干旱区地理2025，Vol.48Issue(7)：1141-1152,12.DOI:10.12118/j.issn.1000-6060.2024.437
气候变化及新四季划分方法下的西藏季节变化趋势分析
Trend analysis of seasonal changes in Xizang based on climate change and new seasonal division
摘要
Abstract
This study analyzes daily temperature data from 38 meteorological stations in Xizang,China,covering the period from 1981 to 2023.A new method for seasonal division in Xizang was employed to categorize the four seasons,and the regional climate changes,temporal shifts in the start dates of each season,and trends in seasonal changes were examined.The results show the following.(1)Areas with four distinct seasons in Xizang are pri-marily found along the Yarlung Zangbo River and in Nyingchi City,whereas regions with less distinct seasonal variations(including areas without a summer season)are mainly situated in the western and northern parts of Xi-zang as well as in the high-altitude regions of the Himalayas.(2)In Xizang,the beginning of spring and summer tends to occur earlier,whereas the onset of autumn and winter tends to be delayed.Notably,the start date of spring was significantly earlier in 2000,whereas the onset of autumn and winter was significantly delayed in 2003 and 1995,respectively.(3)Regarding the timing of seasonal starts,the first empirical orthogonal function(EOF1)for spring and autumn exhibited a pattern of"northwest low and southeast high in spring,and middle high and both sides low in autumn".In spring,the second EOF(EOF2)presented a contrasting distribution pat-tern of"northwest positive and southeast negative",whereas in autumn,EOF2 showed an opposite spatial distri-bution pattern characterized by"southwest positive and northeast negative".The EOF1 in winter revealed a"high in the north and low in the southwest"pattern,whereas the EOF2 shared similarities with that of spring's EOF2.(4)Looking ahead,we anticipate that the start dates of spring and summer will be delayed,whereas those for autumn and winter will be advanced.关键词
开始日期/小波分析/趋势分析/经验正交函数(EOF)/西藏Key words
start date/wavelet analysis/trend analysis/empirical orthogonal function(EOF)/Xizang引用本文复制引用
史继清,罗珍,益西卓玛,刘赛,李积宏,旦增益嘎,甘臣龙..气候变化及新四季划分方法下的西藏季节变化趋势分析[J].干旱区地理,2025,48(7):1141-1152,12.基金项目
中国气象局公共气象服务中心创新基金项目(M2021015) （M2021015）
区域创新发展联合基金重点支持项目(U23A2006) （U23A2006）
西藏自治区科技创新基地建设项目(XZ202401YD0008) （XZ202401YD0008）
西藏自治区科技计划重点研发及转化项目(XZ202401ZY0065)资助 （XZ202401ZY0065）
