How to change longitude range in a NetCDF

Question

My NetCDF file has 4 dimensions (longitude, latitude, time, level pressure) and several variables.

I want to replace the longitude data which is [340 342 344 ... 36

Answer 1

This is what I found:

ncap2 -O -s 'where(lon>180) lon=lon-360' ifile ofile

I am not sure yet it doesn't change anything else but it seems work.

Answer 2

I realise this is an old thread, but as I had a very similar problem recently I thought I'd add my solution as I didn't manage to find it elsewhere...

I used the cdo package (https://code.zmaw.de/projects/cdo) command sellonlatbox to translate my input data from [0, 360) longitude range to be [-180, 180), and also reorder latitudes to be [-90, 90] (i.e. S -> N):

cdo sellonlatbox,-180,180,-90,90 infile.nc outfile.nc