Journal of Climatology & Weather Forecasting

ISSN - 2332-2594


Relationship between the Maximum Wind Speed and the Minimum SeaLevel Pressure for Tropical Cyclones in the Western North Pacific

Jae Won Choi, Yumi Cha, Hae-Dong Kim and Riyu Lu

The wind-pressure relationships for tropical cyclones (TCs) in the western North Pacific are re-examined based on the aircraft data, China Meteorological Administration (CMA) TC best track data and daily NCEP reanalysis data during 1949-1987. Minimum Sea Level Pressure (MSLP) is estimated from aircraft reconnaissance, and maximum wind speeds are adjusted from the maximum wind speed at a flight level observed by Doppler radar. Using these datasets (1,766 cases), the effects of latitude, environmental pressure and intensification trend on the wind-pressure relationships was examined. Results show that adding these factors into equations that estimate the minimum pressure given a fix maximum wind speed with greater accuracy than current methodologies. The environmental pressure and latitude produce the greatest improvements, with small additional improvements form development rate and translation speed. This new wind-pressure relationship can be used easily both operationally and in postanalysis.