CAJ | 학술논문

对1970-2006年汛期(4-9月)发生在华南西部(广西)的重大锋面暴雨天气过程进行分析研究.结果表明:华南西部重大锋面暴雨天气平均每年汛期出现10d,暴雨过程日数月总值分布具有明显的"单峰型"特征,峰值出现在6月;广西北部地区发生重大锋面暴雨天气过程比南部地区明显偏多;造成华南西部重大锋面暴雨过程的天气形势特征主要有五种类型:湘黔桂低涡型、深槽型、波动型、华北槽+南支槽型和南支槽+高后型;广西区域的925 hPa的水汽通量散度、850hPa垂直速度和θ_(se500～850)等物理量场,较好地反映了华南西部大范围锋面暴雨天气过程物理量场的变化,可作为华南西部重大锋面暴雨天气过程的物理强信号和预报着眼点.
대1970-2006년신기(4-9월)발생재화남서부(엄서)적중대봉면폭우천기과정진행분석연구.결과표명:화남서부중대봉면폭우천기평균매년신기출현10d,폭우과정일수월총치분포구유명현적"단봉형"특정,봉치출현재6월;엄서북부지구발생중대봉면폭우천기과정비남부지구명현편다;조성화남서부중대봉면폭우과정적천기형세특정주요유오충류형:상검계저와형、심조형、파동형、화북조+남지조형화남지조+고후형;엄서구역적925 hPa적수기통량산도、850hPa수직속도화θ_(se500～850)등물리량장,교호지반영료화남서부대범위봉면폭우천기과정물리량장적변화,가작위화남서부중대봉면폭우천기과정적물리강신호화예보착안점.
This paper researches the significant front rainstorm weather process in the west of South China (Guangxi) in flood season (April to September) from 1970 to 2006. The result shows that: the significant front rainstorm weather process in the west of South China happen 10 days every year averagely, the distribution of the total days of rainstorm every month has the characteristic "Single peak" obviously, and the peak value happens at June. And the north of Guangxi has more front rainstorm weather process than south of that area. There are five kinds of synoptic situation that cause the significant front rainstorm weather process in the west of South China: model with low eddy in Hunan, Guizhou and Guangxi, model with deep trough, model with several small troughs, model with trough in North China and trough in south of green grass, model with trough in south of green grass and high at ocean. Physical quantity in Guangxi such as moisture flux at 925 hPa, omega at 850 hPa and △θ_(se500～850) can reflect the change of the physical quantity in the significant front rainstorm weather process in the west of South China, and can be the main physical signals and focus of forecast