擬似温暖化実験で得られた地球温暖化時の2018年台風2号（Jebi）の強度・構造変化

Abstract

This study examined the effect of global warming on the intensity and structures of Typhoon Jebi (2018), using regional atmospheric simulations with the current climate (CTL run) and pseudo-global 2 K and 4 K warmed climate (PGW2 and PGW4 runs). Both warmed climate conditions facilitated the typhoon intensification. As for the inner-core structures, there is a significant difference between the PGW2 and PGW4 runs. The inner-core structures in the PGW2 run were roughly similar to those in the CTL run, whereas the robust axisymmetric structures were sustained under the extremely warmed conditions until just before its landfall. The further enhanced rapid mid-latitude-warming in the PGW4 run contributed to a large CAPE in the boundary layer and a very humid environment in the middle troposphere around the south of Japan, creating the favorable conditions to maintain the robust inner-core structures in mid-latitude.