The Noah Land Surface Model In Grapes

Many research work indicate that the land surface is very importantto medium and long-term weather and climate, but little focus onshort-term weather. The base work of this paper is to Couple NOAH landsurface model with the non-hydrostatic version GARPES-Meso (the coupledmodel is named GRAPES/NOAH). In order to study effect of land surface toshort-term heavy rain and understand the interaction of land andatmosphere, the GRAPES/NOAH is used to investigate eight heavy rainprocess in China rain season at 0.25 degree resolution.Many investigated case indicate that the NOAH land surface can enhancethe GRAPES model 's prediction ability, including amount anddistribution, especially the latter except that it is a little exaggeratethe rain domain. By investigating the case of meiyu we found thatGRAPE/NOAH can describe the daily variation of low level West-South jetand precipitation. Compare with GRAPES/SLAB and WRF, GRAPES/NOAH is thebest model to investigate the landing typhoon heavy rain case for it cankeep the energy budget in balance. Land surface model can providereasonable low boundary information for atmosphere model GRAPES, thusGRAPES/NOAH can produce better numerical prediction products than the oldone.In conclusion we can not ignore the land surface process when modelingheavy rain in China rain season, It is an worthful job for adding NOAHland surface module to GRAPE. In addition, we should pay more attentionto high-resolution land surface data and modify the NOAH scheme for ourChinese land surface characteristic...