Seminar

Biography
Professor at Université du Littoral Côte d'Opale (France), his researches deal with the interaction between light and matter in the ocean. He leads theoretical and experimental studies aiming at understanding, using satellite observations, the marine carbon cycle and its temporal variations in the coastal and open waters at global scale. After a PhD in 1999 at University Pierre et Marie Curie (France in marine optics, he spent 2 years at the Scripps Institution of Oceanography (USA). After working on the definition of the bio-optical algorithms for the POLDER-2 mission (CNES), he has built the remote sensing team at the Laboratory of Oceanography and Geosciences in France. He was member between 2003 to 2014 of the ocean group of the French space agency (CNES) scientific committee. He is now member of the International Ocean Color Coordinating Group (IOCCG). He has been involved in many international working groups (CNES, NASA, and ESA) on ocean color. He is working in Vietnam since 2012 to develop researches in spatial oceanography. He is now leading few projects on the evolution of coastal waters at global scale.

Abstract
Satellite remote sensing now allows for the collection of various physical and biological parameters at regional and global scales and at different temporal resolutions which are not accessible to other sampling methods. The first objective of the GlobCoast project (www.foresea.fr/globcoast/) is to assess and analyze the seasonal, inter-annual, and decadal evolution of the global coastal waters in terms of biogeochemical composition as revealed from satellite ocean colour observations. Here, we present the temporal variability (seasonal and long term trend) patterns of the suspended particulate matter, SPM, over the global coastal ocean over the last decade. For that purpose, a new global SPM algorithm combined with a new atmospheric correction algorithm, have been developed, evaluated, and applied to the MERIS (2002-2012) archive. Then, based on the use of statistical methods the temporal variability schemes of SPM are presented at global scale. The impact of natural and human factors on this variability are discussed on some given areas.