Observed tropical cyclone wind flow characteristics

John L. Schroeder, Becca P. Edwards, Ian M. Giammanco

Research output: Contribution to journalArticle

26 Scopus citations

Abstract

Since 1998, several institutions have deployed mobile instrumented towers to collect research-grade meteorological data from landfalling tropical cyclones. This study examines the wind flow characteristics from seven landfalling tropical cyclones using data collected from eight individual mobile tower deployments which occurred from 1998-2005. Gust factor, turbulence intensity, and integral scale statistics are inspected relative to changing surface roughness, mean wind speed and storm-relative position. Radar data, acquired from the National Weather Service (NWS) Weather Surveillance Radar - 1988 Doppler (WSR-88D) network, are examined to explore potential relationships with respect to radar reflectivity and precipitation structure (convective versus stratiform). The results indicate tropical cyclone wind flow characteristics are strongly influenced by the surrounding surface roughness (i.e., exposure) at each observation site, but some secondary storm dependencies are also documented.

Original languageEnglish
Pages (from-to)349-381
Number of pages33
JournalWind and Structures, An International Journal
Volume12
Issue number4
DOIs
StatePublished - Jul 2009

Keywords

  • Gust factors
  • Integral scales
  • Radar
  • Roughness lengths.
  • Tower measurements
  • Tropical cyclones
  • Turbulence intensity
  • Wind

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