Finely dispersed brown carbon in a smoggy atmosphere

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• 作者：G. I. Gorchakov ; A. V. Vasiliev ; K. S. Verichev…
• 刊名：Doklady Earth Sciences
• 出版年：2016
• 出版时间：November 2016
• 年：2016
• 卷：471
• 期：1
• 页码：1158-1163
• 全文大小：
• 刊物主题：Earth Sciences, general;
• 出版者：Pleiades Publishing
• ISSN：1531-8354
• 卷排序：471

文摘

It is shown that the absorption capacity of smoke aerosol during mass forest and forest–peat fires is determined to a considerable degree by light absorbing organic compounds or brown carbon. According to the data from the AERONET global network of stations [1], the absorption spectra of smoke aerosol vary significantly if airborne particulate matter is contained in brown carbon. It is established that in several cases, the absorption spectra of smoke aerosol are approximated with satisfactory accuracy by exponents. It is shown that the finely dispersed (submicron) fraction of the smoke aerosol makes a major contribution to its optical characteristics in the 0.44–1.02 μm spectral region. Strong variation in the single scattering albedo is discovered in the presence of brown carbon in the smoke aerosol. It is shown that the optical characteristics of coarsely dispersed and finely dispersed fractions of smoke aerosol differ considerably.