Humidity dependence of aerosol optical properties of light absorbing aerosols

• Project/Area Number: 21710007
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Environmental dynamic analysis
• Research Institution: Nagoya University
• Principal Investigator: NAKAYAMA Tomoki 名古屋大学, 太陽地球環境研究所, 助教 (40377784)
• Project Period (FY): 2009 – 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: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000); Fiscal Year 2009: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
• Keywords: 気候変動 / エアロゾル / 光学特性 / 消散係数 / 湿度依存性 / キャビティリングダウン法 / ブラックカーボン / 有機エアロゾル / 地球温暖化 / 放射収支 / 大気エアロゾル / 湿度依存症 / レーザー分光

Research Abstract

Understanding of relative humidity(RH) dependence of optical properties of atmospheric aerosols is essential to estimate their effects on radiation balance in the Earth's atmosphere. In this work, we have developed a cavity ring-down spectrometer to measure RH dependence of aerosol extinction coefficients. By applying the instrument to observational and laboratory studies, it is found that the refractive index, chemical compositions, and mixing states of aerosols play important roles to determine the RH dependence of extinction coefficients.

Research Products

• [Journal Article] 有機エアロゾルの光吸収特性 (2012)
  • Author(s): 中山智喜
  • Journal Title: エアロゾル研究 Volume: 27 Pages: 13-23
  • NAID: 130002080940
  • Peer Reviewed
• [Journal Article] Measurements of light absorption enhancement of black carbon using a photoacoustic spectrometer in Nagoya, Japan (2012)
  • Author(s): T.Nakayama, 他6名
  • Journal Title: Proceedings of "International symposium on aerosol studies explored by electron microscopy" Volume: (印刷中)
• [Journal Article] Particle effective density measurements using a DMA-APM-CPC system in Nagoya, Japan : Estimation of mixing state and shape (2012)
  • Author(s): T.Nakayama, 他6名
  • Journal Title: Proceedings of "International symposium on aerosol studies explored by electron microscopy" Volume: (印刷中)
• [Journal Article] Characterization of aerosol particles in the Tokyo metropolitan area using two different particle mass spectrometers (2011)
  • Author(s): J.-H. Xing, T. Nakayama, (他11名)
  • Journal Title: Aerosol Sci. Technol Volume: 45 Pages: 315-326
  • Peer Reviewed
• [Journal Article] Observation of carbon and oxygen isotopic compositions of CO_2 at an urban cite in Nagoya using Mid-IR laser absorption spectroscopy (2011)
  • Author(s): R. Wada, T. Nakayama, (他5名)
  • Journal Title: Atmos. Environ Volume: 45 Pages: 1168-1174
  • Peer Reviewed
• [Journal Article] Comparison of laser-induced fluorescence and chemiluminescence measurements of NO_2 at an urban site (2011)
  • Author(s): H. Suzuki, T. Nakayama, (他6名)
  • Journal Title: Atmos. Environ Volume: 45 Pages: 6233-6240
  • Peer Reviewed
• [Journal Article] Comparison of laser-induced fluorescence and chemiluminescence measurements of NO_2 at an urban site (2011)
  • Author(s): Suzuki, H., Miyao, Y., Nakayama, T., Pearce, J.K., Matsumi, Y., Takahashi, K., Kita, K., Tonokura, K.
