[gradsusr] STREAM FUNCTION

[kalyan chakravarthy]

Thanks for your reply
Actually am using meridional wind component (vwind) and
so am trying to plot (find) rising motion and sinking motion
over latitude from -90S to 90N (i.e we can see three cells Hadley, Ferrel,
Polar)
at different pressure levels
for this am using
sdfopen vwnd.nc
sdfopen wwnd.nc (vertical velocity)
set lat -90 90
set lon 40 110
set lev 500
d skip(vwnd,1,1);-vvel*1.0*e3 (this command have got it from grads document
from IISc)
if you give this command its plotting the wind directions but not rising n
sinking motions
vvel is pressure velocity.




On Mon, Sep 17, 2012 at 12:59 PM, Sravan <sravan_sase at yahoo.in> wrote:

> Hi,
> Let me know the script that you are using to calculate the stream function
> and the error message.
>
> Sravan
>
>
> *From:* kalyan chakravarthy <kalyan4space at gmail.com>
> *To:* gradsusr at gradsusr.org
> *Sent:* Monday, 17 September 2012 12:07 PM
> *Subject:* [gradsusr] STREAM FUNCTION
>
>
> Dear All,
>
>
> I have global wind data at 2.5 degrees resolution and need to calculate
>
> and display a mean meridional wind stream function (rising and sinking
>
> motions of three cells) in GrADS. I have choose domain -90S/90N and 40/110E.
>
> Then I want to calculate and display psi.I'm having trouble figuring out a way to
>
> structure this within GrADS. How to calculate psi from wind components.
>
> Any suggestions, or a script for me to use?  Thanks.
>
>
> --
> Regards
> Y.Kalyan Chakravarthy
> Indian Meteorological Department
> New Delhi
>
>
>
>
>
>
>
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-- 
Regards
Y.Kalyan Chakravarthy
Indian Meteorological Department
New Delhi

*" No single technology will stop global warming, but there is a silver
bullet: *
*a cap on carbon that will launch all these solutions into the mainstream".*
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