Is that possible to add topography in the idealized model?

[kangwanying1992@gmail_com]

Hi~I know that the idealized-physics compset does not have any surface flux, thus the topography may not work as other realistic models. But to have a realistic topography still helps in maintaining climatology in realistic models, otherwise like what I have done: I interpolate the output from realistic model from sigma surface to pressure surface and change the PS in IC to be 100000 everywhere, and then use this to initialize and force the idealized model. This may lead to problem because an volume of air mass in 300 hpa (Tibaten) will not behave the same as 1000hpa...I noticed that in POP2 namelist, there is "topography_opt" "topography_file" "flat_bottom" and in CAM there is "bnd_topo" which set the topography file. However, the idealized model seems to ignore them anyway. Grateful to any suggestion!Best,Wanying

 

[olson]

Correct, idealized model deliberately ignores the topography.  Codemanipulation is required to turn topography back on in idealized.

 

[kangwanying1992@gmail_com]

Hi Jerry,  Thank you very much for replying. Could you please give me more detail about how to turn topography back? Grateful to any comments! Best,Wanying

 

[olson]

I have not attempted this myself although others on this forum may have.  To start with, though, disable the logic that uses the "ideal_phys" flag to set PHIS = 0.0.  This can be found in the "inidat.F90" file of whichever dycore you are using (eul, fv, or se).  I suspect you also may need to enable logic to access the topo file, probably via the same "ideal_phys" flag.