Development of a chemical Data assimilation system using ensemble Kalman filter

2009 Fiscal Year Final Research Report

• Project/Area Number: 19740300
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Meteorology/Physical oceanography/Hydrology
• Research Institution: Japan Agency for Marine-Earth Science and Technology
• Principal Investigator: MIYAZAKI Kazuyuki Japan Agency for Marine-Earth Science and Technology, 地球環境変動領域, ポストドクトラル研究員 (30435838)
• Project Period (FY): 2007 – 2009
• Keywords: オゾン / データ同化 / 二酸化炭素 / 化学輸送モデル / 大気微量成分

Research Abstract

本研究は高度な同化手法であるアンサンブルカルマンフィルタ(EnKF)を用いて大気微量成分の高精度なデータ同化システムを構築することを目的とする。この目的のために、大気の観測値を大気大循環モデルに同化するシステムおよび大気微量成分の観測値を化学輸送モデルに同化するシステムを構築した。理想化実験および実際の観測データを利用したデータ同化実験から本システムの性能を検証し、大気微量成分の再解析を実施するための実用的なフレームワークが得られた。

Research Products

• [Journal Article] Isentropic diffusion coefficient derived from chemical constituent data (2009)
  • Author(s): Miyazaki, K., T. Iwasaki
  • Journal Title: Scientific Online Letters on the Atmosphere Vol.5 Pages: 009-012
  • URL: doi:10.2151/sola
  • Peer Reviewed
• [Journal Article] Performance of a local ensemble transform Kalman filter for the analysis of atmospheric circulation and distribution of long-lived tracers under idealized conditions (2009)
  • Author(s): Miyazaki, K.
  • Journal Title: Journal of Geophysical Research 114 Pages: D19304
  • URL: doi:10.1029/2008JD010545
  • Peer Reviewed
• [Journal Article] The gradient genesis of stratospheric trace species in the subtropics and around the polar vortex (2008)
  • Author(s): Miyazaki, K., T. Iwasaki
  • Journal Title: Journal of the Atmospheric Sciences 65 Pages: 490-508
  • Peer Reviewed
• [Journal Article] On the analysis of mean vertical velocities around the Antarctic polar vortex (2008)
  • Author(s): Miyazaki, K., T. Iwasaki
  • Journal Title: Journal of the Atmospheric Sciences 65 Pages: 3989-4003
  • Peer Reviewed
• [Journal Article] Global-scale transport of carbon dioxide in the troposphere (2007)
  • Author(s): Miyazaki, K., P.K. Patra, M. Takigawa, T. Iwasaki, T. Nakazawa
  • Journal Title: Journal of Geophysical Research 113 Pages: D15301
  • Peer Reviewed
• [Journal Article] Transport and mixing in the extratropical tropopause region in a high vertical resolution GCM. Part I: Potential vorticity and heat budget analysis
  • Author(s): Miyazaki, K., S. Watanabe, Y. Kawatani, Y. Tomikawa, M. Takahashi, K. Sato
  • Journal Title: Journal of the Atmospheric Sciences (in press)
  • Peer Reviewed
• [Journal Article] Transport and mixing in the extratropical tropopause region in a high vertical resolution GCM. Part II: Relative importance of large-scale and small-scale dynamics
  • Author(s): Miyazaki, K., K. Sato, S. Watanabe, Y. Tomikawa, Y. Kawatani, M. Takahashi
  • Journal Title: Journal of the Atmospheric Sciences (in press)
  • Peer Reviewed
• [Journal Article] Formation mechanisms of latitudinal CO2 gradient in the upper troposphere over the subtropics and tropics
  • Author(s): Miyazaki, K., T. Machida, P.K. Patra, T. Iwasaki, Y. Sawa, H. Matsueda, T. Nakazawa
  • Journal Title: Journal of Geophysical Research 114 Pages: D03306
  • URL: doi:10.1029/2007JD009557
  • Peer Reviewed
• [Presentation] Transport and mixing in the extratropical tropopause region in a high vertical resolution GCM (2009)
  • Author(s): Miyazaki, K., S. Watanabe, Y. Kawatani, Y. Tomikawa, M. Takahashi, K. Sat
  • Organizer: IGAC-SPARC Joint Workshop
  • Place of Presentation: Kyoto, Japan
  • Year and Date: 2009-10-25
• [Presentation] Transport and mixing in the extratropical tropopause region in a high vertical resolution GCM (2009)
  • Author(s): Miyazaki, K., S. Watanabe, Y. Kawatani, Y. Tomikawa, M. Takahashi, K. Sat
  • Organizer: The Extra-tropical UTLS: observations, concepts and future directions
  • Place of Presentation: Boulder, USA
  • Year and Date: 2009-10-21
