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Midlatitude Continental Convective Clouds Experiment (MC3E)
In the spring of 2011, ESRL's Physical Sciences Division (PSD) participated in the MC3E field experiment, which aimed to sample the complete lifecycle of convective clouds including the build-up, the mature, and the decaying phases. Observations from the experiment will help parameterize precipitation processes in weather models and help improve rainfall estimates using satellite observations.
PSD deployed a 449-MHz wind profiler and a 2.8-GHz precipitation profiler at the DOE Southern Great Plains (SGP) field site near Ponca City, Oklahoma. Both radars are pointed vertically to sample the vertical structure of precipitation that passes overhead. The 449-MHz profiler provided observations of the vertical air motion, and the 2.8-GHz profiler observed the hydrometeor motion – raindrops, hail, and ice particles being lifted and pushed downward by the vertical air motion. By combining these two observations the number and size of raindrops can be estimated in the vertical column which provides information on the microphysical processes occurring in the cloud systems.
In addition to PSD's two profilers, four more frequency radars and nine scanning poarimetric radars were used. Aircraft were also flown over the site, and balloons were launched from 5 locations around the site every 3 hours during rain events.