scaling issue with ECMWF 0.125 degree data

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scaling issue with ECMWF 0.125 degree data

Postby cory » August 19th, 2013, 12:27 am

Hi there,
when using grib2arl on ECMWF 0.125 degree data with either -g3 or -g4 options, there appears to be a scaling problem: SHGT T02M WWND features are displaced with respect to the proper terrain location. My guess is that grib2arl is having trouble interpretting the last decimal place in the resolution and interpretting it as 0.13 degrees. 0.25 degree ECMWF data works fine.

I tried to get around this bug by using the -g0 option to reproject the ec0.125 degree data onto a conformal grid. This correctly placed the SHGT and TMP fields, BUT the UWND fields failed to reproject properly (some levels had UWND = 0). I would guess this is a southern hemisphere issue.

If anyone is interested in looking at these issues I would be happy to make the sample data and control files available for reproducing the bug.
Posts: 3
Joined: August 12th, 2013, 8:24 pm

Re: scaling issue with ECMWF 0.125 degree data

Postby barbara.stunder » August 26th, 2013, 2:36 pm

It shouldn't be a southern hemisphere nor grid size >1000 issue. Yes, I'd like to get a sample of the ECMWF data and your output. Please email me at
Posts: 44
Joined: November 9th, 2012, 4:23 pm

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