• [Presentation] Performance of a local ensemble transform Kalman filter data assimilation system for the analysis of the atmospheric circulation and the distribution of long-lived tracers (2009)
  • Author(s): Miyazaki, K.
  • Organizer: The 5TH WMO Symposium on Data Assimilation
  • Place of Presentation: Melbourne, Australia
  • Year and Date: 2009-10-08
• [Presentation] Comparisons of Brewer Dobson Circulations Diagnosed from Reanalyses (2009)
  • Author(s): Iwasaki, T., H. Hamada, K. Miyazaki
  • Organizer: The 5TH WMO Symposium on Data Assimilation
  • Place of Presentation: Melbourne, Australia
  • Year and Date: 2009-10-05
• [Presentation] Performance of local ensemble transform Kalman filter data assimilation system on analysis of long-lived tracer distributions in the troposphere and stratosphere (2009)
  • Author(s): Miyazaki, K.
  • Organizer: MOCA-09: IAMAS - IAPSO - IACS 2009 Joint Assembly
  • Place of Presentation: Montreal, Canada
  • Year and Date: 2009-07-22
• [Presentation] Development of a chemical data assimilation system using a local ensemble transformed Kalman filter: A perfect model experiment (2008)
  • Author(s): Miyazaki, K., K. Sudo
  • Organizer: WWRP/THORPEX WORKSHOP on 4D-VAR and ENSEMBLE KALMAN FILTER INTER-COMPARISONS
  • Place of Presentation: Buenos Aires, Argentina
  • Year and Date: 2008-11-11
• [Presentation] Analysis of extratropical UTLS structure using a high vertical resolution GCM (2008)
  • Author(s): Miyazaki, K., S. Watanabe, Y. Tomikawa, Y. Kawatani, M. Takahashi, K. Sato
  • Organizer: SPARC 4th General Assembly
  • Place of Presentation: Bologna, Italy
  • Year and Date: 2008-09-02
• [Presentation] Analysis of mean downward velocity around the Antarctic polar vortex (2008)
  • Author(s): Miyazaki, K., T. Iwasaki
  • Organizer: SPARC 4th General Assembly
  • Place of Presentation: Bologna, Italy
  • Year and Date: 2008-09-02
• [Presentation] Development of a chemistry-climate coupling data assimilation system using a local ensemble transformed Kalman filter (2008)
  • Author(s): Miyazaki, K., K. Sudo
  • Organizer: Quadrennial Ozone Symposium 2008
  • Place of Presentation: Tromso, Norway
  • Year and Date: 2008-07-02
• [Presentation] Global transport and life cycle of ozone in the stratosphere (2008)
  • Author(s): Miyazaki, K., T. Iwasaki
  • Organizer: SMILES International Workshop 2008
  • Place of Presentation: Kyoto, Japan
  • Year and Date: 2008-03-19
• [Presentation] Comparisons of Brewer-Dobson Circulations (2008)
  • Author(s): Iwasaki, T., H, Hamada, K. Miyazaki
  • Organizer: Third WCRP International Conference on Reanalysis
  • Place of Presentation: Tokyo, Japan
  • Year and Date: 2008-01-31
• [Presentation] Development of a chemical data assimilation system using a local ensemble transformed Kalman filter (2008)
  • Author(s): Miyazaki, K., K. Sudo
  • Organizer: Third WCRP International Conference on Reanalysis
  • Place of Presentation: Tokyo, Japan
  • Year and Date: 2008-01-31
• [Presentation] The gradient genesis of the stratospheric trace species in the subtropics and around the polar vortex (2007)
  • Author(s): Miyazaki, K., T. Iwasaki
  • Organizer: AMS 14th Conference on Middle Atmosphere
  • Place of Presentation: Portland, Oregon, USA
  • Year and Date: 2007-08-21
• [Presentation] Transport analysis of tropospheric carbon dioxide (2007)
  • Author(s): Miyazaki, K., Patra, K. Prabir, M, Takigawa, T, Nakazawa
  • Organizer: European Geosciences Union General Assembly 2007
  • Place of Presentation: Vienna, Austria
  • Year and Date: 2007-04-19
• [Presentation] The gradient genesis of the stratospheric trace species in the subtropics and around the polar vortex (2007)
  • Author(s): Miyazaki, K., T. Iwasaki
  • Organizer: European Geosciences Union General Assembly 2007
  • Place of Presentation: Vienna, Austria
  • Year and Date: 2007-04-19
• [Remarks]
  • URL: http://www.jamstec.go.jp/res/ress/kmiyazaki/