Modelling tropical cyclone over-water wind and pressure fields

McConochie, Jason D., Hardy, Thomas A., and Mason, Luciano B. (2004) Modelling tropical cyclone over-water wind and pressure fields. Ocean engineering, 31 (14-15). pp. 1757-1782.

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Abstract

A parametric wind field model and an interactive computer tool are used to develop time histories of 2D wind field (surface wind speed and direction) during the 64 historical tropical cyclones that threatened the east coast of Queensland, Australia, during the 33 years (1969–2002) after the advent of meteorological satellite data for the region. These wind fields are suitable to be applied to applications such as wave, storm surge and circulation modelling. The parametric wind field model includes a double vortex and a representation of the synoptic winds in which the tropical cyclone is embedded. The process used all easily accessible meteorological data, including wind speeds, directions and pressures to determine the best-fit wind fields. Detailed comparisons between model and measurements for three individual storms are shown. These highlight the difficulties associated with fitting the parametric model to the very sparse measurements. If the storm did not pass close to a measurement station, then estimates of parameter values for radius of the storm and spatial shape of the wind field make the calibration process difficult and subjective. Nevertheless, results from the whole ensemble show that the modelled wind fields are unbiased with very good error statistics. These calibrations provide information for the distributions of values for radius of maximum winds and Holland B, parameters for which data are nonexistent in the Coral Sea region. An example of the use of the calibrated wind fields for the forcing of storm surge and wave models shows a very accurate comparison between modelled and measured surge and waves.

Item ID: 6976
Item Type: Article (Refereed Research - C1)
Keywords: field; model; tropical cyclone; wind
ISSN: 1873-5258
Date Deposited: 30 Mar 2010 22:41
FoR Codes: 09 ENGINEERING > 0905 Civil Engineering > 090599 Civil Engineering not elsewhere classified @ 100%
SEO Codes: 96 ENVIRONMENT > 9602 Atmosphere and Weather > 960202 Atmospheric Processes and Dynamics @ 100%
Citation Count from Web of Science Web of Science 10
Downloads: Total: 2
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