Winter snowfall in the Boston area is not uncommon, and in February they got it in spadesjust in time for the second phase of research flights for the Two-Column Aerosol Project at Cape Cod, Massachusetts. Despite a few snow days the ARM Aerial Facility (AAF) team completed a very full and successful schedule of research [...]

Research published today in the journal <em><a href="http://www.nature.com/">Nature</a></em> shows that low-level clouds in Greenland that contain just the right amount of water are thick enough to block heat from escaping to space, but thin enough to allow sunlight to reach the surface. This cloud cocktail leads to enhanced warming near the surface. Measurements from ARM instruments at Summit Station are helping researchers study important climate processes in the Arctic.