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Abstract

One key problem in aerosol retrieval over land is to distinguish between surface and atmospheric contributions to the satellite signal. In principle a method similar to the classical Dense Dark Vegetation could be used over brighter surfaces if the surface BRDF could be described with sufficient accuracy. Studying a time series of data, taking into account geometrical conditions, and assuming the ground BRDF to be constant over several days, a coupled surface/atmosphere model was used to investigate the retrieval of aerosol optical thickness over several sites. By fitting a subset of satellite observations associated with ground photometer data, a best fit of BRDF parameters could be determined. Using then this surface characterisation as an input of the inversion process, the aerosol optical thickness can in principle be retrieved routinely. This method has been explored with time series of data from both the VEGETATION and SeaWifS sensors, over several European sites. The aerosol optimal thickness retrieved from the satellite data and ground measurements were in good agreement, even for cases of high optical depth.

Conference website is at: http://www.gsf.de/eurotrac/symp2002/ /

Additional information

Authors: BORDE R, European Commission, Joint Research Centre, Institute for Environment and Sustainability, Ispra (IT);VERDEBOUT J, European Commission, Joint Research Centre, Institute for Environment and Sustainability, Ispra (IT)
Bibliographic Reference: An oral report given at: EUROTRAC-2 Symposium 2002. Organised by: EUROTRAC International Scientific Secretariat (ISS) (DE). Held in: Garmisch-Partenkirchen, 11-13 March 2002.
Record Number: 200214379 / Last updated on: 2002-02-15
Category: PUBLICATION
Original language: en
Available languages: en