首页|Land-atmosphere feedbacks weaken the risks of precipitation extremes over Australia in a warming climate

Land-atmosphere feedbacks weaken the risks of precipitation extremes over Australia in a warming climate

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The importance of land-atmosphere feedbacks on regional precipitation changes has been recently noted.However,how land-atmosphere feedbacks shape daily precipitation distributions,particularly the tails of precipitation distributions associated with extreme events,remains unclear on a regional scale.Herein,using the latest land-atmosphere coupling experiments,this study reveals a consistent weakening effect of land-atmosphere feedbacks on the future increase in precipitation extremes over Australia,revealing the most pronounced reduction(56.8%)for the long-term(2080-2099)projection under the low emission(SSP1-2.6)scenario.This weakening effect holds true for shifts in the extreme tail of precipitation distribution,resulting in a reduced risk of precipitation extremes in a warming climate.Land-atmosphere feedbacks offset 28%-60%of the occurrence risk for the 99th percentile of daily precipitation,with the largest reduction of 172%when precipitation exceeds the 99.7th percentile in the long-term projection under the high emission(SSP5-8.5)scenario.Considering less water replenishment,these feedbacks may reduce the risk of flooding but potentially expedite droughts,highlighting the role of land-atmosphere feedbacks in extreme event pro-jection and regional climate adaptation.

Land-atmosphere feedbacksExtreme precipitationAustraliaPrecipitation distribution

Mei-Yu CHANG、Zhi-Yan ZUO、Liang QIAO、Kai-Wen ZHANG、Bo LIU

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Key Laboratory of Polar Atmosphere-Ocean-Ice System for Weather and Climate of Ministry of Education/Shanghai Key Laboratory of Ocean-Land-Atmosphere Boundary Dynamics and Climate Change,Department of Atmospheric and Oceanic Sciences/Institute of Atmospheric Sciences,Fudan University,Shanghai 200438,China

Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters,Nanjing University of Information Science and Technology,Nanjing 210044,China

Department of Atmospheric Science,School of Environmental Studies,China University of Geosciences,Wuhan 430074,China

2024

气候变化研究进展(英文版)
国家气候中心

气候变化研究进展(英文版)

影响因子:0.806
ISSN:1674-9278
年,卷(期):2024.15(5)