General Recommendations and Conclusions

Understanding how clouds respond to a changing climate requires carefully designed micro- and mesoscale observational experiments. The task of separating the impacts of variability in large-scale meteorology from those caused by changes in aerosol physical and chemical properties is very challenging. This is because cloud and precipitation formation is sensitive to both changes in the large-scale forcings as well as to microphysical aerosol-induced impacts. Moreover, not only the instantaneous relationships between microphysical and macrophysical variables, but also the temporal evolution of the fields must be documented. Thus, it is important to put the observed microphysical changes in perspective with the effects of the large-scale meteorological variability.

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