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238 / 2026-03-09 12:45:49
Eurasia’s transition from colder winters to hotter summers driven by North Atlantic air–sea interaction and Arctic sea ice anomalies
极端事件、北极海冰、北大西洋海气相互作用
主题1 天气、气候、全球变化、行星大气 > 专题1.14 极地与中低纬气候系统相互作用
摘要录用
陈尚锋 / 中国科学院大气物理研究所
Extreme cold winters and hot summers over Eurasia are intensifying under global warming, pos


ing substantial risks to agriculture, ecosystems, and human health. Here, we show that a colder


winter tends to be followed by a hotter summer over Eurasia. This winter-summer extreme tem


perature reversal is linked to the phase switch of the Arctic oscillation (AO) from winter to sum


mer, which is driven by the North Atlantic air–sea interaction and Arctic sea ice-atmosphere coup


ling. Specifically, a negative AO in winter weakens high-latitude westerlies, causing cold extremes


over Eurasia. Negative AO also induces a tripolar sea surface temperature anomaly in the North


Atlantic that persists into the following summer and triggers positive AO-like atmospheric anom


alies, leading to a hotter summer across Eurasia. Moreover, winter atmospheric anomalies reduce


the Barents–Kara sea ice through horizontal moisture transport. This sea ice loss persists into


summer and contributes to the formation of positive AO-like atmospheric anomalies. These pro


cesses establish a cross-seasonal transition from extreme cold winters to extreme hot summers over


Eurasia, offering new insight into the prediction of summer extreme events.
重要日期

  • 会议日期

    04月25日

    2026

    至

    04月29日

    2026

  • 04月07日 2026

    初稿截稿日期

主办单位
未来大气科学论坛理事会
承办单位
河海大学海洋学院
南京大学南京赫尔辛基大气与地球系统科学学院
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