High-resolution simulation of a nocturnal narrow convective line off the southeastern coast of Taiwan in the Mei-yu season

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题名:	High-resolution simulation of a nocturnal narrow convective line off the southeastern coast of Taiwan in the Mei-yu season
作者:	Wang, CC (Wang, Chung-Chieh) Huang, WM (Huang, Wei-Ming)
贡献者:	大氣系
关键词:	RADAR OBSERVATIONS CLOUD
日期:	2009-03
上传时间:	2011-12-07 11:55:44 (UTC+8)
摘要:	This study performed high-resolution numerical simulation on a convective line that occurred roughly 10-30 km offshore of southeastern Taiwan overnight of 14-15 May 1998. Three experiments at successively higher resolution (10, 2, and 0.5 km) but smaller domain were carried out, and the narrow line is eventually reproduced. It is found that shallow (offshore) return flow along the coast appeared since daytime due to topographic blocking on the weak prevailing (onshore) south-southeasterly wind, producing convergence at their interface near shore. During the night, mountain breeze further strengthened the offshore flow and convergence, and the line initiated. Once developed, downdrafts and outflow boundaries from old clouds triggered new clouds, and this was more active along the (eastern) boundaries against the undisturbed environmental flow. Thus, repeated new cloud formation took place throughout the night and into the next morning. Citation: Wang, C.-C., and W.-M. Huang (2009), High-resolution simulation of a nocturnal narrow convective line off the southeastern coast of Taiwan in the Mei-yu season, Geophys. Res. Lett., 36, L06815, doi:10.1029/2008GL037147.
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