Re: Interpolation of WRF output to isentropic surfaces / "cape_2d" calc crashing using wrf_user_getvar on standard WRF output

From: Dennis Shea <shea_at_nyahnyahspammersnyahnyah>
Date: Mon Nov 19 2012 - 16:02:59 MST

All questions like this should be sent to wrf-help (cc'd here).

The WRF project has the experts for this type of question(s).

Good luck

On 11/19/12 3:27 PM, Adam Morgan wrote:
> Hi all,
>
> I have two very quick questions.
>
> First, what is the most efficient way to vertically interpolate WRF
> output data to isentropic surfaces? Is it to first interpolate the
> wrfout data on model levels to pressure levels using wrf_interp_3d_z,
> and then interp to isentropic surfaces using int2p_n?
>
> Secondly, regarding CAPE. I have a standard wrfout file, and am trying
> to extract CAPE using wrf_user_getvar(file,"cape_2d",-1). The routine
> crashes, telling me:
>
> capecalc3d: kmax got too big. kmax= 152
>
> I know this comes from the rip_cape.f fortran routine, and refers to
> the vertical levels of my output file somehow (I have output on 150
> vertical levels). But I have no idea what to do with this error, and
> more to the point, why the NCL function is crashing with a basic wrf
> file?
>
> Cheers,
>
> Adam Morgan
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Received on Mon Nov 19 16:03:11 2012

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