Large eddy simulations of frontal turbulence structure
| Project/Area Number |
24540465
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Meteorology/Physical oceanography/Hydrology
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| Research Institution | Hokkaido University |
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Principal Investigator |
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| Project Period (FY) |
2012-04-01 – 2015-03-31
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| Project Status |
Completed (Fiscal Year 2014)
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| Budget Amount *help |
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2014: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2013: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2012: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
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| Keywords | 温帯低気圧 / 前線 / ラージ・エディ・シミュレーションｎ / ラージ・エディ・シミュレーション / 乱流 / 降雨帯 / 数値モデル / LES |
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| Outline of Final Research Achievements |
The role of turblence in determining the structures of fronts and associated small-scale disturbances was examined through a series of Large-Eddy-Simulations (LES). Ｔhe structures of fronts were determined not physically, but by the choice of numerical parameters such as the model grid size in previous mesoscale model simulations. The LES simulations conducted in this study reproduced the frontal structure in a physically significant manner, by explicitly resolving small-scale turbulence associated with the front. The physical properties of the fronts and associated small-scale disturbances, and their dependencies on the representation of turbulence and the external forcings such as the frontogenetic forcing as well, were examined systematically using the LES.
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Report
(4 results)
Research Products
(3 results)
