Precipitation simulation of tropical cyclone Vamei over equatorial Southeast Asia

Mastura Mahmud, T. S V Vijaya Kumar

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

The precipitation features of a rare tropical cyclone that occurred in the equatorial Southeast Asia were successfully simulated by the Florida State University (FSU) Global and Nested Regional Spectral Models. The control nonlinear mode initialization runs for both models revealed the presence of a cyclonic vortex near the southern tip of Peninsular Malaysia without invoking any bogusing. Two variants of the FSU model that utilized different cumulus parameterization schemes, specifically the Arakawa-Schubert and the modified Kuo, were selected to investigate the sensitivity of precipitation simulations for this tropical cyclone. It is found that the modified Kuo cumulus parameterization scheme predicted more intense precipitation than the Arakawa-Schubert scheme. Statistical verification showed that the latter scheme presented more credible precipitation results. A more realistic area-averaged rainfall rate distribution closer to the observed rainfall compared to the control runs was produced when physical initialization of observed rain rates was invoked for both cumulus schemes. Further improvement on the placement and intensities of the predicted precipitation was achieved from the higher resolution regional model.

Original languageEnglish
Pages (from-to)42-60
Number of pages19
JournalInternational Journal of Ecology and Development
Volume13
Issue numberS09
Publication statusPublished - 2009

Fingerprint

hurricanes
Southeast Asia
tropical cyclone
South East Asia
cumulus
simulation
rain
parameterization
rainfall
Malaysia
vortex
rate

Keywords

  • Equatorial Southeast Asia
  • Global and regional spectral models
  • Precipitation prediction
  • Tropical cyclone

ASJC Scopus subject areas

  • Ecology
  • Ecology, Evolution, Behavior and Systematics
  • Development

Cite this

Precipitation simulation of tropical cyclone Vamei over equatorial Southeast Asia. / Mahmud, Mastura; Vijaya Kumar, T. S V.

In: International Journal of Ecology and Development, Vol. 13, No. S09, 2009, p. 42-60.

Research output: Contribution to journalArticle

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