Relationship between Near-Surface Winds Due to Tropical Cyclones and Infrared Brightness Temperature Obtained from Geostationary Satellite

Based on ten-year tropical cyclones (TCs) observations from 2009 to 2018, the black body temperature (TBB, also called cloud-top brightness temperature) data obtained infrared channel 1 (with wavelength of 10.30–11.30 µm) FY-2 satellite image, and wind observation at automatic weather stations (AWSs) in Guangdong province, this study explores relationship between TBBs winds induced by TCs AWSs. It is found that speeds AWSs cannot be directly using TBB value inversion, but maximum potential gust (MPG) average-wind (MPAW) can estimated when a known. Influenced terrain, surrounding environment, detected height, MPG MPAW values different may differ for same TBB. The ERA5 reanalysis used explore over grids area during TCs’ periods. Similar AWSs, there capping function TBBs. generally show average conditions inside grids, therefore, supplement areas where no AWS available. Such could provide references estimating disasters area.