Will black carbon mitigation dampen aerosol indirect forcing?
| Autor: | Chen, W.‐T., Lee, Y. H., Adams, P. J., Nenes, A., Seinfeld, J. H. |
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| Předmět: |
Carbonaceous source
Climate simulation Fossil fuels aerosol atmospheric forcing Global clouds black carbon Fossil fuel combustion cloud radiative forcing Biomass-burning emission Particle number emission Radiative forcings Particulate Matter Particulate emissions cloud condensation nucleus fossil fuel Particles (particulate matter) |
| Popis: | If mitigation of black carbon (BC) particulate matter is accompanied by a decrease in particle number emissions, and thereby by a decrease in global cloud condensation nuclei (CCN) concentrations, a decrease in global cloud radiative forcing (a reverse-gcloud albedo effect-h) results. We consider two present-day mitigation scenarios: 50% reduction of primary black carbon/organic carbon (BC/OC) mass and number emissions from fossil fuel combustion (termed HF), and 50% reduction of primary BC/OC mass and number emissions from all primary carbonaceous sources (fossil fuel, domestic biofuel, and biomass burning) (termed HC). Radiative forcing effects of these scenarios are assessed through present-day equilibrium climate simulations. Global average top-of-the- atmosphere changes in radiative forcing for the two scenarios, relative to present day conditions, are +0.13-2 0.33 W m.2 (HF) and + 0.31 ±0.33 W m.-2 (HC). Copyright © 2010 by the American Geophysical Union. |
| Databáze: | OpenAIRE |
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