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About

Jean-Louis Roujean is a leading figure in satellite remote sensing of land surface and atmospheric properties, with a career dedicated to advancing our understanding of aerosol–surface interactions. His research focuses on developing innovative algorithms to retrieve aerosol optical thickness (AOT) and land surface albedo from geostationary satellite data, particularly from SEVIRI on MSG and the GK-2A/AMI instrument. Roujean’s major contributions include pioneering the use of temporal and directional analysis to separate atmospheric signals from more stable land surface properties, enabling daily, quality-controlled AOT estimates over continents—a breakthrough cited over 66 times. He has also advanced the estimation of direct aerosol radiative forcing by accounting for diurnal variations and aerosol composition, with key studies in West Africa (Dakar and Niamey) improving solar radiation products for the LSA-SAF. His work on land surface albedo algorithms for next-generation geostationary satellites like GK-2A supports operational climate monitoring. With a cumulative impact exceeding 150 citations, Roujean’s research is essential for climate modeling, air quality assessment, and solar energy applications, making him a respected authority in Earth observation science.