def load_state(dt):
prmsl = twcr.load('prmsl', dt, version='2c')
prmsl = to_analysis_grid(prmsl.extract(iris.Constraint(member=1)))
t2m = twcr.load('air.2m', dt, version='2c')
t2m = to_analysis_grid(t2m.extract(iris.Constraint(member=1)))
u10m = twcr.load('uwnd.10m', dt, version='2c')
u10m = to_analysis_grid(u10m.extract(iris.Constraint(member=1)))
v10m = twcr.load('vwnd.10m', dt, version='2c')
v10m = to_analysis_grid(v10m.extract(iris.Constraint(member=1)))
return (t2m, prmsl, u10m, v10m)
def test_fetch_mslp(self):
with self.assertRaises(Exception) as cm:
tc = twcr.load('mslp',
datetime.datetime(1969, 3, 12),
version=version)
self.assertIn("One or more of the files specified did not exist",
str(cm.exception))
def qc_compare_reanalysis(obs, variable='prmsl', version='2c'):
"""Get 20CR ensemble values at the time and place of each observation.
Args:
obs (:obj:`pandas.DataFrame`): Observations. Dataframe must have columns 'latitude', 'longitude', and 'dtm' - the last a datetime.datetime.
variable (:obj:`str`): Which 20CR variable to compare to. Defaults to 'prmsl'
version (:obj:`str`): Which 20CR version to load data from. Defaults to '2c'
Returns
:obj:`pandas.Series`: Reanalyis ensemble associated with each observation.
|
"""
old_idx = obs.index
obs = obs.reset_index() # index values 0-n
ob_times = obs['dtm'].unique()
results = [None] * len(obs)
for ob_time in ob_times:
ot = pandas.to_datetime(ob_time)
ensemble = twcr.load(variable, ot, version=version)
# Units hack - assumes obs in hPa (if prmsl)
if variable == 'prmsl':
ensemble.data = ensemble.data / 100.0 # to hPa
interpolator = iris.analysis.Linear().interpolator(
ensemble, ['latitude', 'longitude'])
this_time = obs['dtm'][obs['dtm'] == ob_time].index
for ob_idx in this_time:
ensemble = interpolator(
[obs.latitude[ob_idx], obs.longitude[ob_idx]])
results[ob_idx] = ensemble.data
return pandas.Series(results, index=old_idx)
def get_compressed(year,month,day,hour):
prmsl=twcr.load('prmsl',datetime.datetime(year,month,day,hour),
version='2c')
prmsl=to_analysis_grid(prmsl.extract(iris.Constraint(member=1)))
t2m=twcr.load('air.2m',datetime.datetime(year,month,day,hour),
version='2c')
t2m=to_analysis_grid(t2m.extract(iris.Constraint(member=1)))
u10m=twcr.load('uwnd.10m',datetime.datetime(year,month,day,hour),
version='2c')
u10m=to_analysis_grid(u10m.extract(iris.Constraint(member=1)))
v10m=twcr.load('vwnd.10m',datetime.datetime(year,month,day,hour),
version='2c')
v10m=to_analysis_grid(v10m.extract(iris.Constraint(member=1)))
insol=to_analysis_grid(load_insolation(year,month,day,hour))
# Convert the validation data into tensor format
t2m_t = tf.convert_to_tensor(normalise_t2m(t2m.data),numpy.float32)
t2m_t = tf.reshape(t2m_t,[79,159,1])
prmsl_t = tf.convert_to_tensor(normalise_prmsl(prmsl.data),numpy.float32)
prmsl_t = tf.reshape(prmsl_t,[79,159,1])
u10m_t = tf.convert_to_tensor(normalise_wind(u10m.data),numpy.float32)
u10m_t = tf.reshape(u10m_t,[79,159,1])
v10m_t = tf.convert_to_tensor(normalise_wind(v10m.data),numpy.float32)
v10m_t = tf.reshape(v10m_t,[79,159,1])
insol_t = tf.convert_to_tensor(normalise_insolation(insol.data),numpy.float32)
insol_t = tf.reshape(insol_t,[79,159,1])
ict = tf.concat([t2m_t,prmsl_t,u10m_t,v10m_t,insol_t],2) # Now [79,159,5]
ict = tf.reshape(ict,[1,79,159,5])
result = autoencoder.predict_on_batch(ict)
result = tf.reshape(result,[79,159,5])
ls = encoder.predict_on_batch(ict)
# Convert the encoded fields back to unnormalised cubes
t2m_r=t2m.copy()
t2m_r.data = tf.reshape(result.numpy()[:,:,0],[79,159]).numpy()
