干旱区研究2024，Vol.41Issue(11)：1797-1807,11.DOI:10.13866/j.azr.2024.11.01
西藏气候季节早晚和长短等级划分指标
Division index of early or late and length grade in climate seasons in Xizang
摘要
Abstract
To better understand the response mechanisms of seasonal changes in high-altitude areas to ecological and environmental factors amid global climate change,it is crucial to study the indicators of seasonal early or late and length grade duration classification in Xizang.In this study,we analyzed daily temperature data from 38 me-teorological stations in Xizang(1981-2023)using temperature thresholds of 6 ℃,17 ℃,17 ℃ and 6 ℃ for four seasons,to explore the classification indices and evolution laws of seasonal early or late and length grade.The re-sults revealed the following:(1)The average start dates for spring,summer,autumn,and winter at the 38 stations were April 21,June 17,July 17,and October 17,with average lengths of 56 d,29 d,92 d,and 188 d,respectively.(2)The start and end times,as well as the lengths of the climatic seasons,exhibit characteristics of minimum stan-dard deviation in winter and maximum standard deviation in summer.(3)The start dates,end dates,and length of the climatic seasons,as well as the start and end times and length of the four seasons,showed the following pat-terns:Normal＞slightly early(late)and early(late)＞significantly early(late)and abnormally early(late).A indica-tor is more in line with the threshold of the classification indicators of early or late and length grade.(4)In Xi-zang,the onset of spring and summer trends was earlier,while autumn and winter had late trends.(5)The start date of spring,the end date of winter,and the length of summer across the 38 stations were primarily classified as normal,whereas the start dates of summer,autumn,and winter,along with the end dates of spring and autumn,were mainly categorized as early.Conversely,the lengths of spring and autumn were mainly classified as short,while winter was predominantly classified as long,and the end date of summer was primarily considered late.These findings provide valuable insights into climate resource management,ecological protection,and the overall impact on human production and life.关键词
气候季节/早晚和长短等级/标准差/演变规律/西藏Key words
climate season/early or late and length grade/standard deviation/evolution law/Xizang引用本文复制引用
史继清,罗骕翾,张伟华,周刊社,胡洁,张东东,甘臣龙..西藏气候季节早晚和长短等级划分指标[J].干旱区研究,2024,41(11):1797-1807,11.基金项目
西藏自治区科技计划重点研发及转化(XZ202401ZY0065) （XZ202401ZY0065）
第二次青藏高原综合科学考察研究项目(2019QZKK0106) （2019QZKK0106）
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）
中国气象局创新发展专项(CXFZ2024J046) （CXFZ2024J046）
