IMPACT OF SATELLITE OBSERVED SST ON INTENSITY AND TRACK SIMULATION OF TROPICAL CYCLONE OVER VIET NAM EAST SEA: A CASE STUDY OF TYPHOON NALGAE (2011)

Tóm tắt

Sea surface temperature (SST) is one of the most important thermal factors affecting typhoon. This paper was carried out to examine the impact of satellite observed SST on intensity and track simulation of tropical cyclone over Viet Nam East sea by using the Weather Research and Forecast (WRF) model. We have selected typhoon Nalgae (2011) for studying the SST impact. Three different sets of SSTs were used in this study: (1) SST from GFS analysis is provided for the initial condition and kept unchanged during the 72 hr simulation; (2) SST from Remote Sensing Systems (RESS) is used for the initial condition and kept unchanged during the 72 hr simulation; (3) SST from RESS is updated every 24 h for the initial and boundary conditions. The simulated results show that the using SST from satellite data for both only initial condition case and initial and boundary conditions case significantly improve the simulated intensity of typhoon due to improved simulation of latent heat and heat fluxes.