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| Titel |
New Observational and Modeling Approaches for Understanding Radiative Effects in Polluted Boundary Layer Clouds |
| VerfasserIn |
K. Sebastian Schmidt, Shi Song, Peter Pilewskie, Odele Coddington |
| 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 |
250095178
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| Publikation (Nr.) |
 EGU/EGU2014-10625.pdf |
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| Zusammenfassung |
| Ubiquitous broken boundary layer clouds that are are embedded in absorbing aerosol layers
remain a primary challenge for passive imagers that are currently in space, most importantly
because three-dimensional (3D) radiative cloud effects lead to spectrally-dependent
perturbations in the ‘clear-sky’ regions that are comparable in magnitude to the aerosol
radiative effects. We apply recently developed parameterizations of net horizontal photon
transport in broken cloud fields to this problem and show how they can help to retrieve
aerosol radiative properties in presence of inhomogeneous cloud fields. We then use data
from the recent NASA SEAC4RS (Studies of Emissions, Atmospheric Composition,
Clouds and Climate Coupling by Regional Surveys) field campaign (Houston, Texas,
August/September 2013) to examine the combined radiative effects of aerosols and clouds
from the vantage point of airborne and satellite observations, and reconcile our new remote
sensing approach, which is largely based on idealized clouds, three-dimensional
radiative transfer calculations, and parameterizations, with real-world clouds. We will
then discuss how much detail is required to derive the radiative effects such as
forcing of cloud-aerosol fields with future airborne and spaceborne spectral imagers. |
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