Origin of Water Vapor for the Atmospheric River in the Heavy Rain Event of July 2018

摘要

Heavy rainfall occurred in western Japan from June 28 toJuly, 2018, and this event was officially named the “HeavyRain Event of July 2018”. The heavy rainfall was supported bya persistent channels of strong water vapor transport from theEast China Sea (ECS) to the Japanese Island. The water vaporfrom spot is considered as an atmospheric river (AR). The ARsupported the development of mesoscale convective systems(MCSs) over land. These MCSs organized line-shaped, thatinteracted with the terrain and local winds, resulting in heavyrainfall and flooding events.