Tropical Cyclone Intensity and Position Analysis Using Passive Microwave Imager and Sounder Data
AIR FORCE INSTITUTE OF TECHNOLOGY WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT
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Satellite based Tropical Cyclone TC intensity estimates are critical for TC warning centers and global Numerical Weather Prediction NWP Models due to the lack of in-situ observations of mean sea-level pressure and TC winds. Passive microwave instruments on polar-orbiting weather satellites are useful for estimating the intensity of TCs because upwelling microwave radiation can generally penetrate clouds. The upwelling radiation is converted to brightness temperatures and used to measure the intensity of the TCs warm core, precipitation, and ice particle formation via the emitted radiation absorption and scattering signatures. Currently, operational TC prediction centers rely on intensity estimates derived from Polar-orbiting Operational Environmental Satellite POES Advanced Microwave Sounding Unit AMSUA brightness temperatures. This study compares the performance of a variety of TC intensity estimation techniques using both the imaging and sounding channels from AMSUA, the Defense Meteorological Satellite Program DMSP Special Sensor Microwave Imager and Sounder SSMIS, and the Suomi-National Polar-orbiting Partnership S-NPP Advanced Technology Microwave Sounder ATMS for a sample of 28 North Atlantic storms from the 2011 through 2013 TC seasons.