Atmospheric Radiation Measurement Project

Project Description
The Atmospheric Radiation Measurement Program is the largest global
change research program supported by the U.S. Department of Energy
(DOE). ARM scientists focus on obtaining field measurements and
developing models to better understand the processes that control
solar and thermal infrared radiative transfer in the atmosphere
(especially in clouds) and at the earth's surface.

For more information, link to http://www.arm.gov/