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<p>Global warming has accelerated Arctic warming and vegetation expansion. Concurrently, summer Arctic cyclones pose increasing threats to shipping and ecosystems. Here, we demonstrate that enhanced vegetation growth (“Arctic greening”) since 2000 has significantly contributed to the intensification of summer Arctic cyclones. Using satellite-derived vegetation indices and atmospheric reanalysis data (1982–2022), we show that both cyclone intensity and Arctic vegetation greenness have exhibited significant positive trends post-2000. This greening has reduced land surface albedo by approximately 5%, increasing absorbed solar radiation by ~ 11.11&#xa0;W m<sup>−2</sup> and elevating near-surface atmospheric heating by ~ 5.61&#xa0;W m<sup>−2</sup>. This persistent lower-tropospheric warming reduces static stability along the Eurasian coastal zone, thereby enhancing the meridional temperature gradients critical for cyclone development via baroclinic processes. Our results establish vegetation-atmosphere feedbacks as a key mechanism amplifying recent summer Arctic cyclone activity.</p>

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Arctic greening amplifies summer cyclone intensity over northern Eurasia

  • 期刊论文

  • 发表日期：

    2025年12月19日

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  • Yujing Qin,
  • Shengwang Yang,
  • Yang Kong,
  • Chuhan Lu

摘要

Global warming has accelerated Arctic warming and vegetation expansion. Concurrently, summer Arctic cyclones pose increasing threats to shipping and ecosystems. Here, we demonstrate that enhanced vegetation growth (“Arctic greening”) since 2000 has significantly contributed to the intensification of summer Arctic cyclones. Using satellite-derived vegetation indices and atmospheric reanalysis data (1982–2022), we show that both cyclone intensity and Arctic vegetation greenness have exhibited significant positive trends post-2000. This greening has reduced land surface albedo by approximately 5%, increasing absorbed solar radiation by ~ 11.11 W m−2 and elevating near-surface atmospheric heating by ~ 5.61 W m−2. This persistent lower-tropospheric warming reduces static stability along the Eurasian coastal zone, thereby enhancing the meridional temperature gradients critical for cyclone development via baroclinic processes. Our results establish vegetation-atmosphere feedbacks as a key mechanism amplifying recent summer Arctic cyclone activity.