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Improved estimation of aerosol optical depth from MODIS imagery over land surfaces / B. Zhong in Remote sensing of environment, vol 104 n° 4 (30/10/2006)  

Public [article]  inRemote sensing of environment > vol 104 n° 4 (30/10/2006) . - pp 416 - 425 Titre : Improved estimation of aerosol optical depth from MODIS imagery over land surfaces Type de document : Article/Communication Auteurs : B. Zhong, Auteur ; Shunlin Liang, Auteur ; H. Fang, Auteur Année de publication : 2006 Article en page(s) : pp 416 - 425 Langues : Anglais (eng) Descripteur : [Vedettes matières IGN] Applications de télédétection [Termes IGN] aérosol [Termes IGN] changement climatique [Termes IGN] épaisseur optique [Termes IGN] image Terra-MODIS [Termes IGN] luminance lumineuse [Termes IGN] occupation du sol [Termes IGN] végétation Résumé : (Auteur) Estimation of aerosol loadings is of great importance to the studies on global climate changes. The current Moderate-Resolution Imaging Spectroradiometer (MODIS) aerosol estimation algorithm over land is based on the “dark-object” approach, which works only over densely vegetated (“dark”) surfaces. In this study, we develop a new aerosol estimation algorithm that uses the temporal signatures from a sequence of MODIS imagery over land surfaces, particularly “bright” surfaces. The estimated aerosol optical depth is validated by Aerosol Robotic Network (AERONET) measurements. Case studies indicate that this algorithm can retrieve aerosol optical depths reasonably well from the winter MODIS imagery at seven sites: four sites in the greater Washington, DC area, USA; Beijing City, China; Banizoumbou, Niger, Africa; and Bratts Lake, Canada. The MODIS aerosol estimation algorithm over land (MOD04), however, does not perform well over these non-vegetated surfaces. This new algorithm has the potential to be used for other satellite images that have similar temporal resolutions. Copyright Elsevier Numéro de notice : A2006-494 Affiliation des auteurs : non IGN Thématique : IMAGERIE Nature : Article nature-HAL : ArtAvecCL-RevueIntern DOI : 10.1016/j.rse.2006.05.016 En ligne : https://doi.org/10.1016/j.rse.2006.05.016 Format de la ressource électronique : URL article Permalink : https://documentation.ensg.eu/index.php?lvl=notice_display&id=28218 [article]