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| Titel |
Sensitivity of aerosol direct radiative forcing to aerosol vertical profile |
| VerfasserIn |
Jung-Ok Choi, Chul Eddy Chung |
| Konferenz |
EGU General Assembly 2014
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 16 (2014) |
| Datensatznummer |
250100653
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| Publikation (Nr.) |
 EGU/EGU2014-16639.pdf |
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| Zusammenfassung |
| Aerosol vertical profile significantly affects the aerosol direct radiative forcing at the TOA
level. The degree to which the aerosol profile impacts the aerosol forcing depends on many
factors such as presence of cloud, surface albedo, and aerosol SSA. Using a radiation model,
we show that for absorbing aerosols (with an SSA of 0.70.8) whether aerosols are above
cloud or below induces at least one order of magnitude larger changes of the aerosol
forcing than how aerosols are vertically distributed in clear skies, above cloud or
below cloud. To see if this finding also holds for the global average aerosol direct
radiative effect, we use realistic AOD distribution by integrating MODIS, MISR and
AERONET observations, SSA from AERONET and cloud data from various satellite
observations. It is found that whether aerosols are above cloud or below controls
about 7080% of the effect of aerosol vertical profile on the global aerosol radiative
effect. |
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