干旱区研究2023，Vol.40Issue(12)：1875-1884,10.DOI:10.13866/j.azr.2023.12.01
新疆气候干湿变化特征及其影响因素
Climate dry-wet conditions,changes,and their driving factors in Xinjiang
摘要
Abstract
Based on daily observations from 56 meteorological stations from 1961 to 2019,this study analyzed dry-wet conditions,changes,and their underlying driving factors in Xinjiang.The main findings are as follows:(1)In the past 59 years,the Xinjiang climate has changed significantly from dry to wet,with the aridity index(AI)changing at a rate of 0.01·(10a)-1(P<0.01).The number of stations with a significant upward trend of AI accounted for 57.1%.(2)The annual precipitation in Xinjiang increased significantly at a rate of 8.6 mm·(10a)-1 from 1961 to 2019,consistent with the change in AI.Conversely,the annual reference evapotranspiration(ET0)showed a significant decreasing trend at a rate of-15.7 mm·(10a)-1.However,it is worth noting that ET0 transitioned around 1990.ET0 continued to decrease before 1990 and then switched to a fluctuating upward trend.(3)Wind speed and relative humidity primarily influenced ET0 variation.Wind speed exhibited a consistent decreasing trend across the entire region,while approximately half of the stations observed a decline in relative humidity.The combined effect of these factors significantly decreased ET0 at nearly 50%of the stations in Xinjiang.Moreover,trends in relative humidity from increasing to decreasing trends and wind speed from decreasing to increasing around 1990 contribute to the differences in ET0 trends between the two periods.The conclusions achieved here provide valuable insights into understanding the dry-wet changes and their underlying driving factors in Xinjiang and have implications for the rational development and use of water resources in this region.关键词
气候干湿变化/干燥度指数/蒸散量/影响因素/新疆Key words
climate dry-wet changes/aridity index/evapotranspiration/driving factors/Xinjiang引用本文复制引用
董翰林,王文婷,谢云,阿依达娜·叶斯那力,江源天,徐嘉淇..新疆气候干湿变化特征及其影响因素[J].干旱区研究,2023,40(12):1875-1884,10.基金项目
国家重点研发计划项目(2021YFE0113800) （2021YFE0113800）
