def convert(grib):
factories = []
references = []
standard_name = None
long_name = None
units = None
attributes = {}
cell_methods = []
dim_coords_and_dims = []
aux_coords_and_dims = []
if \
(grib.gridType=="regular_ll") and \
(grib.jPointsAreConsecutive == 0):
dim_coords_and_dims.append(
(DimCoord(grib._y_points,
grib._y_coord_name,
units='degrees',
coord_system=grib._coord_system), 0))
dim_coords_and_dims.append((DimCoord(grib._x_points,
grib._x_coord_name,
units='degrees',
coord_system=grib._coord_system,
circular=grib._x_circular), 1))
if \
(grib.gridType=="regular_ll") and \
(grib.jPointsAreConsecutive == 1):
dim_coords_and_dims.append(
(DimCoord(grib._y_points,
grib._y_coord_name,
units='degrees',
coord_system=grib._coord_system), 1))
dim_coords_and_dims.append((DimCoord(grib._x_points,
grib._x_coord_name,
units='degrees',
coord_system=grib._coord_system,
circular=grib._x_circular), 0))
if \
(grib.gridType=="regular_gg") and \
(grib.jPointsAreConsecutive == 0):
dim_coords_and_dims.append(
(DimCoord(grib._y_points,
grib._y_coord_name,
units='degrees',
coord_system=grib._coord_system), 0))
dim_coords_and_dims.append((DimCoord(grib._x_points,
grib._x_coord_name,
units='degrees',
coord_system=grib._coord_system,
circular=grib._x_circular), 1))
if \
(grib.gridType=="regular_gg") and \
(grib.jPointsAreConsecutive == 1):
dim_coords_and_dims.append(
(DimCoord(grib._y_points,
grib._y_coord_name,
units='degrees',
coord_system=grib._coord_system), 1))
dim_coords_and_dims.append((DimCoord(grib._x_points,
grib._x_coord_name,
units='degrees',
coord_system=grib._coord_system,
circular=grib._x_circular), 0))
if \
(grib.gridType=="rotated_ll") and \
(grib.jPointsAreConsecutive == 0):
dim_coords_and_dims.append(
(DimCoord(grib._y_points,
grib._y_coord_name,
units='degrees',
coord_system=grib._coord_system), 0))
dim_coords_and_dims.append((DimCoord(grib._x_points,
grib._x_coord_name,
units='degrees',
coord_system=grib._coord_system,
circular=grib._x_circular), 1))
if \
(grib.gridType=="rotated_ll") and \
(grib.jPointsAreConsecutive == 1):
dim_coords_and_dims.append(
(DimCoord(grib._y_points,
grib._y_coord_name,
units='degrees',
coord_system=grib._coord_system), 1))
dim_coords_and_dims.append((DimCoord(grib._x_points,
grib._x_coord_name,
units='degrees',
coord_system=grib._coord_system,
circular=grib._x_circular), 0))
if grib.gridType in ["polar_stereographic", "lambert"]:
dim_coords_and_dims.append(
(DimCoord(grib._y_points,
grib._y_coord_name,
units="m",
coord_system=grib._coord_system), 0))
dim_coords_and_dims.append(
(DimCoord(grib._x_points,
grib._x_coord_name,
units="m",
coord_system=grib._coord_system), 1))
if \
(grib.edition == 1) and \
(grib.table2Version < 128) and \
(grib.indicatorOfParameter == 11) and \
(grib._cf_data is None):
standard_name = "air_temperature"
units = "kelvin"
if \
(grib.edition == 1) and \
(grib.table2Version < 128) and \
(grib.indicatorOfParameter == 33) and \
(grib._cf_data is None):
standard_name = "x_wind"
units = "m s-1"
if \
(grib.edition == 1) and \
(grib.table2Version < 128) and \
(grib.indicatorOfParameter == 34) and \
(grib._cf_data is None):
standard_name = "y_wind"
units = "m s-1"
if \
(grib.edition == 1) and \
(grib._cf_data is not None):
standard_name = grib._cf_data.standard_name
long_name = grib._cf_data.standard_name or grib._cf_data.long_name
units = grib._cf_data.units
if \
(grib.edition == 1) and \
(grib.table2Version >= 128) and \
(grib._cf_data is None):
long_name = "UNKNOWN LOCAL PARAM " + str(
grib.indicatorOfParameter) + "." + str(grib.table2Version)
units = "???"
if \
(grib.edition == 1) and \
(grib.table2Version == 1) and \
(grib.indicatorOfParameter >= 128):
long_name = "UNKNOWN LOCAL PARAM " + str(
grib.indicatorOfParameter) + "." + str(grib.table2Version)
units = "???"
