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2007•Journal of Tropical MeteorologyRequires access

NUMERICAL SIMULATION AND MESOSCALE ANALYSIS OF A TORRENTIAL RAIN CAUSED BY TYPHOON

Zheng Lun-wei

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Abstract

A heavy storm rainfall,caused by Typhoon AERE when landing at Fujian,has been successfully simulated by using AREM model.The simulation result is scale-separated by spatial band-pass filtering,which reveals the mesoscale low pressure and convergence line that had direct impact on this rainfall process.The physical characteristics of the two mesoscale systems and their relation with rainfall is also analyzed.Study shows that there exists a well corresponding relationship between the storm rainfall and mesoscale divergence and strong updraft arising from convergence,which is caused by the interactions between the mesoscale systems and topographic features,is directly responsible for the rainfall.

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What this paper is about

A heavy storm rainfall,caused by Typhoon AERE when landing at Fujian,has been successfully simulated by using AREM model.The simulation result is scale-separated by spatial band-pass filtering,which reveals the mesoscale low pressure and convergence line that had direct impact on this rainfall process.The physical characteristics of the two mesoscale systems and their relation with rainfall is also analyzed.Study shows that there exists a well corresponding relationship between the storm rainfall and mesoscale divergence and strong updraft arising from convergence,which is caused by the interactions between the mesoscale systems and topographic features,is directly responsible for the rainfall.

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Available abstract

A heavy storm rainfall,caused by Typhoon AERE when landing at Fujian,has been successfully simulated by using AREM model.The simulation result is scale-separated by spatial band-pass filtering,which reveals the mesoscale low pressure and convergence line that had direct impact on this rainfall process.The physical characteristics of the two mesoscale systems and their relation with rainfall is also analyzed.Study shows that there exists a well corresponding relationship between the storm rainfall and mesoscale divergence and strong updraft arising from convergence,which is caused by the interactions between the mesoscale systems and topographic features,is directly responsible for the rainfall.

Key concepts: Mesoscale meteorology, Typhoon, Climatology, Storm, Meteorology, Environmental science, Geology, Geography

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