CCSM4 Special Collection
This collection consists of papers analyzing results from the recently completed and released Community Climate System Model, version 4; see http://www.cesm.ucar.edu/models/ccsm4.0/. The coupled simulations range from runs of past paleoclimates, a long preindustrial control forced by 1850 conditions, an ensemble of 20th century runs, and four ensembles of the future climate using different Representative Concentration Pathways.
CESM1 Special Collection
The second part of this collection has papers analyzing results from the recently completed and released Community Earth System Model, version 1; see http://www.cesm.ucar.edu/models/cesm1.0/. The new components that are available which turn it into an Earth System Model are: carbon cycle modules in the land, ocean, and atmosphere components; an interactive chemistry component in the atmosphere; a version of the atmosphere that reaches into the upper stratosphere, called WACCM; and a completely new land ice component. In addition, an updated version of the atmosphere component, CAM5, is available, which uses several new parameterizations, and can simulate the indirect effects of aerosols.
The overview article for these collections can be found here.