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| Titel |
Global distribution and climate forcing of marine organic aerosol – Part 2: Effects on cloud properties and radiative forcing |
| VerfasserIn |
B. Gantt, J. Xu, N. Meskhidze, Y. Zhang, A. Nenes, S. J. Ghan, X. Liu, R. Easter, R. Zaveri |
| 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 ; 12, no. 14 ; Nr. 12, no. 14 (2012-07-25), S.6555-6563 |
| Datensatznummer |
250011343
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| Publikation (Nr.) |
 copernicus.org/acp-12-6555-2012.pdf |
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| Zusammenfassung |
| A series of simulations with the Community Atmosphere Model version 5 (CAM5)
with a 7-mode Modal Aerosol Model were conducted to assess the changes in
cloud microphysical properties and radiative forcing resulting from marine
organic aerosols. Model simulations show that the anthropogenic aerosol
indirect forcing (AIF) predicted by CAM5 is decreased in absolute magnitude
by up to 0.09 W m−2 (7%) when marine organic aerosols are included.
Changes in the AIF from marine organic aerosols are associated with small
global increases in low-level in-cloud droplet number concentration and
liquid water path of 1.3 cm−3 (1.5%) and 0.22 g m−2 (0.5%),
respectively. Areas especially sensitive to changes in cloud properties due
to marine organic aerosol include the Southern Ocean, North Pacific Ocean,
and North Atlantic Ocean, all of which are characterized by high marine
organic emission rates. As climate models are particularly sensitive to the
background aerosol concentration, this small but non-negligible change in
the AIF due to marine organic aerosols provides a notable link for
ocean-ecosystem marine low-level cloud interactions and may be a candidate
for consideration in future earth system models. |
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