if \
(grib.edition == 2) and \
(grib._cf_data is not None):
standard_name = grib._cf_data.standard_name
long_name = grib._cf_data.long_name
units = grib._cf_data.units
if \
(grib.edition == 1) and \
(grib._phenomenonDateTime != -1.0):
aux_coords_and_dims.append(
(DimCoord(points=grib.startStep,
standard_name='forecast_period',
units=grib._forecastTimeUnit), None))
aux_coords_and_dims.append(
(DimCoord(points=grib.phenomenon_points('hours'),
standard_name='time',
units=Unit('hours since epoch',
iris.unit.CALENDAR_GREGORIAN)), None))
if \
(grib.edition == 1) and \
(grib.timeRangeIndicator == 3):
aux_coords_and_dims.append(
(DimCoord(points=grib.startStep,
standard_name='forecast_period',
units=grib._forecastTimeUnit), None))
aux_coords_and_dims.append(
(DimCoord(points=np.mean(grib.phenomenon_bounds('hours')),
bounds=grib.phenomenon_bounds('hours'),
standard_name='time',
units=Unit('hours since epoch',
iris.unit.CALENDAR_GREGORIAN)), None))
cell_methods.append(CellMethod("mean", coords="time"))
if \
(grib.edition == 1) and \
(grib.timeRangeIndicator == 4):
aux_coords_and_dims.append(
(DimCoord(points=grib.startStep,
standard_name='forecast_period',
units=grib._forecastTimeUnit), None))
aux_coords_and_dims.append(
(DimCoord(points=np.mean(grib.phenomenon_bounds('hours')),
bounds=grib.phenomenon_bounds('hours'),
standard_name='time',
units=Unit('hours since epoch',
iris.unit.CALENDAR_GREGORIAN)), None))
cell_methods.append(CellMethod("sum", coords="time"))
if \
(grib.edition == 1) and \
(grib.timeRangeIndicator == 5):
aux_coords_and_dims.append(
(DimCoord(points=grib.startStep,
standard_name='forecast_period',
units=grib._forecastTimeUnit), None))
aux_coords_and_dims.append(
(DimCoord(points=np.mean(grib.phenomenon_bounds('hours')),
bounds=grib.phenomenon_bounds('hours'),
standard_name='time',
units=Unit('hours since epoch',
iris.unit.CALENDAR_GREGORIAN)), None))
cell_methods.append(CellMethod("_difference", coords="time"))
if \
(grib.edition == 1) and \
(grib.timeRangeIndicator == 51):
aux_coords_and_dims.append(
(DimCoord(points=grib.startStep,
standard_name='forecast_period',
units=grib._forecastTimeUnit), None))
aux_coords_and_dims.append(
(DimCoord(points=np.mean(grib.phenomenon_bounds('hours')),
bounds=grib.phenomenon_bounds('hours'),
standard_name='time',
units=Unit('hours since epoch',
iris.unit.CALENDAR_GREGORIAN)), None))
cell_methods.append(CellMethod("mean", coords="time"))
if \
(grib.edition == 1) and \
(grib.timeRangeIndicator == 113):
aux_coords_and_dims.append(
(DimCoord(points=grib.startStep,
standard_name='forecast_period',
units=grib._forecastTimeUnit), None))
aux_coords_and_dims.append(
(DimCoord(points=np.mean(grib.phenomenon_bounds('hours')),
bounds=grib.phenomenon_bounds('hours'),
standard_name='time',
units=Unit('hours since epoch',
iris.unit.CALENDAR_GREGORIAN)), None))
cell_methods.append(CellMethod("mean", coords="time"))
if \
(grib.edition == 1) and \
(grib.timeRangeIndicator == 114):
aux_coords_and_dims.append(
(DimCoord(points=grib.startStep,
standard_name='forecast_period',
units=grib._forecastTimeUnit), None))
aux_coords_and_dims.append(
(DimCoord(points=np.mean(grib.phenomenon_bounds('hours')),
bounds=grib.phenomenon_bounds('hours'),
standard_name='time',
units=Unit('hours since epoch',
iris.unit.CALENDAR_GREGORIAN)), None))
cell_methods.append(CellMethod("sum", coords="time"))
if \
(grib.edition == 1) and \
(grib.timeRangeIndicator == 115):
aux_coords_and_dims.append(
(DimCoord(points=grib.startStep,
standard_name='forecast_period',
units=grib._forecastTimeUnit), None))
aux_coords_and_dims.append(
(DimCoord(points=np.mean(grib.phenomenon_bounds('hours')),
bounds=grib.phenomenon_bounds('hours'),
standard_name='time',
units=Unit('hours since epoch',
iris.unit.CALENDAR_GREGORIAN)), None))
cell_methods.append(CellMethod("mean", coords="time"))
if \
(grib.edition == 1) and \
(grib.timeRangeIndicator == 116):
aux_coords_and_dims.append(
(DimCoord(points=grib.startStep,
standard_name='forecast_period',
units=grib._forecastTimeUnit), None))
aux_coords_and_dims.append(
(DimCoord(points=np.mean(grib.phenomenon_bounds('hours')),
bounds=grib.phenomenon_bounds('hours'),
standard_name='time',
units=Unit('hours since epoch',
iris.unit.CALENDAR_GREGORIAN)), None))
cell_methods.append(CellMethod("sum", coords="time"))
if \
(grib.edition == 1) and \
(grib.timeRangeIndicator == 117):
aux_coords_and_dims.append(
(DimCoord(points=grib.startStep,
standard_name='forecast_period',
units=grib._forecastTimeUnit), None))
aux_coords_and_dims.append(
(DimCoord(points=np.mean(grib.phenomenon_bounds('hours')),
bounds=grib.phenomenon_bounds('hours'),
standard_name='time',
units=Unit('hours since epoch',
iris.unit.CALENDAR_GREGORIAN)), None))
cell_methods.append(CellMethod("mean", coords="time"))
if \
(grib.edition == 1) and \
(grib.timeRangeIndicator == 118):
aux_coords_and_dims.append(
(DimCoord(points=grib.startStep,
standard_name='forecast_period',
units=grib._forecastTimeUnit), None))
aux_coords_and_dims.append(
(DimCoord(points=np.mean(grib.phenomenon_bounds('hours')),
bounds=grib.phenomenon_bounds('hours'),
standard_name='time',
units=Unit('hours since epoch',
iris.unit.CALENDAR_GREGORIAN)), None))
cell_methods.append(CellMethod("_covariance", coords="time"))
if \
(grib.edition == 1) and \
(grib.timeRangeIndicator == 123):
aux_coords_and_dims.append(
(DimCoord(points=grib.startStep,
standard_name='forecast_period',
units=grib._forecastTimeUnit), None))
aux_coords_and_dims.append(
(DimCoord(points=np.mean(grib.phenomenon_bounds('hours')),
bounds=grib.phenomenon_bounds('hours'),
standard_name='time',
units=Unit('hours since epoch',
iris.unit.CALENDAR_GREGORIAN)), None))
cell_methods.append(CellMethod("mean", coords="time"))
if \
(grib.edition == 1) and \
(grib.timeRangeIndicator == 124):
aux_coords_and_dims.append(
(DimCoord(points=grib.startStep,
standard_name='forecast_period',
units=grib._forecastTimeUnit), None))
aux_coords_and_dims.append(
(DimCoord(points=np.mean(grib.phenomenon_bounds('hours')),
bounds=grib.phenomenon_bounds('hours'),
standard_name='time',
units=Unit('hours since epoch',
iris.unit.CALENDAR_GREGORIAN)), None))
cell_methods.append(CellMethod("sum", coords="time"))
if \
(grib.edition == 1) and \
(grib.timeRangeIndicator == 125):
aux_coords_and_dims.append(
(DimCoord(points=grib.startStep,
