[AAS03-P09] The Study on the Interactions between Meigi (2010)Typhoon Outer Circulation and Topography in Northeast of Taiwan
Keywords:WRF Model, Typhoon Meigi, Northeasterly Monsoon, Returning Flow
The terrain of the bell mouth of the Lanyang Plain enhances the strength of the northeast monsoon. Affected by the terrain, low-level convergence occurs when the low-level airflow produces returning flow. Convergence of the lifting effect makes significant precipitation in the area. This study summarizes the heavy precipitation produced by Meigi typhoon in Yilan area, which may be mainly dominated by two kinds of physical mechanisms. The first is the elevation of the terrain and the effect of low-level returning flow in front of mountains. This mechanism has been successfully simulated and analyzed in this study. The second one is the mechanism of quasi frontogenesis. We can see the existence of this mechanism in this study.