华南沿海暴雨日变化特征的初步诊断
he preliminary diagnosis about the diurnal variation of rainfall over south china
本文利用2006年6月的热带测雨卫星（TRMM）的 3B42降水率资料以及广州东部八站的降水量及地面气压资料分析华南沿海地区降水的日变化特征，发现陆地上的降水多发生于12-24LST时段，近海海域降水多集中于00-12LST时段。利用傅立叶谐波分解方法进行波动的诊断分析，发现6月8，9日的暴雨中存在周期12h的重力波，降水量也有周期12h的高频振荡。暴雨日变化与重力波有很好对应关系，重力波可能对降水的日变化有重要影响。
his investigation seek a understanding of the characteristic of precipitation’s diurnal variation in south china based on the use of tropical rainfall measuring mission (trmm) 3b42 rain rate dataset , the rainfall and the surface pressure data of eight stations in Guang Dong province. The results reveal that the prominent precipitation occurred between 12-24LST over land and the dominant rainfall in 00-12LST over ocean. The results of diagnostic analysis based on the Fourier transform shows that distinct twelve hours period gravity waves occurred in the rainfall process between June 8tn and June 9th, and the precipitation have a vacillation at 12 hours oscillation period. The grave waves perhaps make an important impact of the precipitation’s diurnal cycle.
邵海燕、陆维松、陶丽、邱明宇、蔡晶、陈汇林
大气科学（气象学）
华南沿海，暴雨，日变化，重力波
South China the Diurnal variation of rainfall Gravity Waves
邵海燕,陆维松,陶丽,邱明宇,蔡晶,陈汇林.华南沿海暴雨日变化特征的初步诊断[EB/OL].(2007-12-19)[2025-08-16].http://www.paper.edu.cn/releasepaper/content/200712-426.点此复制
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