CAM data are on model hybrid levels,
there are *no* missing data.
vinth2p can interpolate *and* extrapolate.
Levels between the surface pressure and the top
model level are *interpolated*. There should be
no missing values at interpolated levels.
If you are looking at pressure levels that are
below the surface pressure at each grid point,
then you are doing *extrapolation. Extrapolation
is always dangerous!
===
That said, I do not know what you mean by
"When I do vinth2p, the @Fillvalue -999 looks like
taking part in the interpolation."
Did you set the argument "kxtrp=True" ?
http://www.ncl.ucar.edu/Applications/vert_interp.shtml
Example 1
http://www.ncl.ucar.edu/Applications/grid_fill.shtml
Example 3 & 4
===
Good luck
On 6/16/10 7:59 AM, Jun Xu wrote:
> Hi,
> I use vinth2p to interpolate CAM data to prescribed pressure level.
> Missing value existed in my data, I set -999 as the @Fillvalue. I wonder
> how vinth2p process the interpolation when missing value encountered?
>
> When I do vinth2p, the @Fillvalue -999 looks like taking part in the
> interpolation.
> Is anybody having the similar problem or any solution to this?
>
> thanks,
>
> Jun
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Received on Wed Jun 16 11:14:20 2010
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