GiOcean constant variables

scratch.py

#!/usr/bin/env python

import xarray as xr

ds = xr.open_dataset("GiOCEAN_e1.sfc_tavg_3hr_glo_L720x361_sfc.20241101_0730z.nc4")

coord_vars = list(ds.coords)

stdev = ds.std()

var_names_all = list(stdev.variables)
var_names = list(set(var_names_all) - {"lon", "lat", "lev", "time"})

# Print variables for which standard deviation is zero
constant_vars = [var for var in var_names if stdev[var] == 0]
print(constant_vars)