Odran Sourdeval’s research interests lie in the understanding of cloud processes, aerosol-cloud interactions (aci) and their radiative effects, via the combined use of remote-sensing, modelling and in-situ observations. He is an expert in the development and evaluation of novel satellite retrieval schemes, in particular for model evaluation and aci studies. Notably, he has long contributed to operating a shift from a traditional view on retrieval products (e.g. particle radius and cloud optical depth) to quantities more useful for these studies. All datasets that Odran developed were made publicly available and his work remains closely linked to developments for future spatial missions. His current research focuses on improving observation-based estimates of the effective radiative forcing due to aci for liquid but also ice clouds, by better constraining current uncertainties on key cloud parameters such as the number concentration in cloud particles.