The T-TREC Technique for Retrieving the Winds of Landfalling Typhoons in China |
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| Authors: | Mingjun Wang Kun Zhao Dan Wu |
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| Institution: | (1) Department of Environmental Information and Engineering, Chung Cheng Institute of Technology, National Defense University, 190 Sanyuan 1st Street, Dahsi, 33509 Taoyuan, Taiwan, ROC;(2) General Education Center, Lunghwa University of Science and Technology, Taoyuan, Taiwan, ROC;(3) Department of Environmental Information and Engineering, National Defense University, Taoyuan, Taiwan, ROC |
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| Abstract: | In this study, an extension of the TREC (Tracking Radar Echo by Correlations) technique, named Tropical Cyclone (TC) circulation
TREC (T-TREC), is developed to retrieve the winds of landfalling typhoons in China. The T-TREC analysis is performed on a
polar grid centered at the TC center, using arc-shaped correlation cells and an arc-shaped search area. The search for the
best correlation match is confined along the cyclonic direction with a limited search distance in the radial direction based
on the cyclonic circulation characteristics of TCs in the Northern Hemisphere. The TC center is determined objectively using
reflectivity data while the Doppler radar radial velocities are incorporated to estimate the search range and create a velocity
correlation matrix as auxiliary constraints. |
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| Keywords: | landfalling typhoon T-TREC technique Doppler radar |
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