  • Journal Title: Atmos.Environ Volume: VOL.45 Issue: 34 Pages: 6233-6240
  • DOI: 10.1016/j.atmosenv.2011.07.065
  • Peer Reviewed
• [Journal Article] Characterization of aerosol particles in the Tokyo metropolitan area using two different particle mass spectrometers (2011)
  • Author(s): J.-H.Xing, T.Nakayama, 他11名
  • Journal Title: Aerosol Science and Technology Volume: 45 Pages: 315-326
  • Peer Reviewed
• [Journal Article] Observation of carbon and oxygen isotopic compositions of CO_2 at an urban cite in Nagoya using Mid-IR laser absorption spectroscopy (2011)
  • Author(s): R.Wada, T.Nakayama, 他5名
  • Journal Title: Atmospheric Environment Volume: 45 Pages: 1168-1174
  • Peer Reviewed
• [Journal Article] Size-dependent correction factors for absorption measurements using filter-based photometers : PSAP and COSMOS (2010)
  • Author(s): T. Nakayama, (他6名)
  • Journal Title: J. Aerosol Sci Volume: 41 Pages: 333-343
  • 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): N. Moteki, T. Nakayama, (他6名)
  • Journal Title: J. Aerosol Sci Volume: 41 Pages: 401-412
  • Peer Reviewed
• [Journal Article] Measurements of aerosol optical properties in central Tokyo during summertime using cavity ring-down spectroscopy : Comparison with conventional techniques (2010)
  • Author(s): T. Nakayama, (他10名)
  • Journal Title: Atmos. Environ Volume: 44 Pages: 3034-3042
  • Peer Reviewed
• [Journal Article] Laboratory studies on optical properties of secondary organic aerosols generated during the photo oxidation of toluene and the ozonolysis ofτ-pinene (2010)
  • Author(s): T. Nakayama, (他5名)
  • Journal Title: J. Geophys. Res Volume: 115 Issue: D24
  • DOI: 10.1029/2010jd014387
  • Peer Reviewed
• [Journal Article] Fluorescence detection of atmospheric nitrogen dioxide using a blue light-emitting diode as an excitation source (2010)
  • Author(s): Y. Matsumi, T. Nakayama, (他4名)
  • Journal Title: Appl. Opt Volume: 49 Pages: 3762-3767
  • Peer Reviewed
• [Journal Article] PLP-LIF Study of the reactions of chlorine atoms with C_2H_2, C_2H_4, and C_3H_6 in 2-100 Torr of N2 diluent at 295 K (2010)
  • Author(s): E. Iwasaki、T. Nakayama, (他3名)
  • Journal Title: Chem. Phys. Lett Volume: 494 Pages: 174-178
  • Peer Reviewed
• [Journal Article] レーザーを用いた大気微量成分のリアルタイムその場計測 (2010)
  • Author(s): 中山智喜、松見豊
  • Journal Title: 月刊オプトロニクス Volume: 11 Pages: 127-133
• [Journal Article] Measurements of aerosol optical properties in central Tokyo during summertime using cavity ring-down spectroscopy : Comparison with conventional techniques (2010)
  • Author(s): T.Nakayama, 他10名
  • Journal Title: Atmospheric Environment Volume: 44 Pages: 3034-3042
  • Peer Reviewed
• [Journal Article] Laboratory studies on optical properties of secondary organic aerosols generated during the photooxidation of toluene and the ozonolysis of α-pinene (2010)
  • Author(s): T.Nakayama, 他5名
  • Journal Title: Journal of Geophysical Research Volume: 115
  • Peer Reviewed
• [Journal Article] Fluorescence detection of atmospheric nitrogen dioxide using a blue light-emitting diode as an excitation source (2010)
  • Author(s): Y.Matsumi, T.Nakayama, 他4名
  • Journal Title: Applied Optics Volume: 49 Pages: 3762-3767
  • Peer Reviewed
• [Journal Article] PLP-LIF Study of the reactions of chlorine atoms with C_2H_2, C_2H_4, and C_3H_6 in 2-100 Torr of N_2 diluent at 295K (2010)
  • Author(s): E.Iwasaki, T.Nakayama, 他3名
  • Journal Title: Chemical Physics Letters Volume: 494 Pages: 174-178
  • Peer Reviewed
