Vertical interpolation with ERA5 pressure levels
Added by Jorge Navarro about 5 years ago
Hi,
We want to obtain the vertical interpolation at 500 meters above ground level of the u and v wind components, from ERA5 data on pressure levels (GRIB format). We use the option ap2hl and the results is:
cdo ap2hl,500 -selname,u,v ERA520181005 uv500_20181005
cdo(1) selname: Process started
cdo ap2hl (Abort): air_pressure not found!
Can you help me? What is wrong?
Thanks a lot,
Jorge
| ERA520181005 (20.4 MB) ERA520181005 | ERA5 GRIB data |
Replies (1)
RE: Vertical interpolation with ERA5 pressure levels - Added by Ralf Mueller about 5 years ago
Hi!
your data is on pressure levels (not hybrid pressure levels - that's why ap2pl doesn't work). For interpolation to heights, you have to go through the documentation of ERA5 and check if
- you can download the data on your target coordinate
- you can download the data on the model levels and do the interpolation on your own
I think ERA uses hybrid sigma pressure level, therefor I would use the ml2hl operator. But please, check the ERA documentation first
- https://confluence.ecmwf.int/display/CKB/ERA5%3A+data+documentation#ERA5:datadocumentation-Levellistings
- https://www.ecmwf.int/en/forecasts/documentation-and-support/137-model-levels
an possibly elsewhere
hth
ralf