geo_em_d0* var_sso all zeros for polar projection

[andythewxman]

Good morning. I am trying to run a 4km polar projection. When I dump the var_sso variable from my geo_em_d01 and geo_em_d02 files, I notice that it contains all zeros. However, when I try a different projection (lambert, mercator) there are a lot of non-zero values for var_sso. The missing values associated with the polar projection is causing a WRF 4.5.2 error because the log says that when topo_wind = 1 then var_sso data is required. Should I be seeing non-zero var_sso data for a polar projection, or is this to be expected?

 

[Ming Chen]

Hi,

VARSSO is available between 60S-60N. Beyond this region no data is available. For polar projection, please avoid using topo_wind = 1.

 

[andythewxman]

Thank you for your reply. Is there something new in WRF V4.5 that checks for this? When running V3.8 the model would still run as expected with missing VAR_SSO data and topo wind turned on. However, it WRF immediately fails when the VAR_SSO array is all zeroes in V4.5.

 

[Ming Chen]

There are many changes between V3.8 and V4.5. It is hard to tell what changes affect VARSSO and topo_wind.

What is the error message you have seen ?