WRF Time step value in case of lat-lon projection?

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rabbanidu93

Member
What should be the time step value in case of using lat-lon projection in wps? Usually we use 6*dx or less if the dx in km. But now dx is in degree (i.e. 0.2x0.2). 6*0.2 becomes 1.2 sec now. It takes so long to complete the simulation. Please help.
 
Even if you run with lat-lon projection, you can still get grid intervals in km, and I believe you need to specify DX (and DY) in km in namelist.input. Then you can follow the normal formula to obtain time step. I don't think you should set DX = 0.2 (degree) in your namelist.input.
 
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