A Comparison of Two Heavy Rainfall Events during the Terrain-Influenced Monsoon Rainfall Experiment (TiMREX) 2008
A Comparison of Two Heavy Rainfall Events during the Terrain-Influenced Monsoon Rainfall Experiment (TiMREX) 2008
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DOI：
10.1175/mwr-d-13-00293.1
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发表时间：
2014-06
影响因子：
3.2
通讯作者：
Chuan-Chi Tu;Yi-Leng Chen;Ching-Sen Chen;P. Lin;Po-Hsiung Lin
中科院分区：
文献类型：
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作者：
Chuan-Chi Tu;Yi-Leng Chen;Ching-Sen Chen;P. Lin;Po-Hsiung Lin
摘要采用观测和数值模拟相结合的方法，对台湾初夏雨季的两次局地暴雨事件与迎风山脉和海岸的日最大雨量进行了对比研究和比较。这两次事件都是在有利的大范围环境下发生的，包括来自热带的潮湿舌头的存在。就5月31日的情况而言，一道浅的地面锋面经过台湾中部后，下午数小时在西南部迎风的斜坡上有暴雨。盛行的温暖、潮湿的西南偏西风气流在地形上高空抬升，再加上地面上的海风上升气流，提供了发展强降水所需的局部抬升。6月16日日出前，由于夜间和降雨的蒸发冷却，低层相对冷空气的存在，使温暖、潮湿的西南风气流受到明显的地形阻挡。因此，对流系统……
AbstractTwo contrasting localized heavy rainfall events during Taiwan’s early summer rainy season with the daily rainfall maximum along the windward mountain range and coast were studied and compared using a combination of observations and numerical simulations. Both events occurred under favorable large-scale settings including the existence of a moisture tongue from the tropics. For the 31 May case, heavy rainfall occurred in the afternoon hours over the southwestern windward slopes after a shallow surface front passed central Taiwan. The orographic lifting of the prevailing warm, moist, west-southwesterly flow aloft, combined with a sea breeze–upslope flow at the surface provided the localized lifting needed for the development of heavy precipitation. On 16 June before sunrise, pronounced orographic blocking of the warm, moist, south-southwesterly flow occurred because of the presence of relatively cold air at low levels as a result of nocturnal and rain evaporative cooling. As a result, convective sys...