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| Titel |
A review of natural aerosol interactions and feedbacks within the Earth system |
| VerfasserIn |
K. S. Carslaw, O. Boucher, D. V. Spracklen, G. W. Mann, J. G. L. Rae, S. Woodward, M. Kulmala  |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7316
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 10, no. 4 ; Nr. 10, no. 4 (2010-02-15), S.1701-1737 |
| Datensatznummer |
250008112
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| Publikation (Nr.) |
 copernicus.org/acp-10-1701-2010.pdf |
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| Zusammenfassung |
| The natural environment is a major source of atmospheric aerosols, including dust, secondary
organic material from terrestrial biogenic emissions, carbonaceous particles from wildfires,
and sulphate from marine phytoplankton dimethyl sulphide emissions. These aerosols also have
a significant effect on many components of the Earth system such as the atmospheric
radiative balance and photosynthetically available radiation entering the biosphere, the
supply of nutrients to the ocean, and the albedo of snow and ice. The physical and
biological systems that produce these aerosols can be highly susceptible to modification due
to climate change so there is the potential for important climate feedbacks. We review the
impact of these natural systems on atmospheric aerosol based on observations and models,
including the potential for long term changes in emissions and the feedbacks on climate. The
number of drivers of change is very large and the various systems are strongly
coupled. There have therefore been very few studies that integrate the various effects to
estimate climate feedback factors. Nevertheless, available observations and model studies
suggest that the regional radiative perturbations are potentially several Watts per square metre
due to changes in these natural aerosol emissions in a future climate. Taking into account only
the direct radiative effect of changes in the atmospheric burden of natural aerosols, and neglecting
potentially large effects on other parts of the Earth system, a global mean radiative perturbation
approaching 1 W m−2 is possible by the end of the century. The level of
scientific understanding of the climate drivers, interactions and impacts is very low. |
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