摘要
应用GPS探测的可降水资料PWV对香港地区2013年遭遇的两次台风中水汽变化特征进行对比分析表明,GPS/PWV资料在一定程度上能反映出不同距离台风影响强度,尤其是气压变化。远距离台风,PWV呈现明显的震荡性变化,波动性更强,且震荡程度与降雨强度有很好的对应关系;近距离台风,PWV呈明显的单峰结构变化,增湿过程与台风影响时间及距离存在某种关系,PWV短时间内急升变化幅度能较好地反映降水强度。
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.
出处
《大地测量与地球动力学》
CSCD
北大核心
2015年第2期298-302,共5页
Journal of Geodesy and Geodynamics
基金
国家自然科学基金(51174206)
江苏省高校优势学科建设工程(SZBF2011-6-B35)
关键词
GPS探测
台风
水汽
单峰结构
降水强度
监测
GPS detection
typhoon
precipitable water vapor
structure of a single peak
rainfall intensity
monitoring
