Western North Pacific Tropical Cyclone Formation and Structure Change in TCS08 and TCS08 Field Experiment Support
NAVAL POSTGRADUATE SCHOOL MONTEREY CA DEPT OF METEOROLOGY
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The long-term goal of this project is to develop a better understanding of storm-scale processes in the western North Pacific associated with the entire life cycle of tropical cyclones. The inability to correctly identify tropical cyclone formation over the period of 24 h - 48 h poses a threat to shore and afloat assets across the western North Pacific. Furthermore, the predictability of structure changes during intensification of tropical cyclones is very low. During the intensification stage of a tropical cyclone, structure and track characteristics can exhibit large variabilities that decrease potential predictability. Periods of reduced predictability often occur during the decaying stage of a tropical cyclone. Because decaying tropical cyclones often transitions to a fast-moving and rapidly-developing extratropical cyclone that may contain gale-, storm-, or hurricane-force winds, there is a need to improve understanding and prediction of the extratropical transition phase of a decaying tropical cyclone. The structural evolution of the transition from a tropical to extratropical circulation involves rapid changes to the wind, cloud, and precipitation patterns.