t2m_r.data = unnormalise_t2m(t2m_r.data)
prmsl_r=prmsl.copy()
prmsl_r.data = tf.reshape(result.numpy()[:,:,1],[79,159]).numpy()
prmsl_r.data = unnormalise_prmsl(prmsl_r.data)
u10m_r=u10m.copy()
u10m_r.data = tf.reshape(result.numpy()[:,:,2],[79,159]).numpy()
u10m_r.data = unnormalise_wind(u10m_r.data)
v10m_r=v10m.copy()
v10m_r.data = tf.reshape(result.numpy()[:,:,3],[79,159]).numpy()
v10m_r.data = unnormalise_wind(v10m_r.data)
return {'t2m':t2m_r,'prmsl':prmsl_r,'u10m':u10m_r,'v10m':v10m_r,'ls':ls}
def load_daily_scout(year,month,day,version):
e=[]
for hour in (0,3,6,9,12,15,18,21):
f=twcr.load('prmsl',datetime.datetime(year,month,day,hour),version=version)
e.append(f)
e=iris.cube.CubeList(e).merge_cube()
e=e.collapsed('time', iris.analysis.MEAN)
return(e)
def load_daily(year, month, day):
e = []
for hour in (0, 3, 6, 9, 12, 15, 18, 21):
f = twcr.load('tmp',
datetime.datetime(year, month, day, hour),
height=2,
version='4.6.1')
e.append(f)
e = iris.cube.CubeList(e).merge_cube()
e = e.collapsed('time', iris.analysis.MEAN)
return (e)
def test_load_prmsl_interpolated(self):
fake_data_file('prmsl', version, 2010)
with patch.object(iris, 'load_cube',
side_effect=fake_cube) as mock_load:
tc = twcr.load('prmsl',
datetime.datetime(2010, 3, 12, 9),
version=version)
# Right dimensions
self.assertEqual(len(tc.coords()), 4)
# Right ensemble dimension name?
self.assertEqual(tc.coords()[0].long_name, 'member')
# Right time?
self.assertEqual(tc.coords()[3].points[0], 965937)
def get_cycles(dte):
ic = twcr.load('air.2m',
datetime.datetime(dte.year, dte.month, dte.day, dte.hour),
version='2c')
ic = ic.extract(iris.Constraint(member=1))
ic = rr_cube(ic)
ic = normalise_t2m(ic)
t2m = tf.convert_to_tensor(ic.data, numpy.float32)
t2m = tf.reshape(t2m, [79, 159, 1])
ic = twcr.load('prmsl',
datetime.datetime(dte.year, dte.month, dte.day, dte.hour),
version='2c')
ic = ic.extract(iris.Constraint(member=1))
ic = rr_cube(ic)
ic = normalise_prmsl(ic)
prmsl = tf.convert_to_tensor(ic.data, numpy.float32)
prmsl = tf.reshape(prmsl, [79, 159, 1])
ic = twcr.load('uwnd.10m',
datetime.datetime(dte.year, dte.month, dte.day, dte.hour),
version='2c')
ic = ic.extract(iris.Constraint(member=1))
ic = rr_cube(ic)
ic = normalise_wind(ic)
uwnd = tf.convert_to_tensor(ic.data, numpy.float32)
uwnd = tf.reshape(uwnd, [79, 159, 1])
ic = twcr.load('vwnd.10m',
datetime.datetime(dte.year, dte.month, dte.day, dte.hour),
version='2c')
ic = ic.extract(iris.Constraint(member=1))
ic = rr_cube(ic)
ic = normalise_wind(ic)
vwnd = tf.convert_to_tensor(ic.data, numpy.float32)
vwnd = tf.reshape(vwnd, [79, 159, 1])
ict = tf.concat([t2m, prmsl, uwnd, vwnd], 2)
ict = tf.reshape(ict, [1, 79, 159, 4])
res = encoder.predict_on_batch(ict)
return (res)
def prepare_data(date,
purpose='training',
source='20CR2c',
variable='prmsl',
member=1,
normalise=None,
opfile=None):
"""Make tf.load-able files, suitably normalised for training ML models
Data will be stored in directory $SCRATCH/Machine-Learning-experiments.
Args:
date (obj:`datetime.datetime`): datetime to get data for.
purpose (:obj:`str`): 'training' (default) or 'test'.
source (:obj:`str`): Where to get the data from - at the moment, only '20CR2c' is supported .
variable (:obj:`str`): Variable to use (e.g. 'prmsl')
normalise: (:obj:`func`): Function to normalise the data (to mean=0, sd=1). Function must take an :obj:`iris.cube.cube' as argument and returns a normalised cube as result. If None (default) use a standard normalisation function (see :func:`normalise`.
