Tropical Cyclone Genesis and Sudden Changes of Track and Intensity in the Western Pacific
Award Number: N00014-06-1-0303 http://www.soest.hawaii.edu/~bwang LONG-TERM GOALS The long-term goal of this project is to advance our understanding of the physical mechanisms involved in sudden changes in the tropical cyclone (TC) intensity/track and TC genesis and development processes in the western Pacific. OBJECTIVES To investigate both the large-scale environmental conditions and TC internal processes as well as their interactions that are responsible for TC genesis, rapid intensification
... pid intensification (RI) and storm-scale structural changes. Specific thrust areas include (1) mechanisms for some specific TC genesis processes, (2) the inner core structure changes and associated precursors before RI, (3) the processes controlling formation of concentric eyewalls and annular structure, and (4) the linkage between the large-scale environment sudden track change, and rapid intensity changes. APPROACH Our approach is to integrate observational analysis, numerical modeling, and diagnostic analysis to identify factors and elucidate the physical mechanisms that are responsible for TC genesis, RI, inner core structure and track changes. We analyze satellite observations and perform idealized and realistic numerical experiments with COAMPS, WRF and TCM4 models. We also apply diagnostic tools to study energetics, potential vorticity, angular momentum and heat and moisture budgets in order to elucidate mechanisms governing the internal cause structural and intensity changes. People involved in this project are the PI, Co-PIs, PostDocs: . The current statuses of the works are indicated. For details of these works, please refer to the abstracts in the next section. 1 Report Documentation Page Form Approved OMB No. 0704-0188 Public reporting burden for the collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden, to Washington Headquarters Services, Directorate for Information Operations and Reports, 1215 Jefferson Davis Highway, Suite 1204, Arlington VA 22202-4302. Respondents should be aware that notwithstanding any other provision of law, no person shall be subject to a penalty for failing to comply with a collection of information if it does not display a currently valid OMB control number.