06/19/2026
More than two years after ARM’s Eastern Pacific Cloud Aerosol Precipitation Experiment (EPCAPE) wrapped up operations in La Jolla, California, scientists are uncovering new insights into how aerosols and coastal marine clouds interact. The yearlong campaign produced an unprecedented data set from ARM and guest instruments, capturing cloud behavior across times of days, seasons, and elevations. EPCAPE data are supporting efforts to evaluate and improve earth system models while fueling a growing body of research on cloud physics, chemistry, and atmospheric processes. ☁️🌅🌎
📷: ARM instruments and containers are arrayed along the Ellen Browning Scripps Memorial Pier in La Jolla, California, as part of EPCAPE. Photo is by Gregory Roberts, Scripps Institution of Oceanography.