Extreme weather characteristics and influences on urban ecosystem services in Wuhan Urban Agglomeration  

作　　者：Xin Dai Lunche Wang Jie Gong Zigeng Niu Qian Cao 

机构地区：[1]Hubei Key Laboratory of Regional Ecology and Environmental Change,School of Geography and Information Engineering,China University of Geosciences,Wuhan 430074,China [2]Hunan Key Laboratory of Remote Sensing of Ecological Environment in Dongting Lake Area,School of Geography and Information Engineering,China University of Geosciences,Wuhan 430074,China [3]Hubei Luojia Laboratory,Wuhan 430079,China

出　　处：《Geography and Sustainability》2025年第1期211-222,共12页地理学与可持续性(英文)

基　　金：supported by the National Natural Science Foundation of China(Grants No.42371354,42375129,42371115);the Fundamental Research Funds for National Universities,China Uni-versity of Geosciences,Wuhan.

摘　　要：In recent years,there has been a pronounced increase in the frequency of extreme weather events.To compre hensively examine the impact of extreme weather on ecosystem services within the Wuhan Urban Agglomera tion(WUA),this study utilized meteorological station data,the Mann-Kendall(MK)test,and the Standardized Precipitation-Evapotranspiration Index(SPEI)to quantify the variation trends in heatwaves(HW)and droughts from 1961 to 2020.Then the Integrated Valuation of Ecosystem Services and Trade-offs(InVEST)model was employed to evaluate and compare the differences in water yield and climate regulation ecosystem services un der various HW,droughts,and HW-drought combination scenarios.The results show that over the past 60 years,the temperature,duration,and frequency of HW have significantly increased in the WUA.Specifically,the high est HW temperature,total HW days,HW frequency,and average HW temperature showed changing trend of+0.17℃/decade,+1.4 day/decade,+0.19 event/decade,and+0.07℃/decade,respectively.The year 2000 was identified as a mutation year for HW,characterized by increased frequency and heightened severity thereafter.The SPEI value exhibited an insignificant upward trend,with 1980 marked as a mutation year,indicating a de creasing trend in drought occurrences after 1980.Heatwaves have a weakening effect on both water yield and climate regulation services,while drought significantly weakened water yield and had a relatively modest effect on climate regulation.During HW-drought composite period,the average monthly water yield showed a notable discrepancy of 60 mm compared to humid years.Besides,as heatwaves intensify,the area of low aggregation for ecosystem services expands,whereas the area of high aggregation decreases.This study provides a preliminary understanding of the impact of urban extreme weather on urban ecosystem services under changing climatic conditions.

关 键 词：Heatwaves DROUGHT Ecosystem services Extreme weather composite events 

分 类 号：P46[天文地球—大气科学及气象学]