Hourly rainfall distribution in east Malaysia during the southwest monsoon season

Abstract

The hourly rainfall pattern during the southwest (SW) monsoon season is addressed. For this purpose, hourly rainfall data of nine selectedstations are analyzed. The study period was thirtyone years. The results of this investigation show that four main mechanisms are responsible for the daily rainfall distribution in East Malaysia. . These mechanisms are: (a) convergence of land breezes, (b) increase of the atmospheric lapse rate during the night, (c) convection and (d) sea breeze. For example, these four mechanisms may be important in a particular station in a given month and not in the following one or the precedent one. Or it may just be that one mechanism is important for a different station in a given month.

Se presenta la distribución horaria de precipitación en nueve estaciones localizadas en el Este de Malasia durante el Monsoon del Sudeste. El período de estudios consta de 31 años. Los resultados de la investigación muestran cuatro factores que afectan la precipitación en esa zona, pero estos no afectan en la misma estación del año ni simultáneamente en las mismas estaciones. Estos factores son: a) convergencia ocasionada por la brisa de tierra, b) incremento de del gradiente vertical de temperatura.