Returns:
Nothing, but creates, as side effect, a tf.load-able file with the normalised data for the given source, variable, and date.
Raises:
ValueError: Unsupported source, or can't load the original data, or normalisation failed.
|
"""
if opfile is None:
opfile = ("%s/Machine-Learning-experiments/datasets/%s/%s/%s" %
(os.getenv('SCRATCH'), source, variable, purpose))
if not os.path.isdir(os.path.dirname(opfile)):
os.makedirs(os.path.dirname(opfile))
ic = twcr.load(variable,
datetime.datetime(date.year, date.month, date.day,
date.hour),
version=args.version)
# Reduce to selected ensemble member
ic = ic.extract(iris.Constraint(member=args.member))
# Normalise (to mean=0, sd=1)
if normalise is None:
normalise = get_normalise_function(source, variable)
ic.data = normalise(ic.data)
# Convert to Tensor
ict = tf.convert_to_tensor(ic.data, numpy.float32)
# Write to tfrecord file
sict = tf.serialize_tensor(ict)
tf.io.write_file(opfile, sict)
args.month,
args.day,
)
if not os.path.isdir(args.opdir):
os.makedirs(args.opdir)
# Get the catchment mask
cGrid = iris.load_cube("%s/../../make_catchment_mask/mask.PRMSL.256x512.nc" %
os.path.dirname(__file__))
coord_s = iris.coord_systems.GeogCS(iris.fileformats.pp.EARTH_RADIUS)
cGrid.coord("latitude").coord_system = coord_s
cGrid.coord("longitude").coord_system = coord_s
dte = datetime.datetime(args.year, args.month, args.day, int(args.hour),
int((args.hour % 1) * 60))
rdata = twcr.load(args.var, dte, version=args.version)
rdata = iris.util.squeeze(rdata)
rdata.coord("latitude").guess_bounds()
rdata.coord("longitude").guess_bounds()
grid_areas = iris.analysis.cartography.area_weights(rdata)
cGrid = cGrid.regrid(rdata, iris.analysis.Linear())
mdata = iris.util.broadcast_to_shape(cGrid.data, rdata.data.shape, (1, 2))
rdata.data = numpy.ma.masked_where(mdata < 0.5, rdata.data)
ensemble = rdata.collapsed(["longitude", "latitude"],
iris.analysis.MEAN,
weights=grid_areas)
pickle.dump(
ensemble.data.data,
open(
"%s/%02d_%02d.pkl" %
parser.add_argument("--day", help="Day of month", type=int, required=True)
parser.add_argument("--hour",
help="Hour of day (0 to 23)",
type=int,
required=True)
parser.add_argument("--member",
help="Ensemble member",
default=1,
type=int,
required=False)
args = parser.parse_args()
# Get the 20CR data
ic = twcr.load('prmsl',
datetime.datetime(args.year, args.month, args.day, args.hour),
version='2c')
ic = ic.extract(iris.Constraint(member=args.member))
# Normalisation - Pa to mean=0, sd=1 - and back
normalise = ML_Utilities.get_normalise_function(source='20CR2c',
variable='prmsl')
unnormalise = ML_Utilities.get_unnormalise_function(source='20CR2c',
variable='prmsl')
# Get the original autoencoder
model_save_file = ("%s/Machine-Learning-experiments/simple_autoencoder/" +
"saved_models/Epoch_%04d") % (os.getenv('SCRATCH'), 100)
autoencoder_original = tf.keras.models.load_model(model_save_file)
# Run the data through the original autoencoder and convert back to iris cube
type=float,
required=True)
parser.add_argument("--opdir",
help="Directory for output files",
default=".",
type=str,
required=False)
args = parser.parse_args()
if not os.path.isdir(args.opdir):
os.makedirs(args.opdir)
dte = datetime.datetime(args.year, args.month, args.day, int(args.hour),
int(args.hour % 1 * 60))
# Plot the temperature
t2m = twcr.load('air.2m', dte, version='2c')
t2m = t2m.extract(iris.Constraint(member=1))
s = t2m.data.shape
t2m.data = qcut(t2m.data.flatten(), 20, labels=False).reshape(s)
