Japan Geoscience Union Meeting 2016

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International Session (Poster)

Symbol A (Atmospheric and Hydrospheric Sciences) » A-AS Atmospheric Sciences, Meteorology & Atmospheric Environment

[A-AS02] High performance computing of next generation weather, climate, and environmental sciences using K

Sun. May 22, 2016 5:15 PM - 6:30 PM Poster Hall (International Exhibition Hall HALL6)

Convener:*Masaki Satoh(Atmosphere and Ocean Research Institute, The University of Tokyo), Masahide Kimoto(Atmosphere and Ocean Research Institute, The University of Tokyo), Kazuo Saito(Forecast Research Department, Meteorological Research Institute), Hiromu Seko(Meteorological Research Institute), Takemasa Miyoshi(RIKEN Advanced Institute for Computational Science), Tetsuro Tamura(Tokyo Institute of Technology), Hiroshi Niino(Dynamic Marine Meteorology Group, Department of Physical Oceanography, Atmosphere and Ocean Research Institute,The University of Tokyo), Masayuki Takigawa(Japan Agency for Marine-Earth Science and Technology), Hirofumi Tomita(AICS, RIKEN), Chihiro Kodama(Japan Agency for Marine-Earth Science and Technology)

5:15 PM - 6:30 PM

[AAS02-P08] Impact of ocean coupling on typhoon prediction in high-resolution nonhydrostatic global model

*Wataru Sasaki1, Ryo Onishi1, Hiromitsu Fuchigami2 (1.JAMSTEC Japan Agency for Marine-Earth Science and Technology, 2.NEC Informatec Systems, Ltd.)

Keywords:typhoon, ocean coupling, nonhydrostatic global model

Accurate prediction of typhoon intensity and track is crucial to mitigate a typhoon disaster. An intercomparison of nonhydrostatic global atmospheric models has been conducted with the aim of improving typhoon prediction under the JAMSTEC Earth Simulator Strategic Project with Special Support. Three models (Double Fourier Series (DFS), Nonhydrostatic ICosahedral Atmospheric Model (NICAM), and Multi-Scale Simulator for Geo-Environment (MSSG)) were configured with a horizontal resolution of 7-km, and 52 forecast experiments during September-October 2013 were performed (see also Sawada et al. in the same session). In addition to that, we performed forecast experiments, where an ocean general circulation model is coupled in the MSSG, to investigate the impact of ocean coupling on typhoon prediction. It was found that the prediction error of typhoon intensity ranged between -10 to 10 hPa at a lead time of up to 60 hours in all models, while the typhoon intensity was under-predicted by 20 hPa in the JMA operational global model (20-km grid spacing). No marked difference was found in the predicted typhoon intensity at a lead time of up to 36 hours between MSSG simulations with and without ocean coupling; however, the predicted typhoon intensity was reduced after a lead time of 36 hours in the case where the ocean is coupled.