摘要
水汽作为评估降水潜力的重要指标,对科学开发干旱区空中水资源具有重要意义。为此,基于2021年1月—2024年12月塔里木盆地东南部3个地基GPS大气可降水量资料(GPS-PWV)及73个地面气象观测站逐时水汽压和降水资料,构建了适用于当地的地面经验计算模型(W-e),分析塔里木盆地东南部的大气水汽含量(W-PWV)时空分布特征及降水量、降水时长与其变化的关系。结果表明:(1)在年和季节尺度下,塔里木盆地东南部的WPWV高值区位于平原区域,沙漠区域次之,山区区域最低。(2)山区测站的W-PWV随海拔高度增加而减少,秋季是W-PWV主要增长时期,而W-PWV减小时期在不同海拔高度上有差异,其中3000 m以下测站主要出现在春季,3000 m以上测站则在夏季。(3)降水前6 h在38.5°N以南,海拔在1500 m以上的测站W-PWV变化速率较小,但降水转化率较大。(4)不同降水时长下,研究区及山区的W-PWV峰值出现在降水前2~3 h,平原区的W-PWV峰值出现时间随降水时长增加而提前,而沙漠区的W-PWV峰值则随降水时长增加多出现在降水开始前。
Water vapor,an important indicator for evaluating precipitation potential,plays a significant role in the scientific development of water resources in arid regions.Therefore,based on the atmospheric water vapor(GPS-PWV)records of three ground-based GPS stations in the southeastern portion of Tarim Basin between 2021 and 2024(January to December)and hourly water vapor pressure and precipitation records from 73 groundbased meteorological observation stations across the region,an empirical calculation model(W-e)suitable for Tarim Basin local conditions was constructed.The spatiotemporal distribution of water vapor(W-PWV)content and the relationship between precipitation and duration of precipitation were determined.The results show the following:(1)The annual and seasonal high W-PWV areas are located in the plain regions,followed by the desert regions,with the mountainous regions having the lowest W-PWV.(2)For the mountainous regions,W-PWV increases in autumn across all altitudes and decreases in spring below 3000 m and in summer above 3000 m.(3)South of 38.5°N and above 1500 m,the W-PWV variation rate is low and the precipitation conversion rate is high 6 hours before precipitation.(4)For different durations of precipitation,the peak W-PWV in the study area and the mountainous regions were observed 2-3 hours before precipitation.In the plain regions,the peak W-PWV occurs earlier with increasing duration of precipitation,whereas in the desert areas,it occurs later with increasing duration of precipitation.
作者
刁鹏
杨柳
张玲
周雪英
DIAO Peng;YANG Liu;ZHANG Ling;ZHOU Xueying(Bayingol Mongolian Autonomous Prefectrue Meteorological Bureau,Korla 841000,Xinjiang,China;Xinjiang Weather Modification Engineering Technology Research Center,Urumqi 830002,Xinjiang,China;Alar Meteorological Bureau,Alar 843300,Xinjiang,China)
出处
《干旱区研究》
北大核心
2026年第1期13-24,共12页
Arid Zone Research
基金
新疆天山英才培养计划(2024TSYCJC0046,2023TSYCCX0077,2023TSYCJC0064)
新疆维吾尔自治区气象局引导性计划项目(YD2024018)
新疆气象高层次骨干人才计划。
关键词
大气水汽
降水转化率
时空特征
塔里木盆地东南部
water vapor
precipitation conversion efficiency
spatiotemporal characteristics
southeastern of Tarim Basin
