Determination of fine particulate matter from MERIS and SeaWiFS aerosol data

摘要

1 ABSTRACTrnOver land, the Dense Dark Vegetation is used to derive in a first stage the aerosol path radiance and in a second stage tornpropose an aerosol product which consists of the aerosol optical thickness at 443 nm. Air quality monitoring of thernparticles is based on measurements of PM10 and PM2.5 which are respectively the density of particles of diameter lesserrnthan 10 μm, lesser than 2.5 μm, at the surface. The satellite aerosol product can be converted into PM10 and PM2.5, basedrnon different assumptions: particle density and vertical distribution mainly. This first attempt to monitor PM from spacerncan be validated with in-situ data. Another approach will simply consist in using the in-situ PM measurements torncalibrate the satellite imagery. Within the frame of a European project called EXPER-PF, we generated, over an arearncentred on Lille (50’36° N, 3’08 E, North of France), a data base with the SeaWiFS archive, and the PM data collectedrnby the regional air quality network. The above technique will be applied and validate using this data base. MERIS datarnwill be integrated in 2004. We show here the potential improvements on the aerosol product we can expect from MERIS