clmMonTLL produces nan

Hi all

I have an input dataset of sea level pressure data with named coords (time,
lat, lon) as desired for the function clmMonTLL:

Variable: psli
Type: float
Total Size: 28911504 bytes
            7227876 values
Number of Dimensions: 3
Dimensions and sizes: [time | 2676] x [lat | 37] x [lon | 73]
Coordinates:
            time: [15.5..81433.5]
            lat: [-90..90]
            lon: [-180..180]
Number Of Attributes: 9
  lonFlip : longitude coordinate variable has been reordered via lonFlip
  history : At 00:50:53 on 04/22/2005: CMOR altered the data in the
following ways: replaced missing value flag (1.00000E+28) with standard
missing value (1.00000E+20);
  original_name : mslp
  missing_value : 1e+20
  _FillValue : -999
  cell_methods : time: mean
  units : Pa
  long_name : Sea Level Pressure
  standard_name : air_pressure_at_sea_level

I can plot the data and everything is fine.
Now all I do is this:

pslclm = clmMonTLL(psli)

Produces the output:

Variable: pslclm
Type: float
Total Size: 129648 bytes
            32412 values
Number of Dimensions: 3
Dimensions and sizes: [month | 12] x [lat | 37] x [lon | 73]
Coordinates:
            month: [0..11]
            lat: [-90..90]
            lon: [-180..180]
Number Of Attributes: 11
  lonFlip : longitude coordinate variable has been reordered via lonFlip
  history : At 00:50:53 on 04/22/2005: CMOR altered the data in the
following ways: replaced missing value flag (1.00000E+28) with standard
missing value (1.00000E+20);
  original_name : mslp
  missing_value : 1e+20
  _FillValue : -999
  cell_methods : time: mean
  units : Pa
  long_name : Sea Level Pressure
  standard_name : air_pressure_at_sea_level
  time_op_ncl : Climatology: 223 years
  info : function clmMonLLT: contributed.ncl

So far so good. But if I look at pslclm, every value became a "nan" or
"-nan" like this:
...
(11,31,69) -nan
(11,31,70) nan
(11,31,71) nan
(11,31,72) -nan
(11,32,0) -nan
(11,32,1) nan
(11,32,2) nan
...

The former FillValues are still FillValues.

I didn't find a solution for this problem although I'm sure it's something
stupid.
Thanks for help!
Best regards
Chris

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Received on Thu Aug 2 09:25:29 2012