Re: Ridges and troughs

Dear,

please let me plug to this topic:

Are there any NCL scripts available that automatically draw those
front lines from gridded data, such as GFS or WRF ?

This would be very helpful.

Thanks in advance
   Patrick

"Correia, James" <james.correia@pnl.gov> a écrit :

> I believe you want to draw fronts:
> http://www.ncl.ucar.edu/Document/Functions/Built-in/wmdrft.shtml
> Good luck
> jimmyc
>
>
> On 4/13/09 8:14 AM, "Michel dos Santos Mesquita"
> <Michel.Mesquita@bjerknes.uib.no> wrote:
>
>> Hi,
>>
>> I am working on a plot where I need to draw a 'ridge' line (MSLP
>> chart). In the book "Weather Analysis" page 32 (Djuric), 'ridges' are
>> drawn as kinked lines and 'troughs' as wavy lines. Is there a way to
>> do that using gsn_add_polyline?
>>
>> Another question: I need to make a line illustrating the flow of air
>> in an MSLP chart. This is not a straight line. If I use
>> gsn_add_polyline, the curve I am trying to draw looks more like a
>> 'step function' than a smooth curve. When I try to use a bicubic
>> spline, I get an error saying that I don't have enough input data:
>> "SPLCC or SPLCW - SUPRLS failure". And if I use 'ftcurvs', I get error
>> 4, which means that my lines are not increasing. This is because my
>> latitude and longitude vary (increasing/decreasing). Is there a way to
>> draw such curves in NCL?
>>
>> I thank you so much in advance!
>>
>> Kindest regards,
>>
>> Michel
>> _______________________________________________
>> 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
>

_______________________________________________
ncl-talk mailing list
List instructions, subscriber options, unsubscribe:
http://mailman.ucar.edu/mailman/listinfo/ncl-talk
Received on Tue Apr 14 03:58:24 2009