ml2pl and hybrid height coordinates?
Added by Ian MacKenzie over 10 years ago
Hello,
I would like to use the ml2pl function to interpolate NetCDF data (HADGEM2-ES output on the CMIP5 archive) from hybrid height vertical coordinates to pressure levels. The cdo documentation, https://code.zmaw.de/embedded/cdo/1.5.5/cdo.html#x1-220001.4, explains how to specify the z axis for 'hybrid' levels, but shows an example only for hybrid pressure levels. Can you tell me if it is possible to interpolate from hybrid height levels and if so how the ml2pl function distinguishes between a hybrid height and a hybrid pressure vertical coordinate? So far my attempts are failing because ml2pl cannot find surface pressure in the NetCDF when what it actually needs is surface orography.
Ian
Replies (2)
RE: ml2pl and hybrid height coordinates? - Added by Ralf Mueller over 10 years ago
what about the ml2hl operator?
RE: ml2pl and hybrid height coordinates? - Added by Ian MacKenzie over 10 years ago
Thanks for the suggestion but I get the same error with ml2pl: 'cdo ml2hl (Abort): Surface pressure not found!' My suspicion is that these operators work only with hybrid pressure model levels and not hybrid height. But it'd be good to hear if someone knows otherwise.
Ian