Impact of ocean coupling on typhoon prediction in high-resolution nonhydrostatic global model

Wataru Sasaki, Ryo Onishi, Keiko Takahashi, Hirotmitsu Fuchigami

研究成果: Conference contribution

1 被引用数 (Scopus)

抄録

Accurate prediction of intensity and track of typhoon is crucial to mitigate typhoon disasters. To improve typhoon forecast, the 'Global 7-km mesh nonhydrostatic model inter-comparison project for improving typhoon forecast (TYMIP-G7)' has been conducted under the JAMSTEC Earth Simulator Strategic Project with Special Support. In the project, ensemble of the 5-day typhoon forecast experiments in September and October 2013 were conducted by using three nonhydrostatic global atmospheric models. Preliminary results indicate that the nonhydrostatic models significantly improve the forecast skill in terms of typhoon intensity. However, the atmospheric models used in TYMIP-G7 are not fully coupled with ocean. This study aims to investigate the impact of ocean coupling on typhoon simulation by using a nonhydrostatic global ocean-atmosphere coupled general circulation model. It was found that the forecast error of typhoon intensity ranged from - 10 hPa to 10 hPa at the forecast time of 60 hours in the coupled model. We also found that there is no marked difference in the modeled typhoon intensity at the forecast lead time of 36 hours between the coupled model and standalone atmospheric model; however, the typhoon intensity was weakened after the forecast lead time of 36 hours in the coupled model compared to the standalone model. On the other hand, the forecast error of typhoon track was not changed by ocean coupling, indicating that large scale atmospheric circulations were not changed by ocean coupling in the 5-day simulation.

本文言語English
ホスト出版物のタイトルTechno-Ocean 2016
ホスト出版物のサブタイトルReturn to the Oceans
出版社Institute of Electrical and Electronics Engineers Inc.
ページ381-384
ページ数4
ISBN(電子版)9781509024452
DOI
出版ステータスPublished - 2017 3 30
外部発表はい
イベント16th Techno-Ocean, Techno-Ocean 2016 - Kobe, Japan
継続期間: 2016 10 62016 10 8

出版物シリーズ

名前Techno-Ocean 2016: Return to the Oceans

Other

Other16th Techno-Ocean, Techno-Ocean 2016
国/地域Japan
CityKobe
Period16/10/616/10/8

ASJC Scopus subject areas

  • 海洋学
  • 水の科学と技術
  • エネルギー工学および電力技術
  • 海洋工学
  • 器械工学

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