Evaluating the climate and air quality impacts of short-lived pollutants (38 page pdf, A. Stohl, B. Aamaas, M. Amann, L. H. Baker, N. Bellouin, T. K. Berntsen, O. Boucher, R. Cherian, W. Collins, N. Daskalakis, M. Dusinska, S. Eckhardt, J. S. Fuglestvedt, M. Harju, C. Heyes, Ø. Hodnebrog, J. Hao, U. Im, M. Kanakidou, Z. Klimont, K. Kupiainen, K. S. Law, M. T. Lund, R. Maas, C. R. MacIntosh, G. Myhre, S. Myriokefalitakis, D. Olivié, J. Quaas, B. Quennehen, J.-C. Raut, S. T. Rumbold, B. H. Samset, M. Schulz, Ø. Seland, K. P. Shine, R. B. Skeie, S. Wang, K. E. Yttri, and T. Zhu, Atmos. Chem. Phys., Sep. 24, 2015)
Also discussed here: Curbing short-lived pollutants a win-win for climate and air quality (News, The International Institute for Applied Systems Analysis, Sep. 24, 2015)
Today we review research into the benefits of reducing air pollution in terms of reduced climate warming and on health. The lifetimes of air pollutants such as methane, SO2, NOx and black carbon are measured in months compared CO2 which lasts decades but their radiative impact on climate warming is much greater individually (as opposed to overall), given that their much lower concentration in the atmosphere than CO2. The impact on health of course is much greater with 223,000 deaths from lung cancer each year and shorter lifetimes of 7.5 years globally from air pollution. Short term reductions in air pollution (by 2050) were shown by climate models to reduce warming by 0.22C, while extending lifetimes by up to 11 months (in India).
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