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Monday 18 January 2010, 14:15-15:15
Analysis of clouds and cloud-aerosol interactions with satellite data and general circulation models
- 👤 Speaker: Dr Johannes Quaas, Max Planck Institut fur Meteorologie, Germany
- 📅 Date & Time: Monday 18 January 2010, 14:15 - 15:15
- 📍 Venue: Unilever Lecture Theatre, Department of Chemistry
Abstract
Aerosol indirect effects, the influence of anthropogenic aerosols serving as cloud condensation nuclei on cloud properties and subsequently planetary albedo, constitute one of the largest uncertainties among anthropogenic climate forcings. Satellite data are useful to constrain aerosol-cloud interaction parameterizations in general circulation models. On the other hand, models may help to interpret statistical relationships between aerosol and cloud properties found from satellite data analysis. An overview is given of studies using statistical relationships between cloud and radiation properties and aerosol concentration as derived from satellite data to constrain GCM parameterizations of aerosol indirect effects. Conversely, the strongly positive relationship found in satellite data between cloud cover and aerosol optical depth is interpreted using sensitivity studies with a GCM .
Series This talk is part of the Centre for Atmospheric Science seminars, Chemistry Dept. series.
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