[ncl-talk] nighttime zero cape from skewT_PlotData ?

[Dennis Shea]

Really, someone would have to track the calculations to see what is
happening.



Sometimes it helps to look at ncl-talk archives. A recent thread on CAPE:

http://mailman.ucar.edu/pipermail/ncl-talk/2016-April/005509.html

As noted: Numerous CAPE algorithms were tested. The resulting CAPE
estimates varied considerably.

Do you think your sounding was unstable?

====


On Wed, May 11, 2016 at 7:45 AM, xiaoming Hu <yuanfangcan at hotmail.com>
wrote:

> I got 0 cape from skewT_PlotData   always during nighttime. see:
>
> http://www.caps.ou.edu/micronet/WRF-UCM/FocusON_OKC/WRFV3.7.1/with_rr_fixed/wrfNCEP_DOE2d_UCM_Snudge_WangRec53waveCU14YSUparameterp_1.2005060100/wrfout_d01_skewt_1.png
>
> which is different from what I got from
>   cinfo = wrf_cape_2d(pres , tk, q, z, HGT, PSFC, True )
>   mcape = cinfo(0,:,:)
>
>
>
> Apparently wrf_cape_2d  gives non-zero values.
>
> Anything wrong for one of them?
>
> Thanks
> Xiaoming
>
>
>
> ------------------------------
> Date: Fri, 22 Apr 2016 14:51:24 -0600
> Subject: Re: [ncl-talk] Where to download 6.4.0 right now?
> From: haley at ucar.edu
> To: yuanfangcan at hotmail.com
> CC: ncl-talk at ucar.edu
>
> Xiaoming,
>
> We've been testing "conda" as a distribution mechanism for NCL, and we
> have a test version of NCL that you can try using this.  Please note that
> this is a TEST version, as we haven't released V6.4.0 yet.  This version
> does have the cape_2d fix.
>
> Here's how to get "conda"
>
> 1) Download "miniconda" from:
>
> http://conda.pydata.org/miniconda.html
>
> Get the Python 2.7 version and not Python 3.5.
>
> 2) Install from a UNIX terminal window by typing:
>
> conda create --name ncl_test --channel dbrown --channel khallock ncl
>
> This creates a conda environment called "ncl_test" in which you switch in
> and out of from your default version of NCL
>
> 3) To activate the "ncl_test" environment, type (from bash/sh):
>
> source activate ncl_test
>
> 4) Test NCL by typing:
>
> ncl -V
> ng4ex xy01n -clean
>
> If you have problems with the conda version, we would like to know about
> this right away, as we are still testing it out.
>
> Thanks,
>
> --Mary
>
>
> On Fri, Apr 22, 2016 at 2:26 PM, xiaoming Hu <yuanfangcan at hotmail.com>
> wrote:
>
> I noticed
> *cape_2d* Returns 2D fields mcape/mcin/lcl/lfc *Bug fixed in NCL V6.4.0*
>
> Where to download 6.4.0 right now?
>
> Thanks
> Xiaoming
>
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