def test_invert_and_run(self):
from oggm.core.models import flowline, massbalance
glen_a = cfg.A * 2
gdir = utils.GlacierDirectory(self.rgin, base_dir=self.testdir)
gis.glacier_masks(gdir)
centerlines.compute_centerlines(gdir)
centerlines.compute_downstream_lines(gdir)
geometry.initialize_flowlines(gdir)
geometry.catchment_area(gdir)
geometry.catchment_width_geom(gdir)
geometry.catchment_width_correction(gdir)
climate.local_mustar_apparent_mb(gdir, tstar=1975, bias=0.)
inversion.prepare_for_inversion(gdir)
v, a = inversion.invert_parabolic_bed(gdir, glen_a=glen_a)
cfg.PARAMS['bed_shape'] = 'parabolic'
flowline.init_present_time_glacier(gdir)
mb_mod = massbalance.TstarMassBalanceModel(gdir)
fls = gdir.read_pickle('model_flowlines')
model = flowline.FluxBasedModel(fls,
mb_model=mb_mod,
y0=0.,
fs=0,
glen_a=glen_a)
ref_vol = model.volume_m3
model.run_until_equilibrium()
after_vol = model.volume_m3
np.testing.assert_allclose(ref_vol, after_vol, rtol=0.1)
def to_optimize(x):
# For backwards compat
_fd = 1.9e-24 * x[0]
glen_a = (cfg.N + 2) * _fd / 2.0
fs = 5.7e-20 * x[1]
v, _ = inversion.invert_parabolic_bed(gdir, fs=fs, glen_a=glen_a)
return (v - ref_v) ** 2
def test_invert_and_run(self):
from oggm.core.models import flowline, massbalance
glen_a = cfg.A * 2
gdir = utils.GlacierDirectory(self.rgin, base_dir=self.testdir)
gis.glacier_masks(gdir)
centerlines.compute_centerlines(gdir)
centerlines.compute_downstream_lines(gdir)
geometry.initialize_flowlines(gdir)
geometry.catchment_area(gdir)
geometry.catchment_width_geom(gdir)
geometry.catchment_width_correction(gdir)
climate.local_mustar_apparent_mb(gdir, tstar=1975, bias=0.0, prcp_fac=1)
inversion.prepare_for_inversion(gdir)
v, a = inversion.invert_parabolic_bed(gdir, glen_a=glen_a)
cfg.PARAMS["bed_shape"] = "parabolic"
flowline.init_present_time_glacier(gdir)
mb_mod = massbalance.TstarMassBalanceModel(gdir)
fls = gdir.read_pickle("model_flowlines")
model = flowline.FluxBasedModel(fls, mb_model=mb_mod, y0=0.0, fs=0, glen_a=glen_a)
ref_vol = model.volume_m3
model.run_until_equilibrium()
after_vol = model.volume_m3
np.testing.assert_allclose(ref_vol, after_vol, rtol=0.1)
def to_optimize(x):
tmp_ = np.zeros(len(ref_gdirs))
glen_a = cfg.A * x[0]
for i, gdir in enumerate(ref_gdirs):
v, a = invert_parabolic_bed(gdir, glen_a=glen_a, fs=0.0, write=False)
tmp_[i] = v / a
return utils.rmsd(tmp_, ref_thickness_m)
def to_optimize(x):
tmp_ = np.zeros(len(ref_gdirs))
glen_a = cfg.A * x[0]
for i, gdir in enumerate(ref_gdirs):
v, a = invert_parabolic_bed(gdir, glen_a=glen_a,
fs=0., write=False)
tmp_[i] = v / a
return utils.rmsd(tmp_, ref_thickness_m)
def to_optimize(x):
# For backwards compat
_fd = 1.9e-24 * x[0]
glen_a = (cfg.N+2) * _fd / 2.
fs = 5.7e-20 * x[1]
v, _ = inversion.invert_parabolic_bed(gdir, fs=fs,
glen_a=glen_a)
return (v - ref_v)**2
def to_optimize(x):
tmp_vols = np.zeros(len(ref_gdirs))
glen_a = cfg.A * x[0]
for i, gdir in enumerate(ref_gdirs):
v, _ = invert_parabolic_bed(gdir, glen_a=glen_a,
fs=0., write=False)
tmp_vols[i] = v * 1e-9
return utils.rmsd(tmp_vols, ref_volume_km3)
def test_ideal_glacier(self):
# we are making a
glen_a = cfg.A * 1
from oggm.core.models import flowline, massbalance
gdir = utils.GlacierDirectory(self.rgin, base_dir=self.testdir)
fls = self._parabolic_bed()
mbmod = massbalance.ConstantBalanceModel(2800.)
model = flowline.FluxBasedModel(fls, mb_model=mbmod, glen_a=glen_a)
model.run_until_equilibrium()
# from dummy bed
map_dx = 100.
