Linking Arctic variability and change with extreme winter weather in the United States
Linking Arctic variability and change with extreme winter weather in the United States
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DOI：
10.1126/science.abi9167
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发表时间：
2021-09-03
期刊：
影响因子：
56.9
通讯作者：
White, Ian
中科院分区：
文献类型：
--
作者：
Cohen, Judah;Agel, Laurie;White, Ian
北极变暖的速度是全球平均速度的两倍，据报道，在许多人口稠密的中纬度地区，严冬天气正在增加，但对于这两种现象之间是否存在物理联系没有达成一致意见。我们使用观测分析表明，一个鲜为人知的平流层极涡（SPV）破坏，涉及波反射和SPV的拉伸，与亚洲和北美部分地区的极端寒冷有关，包括最近的2021年2月德克萨斯寒潮，并且在卫星时代一直在增加。然后，我们使用数值模拟实验迫使秋季积雪和北极海冰的趋势，建立北极变化和SPV拉伸和相关的表面影响之间的物理联系。
The Arctic is warming at a rate twice the global average and severe winter weather is reported to be increasing across many heavily populated mid-latitude regions, but there is no agreement on whether a physical link exists between the two phenomena. We use observational analysis to show that a lesser-known stratospheric polar vortex (SPV) disruption that involves wave reflection and stretching of the SPV is linked with extreme cold across parts of Asia and North America, including the recent February 2021 Texas cold wave, and has been increasing over the satellite era. We then use numerical modeling experiments forced with trends in autumn snow cover and Arctic sea ice to establish a physical link between Arctic change and SPV stretching and related surface impacts.