CLAAS-2. CLIMATE APPLICATIONS: Study of small, regional, and large scale cloud processes regional climate monitoring and modelling Climate research, NMHSs, government agencies WCRP ACPC initiative, FP7 EURO-4M, WMO climate services. OFFICIAL CITATION: Stengel et al. 2014: http://dx.doi.org/10.5194/acp-14-4297-