利用湖南CORS网监测分析湘北一次局地暴雨水汽场时空变化
发布时间：2018-12-31 09:02
【摘要】：基于72个湖南连续运行参考站(CORS)反演得到的可降水量(PWV),针对2015-04-03~04-04湘北地区一次局地暴雨,结合温度和气压等大气热动力条件,分析湖南省PWV时间序列及其平面动态分布变化,并总结此次暴雨过程中水汽场变化规律。研究结果表明,作为降水的必要条件,PWV峰值越大降水概率越高,当PWV突破48mm并首次降低时,随后1h内会出现降水;当PWV持续增强达到峰值50mm之后再次下降时,PWV增量变化很大程度上决定着雨势的大小及降雨持续时长;气温和气压等热动力条件也对雨势预测有一定的指示作用;PWV分布变化可对实际降水范围(落区)趋势作出较为准确的预测。
[Abstract]:Based on the (CORS) inversion of 72 continuous operation reference stations in Hunan Province, the precipitable water (PWV), is obtained for a local rainstorm in the northern Hunan region of 2015-04-0304-04, combined with atmospheric thermodynamic conditions such as temperature and atmospheric pressure. The PWV time series and its plane dynamic distribution in Hunan Province are analyzed, and the variation law of water vapor field during the torrential rain is summarized. The results show that, as a necessary condition of precipitation, the higher the PWV peak value is, the higher the precipitation probability is. When PWV breaks through 48mm and decreases for the first time, precipitation will occur within 1 hour. When PWV continues to increase to the peak value of 50mm and then decrease again, the increment of PWV largely determines the magnitude of rain intensity and the duration of rainfall, and the thermal dynamic conditions such as temperature and pressure can also indicate the forecast of rain intensity. The variation of PWV distribution can accurately predict the trend of actual precipitation range (falling area).
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本文编号：2396359
[Abstract]:Based on the (CORS) inversion of 72 continuous operation reference stations in Hunan Province, the precipitable water (PWV), is obtained for a local rainstorm in the northern Hunan region of 2015-04-0304-04, combined with atmospheric thermodynamic conditions such as temperature and atmospheric pressure. The PWV time series and its plane dynamic distribution in Hunan Province are analyzed, and the variation law of water vapor field during the torrential rain is summarized. The results show that, as a necessary condition of precipitation, the higher the PWV peak value is, the higher the precipitation probability is. When PWV breaks through 48mm and decreases for the first time, precipitation will occur within 1 hour. When PWV continues to increase to the peak value of 50mm and then decrease again, the increment of PWV largely determines the magnitude of rain intensity and the duration of rainfall, and the thermal dynamic conditions such as temperature and pressure can also indicate the forecast of rain intensity. The variation of PWV distribution can accurately predict the trend of actual precipitation range (falling area).
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本文编号：2396359
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