• [Journal Article] Size-dependent correction factors for absorption measurements using filter-based photometers : PSAP and COSMOS (2010)
  • Author(s): T.Nakayama, (他6名)
  • Journal Title: Journal of Aerosol Science 41 Pages: 333-343
  • 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): N.Moteki, T.Nakayama, (他6名)
  • Journal Title: Journal of Aerosol Science 41 Pages: 401-412
  • Peer Reviewed
• [Journal Article] Optical properties and chemical compositions of iodine-containing aerosols produced from the atmospheric photolysis of methylene iodide in the presence of ozone (2009)
  • Author(s): Y. Sakamoto, T. Nakayama, (他3名)
  • Journal Title: Bull. Chem. Soc. Jpn Volume: 82 Pages: 910-913
  • NAID: 10025126647
  • Peer Reviewed
• [Journal Article] Stabilization of the mass absorption cross section of black carbon for filter-based absorption photometry by the use of a heated inlet (2009)
  • Author(s): Y. Kondo, T. Nakayama, (他11名)
  • Journal Title: Aerosol Sci. Technol Volume: 43 Pages: 741-756
  • Peer Reviewed
• [Journal Article] Buffer-gas pressure broadening for the third overtone band of NO measured with continuous-wave cavity ring-down spectroscopy (2009)
  • Author(s): Y. Sakamoto, T. Nakayama, (他4名)
  • Journal Title: Chem. Lett. Volume: 38 Pages: 1000-1001
  • NAID: 10025547428
  • Peer Reviewed
• [Journal Article] Atmospheric Chemistry of BrO Radicals : Kinetics of the Reaction with C_2H_5O_2 Radicals at 233. 333 K (2009)
  • Author(s): Y. Sakamoto, T. Nakayama, (他7名)
  • Journal Title: J. Phys. Chem. A Volume: 113 Pages: 10231-10237
  • Peer Reviewed
• [Journal Article] Measurements of light absorption enhancement of black carbon using a photoacoustic spectrometer in Nagoya
  • Author(s): T. Nakayama, (他6名)
  • Journal Title: Technical reports of the meteorological research institute Volume: No.68
• [Journal Article] Particle effective density measurements using a DMA-APM-CPC system in Nagoya, Japan : Estimation of mixing state and shape
  • Author(s): T. Nakayama, (他6名)
  • Journal Title: Technical reports of the meteorological research institute Volume: No.68
• [Journal Article] Wavelength and NOx dependent complex refractive index of SOAs generated from the photooxidation of toluene
  • Author(s): T. Nakayama, (他5名)
  • Journal Title: Atmos. Chem. Phys. Discuss
  • Peer Reviewed
• [Presentation] Determination of refractive index of secondary organic aerosols generated during the photo oxidation of toluene and the ozonolysis of alpha-pinene (2012)
  • Author(s): T. Nakayama,(他4名)
  • Organizer: AAAR 30^(th) Annual Conference
  • Place of Presentation: オーランド(米国)
• [Presentation] Measurements of light absorption enhancement of black carbon using a photo acoustic spectrometer in Nagoya, Japan (2012)
  • Author(s): T. Nakayama,(他6名)
  • Organizer: International symposium on aerosol studies explored by electron microscopy
  • Place of Presentation: 気象研究所(茨城県)
• [Presentation] Measurements of light absorption enhancement of black carbon using a photoacoustic spectrometer in Nagoya, Japan (2012)
  • Author(s): T.Nakayama, 他6名
  • Organizer: International symposium on aerosol studies explored by electron microscopy
  • Place of Presentation: 気象研究所(茨城県)(招待講演)
• [Presentation] Particle effective density measurements using a DMA-APM-CPC system in Nagoya, Japan : Estimation of mixing state and shape (2012)
  • Author(s): T.Nakayama, 他6名
  • Organizer: International symposium on aerosol studies explored by electron microscopy
  • Place of Presentation: 気象研究所(茨城県)(招待講演)
• [Presentation] 二次有機エアロゾルの光吸収特性と化学特性の関係 (2012)
