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WRF surface energy budget


New member
There have been many good previous posts regarding attempts to close the surface energy budget (SEB) in WRF. For example:

Closing NOAH surface heat budget | WRF & MPAS-A Support Forum (

WRF surface energy budget (ALBEDO and EMISS) | WRF & MPAS-A Support Forum (

Confusing names for variables in wrfout | WRF & MPAS-A Support Forum (

However, I am still confused a little about use of SWDOWN in SEB calculations. In model runs with nests that use the slope_rad option and output SWNORM, should it be SWNORM rather than SWDOWN that is used in the SEB calculations? Rather than SWDOWN * (1-ALBEDO) should we have instead use SWNORM * (1-ALBEDO) for example? Is this an incorrect way to think of this? In a variable such as SWDNB would the slope effect be included? Just curious. Thank you-
For surface energy budgets, the land area is defined by the horizontal dx area, even if it is sloped, so SWDOWN is correct.