Application of TCFM cloud motion wind data in the analysis study of Typhoon Morakot(0908)

TCFM cloud motion wind technique is a new technique for tracking cloud with combination of Fourier phase analysis and maximum correlation (TCFM) to improve the precision of cloud tracking. In this article, TCFM technique is employed to retrieve cloud motion vectors for severe tropical storm “Morakot” from geostationary meteorological satellite FY-2C image series with a 30min interval on August, 2009. The retrieved data are assimilated at 1h interval into the numerical model ARPS (the Advanced Regional Prediction System) by means of its data analysis system ADAS for forecasting, and the first six hours before landing process of Typhoon “Morakot” was simulated. By comparison the result with sounding data assimilated into the initial field, concluded that the simulation result of continuous assimilation of the TCFM data shows a strong advantage in the forecast of storms and precipitation in the typhoon eye wall region.