Multiple large-scale dynamical pathways for pan--Atlantic compound cold and windy extremes
Winter cold spells over North America have been correlated with European wind extremes, but the physical mechanisms behind such “pan-Atlantic” compound extremes have not been clarified yet. In this study, we propose that pan–Atlantic cold and windy extremes occur following two possible dynamical pat...
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Online Access: | http://dx.doi.org/10.22541/essoar.167108815.57535236/v1 |
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crwinnower:10.22541/essoar.167108815.57535236/v1 2024-06-02T08:11:23+00:00 Multiple large-scale dynamical pathways for pan--Atlantic compound cold and windy extremes Riboldi, Jacopo Leeding, Richard Segalini, Antonio Messori, Gabriele 2022 http://dx.doi.org/10.22541/essoar.167108815.57535236/v1 unknown Authorea, Inc. posted-content 2022 crwinnower https://doi.org/10.22541/essoar.167108815.57535236/v1 2024-05-07T14:19:26Z Winter cold spells over North America have been correlated with European wind extremes, but the physical mechanisms behind such “pan-Atlantic” compound extremes have not been clarified yet. In this study, we propose that pan–Atlantic cold and windy extremes occur following two possible dynamical pathways. The first one involves the propagation of a Rossby wave train from the Pacific Ocean, associated with windstorms over north-western Europe in the 5-10 days after the cold spell peak. The second is associated with a high-latitude anticyclone over the North Atlantic and an equatorward-shifted jet, leading to windstorms over south-western Europe already in the days preceding the cold spell peak. European windstorms are thus consistently tied to North American cold spells according to the different flow configuration. The analysis underscores that seemingly similar surface extremes may be driven by different processes, and that overlooking these subtleties and conflating them together could lead to misleading conclusions. Other/Unknown Material North Atlantic The Winnower Pacific |
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crwinnower |
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description |
Winter cold spells over North America have been correlated with European wind extremes, but the physical mechanisms behind such “pan-Atlantic” compound extremes have not been clarified yet. In this study, we propose that pan–Atlantic cold and windy extremes occur following two possible dynamical pathways. The first one involves the propagation of a Rossby wave train from the Pacific Ocean, associated with windstorms over north-western Europe in the 5-10 days after the cold spell peak. The second is associated with a high-latitude anticyclone over the North Atlantic and an equatorward-shifted jet, leading to windstorms over south-western Europe already in the days preceding the cold spell peak. European windstorms are thus consistently tied to North American cold spells according to the different flow configuration. The analysis underscores that seemingly similar surface extremes may be driven by different processes, and that overlooking these subtleties and conflating them together could lead to misleading conclusions. |
format |
Other/Unknown Material |
author |
Riboldi, Jacopo Leeding, Richard Segalini, Antonio Messori, Gabriele |
spellingShingle |
Riboldi, Jacopo Leeding, Richard Segalini, Antonio Messori, Gabriele Multiple large-scale dynamical pathways for pan--Atlantic compound cold and windy extremes |
author_facet |
Riboldi, Jacopo Leeding, Richard Segalini, Antonio Messori, Gabriele |
author_sort |
Riboldi, Jacopo |
title |
Multiple large-scale dynamical pathways for pan--Atlantic compound cold and windy extremes |
title_short |
Multiple large-scale dynamical pathways for pan--Atlantic compound cold and windy extremes |
title_full |
Multiple large-scale dynamical pathways for pan--Atlantic compound cold and windy extremes |
title_fullStr |
Multiple large-scale dynamical pathways for pan--Atlantic compound cold and windy extremes |
title_full_unstemmed |
Multiple large-scale dynamical pathways for pan--Atlantic compound cold and windy extremes |
title_sort |
multiple large-scale dynamical pathways for pan--atlantic compound cold and windy extremes |
publisher |
Authorea, Inc. |
publishDate |
2022 |
url |
http://dx.doi.org/10.22541/essoar.167108815.57535236/v1 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_doi |
https://doi.org/10.22541/essoar.167108815.57535236/v1 |
_version_ |
1800757513515171840 |