[RegCNET] Sigma levels

[Travis O'Brien]

Dear Netsanet,

The ATM output files for RegCM contain a variable called 'sigma', which
contains the sigma levels.

You can print these values simply using the ncdump utility, e.g.:
ncdump -v sigma WNA_ATM2007010100.nc

Hopefully this helps.

Kind Regards,
-Travis-


On Tue, Sep 17, 2013 at 1:12 PM, Mirkana Degenie <mirkanag at yahoo.com> wrote:

> Dear all
>
> I did an experiment having 60 vertical levels using RegCM. I want to
> repeat the same experiment using WRF. But I couldn't get the vertical
> levels in sigma coordinate. In the grads descriptor file the vertical
> coordinate of the output(ZDEF) is given to be (zdef   60 levels     0.0
> 50.0   96.5  139.8  180.2  217.9  253.2  286.3  317.4  346.6  374.1  400.0
> 424.5  447.7  469.6  490.5  510.3  529.1  547.1  564.3  580.7  596.4
> 611.5  626.0  640.0  653.4  666.4  679.0  691.1  702.9  714.4  725.6
> 736.4  747.1  757.4  767.6  777.6  787.4  797.0  806.5  815.9  825.1
> 834.3  843.4  852.4  861.4  870.3  879.2  888.2  897.1  906.0  915.0
> 924.1  933.2  942.3  951.6  961.0  970.5  980.2  990.0). So I was wondering
> how could I change this to sigma coordinate(as surface pressure is not the
> same). I would appreciate if anyone can suggest me how to calculate the
> numbers in sigma coordinate.
>
> regards,
> Netsanet
>
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