Impact of Dropwindsonde Data for Typhoon Forecasts and Its Implications for the Asian THORPEX - An OSSE Study

Seon Ki Park

Ewha Womans University,Korea 

Typhoon Rusa (2002) has devastated the east coast of the Korean peninsula with heavy rainfall (24 hr accumulated rainfall of ~860 mm). The heavy rainfall was associated with topography and other synoptic conditions. A set of experiments were performed, by employing an OSSEs strategy and a mesoscale model (MM5), to investigate potential impact of dropwindsondes on improving typhoon forecasts in track, intensity and rainfall. Discussions on the usefulness of simulated dropwindsonde data will be provided in terms of data distributions and various microphysical schemes. Implications of our results on the Asian THORPEX will be also discussed.