Linking Arctic variability and change with extreme winter weather in the United States
- PMID: 34516838
- DOI: 10.1126/science.abi9167
Linking Arctic variability and change with extreme winter weather in the United States
Abstract
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.
Comment in
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Stratospheric winds trigger cold spells.Science. 2021 Sep 3;373(6559):1091. doi: 10.1126/science.abl9792. Epub 2021 Sep 1. Science. 2021. PMID: 34516849
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Arctic change reduces risk of cold extremes.Science. 2022 Feb 18;375(6582):729. doi: 10.1126/science.abn2414. Epub 2022 Feb 17. Science. 2022. PMID: 35175808 No abstract available.
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