NAME =  Dr. Kozo Nakamura  
ORGANIZATION =  Frontier Research Center for Global Change/Ocean Research Institute University of Tokyo  
ADDRESS =  1-15-1, Minamidai, Nakano-Ku, Tokyo, 164-8639  
COUNTRY =  Japan  
PHONE =  +81-3-5351-6524  
FAX =  +81-3-3377-3395  
E-MAIL =  nakamura@ori.u-tokyo.ac.jp  
POSTER_ONLY =  no  
THEME =  T2  
DATE =  27-Jul-04-14:40:17  
ABSID = T2DKN27Jul04144017 
TITLE = A numerical study of mesoscale precipitating system along Meiyu Front observed during GAME-HUBEX 1998 
AUTHOR_1 = K. Nakamura 
INSTITUTION_1 = Frontire Research Center for Global Change/Ocean Research Institute, University of Tokyo 
PRESENTER = AUTHOR_1 
AUTHOR_2 = Y. Fujiyoshi 
INSTITUTION_2 = Frontire Research Center for Global Change/Institute of Low Temperature Science, Hokkaido University 
ABSTRACT = In order to improve our understanding of the mesoscale organization processes, we performed a numerical experiment of the disturbance observed near Fuyuang radar site (115.83 E, 32.93 N) on July 2nd, 1998, during GAME/HUBEX 98.
The model used in this study is Non Hydrostatic Model (NHM) developed by MRI. We performed two runs using two datasets, i.e., the GAME-Reanalysis and ECMWF data set, for initial and boundary conditions, and we investigate the organizing process by comparing the results of two runs.  

In both runs, the model successfully reproduced the development of the 
large-scale horizontal shear, convergence, and the precipitation along 
the Mei-yu front.  However, the disturbance of the GAME-Reanalysis run 
was too strong and moved too fast to the northeastward, and after its 
movement there is no intense convection.  On the other hand, in the ECMWF run, there occurred many convection systems along the front region and properly reproduced the persistent heavy rainfall area.  We preformed several experiments (the wetness parameter w=0.1 and w=1.0) to investigate the effect of the surface conditions.  It is shown that although the effect of the wetness parameter on the boundary layer structure is large, its effect on the convective activity seems to be small.