Attribution analysis of trends in reference crop evapotranspiration in China

作     者：LIU Yue GUO Mengjing LI Jing LYU Na ZHANG Junqi ZHANG Bowen 

作者机构：State Key Laboratory of Eco-hydraulics in Northwest Arid RegionXi’an University of TechnologyXi’an710000China 

出 版 物：《Journal of Geographical Sciences》 (地理学报(英文版))

年 卷 期：2025年第35卷第1期

页      面：3-16页

核心收录：

学科分类：0202[经济学-应用经济学] 02[经济学] 020205[经济学-产业经济学] 

基　　金：National Natural Science Foundation of China No.42277191 No.42377072 No.42107087 

主　　题：reference crop evapotranspiration climate change contribution rate trend analysis 

摘      要：Reference crop evapotranspiration(ET_(0)) is essential for determining crop water requirements and developing irrigation *** this study,ET_(0) was calculated via the FAO-56 Penman-Monteith model,and the spatiotemporal variations in ET_(0) over China from 1960 to 2019 were *** then quantified the contributions of five driving factors(air temperature,wind speed,relative humidity,sunshine hours,and CO_(2) concentration)to the ET_(0) trends via a detrending *** results revealed that nationwide ET_(0) showed no significant(p0.05)decreasing trend from 1960 to 2019,with a trend of−8.56×10^(−2)mm a^(−2).The average temperature and wind speed were identified as the dominant factors affecting ET_(0)trends at the national *** contributions of the driving factors to the ET_(0) trends were ranked in the following order:average temperature(21.3%)wind speed(−15.63%)sunshine hours(−11.99%)CO_(2) concentration(6.36%)relative humidity(3.58%).Spatially,the dominant factors influencing the ET_(0) trends varied *** the southeastern region,average temperature and sunshine hours dominated the trends of ET_(0),whereas wind speed and average temperature were the dominant factors in the northwestern *** findings provide valuable insights into the dominant factors affecting ET_(0)trends in China and highlight the importance of considering different driving factors in calculating crop water requirements.