地基GPS遥测云贵高原可降水量特征

利用JICA项目在威宁、大理、昆明、丽江、临沧、勐腊、蒙自、腾冲8站的地基GPS资料分析了云贵高原上空的可降水量特征。计算和分析表明,云贵高原全年可降水量为8 253.3 mm,较为丰富,可降水量在湿季大大超过干季。夏季可降水量最大,秋季次之,春季略低于秋季,冬季最小。可降水量年内变化明显,昼夜年内变化趋势基本相同。一年之中,可降水量7月最多,2月最少。在云贵高原上空,可降水量是由北向南增加的。

Characteristics of Precipitable Water from Ground-based GPS Measurements in Yunnan-Guizhou Plateau

According to the ground-based GPS data of Weining,Dali,Kunming,Lijiang,Lincang,Mengla,Mengzi,Tengchong in JICA(Japan International Cooperation Agency) program in 2009,the characteristics of precipitable water in Yunnan-Guizhou Plateau are analyzed.The results show that the annual precipitable water in Yunnan-Guizhou Plateau is relatively abundant with 8 253.3 mm.And the precipitable water is the most in summer,followed by in autumn,then in spring,and the least in winter.Meanwhile,the precipitable water in the wet season is much more than that in the dry season.Moreover,the precipitable water varies obviously from month to month,while the monthly variation trend of the nighttime is almost the same as that of the daytime.Throughout a year,the precipitable water in July is the most,and the precipitable water in February is the least.Over the Yunnan-Guizhou Plateau,the precipitable water increases from the north to the south.