  • Author(s): 中山智喜, 他3名
  • Organizer: 第92回日本化学会春季年会
  • Place of Presentation: 慶應義塾大学日吉キャンパス(神奈川県)
• [Presentation] 光音響分光法を用いたディーゼル排ガス微粒子の光学特性の計測 (2011)
  • Author(s): 中山智喜
  • Organizer: 第7回エアロゾル学会若手フォーラム
  • Place of Presentation: キャンパスイノベーションセンター東京(東京都)(招待講演)
  • Year and Date: 2011-10-25
• [Presentation] Applications of cavity ring-down aerosol extinction spectrometer to laboratory and field studies (2011)
  • Author(s): T. Nakayama,(他8名)
  • Organizer: User meeting and summer school Cavity Enhanced Spectroscopy
  • Place of Presentation: キングストン(カナダ)
• [Presentation] Applications of cavity ring-down aerosol extinction spectrometer to laboratory and field studies (2011)
  • Author(s): T.Nakayama, 他7名
  • Organizer: User meeting and summer school "Cavity Enhanced Spectroscopy
  • Place of Presentation: Queen's University(カナダ・キングストン)
• [Presentation] 信楽における下部対流圏エアロゾル・微量気体成分の観測 (2011)
  • Author(s): 矢吹正教, 中山智喜, 他6名
  • Organizer: 日本気象学会2011年春季年会
  • Place of Presentation: 国立オリンピック記念青少年総合センター(東京都)
• [Presentation] 2010年夏季名古屋におけるエアロゾル光吸収の波長依存性の観測 (2011)
  • Author(s): 後藤佑樹, 中山智喜, 他3名
  • Organizer: 日本地球惑星科学連合2011年大会
  • Place of Presentation: 京都大学宇治キャンパス(京都府)
• [Presentation] 新しい計測手法を用いたエアロゾル光学特性の研究 (2011)
  • Author(s): 中山智喜, 他1名
  • Organizer: 第28回エアロゾル科学・技術研究討論会
  • Place of Presentation: 大阪府立大学中百舌鳥キャンパス(大阪府)
• [Presentation] Determination of refractive index of secondary organic aerosols generated during the photooxidation of toluene and the ozonolysis of alpha-pinene (2011)
  • Author(s): T.Nakayama, 他5名
  • Organizer: AAAE 30^<th> Annual Conference
  • Place of Presentation: Rosen Single Creek Resort(米国・オーランド)
• [Presentation] トルエンの光酸化反応により生成する二次有機エアロゾルの光吸収特性 (2011)
  • Author(s): 中山智喜, 他7名
  • Organizer: 第17回大気化学討論会
  • Place of Presentation: 京都大学宇治キャンパス(京都府)
• [Presentation] 二次有機エアロゾルの密度と化学成分の関係 (2011)
  • Author(s): 後藤祐樹, 中山智喜, 他4名
  • Organizer: 第17回大気化学討論会
  • Place of Presentation: 京都大学宇治キャンパス(京都府)
• [Presentation] エアロゾル光学特性の湿度依存性と吸湿特性の関係 (2010)
  • Author(s): 中山智喜,(他4名)
  • Organizer: 日本地球惑星科学連合2010年大会
  • Place of Presentation: 幕張メッセ国際会議場(千葉県)
• [Presentation] Laboratory studies on optical properties of secondary organic aerosols generated during the photo oxidation of toluene and the ozonolysis of alpha-pinene (2010)
  • Author(s): T. Nakayama,(他3名)
  • Organizer: 2010 iCACGP-IGAC Conference
  • Place of Presentation: ハリファックス(カナダ)
• [Presentation] 東京都心におけるエアロゾル消散係数の湿度依存性と化学成分の同時観測 (2010)
  • Author(s): 鏡谷聡美、中山智喜,(他4名)
  • Organizer: 第27回エアロゾル科学・技術研究討論会
  • Place of Presentation: 名古屋大学
• [Presentation] 大気エアロゾルの光学特性の湿度依存性と吸湿特性 (2010)
  • Author(s): 中山智喜,(他4名)
  • Organizer: 第27回エアロゾル科学・技術研究討論会
  • Place of Presentation: 名古屋大学
• [Presentation] エアロゾル光学特性の湿度依存性と吸湿特性の関係 (2010)
  • Author(s): 中山智喜, 他4名
  • Organizer: 日本地球惑星科学連合2010年大会
  • Place of Presentation: 幕張メッセ国際会議場
• [Presentation] 2009年夏季東京都心におけるエアロゾル消散係数の湿度依存性と化学成分の同時観測 (2010)
  • Author(s): 鏡谷聡美、中山智喜, 他4名
  • Organizer: 日本地球惑星科学連合2010年大会
  • Place of Presentation: 幕張メッセ国際会議場
• [Presentation] 東京における黒色炭素エアロゾルの光吸収量と被覆による変化 (2010)
  • Author(s): 木名瀬健、中山智喜, 他6名
  • Organizer: 日本地球惑星科学連合2010年大会
  • Place of Presentation: 幕張メッセ国際会議場
• [Presentation] Formation processes of light absorbing secondary organic aerosols : Imapact on the Earth's radiation balance (2010)
  • Author(s): T.Nakayama, 他3名
  • Organizer: 第26回化学反応討論会
  • Place of Presentation: 広島大学
• [Presentation] Laboratory studies on optical properties of secondary organic aerosols generated during the photooxidation of toluene and the ozonolysis of alpha-pinene (2010)
