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Télédétection des aérosols au-dessus des terres émergées à l'aide des capteurs « couleur de l'eau » et applications.

Abstract : This work is organized on the application of the aerosol remote sensing over land algorithm developed for the ENVISAT/MERIS sensor on a large database of SeaSTAR/SeaWiFS sensor. The aerosol remote sensing over land is based on the DDV (Dense Dark Vegetation) detection selected with the ARVI thanks to the darkness of the DDV in the blue and the red. The critical point of the algorithm is the weak coverage of the aerosol product (around 2% of the land). To fix this coverage problem, the DDV concept has been extended to brighter surfaces called LARS (Land Aerosol Remote Sensing). The LARS reflectance is modelized thanks to the linearity between the surface reflectance and the ARVI. A statistical study based on the aerosol spatial homogeneity over small SeaWiFS subscenes allows confirming the new model established by HYGEOS on MERIS data. The comparison of the SeaWiFS aerosol product with AERONET data shows a good retrieval of the aerosol optical thickness in the blue and an overestimation of the aerosol optical thickness in the red. Now, we have an operational aerosol product with SeaWiFS. In the frame of two European projects, we applied the aerosol remote sensing over land algorithm. The EXPER/PF project relies on air quality and the possibility of the conversion of the aerosol optical thickness into PM with the help of a large database on particles and auxiliary data. The SISCAL project relies on the “water color” and the application of the aerosol remote sensing over land for an innovative approach of the atmospheric correction over inland waters.
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https://tel.archives-ouvertes.fr/tel-00011216
Contributor : Jerome Vidot <>
Submitted on : Thursday, December 15, 2005 - 6:23:37 PM
Last modification on : Tuesday, January 5, 2021 - 3:02:03 PM
Long-term archiving on: : Saturday, April 3, 2010 - 6:49:53 PM

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  • HAL Id : tel-00011216, version 1

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Jerome Vidot. Télédétection des aérosols au-dessus des terres émergées à l'aide des capteurs « couleur de l'eau » et applications.. Océan, Atmosphère. Université du Littoral Côte d'Opale, 2005. Français. ⟨tel-00011216⟩

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