Intraseasonal variability and its impacts to the diurnal cycle over the monsoonal Asia

本研究揭示了中南半岛半岛地区与季节内变率有关的几种大气扰动引起的降水变率的水平分布。在雨季，起源于赤道印度洋的30-60天的变率仅在南北方向山脉以西造成降雨波动，而向西传播的涡旋扰动可在山脉两侧造成降雨。本研究亦探讨秋季越南中部一次强降雨事件的成因，以探讨中纬度冷涌传播如何造成此次强降雨。

This study reveals horizontal distribution of rainfall variability caused by several types of atmospheric disturbances related to the intraseasonal variability over the Indochina Peninsula. During the rainy season, 30-60-day variability originated in the equatorial Indian Ocean causes rainfall fluctuation only to the west of mountain ranges lying in the north-south direction, while westward-propagating vortex disturbances can produce rainfall in both sides of the ranges. This study also investigates causes of a heavy rainfall event in central Vietnam in autumn to discuss how a cold surge propagating from mid-latitudes causes the heavy rainfall.