Evaluation on Simulation Capability of Storm Track with BCC_CSM Model
Using NCEP/NCAR reanalysis data this paper assessed the simulation capability of storm track by BCC_CSM. The results show that for the simulation of climate state the BCC_CSM model can simulate the location and intensity of the storm track in different seasons. The EOF results show that, regarding the simulation of the interannual changes of spatial and temporal distribution, eigenvectors of the BCC_CSM’s first mode and second mode are similar with that corresponding to NCEP reanalysis data. The first two modes are both the same in the whole region and north south reverse, but the third mode is different. For storm track strength and latitude index of each month, the BCC_CSM model has a nice simulation result and it can simulate the Midwinter Suppression of the Pacific storm track, and ineffective analog longitude index change. Simulations for moving trends of the storm track toward the polar region in the Pacific are not significant, while in the Atlantic Region the trend of storm axis position is simulated being toward the polar region after 1970.