towrite = []
for fl in model.fls:
# Distance between two points
dx = fl.dx * map_dx
# Widths
widths = fl.widths * map_dx
# Heights
hgt = fl.surface_h
# Flux
mb = mbmod.get_mb(hgt) * cfg.SEC_IN_YEAR * cfg.RHO
fl.flux = np.zeros(len(fl.surface_h))
fl.set_apparent_mb(mb)
flux = fl.flux * (map_dx**2) / cfg.SEC_IN_YEAR / cfg.RHO
pok = np.nonzero(widths > 10.)
widths = widths[pok]
hgt = hgt[pok]
flux = flux[pok]
angle = np.arctan(-np.gradient(hgt, dx)) # beware the minus sign
# Clip flux to 0
assert not np.any(flux < -0.1)
# add to output
cl_dic = dict(dx=dx,
flux=flux,
width=widths,
hgt=hgt,
slope_angle=angle,
is_last=True)
towrite.append(cl_dic)
# Write out
gdir.write_pickle(towrite, 'inversion_input', div_id=1)
v, a = inversion.invert_parabolic_bed(gdir, glen_a=glen_a)
v_km3 = v * 1e-9
a_km2 = np.sum(widths * dx) * 1e-6
v_vas = 0.034 * (a_km2**1.375)
np.testing.assert_allclose(v, model.volume_m3, rtol=0.01)
cl = gdir.read_pickle('inversion_output', div_id=1)[0]
assert utils.rmsd(cl['thick'],
model.fls[0].thick[:len(cl['thick'])]) < 10.
def test_distribute(self):
hef_file = get_demo_file("Hintereisferner.shp")
entity = gpd.GeoDataFrame.from_file(hef_file).iloc[0]
gdir = oggm.GlacierDirectory(entity, base_dir=self.testdir)
gis.define_glacier_region(gdir, entity=entity)
gis.glacier_masks(gdir)
centerlines.compute_centerlines(gdir)
geometry.initialize_flowlines(gdir)
geometry.catchment_area(gdir)
geometry.catchment_width_geom(gdir)
geometry.catchment_width_correction(gdir)
climate.process_histalp_nonparallel([gdir])
climate.mu_candidates(gdir, div_id=0)
hef_file = get_demo_file("mbdata_RGI40-11.00897.csv")
mbdf = pd.read_csv(hef_file).set_index("YEAR")
t_star, bias, prcp_fac = climate.t_star_from_refmb(gdir, mbdf["ANNUAL_BALANCE"])
t_star = t_star[-1]
bias = bias[-1]
climate.local_mustar_apparent_mb(gdir, tstar=t_star, bias=bias, prcp_fac=prcp_fac)
# OK. Values from Fischer and Kuhn 2013
# Area: 8.55
# meanH = 67+-7
# Volume = 0.573+-0.063
# maxH = 242+-13
inversion.prepare_for_inversion(gdir)
ref_v = 0.573 * 1e9
def to_optimize(x):
glen_a = cfg.A * x[0]
fs = cfg.FS * x[1]
v, _ = inversion.invert_parabolic_bed(gdir, fs=fs, glen_a=glen_a)
return (v - ref_v) ** 2
import scipy.optimize as optimization
out = optimization.minimize(to_optimize, [1, 1], bounds=((0.01, 10), (0.01, 10)), tol=1e-1)["x"]
glen_a = cfg.A * out[0]
fs = cfg.FS * out[1]
v, _ = inversion.invert_parabolic_bed(gdir, fs=fs, glen_a=glen_a, write=True)
np.testing.assert_allclose(ref_v, v)
inversion.distribute_thickness(gdir, how="per_altitude", add_nc_name=True)
inversion.distribute_thickness(gdir, how="per_interpolation", add_slope=False, add_nc_name=True)
grids_file = gdir.get_filepath("gridded_data")
with netCDF4.Dataset(grids_file) as nc:
t1 = nc.variables["thickness_per_altitude"][:]
t2 = nc.variables["thickness_per_interpolation"][:]
np.testing.assert_allclose(np.sum(t1), np.sum(t2))
if not HAS_NEW_GDAL:
np.testing.assert_allclose(np.max(t1), np.max(t2), atol=30)
def test_ideal_glacier(self):
# we are making a
glen_a = cfg.A * 1
from oggm.core.models import flowline, massbalance
gdir = utils.GlacierDirectory(self.rgin, base_dir=self.testdir)
fls = self._parabolic_bed()
mbmod = massbalance.ConstantBalanceModel(2800.)
model = flowline.FluxBasedModel(fls, mb_model=mbmod, glen_a=glen_a)
model.run_until_equilibrium()
# from dummy bed
map_dx = 100.
