Atmospheric Water Monitoring by Using Ground-Based GPS during Heavy Rains Produced by TPV and SWV
Atmospheric Water Monitoring by Using Ground-Based GPS during Heavy Rains Produced by TPV and SWV
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DOI：
10.1155/2013/793957
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发表时间：
2013-12
影响因子：
2.9
通讯作者：
Guoping Li;Jiarong Deng
中科院分区：
文献类型：
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作者：
Guoping Li;Jiarong Deng
通过试验和业务应用，确定了成都平原30 min间隔的可降水量时间序列。本研究首次利用2010年夏季西南涡强化试验资料，将PW应用于西南涡和暴雨过程。利用当地地基GPS网的PW资料，对西南涡和高原低涡造成的暴雨进行了监测和分析。结果表明，GPS可降水量（GPS-PW）的增加发生在TPV和SWV的发展之前，降雨主要发生在高水平的GPS-PW。不同天气系统引起的青藏高原降水过程中GPS-PW的演变特征也不同。这些结果为GPS-PW资料在高影响天气短期预报和临近预报中的业务应用提供了参考价值，同时也为进一步研究TPV、SWV等强天气系统造成的TP暴雨提供了参考。
The time series of precipitable water (PW) in 30 min intervals has been determined through experimentation and operational application of a ground-based global positioning system (GPS) network in Chengdu Plain, which is used for precise and reliable meteorological research. This study is the first to apply PW to the southwest vortex (SWV) and heavy rain events by using the data from an intensive SWV experiment conducted in summer 2010. The PW derived from the local ground-based GPS network was used in the monitoring and analysis of heavy rain caused by the SWV and the Tibetan Plateau vortex (TPV). Results indicate that an increase in GPS precipitable water (GPS-PW) occurs prior to the development of the TPV and SWV; rainfall occurs mainly during high levels of GPS-PW. The evolution features of GPS-PW in rainfall process caused by different weather systems over the Tibetan Plateau (TP) also differ. These results indicate the reference values for operational applications of GPS-PW data in short-term forecasting and nowcasting of high-impact weather in addition to further investigation of heavy rain caused by the TPV, SWV, and other severe weather systems over the TP.