Authors: Yushu Zhou Chunguang Cui
Publish Date: 2011/10/18
Volume: 28, Issue: 6, Pages: 1459-
Abstract
The surface rainfall processes associated with the torrential rainfall event over Hubei China during July 2007 were investigated using a twodimensional cloudresolving model The model integrated the largescale vertical velocity and zonal wind data from National Centers for Environmental Prediction NCEP/Global Data Assimilation System GDAS for 5 days The time and model domain mean surface rain rate was used to identify the onset mature and decay periods of rainfall During the onset period the descending motion data imposed in the lower troposphere led to a large contribution of stratiform rainfall to the model domain mean surface rainfall The local atmospheric drying and transport of rain from convective regions mainly contributes to the stratiform rainfall During the mature periods the ascending motion data integrated into the model was so strong that water vapor convergence was the dominant process for both convective and stratiform rainfall Both convective and stratiform rainfalls made important contributions to the model domain mean surface rainfall During the decay period descending motion data input into the model prevailed making stratiform rainfall dominant Stratiform rainfall was mainly caused by the water vapor convergence over raining stratiform regions
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