Abstract:In the present paper, the infrared spectrum of aerosol and NH4NO3 was analysed and compared, and the result showed that the infrared spectral features of aerosol are consistent with that of NH4NO3. The absorption coefficient α and the mass absorption cross section κ of NO-3 was calculated by the transmissivity of NO-3 in NH4NO3 according to Beer-Lambert law. Then the imaginary part of the complex refractive index was calculated through α. The real part of the complex refractive index was derived from the K-K(Kramers-Kroning)relationship. It has important significance for further research on the scattering and absorption characteristics of the different composition of the atmospheric aerosol through analysing the results of the experiment.
[1] Shine K P, Forster P M D. Global and Planetary Change, 1999, 20(4): 205. [2] Myhre G, Myhre A, Stordal F. Atmospheric Environment, 2001, 35(13): 2361. [3] DONG Yun-sheng, LIU Wen-qing, LIU Jian-guo, et al(董云升, 刘文清, 刘建国, 等). Acta Optica Sinica(光学学报), 2009, 29(2): 292. [4] Verma S, Boucher O, Upadhyaya H C, et al. Atmospheric Environment, 2006, 40(40): 7953. [5] Twomey S A, Piepgrass M, Wolfe T L. Tellus Series B-Chemical and Physical Meteorology, 1984, 36(5): 356. [6] Twomey S A. Radiative Properties of Clouds. In: Jennings S. G Ed. Aerosol Effects on Climate. Tucson: The Univ. of Arizona press, 1993. 275. [7] Pueschel R F. Potential Climate Effects of Anthropogenic Aerosols. In: Jennings S G Ed. Aerosol Effects on Climate. Tucson: The Univ. of Arizona Press, 1993. 110. [8] Verma S K, Deb M K. Analytica Chimica Acta, 2007, 582(2): 382. [9] LI Xue-bin, HU Shun-xing, XU Qing-shan(李学彬, 胡顺星, 徐青山). High Power Laser and Particle Beams(强激光与粒子束), 2007, 19(2): 207. [10] Tuminello P S, Arakawa E T, Khare B N, et al. Applied Optics, 1997, 36(13): 2818. [11] Soldera A, Monterrat E. Polymer, 2002, 43(22): 6027.