CAJ | 학술논문

利用南昌和赣州的GPS/MET资料和探空资料，对Saastamoinen、Hopfield和Black三种天顶静力延迟（ZHD）模型进行了改善，改善后的模型不仅减小模型偏差还提升了计算精度。对比分析采用改善前后的ZHD模型解算的PW （GPS PW）与探空PW发现，改善后的ZHD模型解算的GPS PW减小了与探空PW的偏差和标准差，提升了GPS PW的反演精度。运用改善后的Hopfield模型解算的GPS PW （与探空PW的偏差最小），对2012年8月7-11日台风“海葵”影响江西期间作了分析，发现降水开始于GPS PW超过60 mm后2 h；强降水出现在GPS PW的高值段；GPS PW降至60 mm以下后降水随之结束。用水汽收支方程对GPS PW诊断分析发现：在台风影响初期，比湿平流是GPS PW增加的主要原因；台风影响中期，比湿平流减小，水平风的辐合成为GPS PW增加的主要原因；台风影响后期，水平风辐合的减弱、降水过程消耗水汽是GPS PW减小的主要原因。
이용남창화공주적GPS/MET자료화탐공자료，대Saastamoinen、Hopfield화Black삼충천정정력연지（ZHD）모형진행료개선，개선후적모형불부감소모형편차환제승료계산정도。대비분석채용개선전후적ZHD모형해산적PW （GPS PW）여탐공PW발현，개선후적ZHD모형해산적GPS PW감소료여탐공PW적편차화표준차，제승료GPS PW적반연정도。운용개선후적Hopfield모형해산적GPS PW （여탐공PW적편차최소），대2012년8월7-11일태풍“해규”영향강서기간작료분석，발현강수개시우GPS PW초과60 mm후2 h；강강수출현재GPS PW적고치단；GPS PW강지60 mm이하후강수수지결속。용수기수지방정대GPS PW진단분석발현：재태풍영향초기，비습평류시GPS PW증가적주요원인；태풍영향중기，비습평류감소，수평풍적복합성위GPS PW증가적주요원인；태풍영향후기，수평풍복합적감약、강수과정소모수기시GPS PW감소적주요원인。
Three zenith hydrostatic delay (ZHD)models of Saastamoinen,Hopfield and Black are ad-justed by using sounding data and GPS/MET observations from Nanchang and Ganzhou in 201 0.These adjusted ZHD models not only reduce the model bias,but also improve the accuracy of ZHD.Compared with old ZHD models,the improved ZHD models are much closer to the sounding observations because they yield smaller bias and standard deviation from sounding data.Based on the GPS PW from Hopfield ZHD model (which has minimum bias),the typhoon “Haikui”was analyzed during 7-1 1 August 201 2 when it influenced northeast of Jiangxi.Results showed that the precipitation occurred two hours after GPS PW exceeding 60 mm,became much heavy when GPS PW was high and finally came to the end when the GPS PW was less than 60 mm.In this paper,the variation of GPS PW in Jingdezhen located northeast of Jiangxi was diagnosed using water-vapor budget equation.Results showed that in the early stage of typhoon’s influence on Jiangxi,the specific humidity advection was the main cause for the in-crease of GPS PW.In the middle stage,the specific humidity advection weakened and the convergence of horizontal wind became the main cause for the increase and maintenance of GPS PW.In the late stage, the convergence of horizontal wind reduced rapidly and the water vapor consumed by rainfall was the main reason for the decrease of GPS PW.