standard_name='forecast_period',
units=grib._forecastTimeUnit), None))
aux_coords_and_dims.append(
(DimCoord(points=np.mean(grib.phenomenon_bounds('hours')),
bounds=grib.phenomenon_bounds('hours'),
standard_name='time',
units=Unit('hours since epoch',
iris.unit.CALENDAR_GREGORIAN)), None))
cell_methods.append(CellMethod("standard_deviation", coords="time"))
if \
(grib.edition == 2) and \
(grib.productDefinitionTemplateNumber == 0):
aux_coords_and_dims.append(
(DimCoord(points=Unit(grib._forecastTimeUnit).convert(
np.int32(grib._forecastTime), "hours"),
standard_name='forecast_period',
units="hours"), None))
aux_coords_and_dims.append(
(DimCoord(points=grib.phenomenon_points('hours'),
standard_name='time',
units=Unit('hours since epoch',
iris.unit.CALENDAR_GREGORIAN)), None))
if \
(grib.edition == 2) and \
(grib.productDefinitionTemplateNumber in (8, 9)):
aux_coords_and_dims.append(
(DimCoord(points=Unit(grib._forecastTimeUnit).convert(
np.int32(grib._forecastTime), "hours"),
standard_name='forecast_period',
units="hours"), None))
aux_coords_and_dims.append(
(DimCoord(points=np.mean(grib.phenomenon_bounds('hours')),
standard_name='time',
units=Unit('hours since epoch',
iris.unit.CALENDAR_GREGORIAN),
bounds=grib.phenomenon_bounds('hours')), None))
if \
(grib.edition == 2) and \
(grib.productDefinitionTemplateNumber == 8) and \
(grib.typeOfStatisticalProcessing == 0):
cell_methods.append(CellMethod("mean", coords="time"))
if \
(grib.edition == 2) and \
(grib.productDefinitionTemplateNumber == 8) and \
(grib.typeOfStatisticalProcessing == 1):
cell_methods.append(CellMethod("sum", coords="time"))
if \
(grib.edition == 2) and \
(grib.productDefinitionTemplateNumber == 8) and \
(grib.typeOfStatisticalProcessing == 2):
cell_methods.append(CellMethod("maximum", coords="time"))
if \
(grib.edition == 2) and \
(grib.productDefinitionTemplateNumber == 8) and \
(grib.typeOfStatisticalProcessing == 3):
cell_methods.append(CellMethod("minimum", coords="time"))
if \
(grib.edition == 2) and \
(grib.productDefinitionTemplateNumber == 8) and \
(grib.typeOfStatisticalProcessing == 4):
cell_methods.append(CellMethod("_difference", coords="time"))
if \
(grib.edition == 2) and \
(grib.productDefinitionTemplateNumber == 8) and \
(grib.typeOfStatisticalProcessing == 5):
cell_methods.append(CellMethod("_root_mean_square", coords="time"))
if \
(grib.edition == 2) and \
(grib.productDefinitionTemplateNumber == 8) and \
(grib.typeOfStatisticalProcessing == 6):
cell_methods.append(CellMethod("standard_deviation", coords="time"))
if \
(grib.edition == 2) and \
(grib.productDefinitionTemplateNumber == 8) and \
(grib.typeOfStatisticalProcessing == 7):
cell_methods.append(CellMethod("_convariance", coords="time"))
if \
(grib.edition == 2) and \
(grib.productDefinitionTemplateNumber == 8) and \
(grib.typeOfStatisticalProcessing == 8):
cell_methods.append(CellMethod("_difference", coords="time"))
if \
(grib.edition == 2) and \
(grib.productDefinitionTemplateNumber == 8) and \
(grib.typeOfStatisticalProcessing == 9):
cell_methods.append(CellMethod("_ratio", coords="time"))
if \
(grib.edition == 1) and \
(grib.levelType == 'pl'):
aux_coords_and_dims.append((DimCoord(points=grib.level,
long_name="pressure",
units="hPa"), None))
if \
(grib.edition == 1) and \
(grib.levelType == 'sfc') and \
(grib._cf_data is not None) and \
(grib._cf_data.set_height is not None):
aux_coords_and_dims.append((DimCoord(points=grib._cf_data.set_height,
long_name="height",
units="m",
attributes={'positive':
'up'}), None))
if \
(grib.edition == 2) and \
(grib.typeOfFirstFixedSurface == 100) and \
(grib.typeOfSecondFixedSurface == 255):
aux_coords_and_dims.append(
(DimCoord(points=grib.scaledValueOfFirstFixedSurface /
(10.0**grib.scaleFactorOfFirstFixedSurface),
long_name="pressure",
units="Pa"), None))
if \
(grib.edition == 2) and \
(grib.typeOfFirstFixedSurface == 100) and \
(grib.typeOfSecondFixedSurface != 255):
aux_coords_and_dims.append((DimCoord(
points=0.5 * (grib.scaledValueOfFirstFixedSurface /
(10.0**grib.scaleFactorOfFirstFixedSurface) +
grib.scaledValueOfSecondFixedSurface /
(10.0**grib.scaleFactorOfSecondFixedSurface)),
long_name="pressure",
units="Pa",
bounds=[
grib.scaledValueOfFirstFixedSurface /
(10.0**grib.scaleFactorOfFirstFixedSurface),
grib.scaledValueOfSecondFixedSurface /
(10.0**grib.scaleFactorOfSecondFixedSurface)
]), None))
if \
(grib.edition == 2) and \
(grib.typeOfFirstFixedSurface in [105, 119]) and \
(grib.numberOfCoordinatesValues > 0):
aux_coords_and_dims.append(
(AuxCoord(grib.scaledValueOfFirstFixedSurface,
standard_name='model_level_number',
attributes={'positive': 'up'}), None))
aux_coords_and_dims.append(
(DimCoord(grib.pv[grib.scaledValueOfFirstFixedSurface],
long_name='level_pressure',
units='Pa'), None))
aux_coords_and_dims.append(
(AuxCoord(grib.pv[grib.numberOfCoordinatesValues / 2 +
grib.scaledValueOfFirstFixedSurface],
long_name='sigma'), None))
factories.append(
Factory(HybridPressureFactory, [{
'long_name': 'level_pressure'
}, {
'long_name': 'sigma'
},
Reference('surface_pressure')]))
if grib._originatingCentre != 'unknown':
aux_coords_and_dims.append((AuxCoord(points=grib._originatingCentre,
long_name='originating_centre',
units='no_unit'), None))
if \
(grib.edition == 2) and \
(grib.productDefinitionTemplateNumber == 1):
aux_coords_and_dims.append((DimCoord(points=grib.perturbationNumber,
long_name='ensemble_member',
units='no_unit'), None))
if grib.productDefinitionTemplateNumber not in (0, 8):
attributes["GRIB_LOAD_WARNING"] = (
"unsupported GRIB%d ProductDefinitionTemplate: #4.%d" %
(grib.edition, grib.productDefinitionTemplateNumber))
if \
(grib.edition == 2) and \
(grib.centre == 'ecmf') and \
(grib.discipline == 0) and \
(grib.parameterCategory == 3) and \
(grib.parameterNumber == 25) and \
(grib.typeOfFirstFixedSurface == 105):
references.append(
ReferenceTarget(
'surface_pressure', lambda cube: {
'standard_name': 'surface_air_pressure',
'units': 'Pa',
'data': np.exp(cube.data)
}))
return (factories, references, standard_name, long_name, units, attributes,
cell_methods, dim_coords_and_dims, aux_coords_and_dims)
def _convert_vertical_coords(lbcode,
lbvc,
blev,
lblev,
stash,
bhlev,
bhrlev,
brsvd1,
brsvd2,
brlev,
dim=None):
"""
Encode scalar or vector vertical level values from PP headers as CM data
components.