# Define the figure (page size, background color, resolution, ...
aspect = 16 / 9.0
fig = Figure(
figsize=(10.8 * aspect, 10.8), # HD video
dpi=100,
facecolor=(0.88, 0.88, 0.88, 1),
edgecolor=None,
linewidth=0.0,
frameon=False, # Don't draw a frame
subplotpars=None,
tight_layout=None)
[0.85380,0.22170,0.02677],[0.84662,0.21407,0.02487],[0.83926,0.20654,0.02305],
[0.83172,0.19912,0.02131],[0.82399,0.19182,0.01966],[0.81608,0.18462,0.01809],
[0.80799,0.17753,0.01660],[0.79971,0.17055,0.01520],[0.79125,0.16368,0.01387],
[0.78260,0.15693,0.01264],[0.77377,0.15028,0.01148],[0.76476,0.14374,0.01041],
[0.75556,0.13731,0.00942],[0.74617,0.13098,0.00851],[0.73661,0.12477,0.00769],
[0.72686,0.11867,0.00695],[0.71692,0.11268,0.00629],[0.70680,0.10680,0.00571],
[0.69650,0.10102,0.00522],[0.68602,0.09536,0.00481],[0.67535,0.08980,0.00449],
[0.66449,0.08436,0.00424],[0.65345,0.07902,0.00408],[0.64223,0.07380,0.00401],
[0.63082,0.06868,0.00401],[0.61923,0.06367,0.00410],[0.60746,0.05878,0.00427],
[0.59550,0.05399,0.00453],[0.58336,0.04931,0.00486],[0.57103,0.04474,0.00529],
[0.55852,0.04028,0.00579],[0.54583,0.03593,0.00638],[0.53295,0.03169,0.00705],
[0.51989,0.02756,0.00780],[0.50664,0.02354,0.00863],[0.49321,0.01963,0.00955],
[0.47960,0.01583,0.01055]]
# Plot the temperature
t2m=twcr.load('air.2m',dte,version='2c')
t2m=t2m.extract(iris.Constraint(member=1))
# Regrid to plot coordinates
plot_cube=mg.utils.dummy_cube(ax,0.25)
t2m = t2m.regrid(plot_cube,iris.analysis.Linear())
# Re-map to highlight small differences
s=t2m.data.shape
t2m.data=qcut(t2m.data.flatten(),20,labels=False).reshape(s)
# Plot as a colour map
lats = t2m.coord('latitude').points
lons = t2m.coord('longitude').points
t2m_img=ax.pcolorfast(lons, lats, t2m.data,
cmap=ListedColormap(turbo_colormap_data),
vmin=0,
vmax=20,
alpha=0.5)
# Plot the hidden layer weights
def plot_hidden(weights):
# Single axes - var v. time
ax = fig.add_axes([0.05, 0.425, 0.9, 0.15])
# Axes ranges from data
ax.set_xlim(-0.6, len(weights) - 0.4)
ax.set_ylim(0, numpy.max(numpy.abs(weights)) * 1.05)
ax.bar(x=range(len(weights)),
height=numpy.abs(weights[order]),
color='grey',
tick_label=order)
# Get a 20CR data for the grid metadata
ic = twcr.load('prmsl', datetime.datetime(1969, 3, 12, 6), version='2c')
ic = ic.extract(iris.Constraint(member=1))
# Get the 9 neuron autoencoder
model_save_file = (("%s/Machine-Learning-experiments/" +
"simple_autoencoder_activations/elu/" +
"saved_models/Epoch_%04d")) % (os.getenv('SCRATCH'), 100)
autoencoder = tf.keras.models.load_model(model_save_file)
# Get the order of the hidden weights - most to least important
order = numpy.argsort(numpy.abs(autoencoder.get_weights()[1]))[::-1]
# Make a comparison plot - Input, hidden, and output weights
fig = Figure(
figsize=(10, 12), # Width, Height (inches)
dpi=100,
# Longitudes cover -180 to 180 with 159 values
lon_values = numpy.arange(-180, 181, 360 / 158)
longitude = iris.coords.DimCoord(lon_values,
standard_name='longitude',
units='degrees_east',
coord_system=cs)
dummy_data = numpy.zeros((len(lat_values), len(lon_values)))
dummy_cube = iris.cube.Cube(dummy_data,
dim_coords_and_dims=[(latitude, 0),
(longitude, 1)])
n_cube = cbe.regrid(dummy_cube, iris.analysis.Linear())
return (n_cube)
# Get the 20CR data
ic = twcr.load('prmsl', datetime.datetime(2009, 3, 12, 18), version='2c')
ic = rr_cube(ic.extract(iris.Constraint(member=1)))
# Get the autoencoder
model_save_file = ("%s/Machine-Learning-experiments/" +
"convolutional_autoencoder_perturbations/" +
"rotated+scaled/saved_models/Epoch_%04d") % (
os.getenv('SCRATCH'), 50)
autoencoder = tf.keras.models.load_model(model_save_file)
# Normalisation - Pa to mean=0, sd=1 - and back
def normalise(x):
x -= 101325
x /= 3000
return x
required=True)
args = parser.parse_args()
start = datetime.datetime(1902, 8, 1, 0) + datetime.timedelta(hours=args.hour)
