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Vertical coordinate namelist variables formulae.

PostPosted: Wed Jul 04, 2018 10:53 am
by Nast
Greetings,
I would like to know the exact vertical coordinate namelist variables formulae. I have read the WRF4 User's Guide and the WRF3.9 Technical Notes, but I couldn't find out the equation relationship between namelist variables e_vert, max_dz, dzbot, dzstretch_s, dzstretch_u and p_top_requested.

Thank you,
Nast.

Re: Vertical coordinate namelist variables formulae.

PostPosted: Tue Jul 10, 2018 4:35 am
by Nast
Hello everyone,
finally, I could understand the variables e_vert, max_dz, dzbot and p_top_requested.
However, after reading README.namelist file, it is not clear what dzstretch_u and dzstretch_s are.
It says "The new method has surface and upper stretching factors (dz_stretch_s and dz_stretch_u) to stretch levels according to log p up to where it reaches the maximum thickness (max_dz) and starting from thickness dzbot. The stretching transitions from dzstretch_s to dzstretch_u by the time the thickness reaches max_dz/2".
Could someone clear up this?

Thank you very much,
Nast