Observation on anisotropy in moisture distribution with GPS during the passage of a squall line
作者单位：Constellation Observing System for Meteorology Ionosphere ＆ Climate（COSMIC）University Corporation for Atmospheric Research（UCAR）!BoulderColoradoUSA
会议名称：《2011年海峡两岸气象科学技术研讨会》
会议日期：2011年
学科分类：07[理学] 070601[理学-气象学] 0706[理学-大气科学]
基 金：funded by the National Science Fundation of China grant 40705009 & 40905052 by the National Science and Technology Supporting Programs in the 11th Five-Year Plan grant 2008BAC37B03 of the Ministry of Science and Technology of China
关 键 词：Global Positioning System water vapor radiometer slant water vapor precipitable water vapor squall line
摘 要：正Slant water vapor（SWV） measurements from a ground-based global positioning system（GPS） instrument can provide accurate,high temporal-resolution and multi-directional water vapor information for moisture variation *** this study,the preliminary comparison for GPS SWV measurements against water vapor radiometer（WVR） shows that GPS SWV measurements are *** compared vertical SWV（VSWV） observations against precipitable water vapor（PWV） measurements from a GPS receiver located at the south of Beijing（54511 station） during the passage of a squall *** found that VSWV observations display more variations than PWV measurements in moisture *** also compared the temporal difference of VSWV observations between individual GPS *** found obvious spatial anisotropy in moisture distribution during the passage of the squall *** results suggest that SWV observations are very valuable in the analysis and construction of accurate moisture distribution.