Synthesis Analysis of One Severe Convection Precipitation Event in Jiangsu Using Ground-Based GPS Technology
Synthesis Analysis of One Severe Convection Precipitation Event in Jiangsu Using Ground-Based GPS Technology
复制标题
利用地基GPS技术对江苏一次强对流降水事件的综合分析
DOI：
10.3390/atmos6070908
复制
发表时间：
2015-07-01
期刊：
影响因子：
2.9
通讯作者：
Zhang, Zhendong
中科院分区：
文献类型：
--
作者：
Wang, Hao;He, Jianxin;Zhang, Zhendong
全球定位系统（GPS）检测技术具有几个有利的特性（即，全天候应用、高精度、高时空分辨率、低成本），以及GPS水汽跟踪监测技术近年来发展迅速。利用该技术反演得到的GPS可降水量（GPS-PWV）可以近实时地反映一定区域上方垂直气柱中的水汽进出情况，这对于水汽变化剧烈的地区尤为重要。本文研究了GPS-PWV变化与实际降水量的关系。具体的目的是确定潜在的物理机制驱动的变化，并进一步加强实用的GPS-PWV的预报和警报的强对流天气。结果表明：（1）长期低层GPS-PWV的快速上升预示着降水的到来，在天气预报中具有重要意义;（2）GPS-PWV的变化与水汽输送带的移动密切相关;（4）局地运动与降水的发展和维持密切相关。
Global positioning system (GPS) detection technology has several advantageous characteristics (i.e., all-weather applications, high accuracy, high spatial and temporal resolution, and low cost), and GPS tracking and monitoring techniques for water vapor have developed rapidly in recent years. The GPS-precipitable water vapor (GPS-PWV), obtained through inversion using this technology can reflect the water vapor inflow and outflow in a vertical air column above a certain area in nearly real-time, which is especially important for areas of severe water vapor variation. In this paper, we studied the relationship between GPS-PWV variation and actual precipitation. The specific aim was to identify the underlying physical mechanisms driving the variation and to further strengthen the utility of GPS-PWV in forecasts and warnings of severe convection weather. We concluded that (1) rapid rise in the GPS-PWV in the long-term low-level data predicted the arrival of precipitation and was therefore useful in weather forecasts; (2) the GPS-PWV variation was closely related with the movement of the water vapor transfer belt; (3) the atmosphere showed an unstable energy structure before the GPS-PWV increase; and (4) local motion was strongly related with the development and maintenance of precipitation.