[ncl-talk] CAPE calculation

[Dennis Shea]

NCL developers did not write CAPE_{2D/3D) fortran subroutines called by
NCL. I have no experience with these functions.

I have attached the fortran code invoked by NCL. Perhaps the following
subroutines will provide some insight.

DCAPECALC3D
DCAPECALC2D

Note that at the top of the code a disclaimer is issued:

"! Also, be advised that missing data values are not checked during the
computation."
===
Perhaps some input variable has _FillValue

Good Luck



On Tue, Nov 9, 2021 at 10:21 AM Wang, Jiali via ncl-talk <
ncl-talk at mailman.ucar.edu> wrote:

> Dear NCL users,
>
>
>
> I have been using wrf_get_uservar to get cape_2d and cape_3d for my
> research domain, over the Great Lakes region. There are water bodies and
> land. I noticed there are many missing values in both cape_2d and 3d
> outcomes. See some examples attached. I have also tried to use wrf_cape_2d
> to calculate cape_2d, and I made sure the PSFC is converted to hPa. The
> outcome is almost the same, with lots of missing values. Missing values are
> located over different places at different times.
>
>
>
> However, it seems the missing value is not expected?
> https://www.ncl.ucar.edu/Support/talk_archives/2013/2422.html
>
>
>
> Can you advice what is the correct way to calculate CAPE or whether I am
> getting reasonable results?
>
>
>
> Thank you!
>
> Jiali
>
>
>
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