2011 Fiscal Year Final Research Report
Humidity dependence of aerosol optical properties of light absorbing aerosols
| Project/Area Number |
21710007
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Environmental dynamic analysis
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| Research Institution | Nagoya University |
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Principal Investigator |
NAKAYAMA Tomoki 名古屋大学, 太陽地球環境研究所, 助教 (40377784)
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| Project Period (FY) |
2009 – 2011
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| 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 |
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| 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.
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