Abstract
Abstract. In this work various microphysical properties including mass concentration, size distribution and morphology of aerosol particles generated by laser ablation of a high purity graphite sample were investigated in detail. Supplementary chemical analysis of the generated particles including microstructure investigation by high-resolution transmission electron microscopy (HRTEM) and Raman spectroscopy were also made. These measurements proved that the proposed method can be used to model the real atmospheric carbonaceous particulate under various climate relevant conditions regarding its specific properties investigated here. However, to introduce the presented methodology as a novel BC surrogate, further improvement and investigation including simplification in experimental setup, comprehensive analysis of thermochemical refractiveness and optical responses of the generated particles as well as comparative study with the presently available concurrent surrogates are required. The related results of these issues are planned to be demonstrated in other studies.
Highlights
Combustion-generated carbon particles have been in the focus of scientific interest, primarily because of their influence on climate as well as their adverse effects on human health (IPCC, 2007; Pope III and Dockery, 1999)
Atmospheric soot is a mixture of most refractory particles having strong but featureless optical absorption properties called elemental carbon (EC) or black carbon (BC) and organic carbon (OC) that can have a wide range of thermal and optical absorption characteristics
Many instruments have been developed and optimized to measure these quantities, one of the major obstacles to reduce uncertainties associated with the measured data is the lack of a soot standard reference material which is able to model the specific properties of the atmospheric soot that is measured (Baumgardner et al, 2012; Gysel et al, 2011)
Summary
Combustion-generated carbon particles (soot) have been in the focus of scientific interest, primarily because of their influence on climate as well as their adverse effects on human health (IPCC, 2007; Pope III and Dockery, 1999). According to the latest scientific assessment, atmospheric soot, which is the by-product of incomplete combustion of both fossil and biomass fuel as well as biomass burning, is the second most important anthropogenic emission. The parameters generally used to characterize atmospheric soot are very complex, have great variety, and depend on the initial burning conditions or the type of fuel and on many environmental factors.
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