def test_train_qdm(kind):
"""Test that train_qdm outputs store giving sdba.adjustment.QuantileDeltaMapping
Checks that output is consistent if we do "additive" or "multiplicative"
QDM kinds.
"""
# Setup input data.
n_years = 10
n = n_years * 365
model_bias = 2
ts = np.sin(np.linspace(-10 * 3.14, 10 * 3.14, n)) * 0.5
hist = _datafactory(ts + model_bias)
ref = _datafactory(ts)
output_key = "memory://test_train_qdm/test_output.zarr"
hist_key = "memory://test_train_qdm/hist.zarr"
ref_key = "memory://test_train_qdm/ref.zarr"
# Load up a fake repo with our input data in the place of big data and cloud
# storage.
repository.write(hist_key, hist)
repository.write(ref_key, ref)
train_qdm(
historical=hist_key,
reference=ref_key,
out=output_key,
variable="fakevariable",
kind=kind,
)
assert QuantileDeltaMapping.from_dataset(repository.read(output_key))
def train_qdm(historical,
reference,
out,
variable,
kind,
selslice=None,
iselslice=None):
"""Train Quantile Delta Mapping (QDM) model and output to storage"""
sel_slices_d = None
isel_slices_d = None
if selslice:
sel_slices_d = {}
for s in selslice:
k, v = s.split("=")
sel_slices_d[k] = slice(*map(str, v.split(",")))
if iselslice:
isel_slices_d = {}
for s in iselslice:
k, v = s.split("=")
isel_slices_d[k] = slice(*map(int, v.split(",")))
services.train_qdm(
historical=historical,
reference=reference,
out=out,
variable=variable,
kind=kind,
sel_slice=sel_slices_d,
isel_slice=isel_slices_d,
)
def test_apply_qdm():
"""Test to apply a trained QDM to input data and read the output.
This is an integration test between train_qdm, apply_qdm.
"""
# Setup input data.
target_variable = "fakevariable"
variable_kind = "additive"
n_histdays = 10 * 365 # 10 years of daily historical.
n_simdays = 50 * 365 # 50 years of daily simulation.
model_bias = 2
ts_ref = np.ones(n_histdays, dtype=np.float64)
ts_sim = np.ones(n_simdays, dtype=np.float64)
hist = _datafactory(ts_ref + model_bias, variable_name=target_variable)
ref = _datafactory(ts_ref, variable_name=target_variable)
sim = _datafactory(ts_sim + model_bias, variable_name=target_variable)
# Load up a fake repo with our input data in the place of big data and cloud
# storage.
qdm_key = "memory://test_apply_qdm/qdm.zarr"
hist_key = "memory://test_apply_qdm/hist.zarr"
ref_key = "memory://test_apply_qdm/ref.zarr"
sim_key = "memory://test_apply_qdm/sim.zarr"
sim_adj_key = "memory://test_apply_qdm/sim_adjusted.zarr"
repository.write(sim_key, sim)
repository.write(hist_key, hist)
repository.write(ref_key, ref)
target_years = [1994, 1995]
train_qdm(
historical=hist_key,
reference=ref_key,
out=qdm_key,
variable=target_variable,
kind=variable_kind,
)
apply_qdm(
simulation=sim_key,
qdm=qdm_key,
years=target_years,
variable=target_variable,
out=sim_adj_key,
)
adjusted_ds = repository.read(sim_adj_key)
assert target_variable in adjusted_ds.variables
def test_train_qdm_isel_slice():
"""Test that train_qdm outputs subset data when passed isel_slice"""
# Setup input data.
n_years = 10
n = n_years * 365
# Lazy way to make fake data for 2 latitudes...
model_bias = 2
ts = np.sin(np.linspace(-10 * 3.14, 10 * 3.14, n)) * 0.5
hist1 = _datafactory(ts + model_bias)
hist2 = _datafactory(ts + model_bias).assign_coords(
{"lat": hist1["lat"].data + 1.0}
)
hist = xr.concat([hist1, hist2], dim="lat")
ref1 = _datafactory(ts)
ref2 = _datafactory(ts + model_bias).assign_coords({"lat": ref1["lat"].data + 1.0})
ref = xr.concat([ref1, ref2], dim="lat")
output_key = "memory://test_train_qdm_isel_slice/test_output.zarr"
hist_key = "memory://test_train_qdm_isel_slice/hist.zarr"
ref_key = "memory://test_train_qdm_isel_slice/ref.zarr"
repository.write(hist_key, hist)
repository.write(ref_key, ref)
train_qdm(
historical=hist_key,
reference=ref_key,
out=output_key,
variable="fakevariable",
kind="additive",
isel_slice={"lat": slice(0, 1)}, # select only 1 of 2 lats by idx...