Args:
* lbcode:
Scalar field :class:`iris.fileformats.pp.SplittableInt` value.
* lbvc:
Scalar field value.
* blev:
Scalar field value or :class:`numpy.ndarray` vector of field values.
* lblev:
Scalar field value or :class:`numpy.ndarray` vector of field values.
* stash:
Scalar field :class:`iris.fileformats.pp.STASH` value.
* bhlev:
Scalar field value or :class:`numpy.ndarray` vector of field values.
* bhrlev:
Scalar field value or :class:`numpy.ndarray` vector of field values.
* brsvd1:
Scalar field value or :class:`numpy.ndarray` vector of field values.
* brsvd2:
Scalar field value or :class:`numpy.ndarray` vector of field values.
* brlev:
Scalar field value or :class:`numpy.ndarray` vector of field values.
Kwargs:
* dim:
Associated dimension of the vertical coordinate. Defaults to None.
Returns:
A tuple containing a list of coords_and_dims, and a list of factories.
"""
factories = []
coords_and_dims = []
# See Word no. 33 (LBLEV) in section 4 of UM Model Docs (F3).
BASE_RHO_LEVEL_LBLEV = 9999
model_level_number = np.atleast_1d(lblev)
model_level_number[model_level_number == BASE_RHO_LEVEL_LBLEV] = 0
# Ensure to vectorise these arguments as arrays, as they participate
# in the conditions of convert rules.
blev = np.atleast_1d(blev)
brsvd1 = np.atleast_1d(brsvd1)
brlev = np.atleast_1d(brlev)
# Height.
if (lbvc == 1) and \
str(stash) not in STASHCODE_IMPLIED_HEIGHTS and \
np.all(blev != -1):
coord = _dim_or_aux(blev,
standard_name='height',
units='m',
attributes={'positive': 'up'})
coords_and_dims.append((coord, dim))
if str(stash) in STASHCODE_IMPLIED_HEIGHTS:
height = STASHCODE_IMPLIED_HEIGHTS[str(stash)]
coord = DimCoord(height,
standard_name='height',
units='m',
attributes={'positive': 'up'})
coords_and_dims.append((coord, None))
# Model level number.
if (len(lbcode) != 5) and \
(lbvc == 2):
coord = _dim_or_aux(model_level_number,
standard_name='model_level_number',
attributes={'positive': 'down'})
coords_and_dims.append((coord, dim))
# Depth - unbound.
if (len(lbcode) != 5) and \
(lbvc == 2) and \
np.all(brsvd1 == brlev):
coord = _dim_or_aux(blev,
standard_name='depth',
units='m',
attributes={'positive': 'down'})
coords_and_dims.append((coord, dim))
# Depth - bound.
if (len(lbcode) != 5) and \
(lbvc == 2) and \
np.all(brsvd1 != brlev):
coord = _dim_or_aux(blev,
standard_name='depth',
units='m',
bounds=np.vstack((brsvd1, brlev)).T,
attributes={'positive': 'down'})
coords_and_dims.append((coord, dim))
# Depth - unbound and bound (mixed).
if (len(lbcode) != 5) and \
(lbvc == 2) and \
(np.any(brsvd1 == brlev) and np.any(brsvd1 != brlev)):
lower = np.where(brsvd1 == brlev, blev, brsvd1)
upper = np.where(brsvd1 == brlev, blev, brlev)
coord = _dim_or_aux(blev,
standard_name='depth',
units='m',
bounds=np.vstack((lower, upper)).T,
attributes={'positive': 'down'})
coords_and_dims.append((coord, dim))
# Soil level/depth.
if len(lbcode) != 5 and lbvc == 6:
if np.all(brsvd1 == 0) and np.all(brlev == 0):
# UM populates lblev, brsvd1 and brlev metadata INCORRECTLY,
# so continue to treat as a soil level.
coord = _dim_or_aux(model_level_number,
long_name='soil_model_level_number',
attributes={'positive': 'down'})
coords_and_dims.append((coord, dim))
elif np.any(brsvd1 != brlev):
# UM populates metadata CORRECTLY,
# so treat it as the expected (bounded) soil depth.
coord = _dim_or_aux(blev,
standard_name='depth',
units='m',
bounds=np.vstack((brsvd1, brlev)).T,
attributes={'positive': 'down'})
coords_and_dims.append((coord, dim))
# Pressure.
if (lbvc == 8) and \
(len(lbcode) != 5 or (len(lbcode) == 5 and
1 not in [lbcode.ix, lbcode.iy])):
coord = _dim_or_aux(blev, long_name='pressure', units='hPa')
coords_and_dims.append((coord, dim))
# Air potential temperature.
if (len(lbcode) != 5) and \
(lbvc == 19):
coord = _dim_or_aux(blev,
standard_name='air_potential_temperature',
units='K',
attributes={'positive': 'up'})
coords_and_dims.append((coord, dim))
