The Atmospheric System Research Program (ASR) in the Climate and Environmental Sciences Division (CESD), Office of Biological and Environmental Research (BER) of the Office of Science (SC), U.S. Department of Energy (DOE), supports research on key cloud, aerosol, precipitation, and radiative transfer processes that has the potential to improve the accuracy of regional and global climate models. The ASR program hereby announces its interest in research grant applications to develop new proof-of-concept data products from ARM site instruments, such that new data products represent novel and improved information involving geophysical variables that in turn are utilized by regional and global climate models. Of most interest are improved data products for those geophysical quantities that currently exhibit large errors or uncertainties and/or have been limiting the predictability of climate models.