干旱区研究2026，Vol.43Issue(6)：1113-1124,12.DOI:10.13866/j.azr.2026.06.01
巴音布鲁克区域大气可降水量变化特征及其与降水的关系
Variation characteristics of precipitable water vapor and its relationship with precipitation in the Bayanbuluk area
摘要
Abstract
Investigating the relationship between atmospheric precipitable water vapor(PWV)and precipitation is helpful not only for revealing regional cloud-precipitation physical characteristics and water cycle mechanisms,but also for providing key technical support for disaster prevention and mitigation,water resource utilization,and ecological protection.Based on hourly ground-based GPS atmospheric PWV data and precipitation data from Jan-uary 2021 to December 2025,and focusing on the climate-sensitive alpine region of Bayanbuluk as the study ar-ea,the temporal variation characteristics of PWV and its correlation mechanisms with precipitation were investi-gated.The results show that:(1)Both PWV and precipitation exhibit unimodal distributions at the monthly scale,with peak values occurring from June to August and troughs from December to February.At the daily scale,cumulative precipitation shows a notable increasing trend with PWV growth,indicating close synergistic variations between PWV and precipitation in the study area.(2)Before the occurrence of light rain events,the PWV peak usually appears 6 to 8 h earlier,while for moderate rain and heavy rain events,the lead time is rela-tively consistent,mainly 3 to 7 h before precipitation onset.This indicates that as the interval between the PWV peak and the start of precipitation becomes shorter,events with larger precipitation magnitudes are more likely to occur.(3)For events with rainfall intensities of R≤2.0 mm and 4.1 mm≤R≤6.0 mm at precipitation onset,the PWV peak mostly occurs 6 to 10 h before precipitation;for the 2.1 mm≤R≤4.0 mm range,it mostly occurs 5 to 7 h before;and for R≥6.1 mm,the PWV peak mostly occurs 3 to 6 h before.This indicates that as the interval be-tween the PWV peak and precipitation onset becomes shorter,the hourly precipitation at the initial moment tends to be larger.(4)When the duration of precipitation is less than 5 h,the precipitation conversion rate is generally high,exceeding 8.0%,while for durations of 5-14 h,the conversion rate is generally low,mostly less than 5.0%.In addition,the average precipitation conversion rate is highest for moderate rainfall events and R≥6.1 mm rain-fall intensity events in the afternoon,exceeding 11.3%and 40.0%,respectively.关键词
大气可降水量/降水量/降水转化率/变化特征/巴音布鲁克区域Key words
precipitable water vapor/precipitation/precipitation conversion efficient/variation characteristics/Bayanbuluke area引用本文复制引用
刁鹏,李圆圆,李刚,杨波..巴音布鲁克区域大气可降水量变化特征及其与降水的关系[J].干旱区研究,2026,43(6):1113-1124,12.基金项目
新疆维吾尔自治区重点研发计划项目(2023B03019-1) （2023B03019-1）
国家重点研发计划项目(2024YFF1308203) （2024YFF1308203）
新疆维吾尔自治区气象局创新发展基金项目(MS202612) （MS202612）
中国气象局—成都信息工程大学人工影响天气联合研究中心开放课题(2025RGYXTQ019) （2025RGYXTQ019）
巴音郭楞蒙古自治州气象局科研基金课题(202502) （202502）