# Hybrid pressure levels.
if lbvc == 9:
model_level_number = _dim_or_aux(model_level_number,
standard_name='model_level_number',
attributes={'positive': 'up'})
level_pressure = _dim_or_aux(bhlev,
long_name='level_pressure',
units='Pa',
bounds=np.vstack((bhrlev, brsvd2)).T)
sigma = AuxCoord(blev,
long_name='sigma',
bounds=np.vstack((brlev, brsvd1)).T)
coords_and_dims.extend([(model_level_number, dim),
(level_pressure, dim), (sigma, dim)])
factories.append(
Factory(HybridPressureFactory,
[{
'long_name': 'level_pressure'
}, {
'long_name': 'sigma'
},
Reference('surface_air_pressure')]))
# Hybrid height levels.
if lbvc == 65:
model_level_number = _dim_or_aux(model_level_number,
standard_name='model_level_number',
attributes={'positive': 'up'})
level_height = _dim_or_aux(blev,
long_name='level_height',
units='m',
bounds=np.vstack((brlev, brsvd1)).T,
attributes={'positive': 'up'})
sigma = AuxCoord(bhlev,
long_name='sigma',
bounds=np.vstack((bhrlev, brsvd2)).T)
coords_and_dims.extend([(model_level_number, dim), (level_height, dim),
(sigma, dim)])
factories.append(
Factory(HybridHeightFactory, [{
'long_name': 'level_height'
}, {
'long_name': 'sigma'
},
Reference('orography')]))
return coords_and_dims, factories
def convert(grib):
"""
Converts a GRIB message into the corresponding items of Cube metadata.
Args:
* grib:
A :class:`~iris.fileformats.grib.GribWrapper` object.
Returns:
A :class:`iris.fileformats.rules.ConversionMetadata` object.
"""
factories = []
references = []
standard_name = None
long_name = None
units = None
attributes = {}
cell_methods = []
dim_coords_and_dims = []
aux_coords_and_dims = []
# deprecation warning for this code path for edition 2 messages
if grib.edition == 2:
msg = ('This GRIB loader is deprecated and will be removed in '
'a future release. Please consider using the new '
'GRIB loader by setting the :class:`iris.Future` '
'option `strict_grib_load` to True; e.g.:\n'
'iris.FUTURE.strict_grib_load = True\n'
'Please report issues you experience to:\n'
'https://groups.google.com/forum/#!topic/scitools-iris-dev/'
'lMsOusKNfaU')
warn_deprecated(msg)
if \
(grib.gridType=="reduced_gg"):
aux_coords_and_dims.append(
(AuxCoord(grib._y_points,
grib._y_coord_name,
units='degrees',
coord_system=grib._coord_system), 0))
aux_coords_and_dims.append(
(AuxCoord(grib._x_points,
grib._x_coord_name,
units='degrees',
coord_system=grib._coord_system), 0))
if \
(grib.gridType=="regular_ll") and \
(grib.jPointsAreConsecutive == 0):
dim_coords_and_dims.append(
(DimCoord(grib._y_points,
grib._y_coord_name,
units='degrees',
coord_system=grib._coord_system), 0))
dim_coords_and_dims.append((DimCoord(grib._x_points,
grib._x_coord_name,
units='degrees',
coord_system=grib._coord_system,
circular=grib._x_circular), 1))
if \
(grib.gridType=="regular_ll") and \
(grib.jPointsAreConsecutive == 1):
dim_coords_and_dims.append(
(DimCoord(grib._y_points,
grib._y_coord_name,
units='degrees',
coord_system=grib._coord_system), 1))
dim_coords_and_dims.append((DimCoord(grib._x_points,
grib._x_coord_name,
units='degrees',
coord_system=grib._coord_system,
circular=grib._x_circular), 0))
if \
(grib.gridType=="regular_gg") and \
(grib.jPointsAreConsecutive == 0):
dim_coords_and_dims.append(
(DimCoord(grib._y_points,
grib._y_coord_name,
units='degrees',
coord_system=grib._coord_system), 0))
dim_coords_and_dims.append((DimCoord(grib._x_points,
grib._x_coord_name,
units='degrees',
coord_system=grib._coord_system,
circular=grib._x_circular), 1))
if \
(grib.gridType=="regular_gg") and \
(grib.jPointsAreConsecutive == 1):
dim_coords_and_dims.append(
(DimCoord(grib._y_points,
grib._y_coord_name,
units='degrees',
coord_system=grib._coord_system), 1))
dim_coords_and_dims.append((DimCoord(grib._x_points,
grib._x_coord_name,
units='degrees',
coord_system=grib._coord_system,
circular=grib._x_circular), 0))
if \
(grib.gridType=="rotated_ll") and \
(grib.jPointsAreConsecutive == 0):
dim_coords_and_dims.append(
(DimCoord(grib._y_points,
grib._y_coord_name,
units='degrees',
coord_system=grib._coord_system), 0))
dim_coords_and_dims.append((DimCoord(grib._x_points,
grib._x_coord_name,
units='degrees',
coord_system=grib._coord_system,
circular=grib._x_circular), 1))
if \
(grib.gridType=="rotated_ll") and \
(grib.jPointsAreConsecutive == 1):
dim_coords_and_dims.append(
(DimCoord(grib._y_points,
grib._y_coord_name,
units='degrees',
coord_system=grib._coord_system), 1))
dim_coords_and_dims.append((DimCoord(grib._x_points,
grib._x_coord_name,
units='degrees',
coord_system=grib._coord_system,
circular=grib._x_circular), 0))
if grib.gridType in ["polar_stereographic", "lambert"]:
dim_coords_and_dims.append(
(DimCoord(grib._y_points,
grib._y_coord_name,
units="m",
coord_system=grib._coord_system), 0))
dim_coords_and_dims.append(
(DimCoord(grib._x_points,
grib._x_coord_name,
units="m",
coord_system=grib._coord_system), 1))
if \
(grib.edition == 1) and \
(grib.table2Version < 128) and \
(grib.indicatorOfParameter == 11) and \
(grib._cf_data is None):
standard_name = "air_temperature"
units = "kelvin"
if \
(grib.edition == 1) and \
(grib.table2Version < 128) and \
(grib.indicatorOfParameter == 33) and \
(grib._cf_data is None):
standard_name = "x_wind"
units = "m s-1"
if \
(grib.edition == 1) and \
(grib.table2Version < 128) and \
(grib.indicatorOfParameter == 34) and \
(grib._cf_data is None):
standard_name = "y_wind"
units = "m s-1"
if \
(grib.edition == 1) and \
(grib._cf_data is not None):
standard_name = grib._cf_data.standard_name
long_name = grib._cf_data.standard_name or grib._cf_data.long_name
units = grib._cf_data.units
if \
(grib.edition == 1) and \
(grib.table2Version >= 128) and \
(grib._cf_data is None):
long_name = "UNKNOWN LOCAL PARAM " + str(
grib.indicatorOfParameter) + "." + str(grib.table2Version)
units = "???"
