Re: Vertical cross section and vectors

I think you must provide a (say) png or gif.
Also, perhaps, a clean www downloadable script and data.

If that is not possible,

ftp ftp.cgd.ucar.edu
anonymous
<use your email address for the password>
cd incoming
put ...
put ...
quit

Send email to ncl-talk after you have successfully completed the
transfer stating the exact names of the files you transferred

On 7/23/12 10:43 PM, Tess Parker wrote:
> Thanks Dai - I tried multiplying the /w/ component by 1000, but no luck
> with the plot. I'm not sure what you mean by "and the vertical altitude"?
>
> Regards
> Tess
>
> 戴国锟 wrote:
>> Tess,
>> You can multiply 1000 to your w-wind and the vertical altitude, so
>> that the vertical motion will be evident.
>> Good luck!
>> Dai
>>
>> 2012/7/24 Tess Parker <tess.parker@monash.edu
>> <mailto:tess.parker@monash.edu>>
>>
>> Hello all - I am trying to plot a vertical cross section, against
>> altitude in meters, along a particular line of longitude, with
>> vectors representing the winds.
>>
>> I have used ERA-Interim data, with /v/ for the meridional wind and
>> a calculated vertical wind /w/ from the ERAI omega vertical
>> motion, so both /v/ and /w/ are in units of m/s. These are on
>> pressure levels, so I have used the ERAI geopotential field /z/ to
>> calculate a height in meters for each grid point (pressure level,
>> lat, lon). I have then used the /int2p_n/ function to interpolate
>> the /v/ and /w/ arrays to altitude levels using the height field.
>> All good so far.
>>
>> The problem I am having is in trying to plot the wind vectors. My
>> cross section should run from 90 deg South to the equator, and
>> from the surface to about 20,000 meters altitude. I understand
>> that the aspect ratio of this plot will cause a problem; the
>> horizontal axis scale is about 10^7 meters, and the vertical only
>> about 10^4. Also, the horizontal component of the wind /v/ is of
>> order of magnitude 10, and the vertical only about 0.01. The
>> question is, how do I get the vectors to plot so that upward or
>> downward motion is clearly evident? And how can I be sure that the
>> vectors represent the true angle of the vector wind field, which
>> is of great importance in this particular case?
>>
>> Many thanks for any assistance!
>>
>>
>> --
>> Tess Parker
>> PhD Candidate
>> School of Mathematical Sciences
>> Room 225, Building 28
>> Monash University, Clayton VIC 3800
>> Phone: +61 3 9905 4458
>>
>>
>>
>> _______________________________________________
>> ncl-talk mailing list
>> List instructions, subscriber options, unsubscribe:
>> http://mailman.ucar.edu/mailman/listinfo/ncl-talk
>>
>>
>
>
> --
> Tess Parker
> PhD Candidate
> School of Mathematical Sciences
> Room 225, Building 28
> Monash University, Clayton VIC 3800
> Phone: +61 3 9905 4458
>
>
>
> _______________________________________________
> ncl-talk mailing list
> List instructions, subscriber options, unsubscribe:
> http://mailman.ucar.edu/mailman/listinfo/ncl-talk
>

_______________________________________________
ncl-talk mailing list
List instructions, subscriber options, unsubscribe:
http://mailman.ucar.edu/mailman/listinfo/ncl-talk
Received on Tue Jul 24 09:05:57 2012