[gradsusr] Finding zonal wind core value, and its position

[Muhammad Yunus Ahmad Mazuki]

Well, I'm also looking into other ways in doing this, other than scripting
in GrADS. There are two jet stream, subtropical and polar front, and I want
to track the subtropical jet even when it is weak in strength. I'm also
looking at how to search it degree by degree (or rather y and z point in
GrADS), with some rules. This is because when there is a need to introduce
some events in a model that literally wrecks the usual pattern of the
subtropical jet stream, I need to be sure that my calculation is tracking
purely subtropical jet stream.

Muhammad Yunus

On Wed, Dec 12, 2012 at 1:44 AM, Jeff Duda <jeffduda319 at gmail.com> wrote:

> This is hard to get around given the rules you've set forth.  If you can't
> restrict your search box yet you don't want the maxima that occur at
> certain spots, how can you tell a script to make that distinction?  What is
> it about the one jet core that makes it the one you want?  When you can
> answer that, then you know how to adjust your search to always get the jet
> core you want.
>
> Jeff Duda
>
> On Tue, Dec 11, 2012 at 1:18 AM, Muhammad Yunus Ahmad Mazuki <
> ukm.yunus at gmail.com> wrote:
>
>> Hello,
>>
>> The picture attached is a slice of longitude 180E, from 40 S to 20S. As
>> you can see, the core that I wanted is at the 23S with wind speed of 18. I
>> have tried using maximum value function in grads, as well as maximum
>> location, but it would give me 39S corresponding to a core below 40S, which
>> I do not want. I would like to request suggestion on solving this problem.
>> Changing the latitude range to less than 40S however is not acceptable, as
>> at certain condition the core can be at 38 S.
>>
>> Sincerely,
>> Muhammad Yunus
>>
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>>
>
>
> --
> Jeff Duda
> Graduate research assistant
> University of Oklahoma School of Meteorology
> Center for Analysis and Prediction of Storms
>
>
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