The term "exch_h" represents vertical thermal diffusivity in the MYJ, YSU, QNSE, MYNN, and BouLac schemes. WRF does not output eddy viscosity. It can be extracted from the MYJ PBL in a similar way to exch_h, but would require some coding similar to exch_h in the MYJ module, in addition to a new array. AKMK is a local array in the MYJ PBL that is proportional to the eddy viscosity. XKMV and XKHV arrays are used by other PBL options (not MYJ).
Output vertical eddy viscosity and vertical thermal diffusivity
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