Carlon H R
Appl Opt. 1980 Apr 1;19(7):1165-72. doi: 10.1364/AO.19.001165.
Mass extinction coefficients of soil-derived atmospheric dusts often are determined largely by the absorption (rather than scattering) by individual particles, especially at longer IR wavelengths. Under many conditions, reasonable estimates of mass extinction coefficients of dusts can be made from absorption coefficients without the need for detailed knowledge of particle optical constants to perform, e.g., Mie calculations. This paper discusses absorption coefficients of dusts in the visible and IR wavelengths and the physical mechanisms of dust aerosol generation determining that portion of extinction attributable to absorption in a given dust cloud. Some soils, especially clays, can produce dust clouds that are almost pure. absorbers at longer IR wavelengths.
土壤源大气尘埃的质量消光系数通常在很大程度上由单个颗粒的吸收（而非散射）决定，尤其是在较长的红外波长下。在许多情况下，无需详细了解颗粒光学常数来进行例如米氏计算，就可以根据吸收系数对尘埃的质量消光系数做出合理估计。本文讨论了可见光和红外波长下尘埃的吸收系数，以及决定给定尘埃云中吸收所致消光部分的尘埃气溶胶生成的物理机制。一些土壤，尤其是粘土，能够产生在较长红外波长下几乎是纯吸收体的尘埃云。