  • Author(s): T.Nakayama, 他3名
  • Organizer: 2010 iCACGP-IGAC Conference
  • Place of Presentation: Dalhousie University, Halifax, Canada
• [Presentation] 大気エアロゾルの光学特性の湿度依存性と吸湿特性の関係 (2010)
  • Author(s): 中山智喜, 他4名
  • Organizer: 第27回エアロゾル科学・技術研究討論会
  • Place of Presentation: 名古屋大学
• [Presentation] 三波長光音響分光装置(PASS-3)によるエアロゾル光学特性計測:装置の性能評価と屈折率測定への応用 (2010)
  • Author(s): 中山智喜, 他4名
  • Organizer: 第16回大気化学討論会
  • Place of Presentation: 首都大学東京
• [Presentation] 三波長光音響分光装置(PASS-3)を用いた名古屋におけるエアロゾル光吸収の波長依存性計測 (2010)
  • Author(s): 後藤祐樹、中山智喜, 他3名
  • Organizer: 第16回大気化学討論会
  • Place of Presentation: 首都大学東京
• [Presentation] 大気エアロゾルの光学特性の湿度依存性と吸湿特性の関係 (2010)
  • Author(s): 中山智喜, 他4名
  • Organizer: 第16回大気化学討論会
  • Place of Presentation: 首都大学東京
• [Presentation] 東京で観測されたBC粒子の吸収係数・質量断面積の変化 (2010)
  • Author(s): 菅原千佳、中山智喜, 他5名
  • Organizer: 第16回大気化学討論会
  • Place of Presentation: 首都大学東京
• [Presentation] Size-dependent correction factors for absorption measurements using filter-based photometers : PSAP and COSMOS (2009)
  • Author(s): T.Nakayama, (他6名)
  • Organizer: International Workshop "Frontiers of Black Carbon Studies"
  • Place of Presentation: Research Center for Advanced Science and Technology, The University of Tokyo
  • Year and Date: 2009-01-25
• [Presentation] Development of cavity ring-down aerosol extinction spectrometer and application to the ambient observations in central Tokyo (2009)
  • Author(s): T. Nakayama,(他8名)
  • Organizer: Workshop on Chemistry in the Earth's Atmosphere
  • Place of Presentation: 東京工業大学
• [Presentation] 夏季東京都心におけるエアロゾル光学特性と化学特性の同時観測 (2009)
  • Author(s): 中山智喜, (他13名)
  • Organizer: 気象学会2009年度春季大会
  • Place of Presentation: つくば国際会議場
• [Presentation] 二次有機エアロゾルはBrownCarbonとなりうるか?:光学特性の実験的研究 (2009)
  • Author(s): 中山智喜, (他5名)
  • Organizer: 気象学会2009年度春季大会
  • Place of Presentation: つくば国際会議場
• [Presentation] Development of cavity ring-down aerosol extinction spectrometer and application to the ambient observations in central Tokyo (2009)
  • Author(s): T.Nakayama, (他8名)
  • Organizer: Workshop on Chemistry in the Earth's Atmosphere
  • Place of Presentation: Tokyo Institute of Technology
• [Presentation] キャビティリングダウン分光法によるN2O5熱分解反応速度の測定 (2009)
  • Author(s): 中山智喜, (他3名)
  • Organizer: 第3回分子科学討論会
  • Place of Presentation: 名古屋大学
• [Presentation] エアロゾル消散係数の湿度依存性と化学組成との関係に関する観測研究 (2009)
  • Author(s): 鏡谷聡美、中山智喜, (他8名)
  • Organizer: 第15回大気化学討論会
  • Place of Presentation: つくば国際会議場
• [Presentation] フィルター光吸収法(PSAP, COSMOS)によるエアロゾル吸収係数測定における系統誤差の実験的評価 (2009)
  • Author(s): 中山智喜, (他6名)
  • Organizer: 第15回大気化学討論会
  • Place of Presentation: つくば国際会議場
• [Presentation] Could Secondary Organic Aerosols Act as Brown Carbon? : Laboratory Studies of Aerosol Absorption (2009)
  • Author(s): T.Nakayama, (他5名)
  • Organizer: IGAC-SPARC Joint Workshop in Kyoto, The One Atmosphere : Integration, Interface, and Impact
  • Place of Presentation: Inamori Hall at Shiran-Kaikan in Kyoto
• [Presentation] Simultaneous measurements of relative humidity dependence of light extinction and aerosol chemical compositions in central Tokyo during summer 2009 (2009)
  • Author(s): S.Kagamitani, T.Nakayama, (他8名)
  • Organizer: IGAC-SPARC Joint Workshop in Kyoto, The One Atmosphere : Integration, Interface, and Impact
  • Place of Presentation: Inamori Hall at Shiran-Kaikan in Kyoto
• [Presentation] Measurement of Optical Properties of Secondary Organic Aerosols (2009)
  • Author(s): T.Nakayama, (他5名)
  • Organizer: The 4th J-C-K Joint Conference on Meteorology
  • Place of Presentation: つくば国際会議場