The CCSM3 atmosphere and land models share the identical horizontal grid. T85 is a 256 by 128 regular longitude/latitude global horizontal grid (approximately 1.4 degree resolution). T85 indicates the truncation level in spectral space. The T42 is a similar grid by has 128 by 64 horizontal grids cells (approximately 2.8 degree resolution) The T31 is a similar grid by has 96 by 48 horizontal grids cells (approximately 3.
The CCSM2 atmosphere and land models share the identical horizontal grid. T42 is a 128 by 64 regular longitude/latitude global horizontal grid (approximately 2.8 degree resolution). T42 indicates the truncation level in spectral space. The T31 is a similar grid by has 96 by 48 horizontal grids cells (approximately 3.75 degree resolution).