气溶胶粒子特性和垂直分布对辐射的影响

发布时间：2018-01-15 11:31

本文关键词：气溶胶粒子特性和垂直分布对辐射的影响　出处：《红外与激光工程》2016年02期 　论文类型：期刊论文

【摘要】：数值模拟了在给定条件下气溶胶粒子群平均有效半径和折射率虚部不同时大气层顶的反射强度和到达地面的透射强度,以及不同气溶胶垂直分布对各高度层的反射、透射强度和辐照度的影响。结果表明,当大气气溶胶光学厚度相同时,气溶胶垂直分布对15 km以下的反射和透射辐射影响较大;气溶胶粒子群平均有效半径和折射率虚部越小,大气层顶的反射强度和到达地面的透射强度越大。因此,对于准确地计算大气辐射不仅需要考虑气溶胶总光学厚度,还需考虑气溶胶粒子群的平均有效半径、复折射率和气溶胶垂直分布;计算中若只使用气溶胶模型中的经验值会带来较大误差。
[Abstract]:The mean effective radius and refractive index imaginary part of aerosol particle swarm under given conditions are numerically simulated. The reflection intensity of the top of the atmosphere and the transmission intensity to the ground are different. The effects of the vertical distribution of aerosols on the reflectance, transmission intensity and irradiance of each height layer are also discussed. The results show that the atmospheric aerosol optical thickness is the same. The vertical distribution of aerosol has a great influence on the reflection and transmission radiation below 15 km. The smaller the average effective radius and refractive index imaginary part of aerosol particle swarm, the greater the reflection intensity of the top of the atmosphere and the transmission intensity to the ground. For accurate calculation of atmospheric radiation, not only the total optical thickness of aerosol should be considered, but also the average effective radius of aerosol particle swarm, the complex refractive index and the vertical distribution of aerosol should be considered. If only the experience value in aerosol model is used in the calculation, the error will be great.
【作者单位】：中国科学院安徽光学精密机械研究所大气成分与光学重点实验室;中国科学院大学;
【基金】：公益性行业(气象)科研专项(GYHY201106002-03)
【分类号】：X513;P422
【正文快照】： 0引言大气气溶胶是影响辐射传输的一个重要因素,它通过不断散射和吸收太阳短波辐射及地球长波辐射影响大气辐射传输,其散射和吸收特性由气溶胶数浓度、谱分布及复折射率等微物理特征决定[1],其中大气气溶胶折射率决定了气溶胶在辐射和气候效应中的作用是加热还是冷却,同时它对

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