干旱区地理2025，Vol.48Issue(10)：1736-1746,11.DOI:10.12118/j.issn.1000-6060.2024.652
近60a青海高原大气可降水量时空变化特征研究
Spatio-temporal variations of atmospheric precipitable water in the Qinghai Plateau in the past 60 years
摘要
Abstract
Based on data from 42 surface meteorological stations in Qinghai Province,China from 1961 to 2020,the temporal and spatial distribution characteristics of precipitable water vapor(PWV)on the Qinghai Plateau were calculated and analyzed using an empirical formula between PWV and surface water vapor pressure.Re-sults showed a clear increasing trend in PWV,with maximum values in summer,exhibiting a unimodal distribu-tion.Spatially,PWV increased from west to east and from north to south,with high values in the eastern agricul-tural area and low values in the Qaidam Basin.Seasonal maxima were observed in the eastern agricultural area,while the minimum occurred in winter.Vertical spatial variation showed the opposite trend,generally increasing from east to west and from south to north,with the smallest values at the eastern and southern edges of the prov-ince,and the largest values at the eastern lake region,central Qaidam Basin,and northeastern Qinghai.The annu-al mean PWV on the Qinghai Plateau exhibited both abrupt and periodic variations,with a significant change de-tected in 1997.Periodic variations were most pronounced on the 6-10 year timescale.The Hurst exponent values were all greater than 0.8,indicating strong persistence and a high probability that the current upward trend will continue in the future.Correlation analysis revealed that PWV had the lowest correlation with the Asian Meridio-nal Circulation Index and the highest correlation with the Arctic Oscillation Index.关键词
PWV/时空变化/Mann-Kendall突变检验/Morlet小波分析/Hurst指数/青海高原Key words
precipitable water vapor/space-time change/Mann-Kendall test/Morlet wavelet/Hurst index/Qinghai Plateau引用本文复制引用
伊俊兰,张仙,祁栋林,徐炜,辛萍萍..近60a青海高原大气可降水量时空变化特征研究[J].干旱区地理,2025,48(10):1736-1746,11.基金项目
海西州科技局项目(2019-ZJ-A10) （2019-ZJ-A10）
青海省科技厅项目(2021-SF-141)资助 （2021-SF-141）