if \
(grib.edition == 1) and \
(grib.table2Version == 1) and \
(grib.indicatorOfParameter >= 128):
long_name = "UNKNOWN LOCAL PARAM " + str(
grib.indicatorOfParameter) + "." + str(grib.table2Version)
units = "???"
if \
(grib.edition == 2) and \
(grib._cf_data is not None):
standard_name = grib._cf_data.standard_name
long_name = grib._cf_data.long_name
units = grib._cf_data.units
if \
(grib.edition == 1) and \
(grib._phenomenonDateTime != -1.0):
aux_coords_and_dims.append(
(DimCoord(points=grib.startStep,
standard_name='forecast_period',
units=grib._forecastTimeUnit), None))
aux_coords_and_dims.append(
(DimCoord(points=grib.phenomenon_points('hours'),
standard_name='time',
units=Unit('hours since epoch',
CALENDAR_GREGORIAN)), None))
def add_bounded_time_coords(aux_coords_and_dims, grib):
t_bounds = grib.phenomenon_bounds('hours')
period = Unit('hours').convert(t_bounds[1] - t_bounds[0],
grib._forecastTimeUnit)
aux_coords_and_dims.append(
(DimCoord(standard_name='forecast_period',
units=grib._forecastTimeUnit,
points=grib._forecastTime + 0.5 * period,
bounds=[grib._forecastTime,
grib._forecastTime + period]), None))
aux_coords_and_dims.append(
(DimCoord(standard_name='time',
units=Unit('hours since epoch', CALENDAR_GREGORIAN),
points=0.5 * (t_bounds[0] + t_bounds[1]),
bounds=t_bounds), None))
if \
(grib.edition == 1) and \
(grib.timeRangeIndicator == 2):
add_bounded_time_coords(aux_coords_and_dims, grib)
if \
(grib.edition == 1) and \
(grib.timeRangeIndicator == 3):
add_bounded_time_coords(aux_coords_and_dims, grib)
cell_methods.append(CellMethod("mean", coords="time"))
if \
(grib.edition == 1) and \
(grib.timeRangeIndicator == 4):
add_bounded_time_coords(aux_coords_and_dims, grib)
cell_methods.append(CellMethod("sum", coords="time"))
if \
(grib.edition == 1) and \
(grib.timeRangeIndicator == 5):
add_bounded_time_coords(aux_coords_and_dims, grib)
cell_methods.append(CellMethod("_difference", coords="time"))
if \
(grib.edition == 1) and \
(grib.timeRangeIndicator == 51):
add_bounded_time_coords(aux_coords_and_dims, grib)
cell_methods.append(CellMethod("mean", coords="time"))
if \
(grib.edition == 1) and \
(grib.timeRangeIndicator == 113):
add_bounded_time_coords(aux_coords_and_dims, grib)
cell_methods.append(CellMethod("mean", coords="time"))
if \
(grib.edition == 1) and \
(grib.timeRangeIndicator == 114):
add_bounded_time_coords(aux_coords_and_dims, grib)
cell_methods.append(CellMethod("sum", coords="time"))
if \
(grib.edition == 1) and \
(grib.timeRangeIndicator == 115):
add_bounded_time_coords(aux_coords_and_dims, grib)
cell_methods.append(CellMethod("mean", coords="time"))
if \
(grib.edition == 1) and \
(grib.timeRangeIndicator == 116):
add_bounded_time_coords(aux_coords_and_dims, grib)
cell_methods.append(CellMethod("sum", coords="time"))
if \
(grib.edition == 1) and \
(grib.timeRangeIndicator == 117):
add_bounded_time_coords(aux_coords_and_dims, grib)
cell_methods.append(CellMethod("mean", coords="time"))
if \
(grib.edition == 1) and \
(grib.timeRangeIndicator == 118):
add_bounded_time_coords(aux_coords_and_dims, grib)
cell_methods.append(CellMethod("_covariance", coords="time"))
if \
(grib.edition == 1) and \
(grib.timeRangeIndicator == 123):
add_bounded_time_coords(aux_coords_and_dims, grib)
cell_methods.append(CellMethod("mean", coords="time"))
if \
(grib.edition == 1) and \
(grib.timeRangeIndicator == 124):
add_bounded_time_coords(aux_coords_and_dims, grib)
cell_methods.append(CellMethod("sum", coords="time"))
if \
(grib.edition == 1) and \
(grib.timeRangeIndicator == 125):
add_bounded_time_coords(aux_coords_and_dims, grib)
cell_methods.append(CellMethod("standard_deviation", coords="time"))
if \
(grib.edition == 2) and \
(grib.productDefinitionTemplateNumber in [0, 1]):
aux_coords_and_dims.append(
(DimCoord(points=Unit(grib._forecastTimeUnit).convert(
np.int32(grib._forecastTime), "hours"),
standard_name='forecast_period',
units="hours"), None))
aux_coords_and_dims.append(
(DimCoord(points=grib.phenomenon_points('hours'),
standard_name='time',
units=Unit('hours since epoch',
CALENDAR_GREGORIAN)), None))
if \
(grib.edition == 2) and \
(grib.productDefinitionTemplateNumber in (8, 9, 11)):
add_bounded_time_coords(aux_coords_and_dims, grib)
if \
(grib.edition == 2) and \
(grib.productDefinitionTemplateNumber in (1, 11)) and \
(grib.perturbationNumber is not None):
cell_methods.append(
CellMethod('realization',
coords=('realization', ),
intervals=('1', ),
comments=(' ENS', )))
if \
(grib.edition == 2) and \
(grib.productDefinitionTemplateNumber in (8, 11)) and \
(grib.typeOfStatisticalProcessing == 0):
cell_methods.append(CellMethod("mean", coords="time"))
if \
(grib.edition == 2) and \
(grib.productDefinitionTemplateNumber in (8, 11)) and \
(grib.typeOfStatisticalProcessing == 1):
cell_methods.append(CellMethod("sum", coords="time"))
if \
(grib.edition == 2) and \
(grib.productDefinitionTemplateNumber in (8, 11)) and \
(grib.typeOfStatisticalProcessing == 2):
cell_methods.append(CellMethod("maximum", coords="time"))
if \
(grib.edition == 2) and \
