Abstract
Black carbon (BC), a component of carbonaceous material, has an important role in the environment, and it is considered a short-lived climate forcer that plays a vital role in the global climate system. BC concentrations were analyzed during 2017 in two sites in Mexico, Juriquilla and Altzomoni, which have different emission sources and atmospheric dynamics. The annual average BC concentrations in 2017 were 0.84 ± 0.70 and 0.58 ± 0.37 µg m−3 for Juriquilla and Altzomoni, respectively. The principal contributors for the highest BC concentration in Juriquilla were anthropogenic sources, while pollutants transport from nearby cities was more important for Altzomoni. Comparison between this analysis and previous reports from 2015 for both sampling sites demonstrated an increase in BC concentration. Results of this study could contribute to a better understanding of BC effects under different emission conditions and provide a scientific reference for developing BC reduction strategies over Mexico.
Highlights
Black carbon (BC) is a component of carbonaceous material produced by emissions from anthropogenic combustion sources, including industrial emissions, road transport, electricity generating units, other power production sources, domestic heating and biomass burning [1,2,3,4]
The present work aims at monitoring the BC concentrations in two sites of Mexico during 2017, Juriquilla and Altzomoni, and compares the data with the results from Peralta et al [18] from 2015 in order to assess the changes in BC concentration between these two years
The data analysis in this study shows an increase in annual BC concentrations in 2017 compared to 2015 in two sites in Mexico (JQRO and ALTZ)
Summary
Black carbon (BC) is a component of carbonaceous material produced by emissions from anthropogenic combustion sources, including industrial emissions, road transport (fossil fuels such as gasoline and diesel), electricity generating units, other power production sources, domestic heating and biomass burning (wood and crop residues) [1,2,3,4] It is distinguishable from other carbon materials contained in atmospheric aerosol because of the following physical properties: (a) it strongly absorbs visible light at all visible wavelengths (the ability to retain and transform solar radiation into heat); (b) it is refractory (vaporization temperature near 4000 K); (c) it is insoluble in water, organic solvents and other components of atmospheric aerosol; and (d) it exists as an aggregate of tiny carbon spherules [5,6,7]. The present work aims at monitoring the BC concentrations in two sites of Mexico during 2017, Juriquilla (semi-urban site) and Altzomoni (high-altitude site), and compares the data with the results from Peralta et al [18] from 2015 in order to assess the changes in BC concentration between these two years
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