Mesoscale Processes for Super Heavy Rainfall of Typhoon Morakot (2009) Over Southern Taiwan
Atmos. Chem. Phys., 11, 345–361, 2011 www.atmos-chem-phys.net/11/345/2011/ Atmospheric doi:10.5194/acp-11-345-2011 Chemistry © Author(s) 2011. CC Attribution 3.0 License. and Physics Mesoscale processes for super heavy rainfall of Typhoon Morakot (2009) over Southern Taiwan C.-Y. Lin1, H.-m. Hsu2, Y.-F. Sheng1, C.-H. Kuo3, and Y.-A. Liou4 1Research Center for Environmental Changes, Academia Sinica, Taipei, Taiwan 2National Center for Atmospheric Research, Boulder, Colorado, USA 3Department of Geology, Chinese Culture University, Taipei, Taiwan 4Center for Space and Remote Sensing Research, National Central University, Jhongli, Taiwan Received: 20 April 2010 – Published in Atmos. Chem. Phys. Discuss.: 27 May 2010 Revised: 10 December 2010 – Accepted: 29 December 2010 – Published: 14 January 2011 Abstract. Within 100 h, a record-breaking rainfall, typhoon Morakot (2009) traversed the island of Taiwan over 2855 mm, was brought to Taiwan by typhoon Morakot in Au- 5 days (6–10 August 2009). It was the heaviest total rain- gust 2009 resulting in devastating landslides and casualties. fall for a single typhoon impinging upon the island ever Analyses and simulations show that under favorable large- recorded. This typhoon has set many new records in Tai- scale situations, this unprecedented precipitation was caused wan. Nine of the ten highest daily rainfall accumulations first by the convergence of the southerly component of the in the historical record were made by typhoon Morakot, ac- pre-existing strong southwesterly monsoonal flow and the cording to the Central Weather Bureau (CWB). Among them, northerly component of the typhoon circulation.
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