為了瞭解夏季台灣北部午後降雨機制，本研究以WRF Model針對2008年夏季午後降雨個案進行數值模擬，共挑選3個午後強降雨個案進行天氣分析，分別為2008年6月28日、8月17日以及8月23日。研究結果顯示，數值模式可掌握北部區域午後對流胞的生成、移動到消散之環境動力與熱力機制，且發現夏季對流系統發展受北部地形影響明顯，包括環境風場與地形輻合作用、淡水和基隆河口於白天海風的建立、午後雪山山脈西側下坡風的發展，以及台北盆地日間之增溫效應等。
利用模擬氣流線變化，發現上游氣流遇中央山脈南端地形分流角度不同，於台灣北部海域合流位置也有所不同，於台灣西南海域之氣流越接近南-北走向，下游合流區越靠近台灣北方海域，若西南海域風場之西風分量較多，合流位置則較靠近宜蘭東方海域，綜觀環境流場與合流區位置不同，將影響台灣北部風場結構，進而改變對流激發型態與發展趨勢。模擬近地面風場受地形影響之強輻合帶比較，發現對流發展期近地面輻合帶位置各不相同，隨後對流發展與此時輻合帶位置有密切關係。
發現上午盆地加熱率增加，建立平原往盆地之風場，對於盆地風場變化扮演重要角色。由對流垂直結構分析，發現對流胞內有強盛上升氣流，且中層有水平強風區存在時，環流風場隨高度向水平風下游方向傾斜，並將部分雨滴帶到雲區下游，使降雨範圍延伸較廣。而海風環流與山風界面於模擬中有一鋒區存在，依空氣性質差異，區分為淡水河口至雪山山脈切面的山風鋒區，與台北盆地至基隆河口切面的海風鋒區，鋒區上方垂直速度較強，並於近地面伴隨強輻合區，因此強對流胞多發生於鋒區位置。

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