2013 Fiscal Year Final Research Report
Direct and indirect effects of atmospheric gravity waves on the climate system
| Project/Area Number |
22340134
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Meteorology/Physical oceanography/Hydrology
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| Research Institution | The University of Tokyo |
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Principal Investigator |
SATO Kaoru 東京大学, 理学(系)研究科(研究院), 教授 (90251496)
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| Co-Investigator(Renkei-kenkyūsha) |
AKIYOSHI Hideharu 独立行政法人国立環境研究所, 大気圏環境 研究領域, 主任研究員 (80211697)
WATANABE Shingo 独立行政法人海洋研究開発機構, 地球環境 変動研究領域, 研究員 (50371745)
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| Project Period (FY) |
2010-04-01 – 2013-03-31
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| Keywords | 中層大気 / 大気重力波 / 大気大循環 / 極成層圏雲 / オゾンホール / ロスビー波 / コリオリ力 |
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| Research Abstract |
The effects of gravity waves (GW) in the earth climate are categorized into two: direct effects through their ability to deposit momentum to drive the general circulation, and indirect effects on the ozone chemistry through their temperature fluctuations to modulate polar stratospheric cloud amounts. Using data from a high-resolution general circulation model and a chemistry climate model, it was shown that GW forcing is distributed much wider than the source region by significant refraction and advection by the mean flow, that GW forcing is critical to the dissipation phase of the sudden stratospheric warming, and that the main forcing to drive the stratospheric circulation in the summer hemisphere is attributable to GW. By analyzing satellite data, GW indirect effect on the ozone chemistry is quantified. Moreover, we succeeded in formulation of a unified theory of the 3-d circulation driven by Rossby waves and GW that is inevitable for future studies using high-resolution data.
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Research Products
(26 results)
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[Journal Article] Recent developments in gravity wave effects in climate models, and the global distribution of gravity wave momentum flux from observations and models2010
Author(s)
Alexander. M. J., M. Geller, C. McLandress, S. Polavarapu, P. Preusse, F. Sassi, K. Sato, S. Eckermann, M. Ern, A. Hertzog, Y. Kawatani, M. Pulido, T. Shaw, M. Sigmond, R. Vincent, S. Watanabe
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Journal Title
Q. J. Roy. Meteorol. Soc.
Volume: 136
Pages: 1103-1124
DOI
Peer Reviewed
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