Development of a novel turbulence scheme in the atmospheric boundary layer for high resolution mesoscale models

• Project/Area Number: 26800246
• 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
• Principal Investigator: Kitamura Yuji 気象庁気象研究所, 環境・応用気象研究部, 主任研究官 (40455275)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Project Status: Completed (Fiscal Year 2016)
• Budget Amount: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000); Fiscal Year 2016: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2015: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2014: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
• Keywords: 大気境界層 / 乱流モデリング / 解像度依存性

Outline of Final Research Achievements

It has been known that existing turbulence parameterization schemes are not applicable to high resolution mesoscale models in the atmospheric boundary layer. The dependence of turbulence length scales on the spatial resolution is estimated from an a priori analysis using high resolution Large-Eddy Simulations to solve this problem. The turbulence length scales are empirically determined as a function of the model resolution on the basis of the result obtained from this analysis, and are applied by extending the existing scheme. It is confirmed that the proposed new turbulence scheme can appropriately represent the turbulent transport even at the spatial resolution where existing schemes cannot be applied.

Research Products

• [Journal Article] Improving a Turbulence Scheme for the Terra Incognita in a Dry Convective Boundary Layer (2016)
  • Author(s): Yuji Kitamura
  • Journal Title: Journal of the Meteorological Society of Japan. Ser. II Volume: 94 Issue: 6 Pages: 491-506
  • DOI: 10.2151/jmsj.2016-028
  • NAID: 130005286353
  • ISSN: 0026-1165, 2186-9057
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Revisiting the bulk relation for heat flux in the free convection limit (2016)
  • Author(s): Kitamura, Y. and Ito, J.
  • Journal Title: Boundary-Layer Meteor. Volume: 158 Issue: 1 Pages: 93-103
  • DOI: 10.1007/s10546-015-0075-z
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Estimating dependence of the turbulent length scales on model resolution based on a priori analysis (2015)
  • Author(s): Yuji Kitamura
  • Journal Title: J. Atmos. Sci. Volume: 72 Issue: 2 Pages: 750-762
  • DOI: 10.1175/jas-d-14-0189.1
  • Peer Reviewed
• [Presentation] Estimating the energy dissipation rate derived from discretization of the advection term (2016)
  • Author(s): Kitamura, Y. and Nishizawa, S.
  • Organizer: 2016 AGU Fall Meeting
  • Place of Presentation: San Francisco, USA
  • Year and Date: 2016-12-12
  • Int'l Joint Research
• [Presentation] 移流項の差分化によって生じるエネルギー散逸率の推定 (2016)
  • Author(s): 北村 祐二，西澤 誠也
  • Organizer: 日本流体力学会年会2016
  • Place of Presentation: 名古屋工業大学
  • Year and Date: 2016-09-26
• [Presentation] A LES Based Parameterization Scheme for the Terra Incognita in a Planetary Boundary Layer (2016)
  • Author(s): Kitamura, Y.
  • Organizer: 22nd Symposium on Boundary Layers and Turbulence
  • Place of Presentation: Salt Lake City, USA
  • Year and Date: 2016-06-20
  • Int'l Joint Research
• [Presentation] 移流項の差分化によって生じるエネルギー散逸率の推定 (2016)
  • Author(s): 北村 祐二，西澤 誠也
  • Organizer: 日本気象学会2016年春季大会
  • Place of Presentation: 国立オリンピック記念青少年総合センター
  • Year and Date: 2016-05-18
• [Presentation] 移流項の差分化によって生じるエネルギー散逸率の推定 (2016)
  • Author(s): 北村祐二，西澤誠也
  • Organizer: 日本気象学会春季大会
  • Place of Presentation: 国立オリンピック記念青少年総合センター
  • Year and Date: 2016-05-18
• [Presentation] Developing a parameterization scheme for the gray zone of the atmospheric boundary layer (2015)
  • Author(s): Kitamura, Y.
  • Organizer: AGU Fall Meeting
  • Place of Presentation: San Francisco, USA
  • Year and Date: 2015-12-14
  • Int'l Joint Research
• [Presentation] Developing a parameterization scheme for the gray zone in the atmospheric boundary layer (2015)
  • Author(s): Kitamura, Y.
  • Organizer: International WS Issues in downscaling of climate change projection
  • Place of Presentation: つくば国際会議場
  • Year and Date: 2015-10-05
  • Int'l Joint Research
• [Presentation] 乱流長さの解像度依存性の推定と大気境界層への適用 (2015)
  • Author(s): 北村祐二
  • Organizer: 日本流体力学会年会
  • Place of Presentation: 東京工業大学
  • Year and Date: 2015-09-26
• [Presentation] 数値モデルで診断される地表面熱フラックスの水平解像度依存性 (2014)
  • Author(s): 北村 祐二，伊藤 純至
  • Organizer: 日本気象学会2014年秋季大会
  • Place of Presentation: 福岡国際会議場(福岡市)
  • Year and Date: 2014-10-21 – 2014-10-23
• [Presentation] Estimation of the turbulent length scale across terra incognita with its application to a convective boundary layer (2014)
  • Author(s): Yuji Kitamura
  • Organizer: 3rd International Workshop on Nonhydrostatic Numerical Models
  • Place of Presentation: 理化学研究所(神戸市)
  • Year and Date: 2014-09-24 – 2014-09-26
• [Presentation] 混合距離の非等方性を考慮した境界層乱流モデルの構築 (2014)
  • Author(s): 北村 祐二
  • Organizer: 日本気象学会2014年春季大会
  • Place of Presentation: 横浜市開港記念会館(横浜市)
  • Year and Date: 2014-05-21 – 2014-05-24