)
# Check we can read output and it's the selected value, only.
ds_result = repository.read(output_key)
np.testing.assert_equal(ds_result["lat"].data, ref["lat"].data[0])
assert QuantileDeltaMapping.from_dataset(ds_result)
def test_prime_qdm_regional_apply():
"""
Integration test checking that prime_qdm_output_zarrstore and apply_qdm can write regionally.
The strategy is to create input data for two latitudes and run two QDMs
(train + apply). One doing a "vanilla", global QDM. The other using a
"regional" strategy: training and applying QDM on each latitude and then
writing each to the same, primed zarr store. We then compare output from
the vanilla and regional approaches.
"""
# Setup input data.
target_variable = "fakevariable"
variable_kind = "additive"
n_histdays = 10 * 365 # 10 years of daily historical.
n_simdays = 50 * 365 # 50 years of daily simulation.
model_bias = 2
ts_ref = np.ones(n_histdays, dtype=np.float64)
ts_sim = np.ones(n_simdays, dtype=np.float64)
hist = _datafactory(ts_ref + model_bias, variable_name=target_variable)
ref = _datafactory(ts_ref, variable_name=target_variable)
sim = _datafactory(ts_sim + model_bias, variable_name=target_variable)
# Append a copy of the data onto a new latitude of "2.0". I'm too lazy to
# modify the data factories to get this. Gives us a way to test regional
# writes.
sim = xr.concat([sim, sim.assign({"lat": np.array([2.0])})], dim="lat")
sim[target_variable][
:, :, -1
] += 1 # Introducing a slight difference for different lat.
ref = xr.concat([ref, ref.assign({"lat": np.array([2.0])})], dim="lat")
hist = xr.concat([hist, hist.assign({"lat": np.array([2.0])})], dim="lat")
# Datafactory appends cruft "index" coordinate. We're removing it because we
# dont need it and I'm too lazy to tinker with input data fixtures.
hist = hist.drop_vars("index")
ref = ref.drop_vars("index")
sim = sim.drop_vars("index")
# Load up a fake repo with our input data in the place of big data and cloud
# storage.
qdm_key = "memory://test_apply_qdm/qdm_global.zarr"
qdm_region1_key = "memory://test_apply_qdm/qdm_region1.zarr"
qdm_region2_key = "memory://test_apply_qdm/qdm_region2.zarr"
hist_key = "memory://test_apply_qdm/hist.zarr"
ref_key = "memory://test_apply_qdm/ref.zarr"
sim_key = "memory://test_apply_qdm/sim.zarr"
primed_url = "memory://test_prime_qdm_output_zarrstore/primed.zarr"
sim_adj_key = "memory://test_apply_qdm/sim_adjusted.zarr"
repository.write(sim_key, sim)
repository.write(hist_key, hist)
repository.write(ref_key, ref)
target_years = [1994, 1995]
# Lets prime a QDM output.
prime_qdm_output_zarrstore(
simulation=sim_key,
variable=target_variable,
years=target_years,
out=primed_url,
zarr_region_dims=["lat"],
)
