GCM output on i,j grid instead of lat,lon

Hi everyone,

I am experiencing a problem when plotting sea ice extent as a spaghetti
plot from one of the CMIP5 output models. It seems that the BNU model is
on an i,j grid whereas all other models (that I have used at least) are on
a lat,lon grid.

So when I printVarSummary for the BNU variable I am trying to plot I get:
Variable: sicBNU_6070_rcp45
Type: float
Total Size: 144000 bytes
            36000 values
Number of Dimensions: 2
Dimensions and sizes: [j | 100] x [i | 360]
Coordinates:
            j: [101..200]
            i: [1..360]
Number Of Attributes: 11
  standard_name : sea_ice_area_fraction
  long_name : Sea Ice Area Fraction
  comment : fraction of grid cell covered by sea ice.

Whereas for the other models I get something like:

Variable: sicMIROC_CHEM_6070_rcp45
Type: float
Total Size: 98304 bytes
            24576 values
Number of Dimensions: 2
Dimensions and sizes: [lat | 96] x [lon | 256]
Coordinates:
            lat: [0.2790889739990234..89.14443969726562]
            lon: [0.703125..359.296875]
Number Of Attributes: 11
  standard_name : sea_ice_area_fraction
  long_name : Sea Ice Area Fraction
  comment : fraction of grid cell covered by sea ice.

When I try to make the spaghetti plot, it runs but gives a very wrong
looking result for the BNU model. The other models look good. I should
mention that the BNU output does indeed have lat and lon but as separate
variables. When I use ncview to look at the BNU data it looks fine, but I
am assuming NCL is having problems since its dimensions are not lat,lon.
Is that right? Does anyone see a good way to work around this?

Thanks in advance for any help or suggestions!
MB

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Received on Sat Jun 1 10:34:22 2013