end = datetime.datetime(1902, 8, 31, 23, 59)
opdir = "%s/simple_climatologies/20CRv3/August_1902" % os.getenv('SCRATCH')
if not os.path.isdir(opdir):
os.makedirs(opdir)
# Make the field average over the time
accum = None
current = start
count = 0
while current < end:
rdata = twcr.load(args.var, current, level=925, version=args.version)
rdata = rdata.collapsed('member', iris.analysis.MEAN)
if accum is None:
accum = rdata
else:
accum.data = accum.data + rdata.data
count = count + 1
current = current + datetime.timedelta(days=1)
# pickle the field mean
accum.data = accum.data / count
opfile = "%s/%s_925_%s.pkl" % (opdir, args.var, args.version)
fh = open(opfile, 'wb')
pickle.dump(accum, fh)
fh.close()
# China-centred projection
projection=ccrs.RotatedPole(pole_longitude=287.5, pole_latitude=55.5)
scale=25
extent=[scale*-1*aspect/3.0,scale*aspect/3.0,scale*-1,scale]
# On the left - spaghetti-contour plot of original 20CRv3
ax_left=fig.add_axes([0.005,0.01,0.323,0.98],projection=projection)
ax_left.set_axis_off()
ax_left.set_extent(extent, crs=projection)
ax_left.background_patch.set_facecolor((0.88,0.88,0.88,1))
mg.background.add_grid(ax_left)
land_img_left=ax_left.background_img(name='GreyT', resolution='low')
# 20CRv3 data
prmsl=twcr.load('PRMSL',dte,version='3')
# 20CRv3 data
obs_t=twcr.load_observations_fortime(dte,version='3')
# Plot the observations
mg.observations.plot(ax_left,obs_t,radius=0.2)
# PRMSL spaghetti plot
mg.pressure.plot(ax_left,prmsl,scale=0.01,type='spaghetti',
resolution=0.25,
levels=numpy.arange(875,1050,10),
colors='blue',
label=False,
linewidths=0.1)
import datetime
import argparse
import os
import math
import pickle
import Meteorographica as mg
import matplotlib
from matplotlib.backends.backend_agg import FigureCanvasAgg as FigureCanvas
from matplotlib.figure import Figure
import cartopy
import cartopy.crs as ccrs
# Get the 20CR data
source = twcr.load('prmsl', datetime.datetime(2009, 3, 12, 18), version='2c')
source = source.extract(iris.Constraint(member=1))
target = twcr.load('prmsl',
datetime.datetime(2009, 3, 12, 18) +
datetime.timedelta(hours=6),
version='2c')
target = target.extract(iris.Constraint(member=1))
target = target - source
# Need to resize data so it's dimensions are a multiple of 8 (3*2-fold pool)
class ResizeLayer(tf.keras.layers.Layer):
def __init__(self, newsize=None, **kwargs):
super(ResizeLayer, self).__init__(**kwargs)
self.resize_newsize = newsize
res = p.copy()
res.data -= 101325
res.data /= 3000
return res
def unnormalise_prmsl(p):
res = p.copy()
res.data *= 3000
res.data += 101325
return res
# Load the validation data
prmsl = twcr.load('prmsl',
datetime.datetime(args.year, args.month, args.day,
args.hour),
version='2c')
prmsl = tensor_cube(prmsl.extract(iris.Constraint(member=1)))
t2m = twcr.load('air.2m',
datetime.datetime(args.year, args.month, args.day, args.hour),
version='2c')
t2m = tensor_cube(t2m.extract(iris.Constraint(member=1)))
u10m = twcr.load('uwnd.10m',
datetime.datetime(args.year, args.month, args.day, args.hour),
version='2c')
u10m = tensor_cube(u10m.extract(iris.Constraint(member=1)))
v10m = twcr.load('vwnd.10m',
datetime.datetime(args.year, args.month, args.day, args.hour),
version='2c')
v10m = tensor_cube(v10m.extract(iris.Constraint(member=1)))
prmsl = prmsl.regrid(prmsl_pc, iris.analysis.Linear())
lats = prmsl.coord('latitude').points
lons = prmsl.coord('longitude').points
lons, lats = numpy.meshgrid(lons, lats)
CS = ax.contour(lons,
lats,
prmsl.data * 0.01,
colors='black',
linewidths=0.5,
alpha=1.0,
levels=numpy.arange(870, 1050, 10),
zorder=200)
# Load the validation data
prmsl = twcr.load('prmsl', datetime.datetime(2010, 3, 12, 18), version='2c')
prmsl = to_analysis_grid(prmsl.extract(iris.Constraint(member=1)))
