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Abstract

The goal of this exercise is twofold: First, we want to study the desert aerosols, the so-called �dust�, in terms of source, repartition, quantity and seasonability over the Mediterranean Sea in order to build a dust climatology. Second, we want to use this knowledge to make dust deposition models run and evaluate the impact of the dust particles on the biogeochemical cycle in the Mediterranean Sea.

This report presents the first part of the work. For that purpose, we used the REMBRANDT (REtrieval of Marine Biological Resources through ANalysis of ocean color DaTa) software as a processing for the SeaWiFS data over the Mediterranean Sea. As this scheme is dedicated to the ocean colour products derivation, dust aerosol zones are commonly flagged through the processing to avoid bad atmospheric corrections. Removing these flags required the development of a parallel process in the REMBRANDT code. The satellite-derived atmospheric signal for any sea pixel at any wavelength is used to define two optical parameters, which are fully described in the report. Series of empirical criteria were applied using these parameters so as to discriminate dust from other aerosols and cirrus. We processed about 140 SeaWiFS images over the Mediterranean Sea from 1998 to 2001 applying those criteria. The results were validated through a match-up analysis with SeaWiFS true-colour browse images. In a second part of the report, we present the preliminary results dealing with the dust climatology. The SeaWiFS dust archive over the Mediterranean Sea extends between 1998 and 2001.

Additional information

Authors: MARTINY N, European Commission, Joint Research Centre, Institute for Environment and Sustainability, Inland and Marine Waters Unit, Ispra (IT);HOEPFFNER N, European Commission, Joint Research Centre, Institute for Environment and Sustainability, Inland and Marine Waters Unit, Ispra (IT)
Bibliographic Reference: EUR 20663 EN (2003), 32pp. Free of charge
Availability: Available from European Commission, JRC Knowledge Management Unit, Ispra (IT) Tel: +39 033278 9843 or +39 033278 9864 Fax: +39 033278 9623 E-mail: jrc-publications-office@ec.europa.eu
Record Number: 200316191 / Last updated on: 2003-04-29
Category: PUBLICATION
Original language: en
Available languages: en
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