Synthesis Analysis of One Severe Convection Precipitation Event in Jiangsu Using Ground-Based GPS Technology

Atmosphere

Hao Wang¹  Jianxin He⁴  Ming Wei²  Zhendong Zhang³ 

[1] College of Meteorological Observation, Chengdu University of Information Technology, Chengdu 610225, China;Key Laboratory of Meteorological Disasters, Ministry of Education, Nanjing University of Information Science and Technology, Nanjing 210044, China; E-Mail:;Meteorological Service Center of Jiangsu Province, Jangsu Meteorological Bureau, Nanjing 210008, China; E-Mail:;Key Laboratory of Atmosphere Sounding, China Meteorological Administration, Chengdu 610225, China; E-Mail:

关键词: convection precipitation;    GPS-PWV;    physical mechanism;    synthesis analysis;   

DOI  :  10.3390/atmos6070908

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.