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[AAS05-P04] Coriolis Parameter Dependence of Typhoon Formation in Radiative-Convective Equilibrium
Keywords:TC
The statistical fact that typhoons do not form near the equator suggests that the contribution of planetary vorticity f (= Coriolis parameter) is essential for typhoon formation.
In order to confirm the contribution of the Coriolis parameter to typhoon formation, I performed radiative-convective equilibrium simulations with a horizontal resolution of 4 km using SCALE-RM, and examined whether or not typhoons form by giving Coriolis parameters corresponding to 5°N or less, 20°N, and 45°N.
In a 50-day experiment over an area of 100 km square, convection was observed but no vortex was observed for the Coriolis parameters corresponding to 5°N or less and 20°N.
However, vortex formation was observed on the 20th day of the experiment for the Coriolis parameter corresponding to 45°N and continued for 30 days after that.
Currently, I am conducting experiments while decreasing the value of f from 45°N to find the threshold of the Coriolis parameter size necessary for the formation of a vortex.
In order to confirm the contribution of the Coriolis parameter to typhoon formation, I performed radiative-convective equilibrium simulations with a horizontal resolution of 4 km using SCALE-RM, and examined whether or not typhoons form by giving Coriolis parameters corresponding to 5°N or less, 20°N, and 45°N.
In a 50-day experiment over an area of 100 km square, convection was observed but no vortex was observed for the Coriolis parameters corresponding to 5°N or less and 20°N.
However, vortex formation was observed on the 20th day of the experiment for the Coriolis parameter corresponding to 45°N and continued for 30 days after that.
Currently, I am conducting experiments while decreasing the value of f from 45°N to find the threshold of the Coriolis parameter size necessary for the formation of a vortex.