Effects of Diurnally Varying Radiation on Tropical Cyclone in Idealized Simulation

Abstract

This work examines this mechanism by conducting idealized rotating radiative-convective equilibrium simulation, in which the effects of the large-scale influences are ignored, and the convection reacts to destabilization only by the radiation and surface enthalpy fluxes. The tropical cyclone develops spontaneously from uniform environment with random temperature perturbation in low-level to initiate convection. The experiment with normal diurnally varying radiation and the experiment with constant shortwave radiation were carried out with 100 simulation days. Several sensitivity experiments are also designed with different sea surface temperature, different microphysical schemes. The results show that the tropical cyclones in the experiments with diurnally varying radiation indicate obvious diurnal cycles of convection activity.