Simulation of a Himalayan cloudburst event

Journal of Earth system science

Raghavendra Ashrit1²  Someshwar Das1²  M W Moncrieff2¹ 

[1] National Center for Atmospheric Research, Boulder CO 80301, USA.$$;National Center for Medium Range Weather Forecasting, Noida 201 307, India.$$

关键词: Cloudburst;    flash floods;    mesoscale;    tropical rainfall measuring mission.;   

DOI  :  

学科分类：天文学(综合)

来源: Indian Academy of Sciences

【 摘 要 】

Intense rainfall often leads to floods and landslides in the Himalayan region even with rainfall amounts that are considered comparatively moderate over the plains;for example,‘cloudbursts ’, which are devastating convective phenomena producing sudden high-intensity rainfall (∼10 cm per hour)over a small area.Early prediction and warning of such severe local weather systems is crucial to mitigate societal impact arising from the accompanying flash floods.We examine a cloudburst event in the Himalayan region at Shillagarh village in the early hours of 16 July 2003.The storm lasted for less than half an hour, followed by flash floods that affected hundreds of people.We examine the fidelity of MM5 con figured with multiple-nested domains (81,27,9 and 3 km grid-resolution)for predicting a cloudburst event with attention to horizontal resolution and the cloud microphysics parameterization.The MM5 model predicts the rainfall amount 24 hours in advance. However,the location of the cloudburst is displaced by tens of kilometers.

【 授权许可】

Unknown