SIMULATION OF NORTH INDIAN OCEAN TROPICAL CYCLONES USING RAMS NUMERICAL WEATHER PREDICTION MODEL

摘要

Performance of non-hydrostatic Regional Atmospheric Modeling System（RAMS）in simulating the tropical cyclones of different intensities,formed during pre and post monsoon is evaluated.Study is carried out for Orissa,Sidr,Mala,h04B,01A,and Agni cyclones.The simulated cyclone track,winds at 850 hpa and 200 hpa and other thermodynamical features associated with the development of cyclones such as vertical wind shear and mid tropospheric humidity and sea surface temperature are compared with observations.The tracks of all cyclones are reasonably well simulated by the model except for h04B.The track error increases with the simulation time.The model overestimates the lowest mean sea level pressure as compared to the observations.The model represents the low level circulation and upper air divergence of wind realistic during all the cyclone cases.