Observational Strategies at Meso- and Large Scales to Reduce Critical Uncertainties in Future Cloud Changes

The response of clouds to climate change remains very uncertain. This is attributable to both an incomplete knowledge of cloud physics and to the difficulties that large-scale models have in simulating the different properties of clouds. An observational strategy is proposed to improve the representation of clouds in large-scale models and to reduce uncertainties in the future change of cloud properties. This consists of determining first what key aspects of the simulation of clouds are the most critical, with respect to future climate changes, and then of using specific methodologies and new datasets to improve the simulation of these aspects in large-scale models