内混合气溶胶粒子的有效吸收对激光大气传输有着不利影响。以黑碳和氯化钠两种典型成分为例, 计算了密度和比热相同情况下, 均匀球和分层球模型粒子的有效吸收系数。研究结果表明: 有效吸收系数大小与粒子组分混合方式有关。在粒子吸收热量加热大气过程中, 黑碳为核的粒子在可见光和近红外波段有效吸收系数更大; 均匀球粒子在中红外波段和远红外波段(100 μs后)有效吸收系数更大, 而氯化钠为核的粒子在远红外波段(前100 μs)有效吸收系数最大。

Effective absorption of internal mixed aerosol has severe negative effects on laser transmission in atmosphere. The effective absorption coefficients of homogeneous sphere model, BC-core model and NaCl-core model aerosols, with the same density and specific heat of particle, were discussed by Mie theory. Results show that effective absorption is associated with comprising method. The BC-core sphere particles mainly show superior effective absorption at short wavelength as visible light and infrared light, homogeneous sphere particles mainly super at mid-infrared wavelength and far-infrared wavelength after 100 μs, while NaCl-core particles mainly show larger effective absorption coefficient at far-infrared wavelength at beginning of heating procedure.