Predictability of typhoons and atmospheric disturbances in the mid-latitude and their interactions with the Ocean
| A01-K3. Predictability of typhoons and atmospheric disturbances in the mid-latitude and their interactions with the Ocean | |
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| PI | Akiyoshi WADA#(Senior researcher, Meteorological Research Institute) |
[Doctral degree: #Meteorology]
Scope:
This study addresses uncertainties of atmospheric and oceanic initial conditions. This study first performs objective analysis during projected observations at areas of Kuroshio Extention and during typhoon events using LETKF methodology. In order to evaluate the uncertainties of atmospheric initial conditions, this study analyses error-covariances obtained by data assimilation. Third, numerical simulations and ensemble simulations are performed using a nonhydrostatic atmosphere-wave-ocean coupled model based on objective anasyses obtained by LETKF methodology and by the oceanic assimilation system. The purpose of this study is to clarify dynamical and physical processes associated with torrential rains and strong winds accompanied by typhoons and atmospheric disturbances.
Research Plan:
- (i) Ensembele simulations associated with oceanic initial conditions are performed for Typhoon Choi-wan (2009).
- (ii) Lagged ensemble simulations associated with atmospheric initial conditions are performed for Typhoon Choi-wan (2009).Using KEO buoy data, assimilation is performed for Typhoon Choi-wan (2009) using LETKF methodology.
- (iii) Objective analyses are made using observations at areas of Kuroshio Extention on July, 2011 and LETKF methodology. Uncertainties of atmospheric initial conditions are evaluated using obsective analysis dataset.