# Now train, apply QDM for two cases. One with region write to primed
# zarr and one without.
# Writing to regions
region_1 = {"lat": slice(0, 1)}
train_qdm(
historical=hist_key,
reference=ref_key,
out=qdm_region1_key,
variable=target_variable,
kind=variable_kind,
isel_slice=region_1,
)
apply_qdm(
simulation=sim_key,
qdm=qdm_region1_key,
years=target_years,
variable=target_variable,
out=primed_url,
isel_slice=region_1,
out_zarr_region=region_1,
)
region_2 = {"lat": slice(1, 2)}
train_qdm(
historical=hist_key,
reference=ref_key,
out=qdm_region2_key,
variable=target_variable,
kind=variable_kind,
isel_slice=region_2,
)
apply_qdm(
simulation=sim_key,
qdm=qdm_region2_key,
years=target_years,
variable=target_variable,
out=primed_url,
isel_slice=region_2,
out_zarr_region=region_2,
)
primed_adjusted_ds = repository.read(primed_url)
# Doing it globally, all "regions" at once.
train_qdm(
historical=hist_key,
reference=ref_key,
out=qdm_key,
variable=target_variable,
kind=variable_kind,
)
apply_qdm(
simulation=sim_key,
qdm=qdm_key,
years=target_years,
variable=target_variable,
out=sim_adj_key,
)
adjusted_ds = repository.read(sim_adj_key)
# Desired variables present?
xr.testing.assert_allclose(primed_adjusted_ds, adjusted_ds)
def test_prime_qdm_output_zarrstore():
"""
Test that prime_qdm_output_zarrstore creates a Zarr with variables, shapes, attrs.
We're testing this by running QDM (train + apply) in it's usualy mode and
then using comparable parameters to prime a Zarr Store. We then compare
the two.
"""
# Setup input data.
quantile_variable = "sim_q"
target_variable = "fakevariable"
variable_kind = "additive"
n_histdays = 10 * 365 # 10 years of daily historical.
n_simdays = 50 * 365 # 50 years of daily simulation.
model_bias = 2
ts_ref = np.ones(n_histdays, dtype=np.float64)
ts_sim = np.ones(n_simdays, dtype=np.float64)
hist = _datafactory(ts_ref + model_bias, variable_name=target_variable)
ref = _datafactory(ts_ref, variable_name=target_variable)
sim = _datafactory(ts_sim + model_bias, variable_name=target_variable)
# Load up a fake repo with our input data in the place of big data and cloud
# storage.
qdm_key = "memory://test_prime_qdm_output_zarrstore/qdm.zarr"
hist_key = "memory://test_prime_qdm_output_zarrstore/hist.zarr"
ref_key = "memory://test_prime_qdm_output_zarrstore/ref.zarr"
sim_key = "memory://test_prime_qdm_output_zarrstore/sim.zarr"
sim_adj_key = "memory://test_prime_qdm_output_zarrstore/sim_adjusted.zarr"
primed_url = "memory://test_prime_qdm_output_zarrstore/primed.zarr"
repository.write(sim_key, sim)
repository.write(hist_key, hist)
repository.write(ref_key, ref)
target_year = 1995
# Lets prime a QDM output.
prime_qdm_output_zarrstore(
simulation=sim_key,
variable=target_variable,
years=[target_year],
out=primed_url,
zarr_region_dims=["lat"],
)
primed_ds = repository.read(primed_url)
# Now train, apply actual QDM and compare outputs with primed Zarr Store
train_qdm(
historical=hist_key,
reference=ref_key,
out=qdm_key,
variable=target_variable,
kind=variable_kind,
)
apply_qdm(
simulation=sim_key,
qdm=qdm_key,
years=[target_year],
variable=target_variable,
out=sim_adj_key,
)
adjusted_ds = repository.read(sim_adj_key)
# Desired variables present?
assert (
quantile_variable in primed_ds.variables
and target_variable in primed_ds.variables
)
