The NCAR Climate Analysis Section Data Catalog (CAS) contains a variety of atmospheric and oceanic energy budget calculations derived from satellites and Reanalysis products.It maintains a number of observational data sets and analyses from a variety of sources in support of modelling efforts and climate research. The data have been put on common grids (usually T42 or T63 gaussian grids) to facilitate comparisons. CAS has archived daily operational analyses from major meteorological centers, such as the European Centre for Medium-Range Weather Forecasting (ECMWF) and the National Centers for Environmental Prediction (NCEP, formerly the National Meteorological Center), as well as monthly and long-term means and other products which have been derived from these data.