期刊
SOLA
卷 1, 期 -, 页码 205-208出版社
METEOROLOGICAL SOC JAPAN
DOI: 10.2151/sola.2005-053
关键词
-
资金
- Ministry of Education Culture, Sports, Science and Technology (MEXT), Japan [B-2-15340157]
- Kyoto University
- Category 7 of MEXT [RR2002]
The diurnal variation of precipitation over the Bengal region is numerically investigated using a non-hydrostatic mesoscale model. We focused on northeastern Bangladesh, where the maximum of late night-early morning precipitation is observed. Simulated characteristics of diurnal variation of precipitation agree, to a large extent, with observable evidence. The mechanism of the high late night-early morning precipitation in a case of June 14 to 21 is investigated using the model results. At night, strong southwesterly monsoon winds transport a large amount of moisture over Bangladesh. This high equivalent potential temperature (theta(e)) air mass climbs the slope of the Meghalaya Plateau or climbs over a deep (several hundreds meters to 1 km) pool of cold air, and triggers precipitation over northeastern Bangladesh. The triggered systems develop into mesoscale squall lines and propagate southward or southsouthwestward at a speed of about 10 m s(-1). It is found that the katabatic mountain wind is not a major player in the diurnal variation of precipitation over the northeastern Bangladesh area.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据