# Desired shapes with dims in correct order?
assert primed_ds[quantile_variable].shape == primed_ds[target_variable].shape
assert primed_ds[target_variable].shape == adjusted_ds[target_variable].shape
# Output attrs matching for root and variables?
assert primed_ds.attrs == adjusted_ds.attrs
assert primed_ds[target_variable].attrs == adjusted_ds[target_variable].attrs
assert primed_ds[quantile_variable].attrs == adjusted_ds[quantile_variable].attrs
def test_qplad_integration(kind):
"""Integration test of the QDM and QPLAD services"""
lon = [-99.83, -99.32, -99.79, -99.23]
lat = [42.25, 42.21, 42.63, 42.59]
time = xr.cftime_range(start="1994-12-17", end="2015-01-15", calendar="noleap")
data_ref = 15 + 8 * np.random.randn(len(time), 4, 4)
data_train = 15 + 8 * np.random.randn(len(time), 4, 4)
variable = "scen"
ref_fine = xr.Dataset(
data_vars=dict(
scen=(["time", "lat", "lon"], data_ref),
),
coords=dict(
time=time,
lon=(["lon"], lon),
lat=(["lat"], lat),
),
attrs=dict(description="Weather related data."),
)
ds_train = xr.Dataset(
data_vars=dict(
scen=(["time", "lat", "lon"], data_train),
),
coords=dict(
time=time,
lon=(["lon"], lon),
lat=(["lat"], lat),
),
attrs=dict(description="Weather related data."),
)
# take the mean across space to represent coarse reference data for AFs
ds_ref_coarse = ref_fine.mean(["lat", "lon"])
ds_train = ds_train.mean(["lat", "lon"])
# tile the fine resolution grid with the coarse resolution ref data
ref_coarse = ds_ref_coarse.broadcast_like(ref_fine)
ds_bc = ds_train + 3
# need to set variable units to pass xclim 0.29 check on units
ds_train["scen"].attrs["units"] = "K"
ds_bc["scen"].attrs["units"] = "K"
ref_coarse["scen"].attrs["units"] = "K"
ref_fine["scen"].attrs["units"] = "K"
ds_ref_coarse["scen"].attrs["units"] = "K"
# write test data
ref_coarse_coarse_url = (
"memory://test_qplad_downscaling/a/ref_coarse_coarse/path.zarr"
)
ref_coarse_url = "memory://test_qplad_downscaling/a/ref_coarse/path.zarr"
ref_fine_url = "memory://test_qplad_downscaling/a/ref_fine/path.zarr"
qdm_train_url = "memory://test_qplad_downscaling/a/qdm_train/path.zarr"
sim_url = "memory://test_qplad_downscaling/a/sim/path.zarr"
qdm_train_out_url = "memory://test_qplad_downscaling/a/qdm_train_out/path.zarr"
biascorrected_url = "memory://test_qplad_downscaling/a/biascorrected/path.zarr"
sim_biascorrected_key = (
"memory://test_qplad_downscaling/a/biascorrected/sim_biascorrected.zarr"
)
repository.write(ref_coarse_coarse_url, ds_ref_coarse)
repository.write(
ref_coarse_url,
ref_coarse.chunk({"time": -1, "lat": -1, "lon": -1}),
)
repository.write(
ref_fine_url,
ref_fine.chunk({"time": -1, "lat": -1, "lon": -1}),
)
repository.write(qdm_train_url, ds_train)
repository.write(sim_url, ds_bc)
# this is an integration test between QDM and QPLAD, so use QDM services
# for bias correction
target_year = 2005
train_qdm(
historical=qdm_train_url,
reference=ref_coarse_coarse_url,
out=qdm_train_out_url,
variable=variable,
kind=kind,
)
apply_qdm(
simulation=sim_url,
qdm=qdm_train_out_url,
years=[target_year],
variable=variable,
out=sim_biascorrected_key,
)
biascorrected_coarse = repository.read(sim_biascorrected_key)
# make bias corrected data on the fine resolution grid
biascorrected_fine = biascorrected_coarse.broadcast_like(
ref_fine.sel(
time=slice("{}-01-01".format(target_year), "{}-12-31".format(target_year))
)
)
repository.write(
biascorrected_url,
biascorrected_fine.chunk({"time": -1, "lat": -1, "lon": -1}),
)
# write test data
qplad_afs_url = "memory://test_qplad_downscaling/a/qplad_afs/path.zarr"
# Writes NC to local disk, so diff format here:
sim_downscaled_url = "memory://test_qplad_downscaling/a/qplad_afs/downscaled.zarr"
# now train QPLAD model
train_qplad(ref_coarse_url, ref_fine_url, qplad_afs_url, variable, kind)
# downscale
apply_qplad(biascorrected_url, qplad_afs_url, variable, sim_downscaled_url)
# check output
downscaled_ds = repository.read(sim_downscaled_url)
# check that downscaled average equals bias corrected value
bc_timestep = biascorrected_fine[variable].isel(time=100).values[0][0]
qplad_downscaled_mean = downscaled_ds[variable].isel(time=100).mean().values
np.testing.assert_almost_equal(bc_timestep, qplad_downscaled_mean)