Novaya Zemlya southward (hyperpolar path) accumulating in Siberia around Lake of Baikal. In the subsequent 2~3 days, these cold anomalies rapidly intrude western-central China and induce abrupt sharp cooling, thus more frequent extreme low temperature there. |
format |
Other/Unknown Material |
author |
Ding, Shuoyi Wu, Bingyi Chen, Wen Graf, Hans-F. Zhang, Xuanwen |
spellingShingle |
Ding, Shuoyi Wu, Bingyi Chen, Wen Graf, Hans-F. Zhang, Xuanwen Possible linkage between winter extreme low temperature over central-western China and autumn sea ice loss |
author_facet |
Ding, Shuoyi Wu, Bingyi Chen, Wen Graf, Hans-F. Zhang, Xuanwen |
author_sort |
Ding, Shuoyi |
title |
Possible linkage between winter extreme low temperature over central-western China and autumn sea ice loss |
title_short |
Possible linkage between winter extreme low temperature over central-western China and autumn sea ice loss |
title_full |
Possible linkage between winter extreme low temperature over central-western China and autumn sea ice loss |
title_fullStr |
Possible linkage between winter extreme low temperature over central-western China and autumn sea ice loss |
title_full_unstemmed |
Possible linkage between winter extreme low temperature over central-western China and autumn sea ice loss |
title_sort |
possible linkage between winter extreme low temperature over central-western china and autumn sea ice loss |
publisher |
Authorea, Inc. |
publishDate |
2022 |
url |
http://dx.doi.org/10.22541/essoar.167117463.31932217/v1 |
geographic |
Arctic Greenland |
geographic_facet |
Arctic Greenland |
genre |
Arctic Chukchi Greenland Novaya Zemlya Sea ice Siberia |
genre_facet |
Arctic Chukchi Greenland Novaya Zemlya Sea ice Siberia |
op_doi |
https://doi.org/10.22541/essoar.167117463.31932217/v1 |
_version_ |
1800745455305359360 |