Objective tropical cyclone center tracking using Single-Doppler Radar

AMS Citation:
Bell, M. M., and W. -chau Lee, 2012: Objective tropical cyclone center tracking using Single-Doppler Radar. Journal of Applied Meteorology and Climatology, 51, 878-896, doi:10.1175/JAMC-D-11-0167.1.
Date:2012-05-01
Resource Type:article
Title:Objective tropical cyclone center tracking using Single-Doppler Radar
Abstract: This study presents an extension of the ground-based velocity track display (GBVTD)-simplex tropical cyclone (TC) circulation center--finding algorithm to further improve the accuracy and consistency of TC center estimates from single-Doppler radar data. The improved center-finding method determines a TC track that ensures spatial and temporal continuities of four primary characteristics: the radius of maximum wind, the maximum axisymmetric tangential wind, and the latitude and longitude of the TC circulation center. A statistical analysis improves the consistency of the TC centers over time and makes it possible to automate the GBVTD-simplex algorithm for tracking of landfalling TCs. The characteristics and performance of this objective statistical center-finding method are evaluated using datasets from Hurricane Danny (1997) and Bret (1999) over 5-h periods during which both storms were simultaneously observed by two coastal Weather Surveillance Radar-1988 Doppler (WSR-88D) units. Independent single-Doppler and dual-Doppler centers are determined and used to assess the absolute accuracy of the algorithm. Reductions of 50% and 10% in the average distance between independent center estimates are found for Danny and Bret, respectively, over the original GBVTD-simplex method. The average center uncertainties are estimated to be less than 2 km, yielding estimated errors of less than 5% in the retrieved radius of maximum wind and wavenumber-0 axisymmetric tangential wind, and ~30% error in the wavenumber-1 asymmetric tangential wind. The objective statistical center-finding method can be run on a time scale comparable to that of a WSR-88D volume scan, thus making it a viable tool for both research and operational use.
Subject(s):Tropical cyclones, Radars/Radar observations, Algorithms
Peer Review:Refereed
Copyright Information:Copyright 2012 American Meteorological Society (AMS). Permission to use figures, tables, and brief excerpts from this work in scientific and educational works is hereby granted provided that the source is acknowledged. Any use of material in this work that is determined to be "fair use" under Section 107 or that satisfies the conditions specified in Section 108 of the U.S. Copyright Law (17 USC, as revised by P.L. 94-553) does not require the Society's permission. Republication, systematic reproduction, posting in electronic form on servers, or other uses of this material, except as exempted by the above statements, requires written permission or license from the AMS. Additional details are provided in the AMS Copyright Policies, available from the AMS at 617-227-2425 or amspubs@ametsoc.org. Permission to place a copy of this work on this server has been provided by the AMS. The AMS does not guarantee that the copy provided here is an accurate copy of the published work.
OpenSky citable URL: ark:/85065/d7q81drm
Publisher's Version: 10.1175/JAMC-D-11-0167.1
Author(s):
  • Michael Bell
  • Wen-chau Lee - NCAR/UCAR
  • Random Profile

    SCIENTIST I

    Recent & Upcoming Visitors