[ncl-talk] Strange problem related to linint1_Wrap

[Dave Allured - NOAA Affiliate]

Barry, please notice that there is a HEIGHT coordinate variable attached to
ff1 after interpolation, but there is no such coordinate variable attached
to ff1_s before interpolation.  It looks like the attached HEIGHT
coordinate variable is misleading the plot function in some way.  Try
delete ("ff1&HEIGHT").

I am not familiar with the cross section plotting function.  But it looks
like in the first plot, you are setting some plot resources to set the
range, spacing, and units of the height axis.  I suspect that these
settings are in conflict with the attached HEIGHT coordinates which may
have been generated by linint1_Wrap.  The units are different.  Instead of
deleting the HEIGHT coordinate variable, you could try deleting or
adjusting the conflicting resource settings.

If you want to rescale the attached HEIGHT coordinates from meters to km,
then simply "ff1&HEIGHT = ff1&HEIGHT / 1000".


On Mon, Oct 30, 2023 at 8:08 AM Barry Lynn via ncl-talk <
ncl-talk at mailman.ucar.edu> wrote:

> Hello:
>
> I wanted to use linint1 to interpolate WRF data to height surfaces with
> constant spacing between levels.  But, there are two mysteries.
>
> You can see the WRF data in a cross-section of radar in (a; the variable
> ff1_s below).  When I interpolate the data (b, ff1) is compacted towards
> the bottom of the cross-sectional plot.  Moreover, the height information
> on the y-axis will not plot.
>
> I understand why the data is compacted, but not why I can't eliminate the
> white space above.  If I reduce the range of WRF data sampled in the z
> direction, I just have a truncated cross-section (it doesn't get any closer
> to the top of the cross-section).
>
> I don't see why using ff1 (from the interpolate) would make the labeling
> disappear.
>
> Variable: ff1_s
>
> Type: float
>
> Total Size: 33728 bytes
>
>             8432 values
>
> Number of Dimensions: 2
>
> Dimensions and sizes: [height | 31] x [lon | 272]
>
> Coordinates:
>
> Number Of Attributes: 1
>
>   _FillValue : 9.96921e+36
>
>
> Variable: ff1
>
> Type: float
>
> Total Size: 33728 bytes
>
>             8432 values
>
> Number of Dimensions: 2
>
> Dimensions and sizes: [HEIGHT | 31] x [lon | 272]
>
> Coordinates:
>
>             HEIGHT: [500..15500]
>
> Number Of Attributes: 1
>
>   _FillValue : 9.96921e+36
>
> --
> Barry H. Lynn, Ph.D
> Senior Scientist, Lecturer,
> The Institute of Earth Sciences,
> The Hebrew University of Jerusalem,
> Givat Ram, Jerusalem 91904, Israel
> Tel: 972 547 231 170
> Fax: (972)-25662581
>
> Weather It Is, LTD
> Weather and Climate Focus
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>
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