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| Titel |
Particulate absorption of solar radiation: anthropogenic aerosols vs. dust |
| VerfasserIn |
C. Wang, G. R. Jeong, N. Mahowald |
| 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 ; 9, no. 12 ; Nr. 9, no. 12 (2009-06-17), S.3935-3945 |
| Datensatznummer |
250007427
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| Publikation (Nr.) |
 copernicus.org/acp-9-3935-2009.pdf |
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| Zusammenfassung |
| Particulate solar absorption is a critical factor in determining the value
and even sign of the direct radiative forcing of aerosols. The heating to
the atmosphere and cooling to the Earth's surface caused by this absorption
are hypothesized to have significant climate impacts. We find that
anthropogenic aerosols play an important role around the globe in total
particulate absorption of solar radiation. The global-average anthropogenic
fraction in total aerosol absorbing optical depth exceeds 65% in all
seasons. Combining the potentially highest dust absorption with the lowest
anthropogenic absorption within our model range, this fraction would still
exceed 47% in most seasons except for boreal spring (36%) when dust
abundance reaches its peak. Nevertheless, dust aerosol is still a critical
absorbing constituent over places including North Africa, the entire
tropical Atlantic, and during boreal spring in most part of Eurasian
continent. The equality in absorbing solar radiation of dust and
anthropogenic aerosols appears to be particularly important over Indian
subcontinent and nearby regions as well as North Africa. |
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