2015 Fiscal Year Final Research Report

Basin scale atmosphere and ocean interaction

Planned Research

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Project Area	Multi-scale air-sea interaction under the East-Asian monsoon: A "hot spot" in the climate system
Project/Area Number	22106008
Research Category	Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)
Allocation Type	Single-year Grants
Review Section	Science and Engineering
Research Institution	Hokkaido University
Principal Investigator	Minobe Shoshiro 北海道大学, 理学(系)研究科(研究院), 教授 (70219707)
Co-Investigator(Kenkyū-buntansha)	KOMORI NOBUMASA 国立研究開発法人海洋研究開発機構, アプリケーションラボ, 主任技術研究員 (80359223) INATSU MASARU 北海道大学, 大学院理学研究院, 准教授 (80422450) YOSHIDA AKIRA (KUWANO AKIRA) 国立研究開発法人海洋研究開発機構, アプリケーションラボ, 研究員 (90392969) SASAKI YOSHINORI 北海道大学, 大学院理学研究院, 講師 (50604815)
Co-Investigator(Renkei-kenkyūsha)	OFUCHI WATARU 国立研究開発法人海洋研究開発機構, アプリケーションラボ, 主任技術研究員 (30359228) ISOGUCHI OSAMU 独立行政法人宇宙航空研究開発機構, 宇宙利用ミッション本部, 招聘研究員 (20374895) KAWAMOTO KAZUAKI 長崎大学, 水産・環境科学総合研究科, 教授 (10353450) KACHI MISAKO 国立研究開発法人宇宙航空研究開発機構, 第一宇宙技術部門, 研究領域主幹 (00523292)
Research Collaborator	Schneider Niklas ハワイ大学, 国際太平洋研究センター, 教授 O'Reilly Christopher H. オックスフォード大学, 物理学専攻, 研究員 Small Richard Justin アメリカ大気研究センター, 気候および全球力学研究部, 研究者Ⅱ
Project Period (FY)	2010-04-01 – 2016-03-31
Keywords	大気海洋相互作用 / 黒潮続流 / メキシコ湾流 / 梅雨明け / 台風 / ブロッキング / 表面風速 / jet-trappedロスビー波
Outline of Final Research Achievements	By using numerical modelling and data analysis, we have discovered the mid-latitude ocean influences on a wide range of atmospheric phenomena, including termination of Baiu rain season over the northwestern North Pacific, the route and strength of tropical cyclones, Europe blocking and its impact on cold spells. We have found that the pressure adjustment mechanism works over major western boundary currents in the mid-latitudes globally. We have developed a new diagnostic method that enable us to determine mechanisms near surface (10 m altitude) winds for time-mean field, and have showed that both the pressure adjustment mechanism and the vertical mixing mechanism working but differently. Also, we have reported for the first time that observed decadal variability of the Kuroshio Extension is due to the jet-trapped Rossby wave, and that the decadal Kuroshio Extension changes impact Japanese coastal sea-level.
Free Research Field	気象学・海洋物理学