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Séminaire de Michael Twardoswki

Vendredi 16 juin 2017 à 11h

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Séminaire de Michael Twardoswki (USA Florida Atlantic University) intitulé :

Analytically deriving suspended particulate matter from optical properties

Date : vendredi 16 juin 2017 à 11h

Lieu : salle de conférences à la MREN (Wimereux)

Résumé :
With recent advances in instrumentation measuring the scattering properties of suspended particles in naturel waters, renewed emphasis has been directed toward the utility of using scattering to glean information about the composition of oceanic particles. Rigorous inversion models are needed that can be used to quantitatively interpret scattering measurements in terms of particle biogeochemical properties. At the present time, models relating suspended particulate matter (SPM) to optical properties such as particulate attenuation and backscattering have largely been empirical in nature and dependant on the composition of the particle population. Such models may perform well regionally and/or temporally, but their applicability is constrained. Progress will be presented developing an analytical model that uses particulate attenuation and backscattering readily resolved with off-the-self technology as input to quantitatively derive SPM. Since these measurements can be made from autonomous platforms, there is the potential with this model to dramatically increase spatial and temporal resolving capabilities for SPM in the world’s oceans. Also, with algorithms to derive backscattering and attenuation from remotely sensed signals, such a model is the key to improving the accuracy of SPM concentrations derived remotely in the future. The model is evaluated using several data sets collected throughout the world’s oceans, inclusing 6 data sets collected by LOG.