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<p>Global warming is profoundly reshaping the ocean–land atmospheric moisture cycle and the precipitation patterns across Eurasia. However, the mechanisms driving interdecadal shifts in synchronized precipitation across different Eurasian regions far apart from each other—particularly the processes involving interactions in the atmospheric moisture cycle between multiple ocean basins and the land—remain poorly understood. Research indicates that global sea surface temperatures (SSTs) underwent an interdecadal shift in the mid-1980s. Notably, in 1986, precipitation over the Qinghai–Tibetan Plateau and its northern adjacent areas (hereafter QTP-N), as well as Northern Europe (N.Eur), experienced a synchronous interdecadal shift, both of which were driven by a multi-basin warming mode encompassing the Indo-Pacific Warm Pool (IP) and the North Atlantic. The variations of this mode act as a critical bridge, conveying global-scale SST shift signals to multiple Eurasian regions and triggering their climate responses. Furthermore, integrated analyses of multi-source observations and model simulations reveal that synchronous IP–North Atlantic warming can trigger a series of atmospheric teleconnection waves, markedly intensifying anomalous circulation over Eurasia. Through the dynamic effects of multi-basin teleconnection waves and associated moisture transport chains, these SST anomalies are linked to interdecadal precipitation shifts over the QTP-N and N.Eur.</p>

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Coordinated multi-ocean-basin forcing under global warming: mechanisms driving interdecadal shifts in Eurasian precipitation patterns

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年7月3日

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  • Na Dong,
  • Xiangde Xu,
  • Renhe Zhang

摘要

Global warming is profoundly reshaping the ocean–land atmospheric moisture cycle and the precipitation patterns across Eurasia. However, the mechanisms driving interdecadal shifts in synchronized precipitation across different Eurasian regions far apart from each other—particularly the processes involving interactions in the atmospheric moisture cycle between multiple ocean basins and the land—remain poorly understood. Research indicates that global sea surface temperatures (SSTs) underwent an interdecadal shift in the mid-1980s. Notably, in 1986, precipitation over the Qinghai–Tibetan Plateau and its northern adjacent areas (hereafter QTP-N), as well as Northern Europe (N.Eur), experienced a synchronous interdecadal shift, both of which were driven by a multi-basin warming mode encompassing the Indo-Pacific Warm Pool (IP) and the North Atlantic. The variations of this mode act as a critical bridge, conveying global-scale SST shift signals to multiple Eurasian regions and triggering their climate responses. Furthermore, integrated analyses of multi-source observations and model simulations reveal that synchronous IP–North Atlantic warming can trigger a series of atmospheric teleconnection waves, markedly intensifying anomalous circulation over Eurasia. Through the dynamic effects of multi-basin teleconnection waves and associated moisture transport chains, these SST anomalies are linked to interdecadal precipitation shifts over the QTP-N and N.Eur.