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| Titel |
Contrasting the direct radiative effect and direct radiative forcing of aerosols |
| VerfasserIn |
C. L. Heald, D. A. Ridley, J. H. Kroll, S. R. H. Barrett, K. E. Cady-Pereira, M. J. Alvarado, C. D. Holmes |
| 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 ; 14, no. 11 ; Nr. 14, no. 11 (2014-06-04), S.5513-5527 |
| Datensatznummer |
250118771
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| Publikation (Nr.) |
 copernicus.org/acp-14-5513-2014.pdf |
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| Zusammenfassung |
| The direct radiative effect (DRE) of aerosols, which is the instantaneous
radiative impact of all atmospheric particles on the Earth's energy balance,
is sometimes confused with the direct radiative forcing (DRF), which is the
change in DRE from pre-industrial to present-day (not including climate
feedbacks). In this study we couple a global chemical transport model
(GEOS-Chem) with a radiative transfer model (RRTMG) to contrast these
concepts. We estimate a global mean all-sky aerosol DRF of −0.36 Wm−2
and a DRE of −1.83 Wm−2 for 2010. Therefore, natural sources of aerosol
(here including fire) affect the global energy balance over four times more
than do present-day anthropogenic aerosols. If global anthropogenic
emissions of aerosols and their precursors continue to decline as projected
in recent scenarios due to effective pollution emission controls, the DRF
will shrink (−0.22 Wm−2 for 2100). Secondary metrics, like DRE, that
quantify temporal changes in both natural and anthropogenic aerosol burdens
are therefore needed to quantify the total effect of aerosols on climate. |
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