The Yangtze River Watershed in China is a climate change hotspot featuring strong spatial and temporal variability;hence,it poses a certain threat to social development.Iden-tifying the characteristics of and regions vulnerable to climate change is significantly im-portant for formulating adaptive countermeasures.However,with regard to the Yangtze River Watershed,there is currently a lack of research on these aspects from the perspective of natural and anthropogenic factors.To address this issue,in this study,based on the temper-ature and precipitation records from 717 meteorological stations,the RClimDex and random forest models were used to assess the spatiotemporal characteristics of climate change and identify mainly the natural and anthropogenic factors influencing climate change hotspots in the Yangtze River Watershed for the period 1958-2017.The results indicated a significant increasing trend in temperature,a trend of wet and dry polarization in the annual precipitation,and that the number of temperature indices with significant variations was 2.8 times greater than that of precipitation indices.Significant differences were also noted in the responses of the climate change characteristics of the sub-basins to anthropogenic and natural factors;the delta plain of the Yangtze River estuary exhibited the most significant climate changes,where 88.89％of the extreme climate indices varied considerably.Furthermore,the characteristics that were similar among the identified hotpots,including human activities(higher Gross Do-mestic Product and construction land proportions)and natural factors(high altitudes and large proportions of grassland and water bodies),were positively correlated with the rapid climate warming.

CHENG Guowei;LIU Yong;CHEN Yan;GAO Wei

Institute of International Rivers and Eco-security,Yunnan Key Laboratory of International Rivers and Transboundary Eco-Security,Yunnan University,Kunming 650091,China;College of Environmental Science and Engineering,Key Laboratory of Water and Sediment Sciences(MOE),Peking University,Beijing 100871,China;State Environmental Protection Key Laboratory of Environmental Planning and Policy Simulation,Chinese Academy for Environmental Planning,Beijing 100012,China;Institute of Environmental and Ecological Engineering,Guangdong University of Technology,Guangzhou 510006,China

地理学报（英文版）

[1]CHENG Guowei;LIU Yong;CHEN Yan;GAO Wei-.Spatiotemporal variation and hotspots of climate change in the Yangtze River Watershed during 1958-2017)[J].地理学报（英文版）,2022(01):141-155

Iden,hotpots

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