タイトル(掲載誌)Proceedings of the CEReS international symposium = CEReS国際シンポジウム資料集
一般注記type:text
[ABSTRACT]In order to investigate optical properties of aerosol, scattering coefficients and absorption coefficients have been continuously measured since January, 2002 using integrating nephelometer (TSI model 3563) and absorption photometer (Radiance Research PSAP, PSAP3λ) on dry condition at Tsukuba, Japan. Using these data, the recent 10 years trend of aerosol properties and climatology was investigated. The results show that the aerosol characteristics have seasonal variation and the tendencies to decrease or increase. These tendencies were significant in the confidence level 95%. The extinction, scattering, and absorption coefficients (1/m) had trends to decrease in the period from 2002 to 2012; -6.05x10-6, -4.94x10-6(1/year) at wavelength of 550nm and -1.11x10- 6(1/year) at wavelength 526nm, respectively. The Single scattering albedo has the trends to increase in the same period; 4.27x10-3(1/year) at wavelength of 550nm. Asymmetry factors have the trends to decrease in the same period; -2.22 x10-3(1/year) at wavelength 550nm. The extinction ?ngstr?m exponent has the tendency to increase, and the effective radius has the tendency to decrease. These tendencies are consistent with the tendency of asymmetry factor. The values of absorption ?ngstr?m exponent were about 1.0 and have seasonal variation. The absorption ?ngstr?m exponent had the trend to increase in the period from 2006 to 2012; 1.15x10-2(1/year). The change of absorption ?ngstr?m exponent suggests the change in the composition of light absorbing aerosol.
一次資料へのリンクURLhttps://opac.ll.chiba-u.jp/da/curator/107461/ceresIntlSympo-19-P040.pdf
連携機関・データベース国立情報学研究所 : 学術機関リポジトリデータベース(IRDB)(機関リポジトリ)