The disproportionate impact of enhanced evaporation from melting arctic sea ice on cold-season land precipitation trends
Artikel i vetenskaplig tidskrift, 2024

Diminishing Arctic sea ice has led to enhanced evaporation from the Arctic marginal seas (AMS), which is expected to alter precipitation over land. In this work, AMS evaporation is numerically tracked to quantify its contribution to cold-season (October–March) precipitation over land in the Northern Hemisphere during 1980–2021. Results show a significant 32% increase in AMS moisture contribution to land precipitation, corresponding to a 16% increase per million square km loss of sea ice area. Especially over the high-latitude land, despite the fractional contribution of AMS to precipitation being relatively low (8%), the augmented AMS evaporation contributed disproportionately (42%) to the observed upward trend in precipitation. Notably, northern East Siberia exhibited a substantial rise in both the amount and fraction of extreme snowfall sourced from the AMS. Our findings underscore the importance of the progressively ice-free Arctic as an important contributor to the escalating levels of cold-season precipitation and snowfall over northern high-latitude land.


Yubo Liu

Chinese Academy of Sciences

Qiuhong Tang

Chinese Academy of Sciences

Chi Zhang

Chinese Academy of Sciences

Deliang Chen

Göteborgs universitet

Jennifer A. Francis

Woodwell Climate Research Center

L. Ruby Leung

Pacific Northwest National Laboratory

Hans Chen

Chalmers, Rymd-, geo- och miljövetenskap, Geovetenskap och fjärranalys

npj Climate and Atmospheric Science

23973722 (eISSN)

Vol. 7 1 126


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