Observations of Marine Stratocumulus Clouds at the Azores during the ARM Mobile Facility Deployment
The ARM Mobile Facility (AMF) deployment in the Azores is distinctly unique compared to previous intensive field campaigns that focused on marine stratocumulus clouds. First, the AMF instrumentation is far more comprehensive and superior to that available in previous field studies. Second, the campaign is 21 month long (April 2009 – December 2010) and thus provides the opportunity to generate the long data set record required to sample a variety of aerosol, cloud and large-scale environmental conditions.
Finally, to our knowledge, it is the first campaign that includes sophisticated cloud radars (profiling and scanning) on a stable (island) platform that enables the use of the Doppler measurements and the utilization of the recorded Doppler spectrum without the usual motion contamination from the ship/aircraft platform. Here, both macroscopic (frequency of occurrence, cloud boundaries, LWP) and microscopic properties (e.g., drizzle onset and growth) of marine stratocumulus clouds are presented using a combination of sensors.