### Question on model output on z-levels

Hello,

I have a small question on CCLM model output on z-levels (with namelist parameters yvarzl + zlev):

I wonder whether these z-levels are specified with respect to MSL or with respect to the topography (I suspect these are just flat, so MSL ?).

Follow-up question: If one would desire output at 90m above the surface of a region, then the z-level approach would not be fit for this if these z-levels are with respect to MSL (because of the relief). What would be the best alternative to achieve this then instead? When using the height-based hybrid µ coordinate, I would think that specifying the half level heights in such a way that model output is given at about 90m on a model level, could work.

Already a big thank you in advance!

Best,

Ruben

Dear Burkhardt,

I was not aware of this parameter yet, thanks.

And with this parameter equal to .TRUE., I suppose that over sea the ground is just equal to MSL then?

Best regards,

Ruben

Dear Burkhardt,

I was not aware of this parameter yet, thanks.

And with this parameter equal to .TRUE., I suppose that over sea the ground is just equal to MSL then?

Best regards,

Ruben

Dear Burkhardt,

I was not aware of this parameter yet, thanks.

And with this parameter equal to .TRUE., I suppose that over sea the ground is just equal to MSL then?

Best regards,

Ruben

Hello,

I have a small question on CCLM model output on z-levels (with namelist parameters yvarzl + zlev):

I wonder whether these z-levels are specified with respect to MSL or with respect to the topography (I suspect these are just flat, so MSL ?).

Follow-up question: If one would desire output at 90m above the surface of a region, then the z-level approach would not be fit for this if these z-levels are with respect to MSL (because of the relief). What would be the best alternative to achieve this then instead? When using the height-based hybrid µ coordinate, I would think that specifying the half level heights in such a way that model output is given at about 90m on a model level, could work.

Already a big thank you in advance!

Best,

Ruben