CARE’s Users Committee and Chief Scientist organized a meeting on aerosol-cloud-radiation interactions and water cycle. The meeting took place on 8-9 October 2009 at the University Paris 6. The main objective of the meeting was to present the current status of remote sensing of atmospheric variables and processes followed by round table discussions. Four specific topics were discussed: climatic variables and trends, boundary layer, tropics, and convection in the upper troposphere/lower stratosphere.