fldmean area weighted
Added by Juanma Sancho almost 12 years ago
I need to make sure that CDO is computing area weighted means when using fldmean operator over the attached file. I don't get any warning message so I assume an area weighted mean is computed. The cell-measures attribute is not defined in the nc file so CDO should get the cell area from the geographical coordinates otherwise it would warn about the use of a constant area weights for all grid cells. Am I correct?
Thanks for your help
Regards
Replies (1)
RE: fldmean area weighted - Added by Jaison-Thomas Ambadan almost 12 years ago
Hi,
I need to make sure that CDO is computing area weighted means when using fldmean operator
I don't get any warning message so I assume an area weighted mean is computed.
If you are NOT getting any warning message(s), then it means CDO computes the area weighted mean from the grid info. Please have a look at https://code.zmaw.de/embedded/cdo/1.5.4/cdo.html#x1-120001.3.1
In your file, the GRIB code defines the grid type. I guess it is Cylindrical Equidistant Projection Grid. Anyway, CDO then calculate the cell/grid area using the given grid info.
Cheers,
J.