Idealized cases: how to check and tune the diurnal cycle?

Anything related to the idealized simulations in WRF.

Idealized cases: how to check and tune the diurnal cycle?

Postby MaxC » Thu Dec 04, 2014 10:11 pm

I have started to run WRF V3.6 as an idealized case based on the seabreeze2d_x example (but without any land).

I would like to generate convection in this 2D case, over a simple ocean, with added heating perturbations. My initial sounding is quite moist and should be very good to enhance convection. But the heating perturbations just dissipate with time, and no convective occurs. So I guess my radiation processes are not right. In the namelist, I have tried ra_lw_physics = 1 and 4 , and ra_sw_physics = 1 and 4 .

First I would like to check if I do have a diurnal cycle and how it is controlled in the code. But I haven't found where it is computed. Could you please give me a hint? How can I tune the shape and magnitude of the diurnal cycle?

Please let me know if you have any ideas that may help me go forward, as I have spent quite a lot of time preparing this simulation already.

Thanks in advance.
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