t2m = twcr.load('air.2m', datetime.datetime(2010, 3, 12, 18), version='2c')
t2m = to_analysis_grid(t2m.extract(iris.Constraint(member=1)))
u10m = twcr.load('uwnd.10m', datetime.datetime(2010, 3, 12, 18), version='2c')
u10m = to_analysis_grid(u10m.extract(iris.Constraint(member=1)))
v10m = twcr.load('vwnd.10m', datetime.datetime(2010, 3, 12, 18), version='2c')
v10m = to_analysis_grid(v10m.extract(iris.Constraint(member=1)))
insol = to_analysis_grid(load_insolation(2010, 3, 12, 18))
# Convert the validation data into tensor format
t2m_t = tf.convert_to_tensor(normalise_t2m(t2m.data), numpy.float32)
t2m_t = tf.reshape(t2m_t, [79, 159, 1])
prmsl_t = tf.convert_to_tensor(normalise_prmsl(prmsl.data), numpy.float32)
prmsl_t = tf.reshape(prmsl_t, [79, 159, 1])
u10m_t = tf.convert_to_tensor(normalise_wind(u10m.data), numpy.float32)
# Longitudes cover -180 to 180 with 159 values
lon_values = numpy.arange(-180, 181, 360 / 158)
longitude = iris.coords.DimCoord(lon_values,
standard_name='longitude',
units='degrees_east',
coord_system=cs)
dummy_data = numpy.zeros((len(lat_values), len(lon_values)))
dummy_cube = iris.cube.Cube(dummy_data,
dim_coords_and_dims=[(latitude, 0),
(longitude, 1)])
n_cube = cbe.regrid(dummy_cube, iris.analysis.Linear())
return (n_cube)
# Get the 20CR data
ic = twcr.load('prate', datetime.datetime(2010, 3, 12, 18), version='2c')
ic = rr_cube(ic.extract(iris.Constraint(member=1)))
ic.data = ic.data * 1000 + 1.001
ic.data = numpy.log(ic.data)
# Get the autoencoder
model_save_file = ("%s/Machine-Learning-experiments/" +
"convolutional_autoencoder_perturbations/" +
"rotated+scaled_precip/saved_models/Epoch_%04d") % (
os.getenv('SCRATCH'), 50)
autoencoder = tf.keras.models.load_model(model_save_file)
fig = Figure(
figsize=(9.6, 10.8), # 1/2 HD
dpi=100,
facecolor=(0.88, 0.88, 0.88, 1),
# China-centred projection
projection = ccrs.RotatedPole(pole_longitude=287.5, pole_latitude=55.5)
scale = 25
extent = [scale * -1 * aspect / 3.0, scale * aspect / 3.0, scale * -1, scale]
# On the left - spaghetti-contour plot of original 20CRv3
ax_left = fig.add_axes([0.005, 0.01, 0.323, 0.98], projection=projection)
ax_left.set_axis_off()
ax_left.set_extent(extent, crs=projection)
ax_left.background_patch.set_facecolor((0.88, 0.88, 0.88, 1))
mg.background.add_grid(ax_left)
land_img_left = ax_left.background_img(name='GreyT', resolution='low')
# Scout 4.6.1 data
prmsl = twcr.load('prmsl', dte, version='4.6.1')
obs_t = twcr.load_observations_fortime(dte, version='4.6.1')
# Plot the observations
mg.observations.plot(ax_left, obs_t, radius=0.2)
# PRMSL spaghetti plot
mg.pressure.plot(ax_left,
prmsl,
scale=0.01,
type='spaghetti',
resolution=0.25,
levels=numpy.arange(875, 1050, 10),
colors='blue',
label=False,
linewidths=0.1)
parser.add_argument("--hour", help="Hour of day (0 to 23)",
type=int,required=True)
parser.add_argument("--member", help="Ensemble member",
default=1,type=int,required=False)
parser.add_argument("--version", help="20CR version",
default='2c',type=str,required=False)
parser.add_argument("--variable", help="20CR variable",
default='prmsl',type=str,required=False)
parser.add_argument("--epoch", help="Model at which epoch?",
type=int,required=True)
args = parser.parse_args()
# Get the 20CR data
ic=twcr.load(args.variable,datetime.datetime(args.year,args.month,
args.day,args.hour),
version=args.version)
ic=ic.extract(iris.Constraint(member=args.member))
# Get the autoencoder
model_save_file=("%s/Machine-Learning-experiments/deep_autoencoder/"+
"saved_models/Epoch_%04d") % (
os.getenv('SCRATCH'),args.epoch)
autoencoder=tf.keras.models.load_model(model_save_file)
# Normalisation - Pa to mean=0, sd=1 - and back
def normalise(x):
x -= 101325
x /= 3000
return x
# South America centred projection
projection = ccrs.RotatedPole(pole_longitude=120, pole_latitude=125)
scale = 25
