PCRM Description
The Parallel Column Radiation Model is a slightly modified version of the column radiation model used in version 3.6.6 of the CCM. It also represents an important computational kernel in atmospheric models. It differs significantly from PSTSWM in that over 6% of the floating-point operations are divide or square root, and it exhibits much better operand reuse. Therefore is makes vastly different demands on the processor and compiler.
The data structures used by PCRM are of the form longitude x vertical x latitude. The experiment uses a fixed problem size of 512 columns, each with 18 vertical levels. The lengths of the longitude and latitude dimensions are varied, keeping their product fixed at 512.