主办单位:中国气象局沈阳大气环境研究所
国际刊号:ISSN 1673-503X
国内刊号:CN 21-1531/P

气象与环境学报 ›› 2023, Vol. 39 ›› Issue (2): 28-34.doi: 10.3969/j.issn.1673-503X.2023.02.004

• 论文 • 上一篇    下一篇

2020—2021年沈阳地区4次短时强降水过程的大气可降水量变化对比分析

徐爽1(),胡鹏宇2,贾越3,崔劲松1,*(),杨磊2,李崇1,王东东4,侯婉婷1   

  1. 1. 沈阳市气象局, 辽宁沈阳 110168
    2. 辽宁省气象灾害监测预警中心, 辽宁沈阳 110166
    3. 中国气象局气象干部培训学院辽宁分院, 辽宁沈阳 110166
    4. 中国气象局沈阳大气环境研究所, 辽宁沈阳 110166
  • 收稿日期:2022-01-05 出版日期:2023-04-28 发布日期:2023-05-20
  • 通讯作者: 崔劲松 E-mail:xu249630504@163.com;75875379@qq.com
  • 作者简介:徐爽, 女, 1990年生, 工程师, 主要从事短期预报预警研究, E-mail: xu249630504@163.com

Comparative analysis of changes in atmospheric precipitable water during four short-time heavy rainfall processes in Shenyang from 2020 to 2021

Shuang XU1(),Peng-yu HU2,Yue JIA3,Jin-song CUI1,*(),Lei YANG2,Chong LI1,Dong-dong WANG4,Wan-ting HOU1   

  1. 1. Shenyang Meteorological Service, Shenyang 110168, China
    2. Liaoning Meteorological Disaster Monitoring and Early Warning Center, Shenyang 110166, China
    3. Liaoning Branch of China Meteorological Administration Training Center, Shenyang 110166, China
    4. Institute of Atmospheric Environment, China Meteorological Administration, Shenyang 110166, China
  • Received:2022-01-05 Online:2023-04-28 Published:2023-05-20
  • Contact: Jin-song CUI E-mail:xu249630504@163.com;75875379@qq.com

摘要:

选取2020—2021年夏季沈阳地区出现的4次短时强降水过程, 利用欧洲中心(ECMWF, European Center for Medium-Range Weather Forecasts)ERA5再分析资料、地基GPS(Global Position System)大气可降水量资料和常规观测资料, 分析不同天气系统影响下, 沈阳地区短时强降水过程中GPS水汽与水汽通量的变化特征。结果表明: 短时强降水过程前, 水汽累积时间的长短与相应的天气系统关系密切。副热带高压系统外围导致的强降水过程, 大气可降水量(Precipitable Water Vapor, PWV)可以一直维持在较高水平, 水汽增长速度可达1.1 mm·h-1。此外, 强降水出现时段与PWV峰值阶段相对应, 但二者峰值并不完全重合; 短时强降水出现时, 沈阳站的大气可降水量超过38 mm; 强降水结束后, PWV明显减弱。

关键词: 短时强降水, 地基GPS, 水汽通量

Abstract:

Based on the ECMWF (European Center for Medium-Range Weather Forecasts) ERA5 reanalysis data, GPS (Global Position System) precipitable water vapor observations, and conventional observation data, the variation characteristics of atmospheric PWV (Precipitable Water Vapor) and water vapor flux during four short-time heavy rainfall processes from 2020-2021 under different weather systems in Shenyang were analyzed. The results show that the duration of water vapor accumulation is closely related to the corresponding weather system.PWV can be maintained at a relatively high level in the heavy rainfall process caused by the periphery of the subtropical high system, and the water vapor growth rate can reach 1.1 mm·h-1.In addition, the occurrence period of heavy rainfall corresponds with the peak of PWV, but the peaks of the two do not coincide completely.When short-time heavy rainfall occurs, the atmospheric precipitable water at Shenyang station reaches more than 38 mm.After the end of heavy rainfall, PWV weakens obviously.

Key words: Short-time severe rainfall, Ground-based GPS, Water vapor flux

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