extent = [scale * -1 * aspect / 3.0, scale * aspect / 3.0, scale * -1, scale]
# On the left - spaghetti-contour plot of original 20CRv3
ax_left = fig.add_axes([0.005, 0.01, 0.323, 0.98], projection=projection)
ax_left.set_axis_off()
ax_left.set_extent(extent, crs=projection)
ax_left.background_patch.set_facecolor((0.88, 0.88, 0.88, 1))
mg.background.add_grid(ax_left)
land_img_left = ax_left.background_img(name='GreyT', resolution='low')
# 20CRv3 data
prmsl = twcr.load('prmsl', dte, version='4.5.1')
obs_t = twcr.load_observations_fortime(dte, version='4.5.1')
# Plot the observations
mg.observations.plot(ax_left, obs_t, radius=0.2)
# PRMSL spaghetti plot
mg.pressure.plot(ax_left,
prmsl,
scale=0.01,
type='spaghetti',
resolution=0.25,
levels=numpy.arange(875, 1050, 10),
colors='blue',
label=False,
linewidths=0.1)
ax_one.background_patch.set_facecolor((0.88, 0.88, 0.88, 1))
ax_three.background_patch.set_facecolor((0.88, 0.88, 0.88, 1))
mg.background.add_grid(ax_one)
mg.background.add_grid(ax_three)
land_img_one = ax_one.background_img(name='GreyT', resolution='low')
land_img_three = ax_three.background_img(name='GreyT', resolution='low')
# Get the DWR observations for that afternoon
obs = DWR.load_observations('prmsl', dte - datetime.timedelta(hours=0.1),
dte + datetime.timedelta(hours=0.1))
# Reduce to Fort William only
obs_assimilate = obs[obs.name == 'FORTWILLIAM']
obs_assimilate.value = obs_assimilate.value * 100 # to Pa
# 20CRv3 data
prmsl = twcr.load('prmsl', dte, version='4.5.1')
# Get the observations used in 20CRv3
obs_t = twcr.load_observations_fortime(dte, version='4.5.1')
# Filter to those assimilated and near the UK
obs_s = obs_t.loc[((obs_t['Latitude'] > 0) & (obs_t['Latitude'] < 90)) & (
(obs_t['Longitude'] > 240) | (obs_t['Longitude'] < 100))].copy()
# Update mslp by assimilating Fort William ob.
prmsl2 = DIYA.constrain_cube(
prmsl,
lambda dte: twcr.load('prmsl', dte, version='4.5.1'),
obs=obs_assimilate,
obs_error=100,
random_state=RANDOM_SEED,
model=sklearn.linear_model.LinearRegression(),
lat_range=(20, 85),
longitude = iris.coords.DimCoord(lon_values,
standard_name='longitude',
units='degrees_east',
coord_system=cs)
dummy_data = numpy.zeros((len(lat_values), len(lon_values)))
dummy_cube = iris.cube.Cube(dummy_data,
dim_coords_and_dims=[(latitude, 0),
(longitude, 1)])
n_cube = cbe.regrid(dummy_cube, iris.analysis.Linear())
return (n_cube)
if args.source == '20CR2c':
ic = twcr.load(
args.variable,
datetime.datetime(args.year, args.month, args.day, args.hour) +
datetime.timedelta(hours=6),
version='2c')
ic = ic.extract(iris.Constraint(member=args.member))
ic = rr_cube(ic)
# Normalise to range 0-1 (approx)
if args.variable == 'uwnd.10m' or args.variable == 'vwnd.10m':
ic = normalise_wind(ic)
elif args.variable == 'air.2m':
ic = normalise_t2m(ic)
elif args.variable == 'prate':
ic = normalise_precip(ic)
elif args.variable == 'prmsl':
ic = normalise_prmsl(ic)
else:
type=float,
required=False)
parser.add_argument("--opdir", help="Directory for output files",
default="%s/images/20CRv2c_global_4var" % \
os.getenv('SCRATCH'),
type=str,required=False)
args = parser.parse_args()
if not os.path.isdir(args.opdir):
os.makedirs(args.opdir)
dte = datetime.datetime(args.year, args.month, args.day, int(args.hour),
int(args.hour % 1 * 60))
# Load the model data - dealing sensibly with missing fields
t2m = twcr.load('air.2m', dte, version='2c')
t2m = t2m.extract(iris.Constraint(member=1))
t2m = quantile_normalise_t2m(t2m)
u10m = twcr.load('uwnd.10m', dte, version='2c')
u10m = u10m.extract(iris.Constraint(member=1))
v10m = twcr.load('vwnd.10m', dte, version='2c')
v10m = v10m.extract(iris.Constraint(member=1))
prmsl = twcr.load('prmsl', dte, version='2c')
prmsl = prmsl.extract(iris.Constraint(member=1))
mask = iris.load_cube("%s/fixed_fields/land_mask/opfc_global_2019.nc" %
os.getenv('SCRATCH'))
