Surface Layer Parameretization for Large Eddy Simulation

• Project/Area Number: 26800244
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Meteorology/Physical oceanography/Hydrology
• Research Institution: Japan, Meteorological Research Institute (2015-2016); The University of Tokyo (2014)
• Principal Investigator: Ito Junshi 気象庁気象研究所, 予報研究部, 研究官 (00726193)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Project Status: Completed (Fiscal Year 2016)
• Budget Amount: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000); Fiscal Year 2016: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2015: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2014: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
• Keywords: 接地境界層 / ラージ・エディ・シミュレーション / LES / DNS / 大気境界層 / 風洞実験 / 運動量フラックス / バルク法 / 高解像度モデル / 乱流 / 渦 / 乱流フラックス

Outline of Final Research Achievements

When turbulent eddies are partially resolved in a numerical weather prediction model (i.e. large eddy simulation), the conventional parametrization of the surface layers are inadequate. How a surface layer parametrization should be in such a model is investigated by sensitivity experiments with a large eddy simulation, direct numerical simulation of turbulence, and wind tunnel experiments. We have also studies surface layer processes specific to the strong stable and unstable conditions.

Research Products

• [Journal Article] Wind-Speed-Surface-Heat-Flux Feedback in Dust Devils (2016)
  • Author(s): Junshi Ito and Hiroshi Niino
  • Journal Title: Boundary-Layer Meteorology Volume: 161 Issue: 2 Pages: 229-235
  • DOI: 10.1007/s10546-016-0167-4
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Particle Image Velocimetry of a Dust Devil Observed in a Desert (2014)
  • Author(s): Ito, J. and H. Niino
  • Journal Title: SOLA Volume: 10 Issue: 0 Pages: 108-111
  • DOI: 10.2151/sola.2014-022
  • NAID: 130004940847
  • ISSN: 1349-6476
  • Peer Reviewed / Open Access
• [Presentation] Large Eddy Simulation on Entire Tropical Cyclone (2016)
  • Author(s): Junshi Ito, Tsutao Oizumi, and Hiroshi Niino
  • Organizer: 32nd Conference on Hurricane an Tropical Meteorology
  • Place of Presentation: プエルトリコ
  • Year and Date: 2016-04-20
  • Int'l Joint Research
• [Presentation] Entire Tropical Cyclone LES (2016)
  • Author(s): Junshi Ito
  • Organizer: 台風セミナー2015
  • Place of Presentation: 気象庁
  • Year and Date: 2016-01-06
  • Int'l Joint Research
• [Presentation] LESのための接地境界条件の検討 (2016)
  • Author(s): 伊藤純至、新野宏、毛利英明
  • Organizer: 日本流体力学会年会
  • Place of Presentation: 名古屋工業大学
• [Presentation] On a surface flux model for atmospheric large eddy simulations (2016)
  • Author(s): Junshi Ito, Hiroshi Niino, and Hideaki Mouri
  • Organizer: 22nd Symposium on Boundary Layers and Turbulence
  • Place of Presentation: Salt Lake City, United States
  • Int'l Joint Research
• [Presentation] ラージ・エディ・シミュレーションでみる境界層の様々な微細構造 (2016)
  • Author(s): 伊藤純至
  • Organizer: 東京大学大気海洋研究所国際沿岸海洋研究センター研究集会「海洋循環に果たすスケール間相互作用の理解」
  • Place of Presentation: 大鎚
• [Presentation] 気象庁非静力学モデルによる肱川あらしの再現 (2016)
  • Author(s): 伊藤純至、黒坂優、名越利幸
  • Organizer: 地球惑星科学連合大会
  • Place of Presentation: 幕張
• [Presentation] JMANHMによる肱川あらしの再現 (2016)
  • Author(s): 伊藤純至、黒坂優、名越利幸
  • Organizer: 日本気象学会秋季大会
  • Place of Presentation: 名古屋大学
• [Presentation] 台風全域LESによる台風境界層の考察 (2016)
  • Author(s): 伊藤純至、大泉伝、新野宏
  • Organizer: 京都大学防災研究所共同研究集会「台風研究会」
  • Place of Presentation: 京都大学防災研究所
• [Presentation] 台風全域ラージ・エディ・シミュレーション (2015)
  • Author(s): 伊藤純至, 大泉伝, 新野宏
  • Organizer: 台風研究会
  • Place of Presentation: 京都大学防災研究所
  • Year and Date: 2015-10-31
• [Presentation] 砂漠に生じたダストデビル（塵旋風）のPIV (2014)
  • Author(s): 伊藤純至
  • Organizer: 日本気象学会秋季大会
  • Place of Presentation: 福岡国際会議場、福岡
  • Year and Date: 2014-10-23