Evaluation of the Performance of Mesoscale Model 5 (MM5) and Simple Biosphere Model 2 (SiB2) over GAME/Tibet area in 1998
Gao Zhiqiu (1)
(1) Chinese Academy of Meteorological Sciences, CMA, China
The authors conduct simulations by the Mesoscale Model 5 (MM5) and the Simple Biosphere model 2 (SiB2) over GAME/Tibet area (30-35N, 90-95E) during the GAME/Tibet-IOP in 1998. SiB2 id forced six variables (i.e., downward short-wave radiation at the surface, downward long-wave radiation at the surface, vapor pressure at certain reference height within the near surface atmospheric layer, air temperature, wind speed at the same height as vapor, precipitation). On the situation of space-time simulation by using SiB2 in this paper, the space-time distributions of the downward short-wave and long-wave radiation are obtained by combining in situ measurements with parameterization, the rest of forcing variables are from simulation by MM5. MM5 is forced by the underlying surface temperature, which is retrieved from NOAA satellite data, the initial data for running MM5 are obtained by assimilation from sounding data and in situ measurement on the surface. Here we compare the model-generated "data sets" with both observations at sites and regular observations at meteorological stations. The results show that a good agreement exists between the modeled results by MM5 or SiB2 and in situ measurements. Meantime, the analysis on energy closure indicates that modeled results are in near agreement to those from several independent energy balance closure studies conducted at individual GAME/Tibet boundary layer tower sites. The agreement suggests that combined sensible-latent heat flux estimates from the tower flux eddy correlation measurements are approximately 20% low.
Submittal Information
Name :
Date :
Dr. Gao Zhiqiu
29-May-01-13:54:49
Organization :
Theme :
Chinese Academy of Meteorological Sciences, CMA, China
Theme 3
Address :
Presentation :
Chinese Meteorological Administration, Zhongguancun South Street, 100081, Beijing
