Developments of methods for estimating particle shape of black carbon aerosols from polarization and directionality of thermal emission

• Project/Area Number: 22740311
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Meteorology/Physical oceanography/Hydrology
• Research Institution: The University of Tokyo
• Principal Investigator: MOTEKI Nobuhiro 東京大学, 大学院・理学系研究科, 特任助教 (20507818)
• Project Period (FY): 2010 – 2011
• Project Status: Completed (Fiscal Year 2011)
• Budget Amount: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000); Fiscal Year 2011: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000); Fiscal Year 2010: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
• Keywords: 気候.エアロゾル / エアロゾル / 計測工学 / 地球環境 / 気候変動

Research Abstract

The generalized Kirchhoff's law(Rytov theory) predicts that the polarization state of thermal emission from an individual small particle depends on the particle shape. We show for the first time experimental evidence confirming this prediction for particles smaller than the wavelength. We propose that the measurement of the polarization state of thermal emission may be applicable to real-time analysis of the shape of black carbon particles in air.

Research Products

• [Journal Article] Multianglepolarimetry of thermal emission and light scattering by individual particles inairflow (2011)
  • Author(s): N. Moteki, N. Takegawa, K. Koizumi, T. Nakamura, and Y. Kondo
  • Journal Title: Aerosol Science and Technology Volume: 45 : 10 Pages: 1184-1198
• [Journal Article] Multiangle polrimetry of thermal emission and light scattering by indivisual particles in airflow (2011)
  • Author(s): Moteki, N., N. Takegawa, K. Koizumi, T. Nakamura, Y. Kondo
  • Journal Title: Aerosol Sci. Tech Volume: 45 Issue: 10 Pages: 1184-1198
  • DOI: 10.1080/02786826.2011.583299
  • Peer Reviewed
• [Journal Article] Dependence of laser-induced incandescenceon physical properties of black carbonaerosols : Measurements and theoreticalinterpretation (2010)
  • Author(s): N. Moteki, and Y. Kondo
  • Journal Title: Aerosol Science andTechnology Volume: 44 : 8 Pages: 663-675
• [Journal Article] Method to measure refractiveindices of small nonspherical particles : Application to black carbon particles (2010)
  • Author(s): N. Moteki, Y. Kondo, and S. Nakamura
  • Journal Title: Journal of Aerosol Science Volume: 41 Pages: 513-521
• [Journal Article] Radiative transfermodeling of filter-based measurements oflight absorption by particles : Importanceof particle size dependent penetrationdepth (2010)
  • Author(s): N. Moteki, Y. Kondo, T. Nakayama, K. Kita, L. K. Sahu, T. Ishigai, T. Kinase, Y. Matsumi
  • Journal Title: Journal of Aerosol Science Volume: 41 Pages: 401-412
• [Journal Article] Dependence of laser-induced incandescence on physical properties of black carbonaerosols : Measurements and theoretical interpretation (2010)
  • Author(s): Moteki, N., Y.Kondo
  • Journal Title: Aerosol Science and Technology Volume: 44 Pages: 663-675
  • Peer Reviewed
• [Journal Article] Method to measure refractive indices of small nonspherical particles : Application to black carbon particles (2010)
  • Author(s): Moteki, N., Y.Kondo, S.Nakamura
  • Journal Title: Journal of Aerosol Science Volume: 41 Pages: 513-521
  • Peer Reviewed
• [Journal Article] Radiative transfer modeling of filter-based measurements of light absorption by particles : Importance of particle size dependent penetration depth (2010)
  • Author(s): Moteki, N., Y.Kondo, T.Nakayama, 他5名
  • Journal Title: Journal of Aerosol Science Volume: 41 Pages: 401-412
  • Peer Reviewed
• [Presentation] 微粒子から放出される熱輻射光の偏光.方位依存性の検証実験 (2011)
  • Author(s): 茂木信宏,竹川暢之,小泉和裕,中村貴之,近藤豊
  • Organizer: 日本気象学会春季大会
  • Place of Presentation: 東京都国立オリンピック記念青少年総合センター
  • Year and Date: 2011-05-20
• [Presentation] 微粒子から放出される熱幅射光の偏光・方位依存性の検証実験 (2011)
  • Author(s): 茂木信宏, 竹川暢之, 他3名
  • Organizer: 日本気象学会2011年度春季大会
  • Place of Presentation: 東京都国立オリンピック記念青少年総合センター
  • Year and Date: 2011-05-20
• [Presentation] 光学的手法による浮遊エアロゾルの形状分析法の開発 (2010)
  • Author(s): 茂木信宏,竹川暢之,小泉和裕,中村貴之,近藤豊
  • Organizer: 大気化学討論会
  • Place of Presentation: 首都大学東京
  • Year and Date: 2010-11-19
• [Presentation] 光学的手法による浮遊エアロゾルの形状分析法の開発 (2010)
  • Author(s): 茂木信宏, 竹川暢之, 他3名
  • Organizer: 大気化学討論会
  • Place of Presentation: 首都大学東京(南大沢)
  • Year and Date: 2010-11-19