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Title: Modeling Saharan desert dust radiative effects on clouds
Authors: Santos, Dina
Costa, Maria João
Silva, Ana Maria
Salgado, Rui
Editors: Reis, António Heitor
Silva, Ana Maria
Bortoli, Daniele
Carneiro, Júlio
Costa, Maria João
Bezzeghoud, Mourad
Salgado, Rui
Keywords: Atmospheric modeling
radiative effects
Issue Date: Jul-2011
Publisher: Global Conference on Global Warming - GCGW2011
Abstract: This work intends to study the Saharan desert dust storms effects on clouds. This is done through the estimation of the cloud radiative forcing in the presence of mineral desert dust aerosols during a strong desert dust event that occured in the end of May 2006. The assessment of the cloud radiative forcing is made at a regional scale both at the top of the atmosphere (TOA) and at the surface levels. The results are obtained from numerical simulations with a mesoscale atmospheric model (MesoNH) over Portugal area and nearby Atlantic Ocean. From the results obtained it is possible to observe that, for all days under study, a cooling effect is always found both at the TOA and surface levels. Also, for these two levels and for clouds developing in a dusty atmosphere, a more pronounced cooling effect (more negative cloud radiative forcing values) is found compared with the corresponding cloud radiative forcing values for clouds developing in a dust free atmosphere.
ISBN: 978-989-95091-3-9
Type: article
Appears in Collections:FIS - Artigos em Livros de Actas/Proceedings
CGE - Artigos em Livros de Actas/Proceedings

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