摘要
利用2005年4月—2006年10月石家庄、秦皇岛和张家口三个地基GPS站的观测资料和地面气象资料,根据GPS反演可降水量的原理以及可降水量与地面水汽压的线性对应关系,对不同站点、不同时次的大气可降水量进行了解算和补算,并对河北省GPS可降水量的时空分布特征进行了分析。结果表明:可降水量在时间上先升后降,7、8月达到最大值;在空间上由北向南递增;可降水量的日变化特征不十分显著,仅表现为小幅度波动。
By using ground-based GPS and surface meteorological data from April 2005 to October 2006 in Shijiazhuang, Qinkuangdao and Zhuangjiakou, according to the principle of ground-based GPS/ MET, and the good linear relationship between precipitable water vapor and surface vapor pressure in North China, precipitable water vapor of different stations and different times are calculated, on the basis of the above analysis, the temporal and spatial distribution features of precipitable water vapor in GPS in North China are analyzed. It has been found that precipitable water vapor showed increase-to-decrease trend in the temporal distribution, the maximum occurred in July or August; the general trend is decreasing from south to north in the spatial distribution; the diurnal variation is not remarkable, it is not more than small ripples.
出处
《气象科学》
CSCD
北大核心
2008年第4期389-394,共6页
Journal of the Meteorological Sciences
基金
中国气象局成都区域气象中心区域重大科研业务项目(2007-11)
中国气象局“京津冀地区地基GPS大气汽观测资料应用研究”
关键词
地基GPS
可降水量
时空分布
Ground-based GPS Precipitable water vapor Temporal-spatial distribution
