SIMULATION OF TROPICAL CYCLONE 201610 (LIONROCK) AND ITS REMOTE EFFECT ON HEAVY RAINFALL IN HOKKAIDO

• DOI: 10.2208/jscejhe.73.i_199
• Publication Date: 2018-02-27T17:23:51Z
• Authors: Dzung NGUYEN-LE; Tomohito J. YAMADA
• Keywords: Typhoon

When tropical cyclone (TC) 201610, namely Lionrock, was moving over the western North Pacific from southeast of Honshu to cut across Tohoku region during 29-30 August 2016, continuous and intense rainfall occurred in mid- southeastern Hokkaido, far TC center. The Weather Research Forecast (WRF) model is used investigate possible remote effect Lionrock on this heavy rain Hokkaido. National Center for Environmental Prediction (NCEP) global final (FNL) analysis provide both initial lateral boundary conditions model. Three numerical experiments are performed. In control experiment (CTL), original FNL used. no-TC (NoTC), vortex associated with removed such that signal does not appear at time. no-topography (noTopo), terrain height Hokkaido set 1 m if it higher than m. As verified against observations, CTL noTopo capture reasonably well track. also reproduces relatively spatial distribution temporal evolution rainfall, whereas largely suppressed noTC experiment, suggesting a significant far-reaching Lionrock. combined stationary low-pressure system located Sea Japan enhances moisture transport towards through their outer circulation. Particularly, only very small amount observed indicating orographic forcing mountains plays most critical role extreme event.