Application of GPS/PWV Data to Analysis Two Typhoons in Hong Kong
1〓School of Environmental Science and Spatial Informatics,China University of Mining and Technology,
1 Daxue Road, Xuzhou 221116, China
2〓Donghua Geologic Engineering and Construction Company of Yanzhou Mining Group,669 Shejiyuan Road,Zoucheng 273500,China
Abstract Based on precipitable water vapor(PWV) data from GPS, the water vapor variation characteristics of two typhoons that hit Hong Kong in 2013 are compared. The results show that GPS/PWV data can vary with the intensity of the typhoon, particularly pressure changes. Far from the typhoon, PWV showed significant changes, shocks, stronger volatility. The degree of its shock has a good relationship with rainfall intensity. Close to the typhoon, PWV has a significant change in the structure of a single peak and its humidification process has a relationship with the time and distance from the typhoon. Also a short rapid change of PWV can better reflect rainfall intensity. In summary, GPS/PWV data have some value in monitoring and forecasting typhoons.
