Longwave radiation calculations of absorptivities and emissivities for various gases are referenced latitude band by latitude band, and can be held in-core at all times or cycled to an out-of-core work unit. In the default configuration, the absorptivities and emissivities are computed and written out every 12 simulated hours and read in as input every hour. Nonadjacent layer absorptivities, nearest-layer absorptivities, and total emissivity arrays are stacked in array absems in order to minimize the number of I/O calls in the out-of-core configuration.
It is recommend that the user choose a primary history file write frequency (namelist variable
NHTFRQ(1)
) that is an even multiple of the longwave radiation calculation frequency(
IRADAE
). Otherwise, the large absorptivity/emissivity arrays must be written to the restart dataset.
Questions on these pages can be sent to... erik@ucar.edu .
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