Targeted Observations of Tropical Cyclone Movement Based on the Adjoint-Derived Sensitivity Steering Vector

• DOI: 10.1175/jas3974.1
• Publication Date: 2007-08-01T14:38:26Z
• Authors: Chun-Chieh Wu; Jan-Huey Chen; Po-Hsiung Lin; Kun-Hsuan Chou
• Keywords: Typhoon; MM5

Abstract Since 2003, a field program has been conducted under the name of Dropwindsonde Observations for Typhoon Surveillance near Taiwan Region (DOTSTAR). As DOTSTAR suggests, targeted observation is one its key objectives. The prerequisite designing observing strategy to identify sensitive areas, which would exert great influence on results numerical forecast or extent error. In addition various sensitivity products already adopted in DOTSTAR, new way area tropical cyclones based fifth-generation Pennsylvania State University–National Center Atmospheric Research (NCAR) Mesoscale Model (MM5) proposed this paper. By appropriately defining response functions represent steering flow at verifying time, simple vector, adjoint-derived vector (ADSSV), designed demonstrate locations and critical direction typhoon time. Typhoons Meari Mindulle 2004 have selected show use ADSSV. general, unique areas 36 h after time are obtained. ADSSV method also used signal binary interaction between Fungwong Fengshen (2002). implemented examined project, 2005 as well surveillance mission Atlantic hurricanes by Hurricane Division. Further analysis will be vital validate