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Improve cdo_sellonlat for extpar_aot_to_buffer.py #393

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Improve cdo_sellonlat for extpar_aot_to_buffer.py #393

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a67c96a
Made cdo_setlonlat adaptable to coarse resolutions of the raw data
stelliom Mar 21, 2025
63cbf4d
Merge branch 'port_aot_to_python' into improve_setlonlat_for_aot_to_b…
stelliom Mar 21, 2025
47924f4
GitHub Action: Apply Pep8-formatting
invalid-email-address Mar 21, 2025
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11 changes: 9 additions & 2 deletions python/extpar_aot_to_buffer.py
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Original file line number Diff line number Diff line change
Expand Up @@ -123,14 +123,21 @@
logging.info('============= CDO: remap to target grid ========')
logging.info('')

# Compute longitude and latitude resolution of the raw dataset
raw_data_aot_nc = nc.Dataset(raw_data_aot, "r")
lon = raw_data_aot_nc.variables['lon']
lat = raw_data_aot_nc.variables['lat']
dlon = lon[1] - lon[0]
dlat = lat[1] - lat[0]

# calculate weights
utils.launch_shell('cdo', '-f', 'nc4', lock, '-P', omp, f'genbil,{grid}',
raw_data_aot, weights)
tg.cdo_sellonlat(dlon, dlat), raw_data_aot, weights)

# regrid aot
utils.launch_shell('cdo', '-f', 'nc4', lock, '-P', omp,
f'settaxis,1111-01-01,0,1mo', f'-remap,{grid},{weights}',
raw_data_aot, aot_cdo)
tg.cdo_sellonlat(dlon, dlat), raw_data_aot, aot_cdo)

#--------------------------------------------------------------------------
#--------------------------------------------------------------------------
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10 changes: 5 additions & 5 deletions python/lib/grid_def.py
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Expand Up @@ -260,7 +260,7 @@ def __init__(self, gridfile):
self.lons = np.rad2deg(self.grid.variables["clon"][:])
self.lats = np.rad2deg(self.grid.variables["clat"][:])

def cdo_sellonlat(self):
def cdo_sellonlat(self, dlon=1.0, dlat=1.0):
'''
create the string for the cdo option "-sellonlatbox"

Expand All @@ -270,11 +270,11 @@ def cdo_sellonlat(self):
'''

extent = {}
extent['maxlon'] = min(math.ceil(np.amax(self.lons) + 1), 180.0)
extent['minlon'] = max(math.floor(np.amin(self.lons) - 1), -180.0)
extent['maxlon'] = min(math.ceil(np.amax(self.lons) + dlon), 180.0)
extent['minlon'] = max(math.floor(np.amin(self.lons) - dlon), -180.0)

extent['maxlat'] = min(math.ceil(np.amax(self.lats) + 1), 90.0)
extent['minlat'] = max(math.floor(np.amin(self.lats) - 1), -90.0)
extent['maxlat'] = min(math.ceil(np.amax(self.lats) + dlat), 90.0)
extent['minlat'] = max(math.floor(np.amin(self.lats) - dlat), -90.0)

cdo_selbox = ('-sellonlatbox,'
f"{extent['minlon']},"
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1 change: 0 additions & 1 deletion python/lib/namelist_template.py
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Expand Up @@ -98,4 +98,3 @@
'raw_data_aot_filename': 'aot_GACP.nc',
'aot_buffer_file': 'aot_buffer.nc',
}