CAJ | 학술논문

利用GMS-5卫星红外分裂窗通道和水汽通道资料反演晴空大气的可降水分布,同时利用探空站资料和地面站资料估算云天大气的可降水分布.将这两种方法进行融合,得到淮河流域能量与水分循环试验期间全天候的大气可降水分布.结果表明,这种新的融合技术可应用于确定大尺度或全球尺度的大气可降水分布图像.揭示了江淮流域1998年梅雨盛行期大气中的水汽主要来源于西南方向.充足的大气可降水是产生地面降水的必要条件,在某些动力条件的影响下,空中的大气可降水将部分地被转化为地面降水.给出了几种主要的降水类型,分析了相应的大气可降水条件及其特征,并剖析了产生降水的大气动力条件.结果显示,地面降水中心通常并非出现在大气可降水的高值中心区域而是产生在其下风方向的某一区域.
이용GMS-5위성홍외분렬창통도화수기통도자료반연청공대기적가강수분포,동시이용탐공참자료화지면참자료고산운천대기적가강수분포.장저량충방법진행융합,득도회하류역능량여수분순배시험기간전천후적대기가강수분포.결과표명,저충신적융합기술가응용우학정대척도혹전구척도적대기가강수분포도상.게시료강회류역1998년매우성행기대기중적수기주요래원우서남방향.충족적대기가강수시산생지면강수적필요조건,재모사동력조건적영향하,공중적대기가강수장부분지피전화위지면강수.급출료궤충주요적강수류형,분석료상응적대기가강수조건급기특정,병부석료산생강수적대기동력조건.결과현시,지면강수중심통상병비출현재대기가강수적고치중심구역이시산생재기하풍방향적모일구역.
GMS-5 satellite data at channels of infrared split windows and water vapor are analyzed to retrieve the precipitable water (PW) distributions under cloud-free conditions. Radiosonde data and surface station data are applied to estimate the PW distributions under cloudy conditions. These two methods are then merged to obtain the PW distributions under ali-weather conditions during the Huaihe River Basin Energy and Water Cycle Experiment (HUBEX). The results of the all-weather PW distributions from these methods demonstrate that this new merging technique may be applied to derive large-scale or global maps of PW. It is revealed that the atmospheric water vapor over the Yangtze-Huaihe River Basins came mainly from the southwest during the 1998 prevailing period of Meiyu. Sufficient atmospheric PW is a necessary condition for ground rainfall. Under certain dynamic conditions, it can be partially transformed into surface precipitation. Several types of rain are displayed and their PW conditions and characteristics,as well as atmospheric dynamic conditions, are analyzed. It is demonstrated that surface precipitation centers usually appear not at the high PW centers but on their downwind sides.