The evolution of the global aerosol system in a transient climate simulation from 1860 to 2100

Article, Other literature type English OPEN
Stier , P. ; Feichter , J. ; Roeckner , E. ; Kloster , S. ; Esch , M. (2006)
  • Publisher: European Geosciences Union
  • Journal: (issn: 1680-7324, eissn: 1680-7324)
  • Related identifiers: doi: 10.5194/acp-6-3059-2006
  • Subject: [ SDU.OCEAN ] Sciences of the Universe [physics]/Ocean, Atmosphere | Caltech Library Services
    mesheuropmc: respiratory system

The evolution of the global aerosol system from 1860 to 2100 is investigated through a transient atmosphere-ocean General Circulation Model climate simulation with interactively coupled atmospheric aerosol and oceanic biogeochemistry modules. The microphysical aerosol module HAM incorporates the major global aerosol cycles with prognostic treatment of their composition, size distribution, and mixing state. Based on an SRES A1B emission scenario, the global mean sulfate burden is projected to peak in 2020 while black carbon and particulate organic matter show a lagged peak around 2070. From present day to future conditions the anthropogenic aerosol burden shifts generally from the northern high-latitudes to the developing low-latitude source regions with impacts on regional climate. Atmospheric residence- and aging-times show significant alterations under varying climatic and pollution conditions. Concurrently, the aerosol mixing state changes with an increasing aerosol mass fraction residing in the internally mixed accumulation mode. The associated increase in black carbon causes a more than threefold increase of its co-single scattering albedo from 1860 to 2100. Mid-visible aerosol optical depth increases from pre-industrial times, predominantly from the aerosol fine fraction, peaks at 0.26 around the sulfate peak in 2020 and maintains a high level thereafter, due to the continuing increase in carbonaceous aerosols. The global mean anthropogenic top of the atmosphere clear-sky short-wave direct aerosol radiative perturbation intensifies to &minus;1.1 W m<sup>&minus;2</sup> around 2020 and weakens after 2050 to &minus;0.6 W m<sup>&minus;2</sup>, owing to an increase in atmospheric absorption. The demonstrated modifications in the aerosol residence- and aging-times, the microphysical state, and radiative properties challenge simplistic approaches to estimate the aerosol radiative effects from emission projections.
  • References (86)
    86 references, page 1 of 9

    Adams, P. J., Seinfeld, J. H., and Koch, D. M.: Global concentrations of tropospheric sulfate, nitrate, and ammonium aerosol simulated in a general circulation model, J. Geophys. Res., 104, 13 791-13 824, 1999.

    Albrecht, B. A.: Aerosols, cloud microphysics, and fractional cloudiness, Science, 245, 1227-1230, 1989.

    Andreae, M. O.: Global biomass burning: Atmosphere, climatic, and biospheric implications, chap. Biomass burning: Its history, use and distribution, and its impact on environmental quality in global climate, 15-42, MIT Press, Cambridge, MA, 1991.

    A˚ngstro¨m, A.: Atmospheric turbidity, global illumination and planetary albedo of the earth, Tellus, 14, 435-450, 1962.

    Barth, M. C. and Church, A. T.: Regional and global distributions and lifetimes of sulfate aerosols from Mexico City and southeast China, J. Geophys. Res., 104, 30 231-30 240, doi:10.1029/1999JD900 809, 1999.

    Christopher, S. A. and Zhang, J.: Cloud-free shortwave aerosol radiative effect over oceans: Strategies for identifying anthropogenic forcing from Terra satellite measurements, Geophys. Res. Lett., 31, L18 101, doi:10.1029/2004GL020 510, 2004.

    Cooke, W. F., Koffi, B., and Gregoire, J.-M.: Seasonality of vegetation fires in Africa from remote sensing data and application to a global chemistry model, J. Geophys. Res., 101, 21 051-21 065, 1996.

    Cooke, W. F., Liousse, C., Cachier, H., and Feichter, J.: Construction of a 1◦×1◦ fossil fuel emission data set for carbonaceous aerosol and implementation and radiative impact in the ECHAM4 model, J. Geophys. Res., 104, 22 137-22 162, 1999.

    Dentener, F., Kinne, S., Bond, T., Boucher, O., Cofala, J., Generoso, S., Ginoux, P., Gong, S., Hoelzemann, J. J., Ito, A., Marelli, L., Penner, J. E., Putaud, J.-P., Textor, C., Schulz, M., van der Werf, G. R., and Wilson, J.: Emissions of primary aerosol and precursor gases in the years 2000 and 1750, prescribed data-sets for AeroCom, Atmos. Chem. Phys. Discuss., 6, 2703-2763, 2006,

    Feichter, J., Kjellstro¨m, E., Rodhe, H., Dentener, F., Lelieveld, J., and Roelofs, G.-J.: Simulation of the tropospheric sulfur cycle in a global climate model, Atmos. Environ., 30, 1693-1707, 1996.

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