Large historical changes of fossil‐fuel black carbon aerosols
Citations Over TimeTop 10% of 2003 papers
Abstract
Anthropogenic emissions of fine black carbon (BC) particles, the principal light‐absorbing atmospheric aerosol, have varied during the past century in response to changes of fossil‐fuel utilization, technology developments, and emission controls. We estimate historical trends of fossil‐fuel BC emissions in six regions that represent about two‐thirds of present day emissions and extrapolate these to global emissions from 1875 onward. Qualitative features in these trends show rapid increase in the latter part of the 1800s, the leveling off in the first half of the 1900s, and the re‐acceleration in the past 50 years as China and India developed. We find that historical changes of fuel utilization have caused large temporal change in aerosol absorption, and thus substantial change of aerosol single scatter albedo in some regions, which suggests that BC may have contributed to global temperature changes in the past century. This implies that the BC history needs to be represented realistically in climate change assessments.
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