# Define the figure (page size, background color, resolution, ...
fig = Figure(
# Assemble local copies of some data to be used in Meteorographica examples.
#
# Uses IRData (http://brohan.org/IRData/) to get the data.
import datetime
import iris
import IRData.twcr as twcr
import pickle
import gzip
dte = datetime.datetime(1987, 10, 16, 6)
for var in ('prmsl', 'uwnd.10m', 'vwnd.10m', 'prate'):
twcr.fetch(var, dte, version='2c')
cube = twcr.load(var, dte, version='2c')
fname = "20CR2c.%04d%02d%02d%02d.%s.nc" % (dte.year, dte.month, dte.day,
dte.hour, var)
#iris.save(cube,fname,netcdf_format='NETCDF4',
# zlib=True,complevel=9)
twcr.fetch_observations(dte, version='2c')
obs = twcr.load_observations_fortime(dte, version='2c')
f = gzip.open(
"20CR2c.%04d%02d%02d%02d.observations.pklz" %
(dte.year, dte.month, dte.day, dte.hour), "wb")
pickle.dump(obs, f)
f.close()
self.resize_newsize,
align_corners=True)
def get_config(self):
return {'newsize': self.resize_newsize}
year = 1916
month = 3
day = 12
hour = 6
# Get the 20CR data
#ic=twcr.load('prmsl',datetime.datetime(2009,3,12,18),
ic = twcr.load('prmsl',
datetime.datetime(year, month, day, hour),
version='2c')
ic = ic.extract(iris.Constraint(member=1))
#ic=ic.collapsed('member', iris.analysis.MEAN)
# Make the fake observations
obs = twcr.load_observations_fortime(datetime.datetime(1916, 3, 12, 6),
version='2c')
ensemble = []
for index, row in obs.iterrows():
ensemble.append(
ic.interpolate([('latitude', row['Latitude']),
('longitude', row['Longitude'])],
iris.analysis.Linear()).data.item())
ensemble = numpy.array(ensemble, dtype=numpy.float32)
ensemble = normalise(ensemble)
# South America centred projection
projection = ccrs.RotatedPole(pole_longitude=120, pole_latitude=125)
scale = 25
extent = [scale * -1 * aspect / 3.0, scale * aspect / 3.0, scale * -1, scale]
# On the left - spaghetti-contour plot of original 20CRv3
ax_left = fig.add_axes([0.005, 0.01, 0.323, 0.98], projection=projection)
ax_left.set_axis_off()
ax_left.set_extent(extent, crs=projection)
ax_left.background_patch.set_facecolor((0.88, 0.88, 0.88, 1))
mg.background.add_grid(ax_left)
land_img_left = ax_left.background_img(name='GreyT', resolution='low')
# 20CRv3 data
at = twcr.load('tmp', dte, level=925, version='4.5.1')
aat = at.copy()
at.data = at.data - 273.15
clim = pickle.load(
open(
"%s/simple_climatologies/20CRv3/June_1902/air.2m_4.5.1.pkl" %
os.getenv('SCRATCH'), "rb"))
for m in range(80):
aat.data[m, :, :] = aat.data[m, :, :] - clim.data
obs_t = twcr.load_observations_fortime(dte, version='4.5.1')
# Plot the observations
mg.observations.plot(ax_left, obs_t, radius=0.2)
# PRMSL spaghetti plot
mg.pressure.plot(ax_left,