(grib.productDefinitionTemplateNumber in (8, 11)) and \
(grib.typeOfStatisticalProcessing == 3):
cell_methods.append(CellMethod("minimum", coords="time"))
if \
(grib.edition == 2) and \
(grib.productDefinitionTemplateNumber in (8, 11)) and \
(grib.typeOfStatisticalProcessing == 4):
cell_methods.append(CellMethod("_difference", coords="time"))
if \
(grib.edition == 2) and \
(grib.productDefinitionTemplateNumber in (8, 11)) and \
(grib.typeOfStatisticalProcessing == 5):
cell_methods.append(CellMethod("_root_mean_square", coords="time"))
if \
(grib.edition == 2) and \
(grib.productDefinitionTemplateNumber in (8, 11)) and \
(grib.typeOfStatisticalProcessing == 6):
cell_methods.append(CellMethod("standard_deviation", coords="time"))
if \
(grib.edition == 2) and \
(grib.productDefinitionTemplateNumber in (8, 11)) and \
(grib.typeOfStatisticalProcessing == 7):
cell_methods.append(CellMethod("_convariance", coords="time"))
if \
(grib.edition == 2) and \
(grib.productDefinitionTemplateNumber in (8, 11)) and \
(grib.typeOfStatisticalProcessing == 8):
cell_methods.append(CellMethod("_difference", coords="time"))
if \
(grib.edition == 2) and \
(grib.productDefinitionTemplateNumber in (8, 11)) and \
(grib.typeOfStatisticalProcessing == 9):
cell_methods.append(CellMethod("_ratio", coords="time"))
if \
(grib.edition == 1) and \
(grib.levelType == 'pl'):
aux_coords_and_dims.append((DimCoord(points=grib.level,
long_name="pressure",
units="hPa"), None))
if \
(grib.edition == 1) and \
(grib.levelType == 'sfc'):
if (grib._cf_data is not None) and \
(grib._cf_data.set_height is not None):
aux_coords_and_dims.append(
(DimCoord(points=grib._cf_data.set_height,
long_name="height",
units="m",
attributes={'positive': 'up'}), None))
elif grib.typeOfLevel == 'heightAboveGround': # required for NCAR
aux_coords_and_dims.append((DimCoord(points=grib.level,
long_name="height",
units="m",
attributes={'positive':
'up'}), None))
if \
(grib.edition == 1) and \
(grib.levelType == 'ml') and \
(hasattr(grib, 'pv')):
aux_coords_and_dims.append(
(AuxCoord(grib.level,
standard_name='model_level_number',
attributes={'positive': 'up'}), None))
aux_coords_and_dims.append((DimCoord(grib.pv[grib.level],
long_name='level_pressure',
units='Pa'), None))
aux_coords_and_dims.append((AuxCoord(
grib.pv[grib.numberOfCoordinatesValues // 2 + grib.level],
long_name='sigma'), None))
factories.append(
Factory(HybridPressureFactory, [{
'long_name': 'level_pressure'
}, {
'long_name': 'sigma'
},
Reference('surface_pressure')]))
if \
(grib.edition == 2) and \
(grib.typeOfFirstFixedSurface != grib.typeOfSecondFixedSurface):
warnings.warn("Different vertical bound types not yet handled.")
if \
(grib.edition == 2) and \
(grib.typeOfFirstFixedSurface == 103) and \
(grib.typeOfSecondFixedSurface == 255):
aux_coords_and_dims.append(
(DimCoord(points=grib.scaledValueOfFirstFixedSurface /
(10.0**grib.scaleFactorOfFirstFixedSurface),
standard_name="height",
units="m"), None))
if \
(grib.edition == 2) and \
(grib.typeOfFirstFixedSurface == 103) and \
(grib.typeOfSecondFixedSurface != 255):
aux_coords_and_dims.append((DimCoord(
points=0.5 * (grib.scaledValueOfFirstFixedSurface /
(10.0**grib.scaleFactorOfFirstFixedSurface) +
grib.scaledValueOfSecondFixedSurface /
(10.0**grib.scaleFactorOfSecondFixedSurface)),
standard_name="height",
units="m",
bounds=[
grib.scaledValueOfFirstFixedSurface /
(10.0**grib.scaleFactorOfFirstFixedSurface),
grib.scaledValueOfSecondFixedSurface /
(10.0**grib.scaleFactorOfSecondFixedSurface)
]), None))
if \
(grib.edition == 2) and \
(grib.typeOfFirstFixedSurface == 100) and \
(grib.typeOfSecondFixedSurface == 255):
aux_coords_and_dims.append(
(DimCoord(points=grib.scaledValueOfFirstFixedSurface /
(10.0**grib.scaleFactorOfFirstFixedSurface),
long_name="pressure",
units="Pa"), None))
if \
(grib.edition == 2) and \
(grib.typeOfFirstFixedSurface == 100) and \
(grib.typeOfSecondFixedSurface != 255):
aux_coords_and_dims.append((DimCoord(
points=0.5 * (grib.scaledValueOfFirstFixedSurface /
(10.0**grib.scaleFactorOfFirstFixedSurface) +
grib.scaledValueOfSecondFixedSurface /
(10.0**grib.scaleFactorOfSecondFixedSurface)),
long_name="pressure",
units="Pa",
bounds=[
grib.scaledValueOfFirstFixedSurface /
(10.0**grib.scaleFactorOfFirstFixedSurface),
grib.scaledValueOfSecondFixedSurface /
(10.0**grib.scaleFactorOfSecondFixedSurface)
]), None))
# required for NCMRWF
if \
(grib.edition == 2) and \
(grib.typeOfFirstFixedSurface == 106) and \
(grib.typeOfSecondFixedSurface != 255):
aux_coords_and_dims.append((DimCoord(
points=0.5 * (grib.scaledValueOfFirstFixedSurface /
(10.0**grib.scaleFactorOfFirstFixedSurface) +
grib.scaledValueOfSecondFixedSurface /
(10.0**grib.scaleFactorOfSecondFixedSurface)),
standard_name="depth",
long_name="depth_below_land_surface",
units="m",
bounds=[
grib.scaledValueOfFirstFixedSurface /
(10.0**grib.scaleFactorOfFirstFixedSurface),
grib.scaledValueOfSecondFixedSurface /
(10.0**grib.scaleFactorOfSecondFixedSurface)
]), None))
if \
(grib.edition == 2) and \
(grib.typeOfFirstFixedSurface in [105, 119]) and \
