This data set is a LBA study area subset of the Cort J. Willmott and Scott R. Webber 0.5 degree temperature and precipitation data set for South America. The data consists of: Monthly mean air temperature time series (1960-1990) degC: 1. monthly mean air temperatures for 1960-1990 2. cross validation errors associated with timeseries 3. monthly mean air temperatures for 1960-1900, DEM assisted interpolation 4. cross validation errors associated w/ DEM assisted interpolation time series Monthly mean air temperature climatology degC: 1. climatic means of monthly & annual air temperatures 2. cross validation errors associated with climatic means 3. climatic means of monthly & annual mean air temps, DEM assisted interpolation 4. cross validation errors assoc w/ DEM assisted interpolation climatic means Monthly total precipitation time series (1960-1990) mm: 1. monthly precipitation totals for 1960-1990 2. cross validation errors associated with time series 3. monthly precip totals for 1960-1990, climatologically-aided interpolation 4. cross val errors assoc w/ climatologically-aided interpolation time series Monthly total precipitation climatology mm: 1. climatic means of monthly & annual precipitation totals 2. cross validation errors associated with climatic means The original documentation and data may be on the Willmott and Collaborators' Global Climate Resource Pages at the University of Delaware (http://climate.geog.udel.edu/~climate/). Follow the links from Available climate data to South American Climate data. The subsetted data are available for download at ftp://www.daac.ornl.gov/data/lba/physical_climate/willmott/. The data files are in ASCII Grid format for ArcInfo. Additional information on this format is available in the README file along with information regarding the subsetting procedure.