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Proceedings Paper

Satellite estimated cloud radiative forcing in the presence of aerosol events over the south of Portugal
Author(s): Dina Santos; Maria João T. Costa; Daniele Bortoli; Ana Maria Silva
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Paper Abstract

The present work aims to investigate the effects of Saharan desert dust storms on cloud properties and respective radiative forcing over the South of Portugal and nearby Atlantic Ocean, for a case study that occurred between 26 and 29 May 2006, using the MODerate Resolution Imaging Spectroradiometer (MODIS) satellite data. The determination of cloud properties in different regions subject to the presence of dust aerosols provides information on the possible alterations that these clouds may suffer due to the presence of an aerosol layer. Cloud effective radius, optical depth and water path retrieved values are considerably smaller for clouds developing in a dusty atmosphere than for clouds in a dust-free atmosphere. Due to these changes it was also possible to observe that the instantaneous cloud radiative forcing (ICRF) values at the top of the atmosphere (TOA) and at the surface are lower when dust aerosols are not present.

Paper Details

Date Published: 30 October 2007
PDF: 11 pages
Proc. SPIE 6745, Remote Sensing of Clouds and the Atmosphere XII, 674522 (30 October 2007); doi: 10.1117/12.737951
Show Author Affiliations
Dina Santos, Univ. de Évora (Portugal)
Maria João T. Costa, Univ. de Évora (Portugal)
Daniele Bortoli, Univ. de Évora (Portugal)
Institute of Atmospheric Sciences and Climate (Italy)
Ana Maria Silva, Univ. de Évora (Portugal)

Published in SPIE Proceedings Vol. 6745:
Remote Sensing of Clouds and the Atmosphere XII
Adolfo Comerón; Richard H. Picard; Klaus Schäfer; James R. Slusser; Aldo Amodeo, Editor(s)

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