Lagged influence of Atlantic and Pacific climate patterns on European extreme precipitation.

Lagged influence of Atlantic and Pacific climate patterns on European extreme precipitation.
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DOI:
10.1038/s41598-018-24069-9
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发表时间:
2018-04-10
期刊:
影响因子:
4.6
通讯作者:
Willems P
Willems P
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Tabari H;Willems P

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欧洲极端降水和洪水作为经济和人道主义灾难的风险受到大规模大气过程的调节,这些过程在(多)十年周期内运作,并将大量水分从海洋输送到内陆。然而,以往的研究,以更好地了解极端降水变率和它的季节预报技巧是远远不够的全面。在这里,我们表明,冬季北大西洋涛动(NAO),并在较小程度上,冬季ENSO信号有一个控制的影响,不仅同时对欧洲极端降水异常在冬季,但在一个延迟的方式在随后的季节极端。在一个类似的模式,有一个强大的足迹,夏季大气环流在地中海夏季极端降水和1,2和3个季节滞后于秋季,冬季和春季极端。不同大气环流模式的综合影响标志着在最先进的季节预测系统中提高欧洲极端降水的可预测性方面迈出了重要的一步。
The risk of European extreme precipitation and flooding as an economic and humanitarian disaster is modulated by large-scale atmospheric processes that operate over (multi-)decadal periods and transport huge quantities of moisture inland from the oceans. Yet the previous studies for better understanding of extreme precipitation variability and its skillful seasonal prediction are far from comprehensive. Here we show that the winter North Atlantic Oscillation (NAO) and, to a lesser extent, winter ENSO signal have a controlling influence not only concurrently on European extreme precipitation anomaly in winter, but in a delayed way on the extremes in the following seasons. In a similar pattern, there is a strong footprint of summer atmospheric circulations over the Mediterranean Sea on summer extreme precipitation and with 1-, 2- and 3-season lags on the following autumn, winter and spring extremes. The combined influences of the different atmospheric circulation patterns mark a significant step forward for an improved predictability of European extreme precipitation in the state-of-the-art seasonal prediction systems.
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