Turbulence parameterization and suspended particulate matter dynamics in the ocean boundary layers
| Project/Area Number |
26740009
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Environmental dynamic analysis
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| Research Institution | Fisheries Research and Education Agency (2016)
National Institute for Environmental Studies (2014-2015) |
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Principal Investigator |
Furuichi Naoki 国立研究開発法人水産研究・教育機構, 水産工学研究所, 研究員 (70588243)
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| Project Period (FY) |
2014-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2016: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2015: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2014: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
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| Keywords | 乱流 / 海洋混合層 / 粒子状物質 / Large Eddy Simulation / パラメタリゼーション / LES / 海洋乱流 |
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| Outline of Final Research Achievements |
Using a large eddy simulation (LES) model, we carried out numerical experiments for the upper-ocean boundary layer processes under several atmospheric forcing scenarios as well as the tidal bottom boundary layer (BBL) processes; the obtained results were used to assess the widely-used Mellor-Yamada (MY) turbulence scheme. We modified its formulations following recent studies in the atmospheric boundary layer to improve the performance in reproducing the response under each forcing. We next used the LES results to examine the suspended particulate matter dynamics. The result suggested that the vertical diffusivity coefficient of particles is of the same order as the vertical eddy viscosity or diffusivity coefficients derived from the velocity or temperature fields of seawater. We finally incorporated the modified turbulence scheme in a hydrodynamic simulation model to assess its performance. The improved scheme performed better than MY in reproducing the BBL development.
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Report
(4 results)
Research Products
(21 results)
