Re: Bug in fourier_info ???

HI Dennis and NCL developer(s),

I am not really sure, since (as you can see) there is a strong scratch from
30 to 80N at lower atmosphere produced by NCL compared to Matlab output.
Also, 30N poleward up to 10 hPa, the phases decrease with height, "which
are not correct for upward rossby wave propagation (matlab is correct!)! I
am wondering. Is there any way around to have a phase output in NCL from
-phi to +phi? Thanks

On Fri, Apr 4, 2014 at 12:43 AM, Dennis Shea <shea@ucar.edu> wrote:

> [0] I doubt fourier_info has a bug
>
> [1] It is difficult to compare visually since NCL returns the
> phases as 0 to 360 while Matlab (apparently) uses -180 to 180.
> It would be better to match the same ranges.
>
> [2] Suggestion: Use a 'circular' color map to color plot phases.
> That way you do not get abrupt color changes
> at the 'ends': eg 359->1 or -179 and 179
>
> [3] Download the just released 6.2.0. It has few circular color tables
> that may be of use.
> http://www.ncl.ucar.edu/Download/
>
>
>
> On 4/2/14, 2:07 AM, Thomas Tobian wrote:
>
>> Hallo,
>>
>> I've recently tried to calculate the phase from one season data (DJF) with
>> dimension [level,lat,lon]. I rescaled the phase in ncl by 2.5 since the
>> rightmost dimension size is 144. Unfortunately in NCL the calculated phase
>> for wave1 (plotting with contour function), produced really different
>> patterns compared to Matlab. I'm just really curious, is it a bug in phase
>> function of NCL? any suggestion would be really appreciated. Please look
>> at
>> the contour pattern.
>>
>>
>>
>> _______________________________________________
>> 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 Thu Apr 03 16:32:33 2014