Development of Air-Sea Bulk Transfer Coefficients and Roughness Lengths in JMA Non-hydrostatic Model and Application in Prediction of an Intense Tropical Cyclone

Abstract

Abstract). It also considers the effect of seawave drag in the roughness length. The proposed parameterization is applied to simulate an intense tropical cyclone Hagupit (0814). The impact of the new scheme on the tropical cyclone prediction is found in the increase of maximum surface wind speed and decrease of central pressure. Improvements in the forecasts of distribution of high wind areas and precipitation are obtained. This may help to improve the model predicted wind-pressure relationship for intense tropical cyclones.

The JMA Nonhydrostatic Model and Its Applications to Operation and Research

“…Wada (2009;2012) and Wada et al (2010) used an atmosphere-wave-ocean coupled version of NHM to examine the effect of the ocean on tropical-cyclone intensity and structural change. Wong et al (2010) developed a new parameterization scheme of air-sea momentum, heat, and moisture fluxes, considering the saturation properties of bulk transfer coefficients under a high winds regime, and tested its impact on tropical cyclone intensity. Kanada et al (2012) compared PBL schemes and examined their impact on the development of intense tropical cyclones.…”

Atmospheric Model Applications

“…2012) and used an atmosphere-wave-ocean coupled version of NHM to examine the effect of the ocean on tropical-cyclone intensity and structural change. Wong et al (2010) developed a new parameterization scheme of air-sea momentum, heat, and moisture fluxes, considering the saturation properties of bulk transfer coefficients under a high winds regime, and tested its impact on tropical cyclone intensity. Kanada et al (2012) compared PBL schemes and examined their impact on the development of intense tropical cyclones.…”