[gradsusr] how to visualize the ITCZ ?

[Domingos Urbano]

Dear Kishore,

You can use the wind field output to compute the ITCZ position.
The curl of the windstress map will show you the ITCZ. The line of zero in
the windstress curl is the ITCZ.

Maybe you can get the "windstress curl" directly from your model output.
Otherwise you can apply the derivatives of the u and v fields.

Now.... to compute it using grads I'd let others to help. sorry.

good luck!
Domingos Urbano


E-MAIL ALTERNATIVO: dfurbano at gmail.com
------------------------------------------------------
 Dr. Domingos Urbano
 Instituto Nacional de Pesquisas Espaciais - INPE
 Rodovia Presidente Dutra, km 40
 12630-000 - Cachoeira Paulista - SP - Brasil
 tel: 55(12)3186.9544 fax: 55(12)3101.2835
               www.inpe.br/ingles/
------------------------------------------------------


On Mon, Feb 3, 2014 at 5:02 PM, Eric Altshuler <ela at cola.iges.org> wrote:

> Hello Kishore,
>
> The ITCZ is usually located in the tropical belt between 20S and 20N,
> depending on time of year. Within this band, it's often between 5S - 15N.
> Look at precipitation, outgoing longwave radiation (OLR), or cloud
> variables depending on what fields are available from the model. Keep in
> mind that GCMs often have large biases in tropical precipitation.
>
> Best regards,
>
> Eric L. Altshuler
> Research Scientist
> Center for Ocean-Land-Atmosphere Studies
> 253 Research Hall, Mail Stop 6C5
> George Mason University
> 4400 University Drive
> Fairfax, VA 22030 USA
>
> E-mail: ela at cola.iges.org
> Phone: (703) 993-5725
> Fax: (703) 993-5770
>
>
> ------------------------------
> *From: *"Kishore Ragi" <kishoreragi at gmail.com>
> *To: *"GrADS Users Forum" <gradsusr at gradsusr.org>
> *Sent: *Monday, February 3, 2014 12:58:30 PM
> *Subject: *[gradsusr] how to visualize the ITCZ ?
>
> Dear grads users,
>
> Could please anybody tell me how to visualize the ITCZ with GCM output
> with grads/other?
>
> Help is highly appreciated.
>
> Regards,
>
> Kishore
>
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