(grib.numberOfCoordinatesValues > 0):
aux_coords_and_dims.append(
(AuxCoord(grib.scaledValueOfFirstFixedSurface,
standard_name='model_level_number',
attributes={'positive': 'up'}), None))
aux_coords_and_dims.append(
(DimCoord(grib.pv[grib.scaledValueOfFirstFixedSurface],
long_name='level_pressure',
units='Pa'), None))
aux_coords_and_dims.append(
(AuxCoord(grib.pv[grib.numberOfCoordinatesValues // 2 +
grib.scaledValueOfFirstFixedSurface],
long_name='sigma'), None))
factories.append(
Factory(HybridPressureFactory,
[{
'long_name': 'level_pressure'
}, {
'long_name': 'sigma'
},
Reference('surface_air_pressure')]))
if grib._originatingCentre != 'unknown':
aux_coords_and_dims.append((AuxCoord(points=grib._originatingCentre,
long_name='originating_centre',
units='no_unit'), None))
if \
(grib.edition == 2) and \
(grib.productDefinitionTemplateNumber in [1, 11]):
aux_coords_and_dims.append((DimCoord(points=grib.perturbationNumber,
standard_name='realization',
long_name='ensemble_member',
units='no_unit'), None))
if \
(grib.edition == 2) and \
grib.productDefinitionTemplateNumber not in (0, 1, 8, 11):
attributes["GRIB_LOAD_WARNING"] = (
"unsupported GRIB%d ProductDefinitionTemplate: #4.%d" %
(grib.edition, grib.productDefinitionTemplateNumber))
if \
(grib.edition == 2) and \
(grib.centre == 'ecmf') and \
(grib.discipline == 0) and \
(grib.parameterCategory == 3) and \
(grib.parameterNumber == 25) and \
(grib.typeOfFirstFixedSurface == 105):
references.append(
ReferenceTarget(
'surface_air_pressure', lambda cube: {
'standard_name': 'surface_air_pressure',
'units': 'Pa',
'data': np.exp(cube.data)
}))
return ConversionMetadata(factories, references, standard_name, long_name,
units, attributes, cell_methods,
dim_coords_and_dims, aux_coords_and_dims)
def _convert_scalar_vertical_coords(lbcode, lbvc, blev, lblev, stash,
bhlev, bhrlev, brsvd1, brsvd2, brlev):
"""
Encode scalar vertical level values from PP headers as CM data components.
Returns (<list of coords_and_dims>, <list of factories>)
"""
factories = []
coords_and_dims = []
model_level_number = _model_level_number(lblev)
if \
(lbvc == 1) and \
(str(stash) not in STASHCODE_IMPLIED_HEIGHTS) and \
(blev != -1):
coords_and_dims.append(
(DimCoord(blev, standard_name='height', units='m',
attributes={'positive': 'up'}),
None))
if str(stash) in STASHCODE_IMPLIED_HEIGHTS:
coords_and_dims.append(
(DimCoord(STASHCODE_IMPLIED_HEIGHTS[str(stash)],
standard_name='height', units='m',
attributes={'positive': 'up'}),
None))
if \
(len(lbcode) != 5) and \
(lbvc == 2):
coords_and_dims.append((DimCoord(model_level_number, standard_name='model_level_number', attributes={'positive': 'down'}), None))
if \
(len(lbcode) != 5) and \
(lbvc == 2) and \
(brsvd1 == brlev):
coords_and_dims.append((DimCoord(blev, standard_name='depth', units='m', attributes={'positive': 'down'}), None))
if \
(len(lbcode) != 5) and \
(lbvc == 2) and \
(brsvd1 != brlev):
coords_and_dims.append((DimCoord(blev, standard_name='depth', units='m', bounds=[brsvd1, brlev], attributes={'positive': 'down'}), None))
# soil level
if len(lbcode) != 5 and lbvc == 6:
coords_and_dims.append((DimCoord(model_level_number, long_name='soil_model_level_number', attributes={'positive': 'down'}), None))
if \
(lbvc == 8) and \
(len(lbcode) != 5 or (len(lbcode) == 5 and 1 not in [lbcode.ix, lbcode.iy])):
coords_and_dims.append((DimCoord(blev, long_name='pressure', units='hPa'), None))
if \
(len(lbcode) != 5) and \
(lbvc == 19):
coords_and_dims.append((DimCoord(blev, standard_name='air_potential_temperature', units='K', attributes={'positive': 'up'}), None))
# Hybrid pressure levels (--> scalar coordinates)
if lbvc == 9:
model_level_number = DimCoord(model_level_number,
standard_name='model_level_number',
attributes={'positive': 'up'})
# The following match the hybrid height scheme, but data has the
# blev and bhlev values the other way around.
#level_pressure = DimCoord(blev,
# long_name='level_pressure',
# units='Pa',
# bounds=[brlev, brsvd1])
#sigma = AuxCoord(bhlev,
# long_name='sigma',
# bounds=[bhrlev, brsvd2])
level_pressure = DimCoord(bhlev,
long_name='level_pressure',
units='Pa',
bounds=[bhrlev, brsvd2])
sigma = AuxCoord(blev,
long_name='sigma',
bounds=[brlev, brsvd1])
coords_and_dims.extend([(model_level_number, None),
(level_pressure, None),
(sigma, None)])
factories.append(Factory(HybridPressureFactory,
[{'long_name': 'level_pressure'},
{'long_name': 'sigma'},
Reference('surface_air_pressure')]))
# Hybrid height levels (--> scalar coordinates + factory)
if lbvc == 65:
coords_and_dims.append((DimCoord(model_level_number, standard_name='model_level_number', attributes={'positive': 'up'}), None))
coords_and_dims.append((DimCoord(blev, long_name='level_height', units='m', bounds=[brlev, brsvd1], attributes={'positive': 'up'}), None))
coords_and_dims.append((AuxCoord(bhlev, long_name='sigma', bounds=[bhrlev, brsvd2]), None))
factories.append(Factory(HybridHeightFactory, [{'long_name': 'level_height'}, {'long_name': 'sigma'}, Reference('orography')]))
return coords_and_dims, factories