towrite = []
for fl in model.fls:
# Distance between two points
dx = fl.dx * map_dx
# Widths
widths = fl.widths * map_dx
# Heights
hgt = fl.surface_h
# Flux
mb = mbmod.get_mb(hgt) * cfg.SEC_IN_YEAR * cfg.RHO
fl.flux = np.zeros(len(fl.surface_h))
fl.set_apparent_mb(mb)
flux = fl.flux * (map_dx**2) / cfg.SEC_IN_YEAR / cfg.RHO
pok = np.nonzero(widths > 10.)
widths = widths[pok]
hgt = hgt[pok]
flux = flux[pok]
angle = np.arctan(-np.gradient(hgt, dx)) # beware the minus sign
# Clip flux to 0
assert not np.any(flux < -0.1)
# add to output
cl_dic = dict(dx=dx, flux=flux, width=widths, hgt=hgt,
slope_angle=angle, is_last=True)
towrite.append(cl_dic)
# Write out
gdir.write_pickle(towrite, 'inversion_input', div_id=1)
v, a = inversion.invert_parabolic_bed(gdir, glen_a=glen_a)
v_km3 = v * 1e-9
a_km2 = np.sum(widths * dx) * 1e-6
v_vas = 0.034*(a_km2**1.375)
np.testing.assert_allclose(v, model.volume_m3, rtol=0.01)
cl = gdir.read_pickle('inversion_output', div_id=1)[0]
assert utils.rmsd(cl['thick'], model.fls[0].thick[:len(cl['thick'])]) < 10.
def to_optimize(x):
glen_a = cfg.A * x[0]
fs = 0.
v, _ = inversion.invert_parabolic_bed(gdir, fs=fs, glen_a=glen_a)
return (v - ref_v)**2
def test_invert_hef_nofs(self):
hef_file = get_demo_file('Hintereisferner.shp')
rgidf = gpd.GeoDataFrame.from_file(hef_file)
# loop because for some reason indexing wont work
for index, entity in rgidf.iterrows():
gdir = oggm.GlacierDirectory(entity, base_dir=self.testdir)
gis.define_glacier_region(gdir, entity=entity)
gis.glacier_masks(gdir)
centerlines.compute_centerlines(gdir)
geometry.initialize_flowlines(gdir)
geometry.catchment_area(gdir)
geometry.catchment_width_geom(gdir)
geometry.catchment_width_correction(gdir)
climate.distribute_climate_data([gdir])
climate.mu_candidates(gdir, div_id=0)
hef_file = get_demo_file('mbdata_RGI40-11.00897.csv')
mbdf = pd.read_csv(hef_file).set_index('YEAR')
t_star, bias = climate.t_star_from_refmb(gdir, mbdf['ANNUAL_BALANCE'])
t_star = t_star[-1]
bias = bias[-1]
climate.local_mustar_apparent_mb(gdir, tstar=t_star, bias=bias)
# OK. Values from Fischer and Kuhn 2013
# Area: 8.55
# meanH = 67+-7
# Volume = 0.573+-0.063
# maxH = 242+-13
inversion.prepare_for_inversion(gdir)
ref_v = 0.573 * 1e9
def to_optimize(x):
glen_a = cfg.A * x[0]
fs = 0.
v, _ = inversion.invert_parabolic_bed(gdir, fs=fs, glen_a=glen_a)
return (v - ref_v)**2
import scipy.optimize as optimization
out = optimization.minimize(to_optimize, [1],
bounds=((0.00001, 100000), ),
tol=1e-4)['x']
self.assertTrue(out[0] > 0.1)
self.assertTrue(out[0] < 10)
glen_a = cfg.A * out[0]
fs = 0.
v, _ = inversion.invert_parabolic_bed(gdir,
fs=fs,
glen_a=glen_a,
write=True)
np.testing.assert_allclose(ref_v, v)
lens = [
len(gdir.read_pickle('centerlines', div_id=i)) for i in [1, 2, 3]
]
pid = np.argmax(lens) + 1
cls = gdir.read_pickle('inversion_output', div_id=pid)
fls = gdir.read_pickle('inversion_flowlines', div_id=pid)
maxs = 0.
for cl, fl in zip(cls, fls):
thick = cl['thick']
_max = np.max(thick)
if _max > maxs:
maxs = _max
atol = 30 if HAS_NEW_GDAL else 10
np.testing.assert_allclose(242, maxs, atol=atol)
# check that its not tooo sensitive to the dx
cfg.PARAMS['flowline_dx'] = 1.
geometry.initialize_flowlines(gdir)
geometry.catchment_area(gdir)
geometry.catchment_width_geom(gdir)
geometry.catchment_width_correction(gdir)
climate.distribute_climate_data([gdir])
climate.mu_candidates(gdir, div_id=0)
hef_file = get_demo_file('mbdata_RGI40-11.00897.csv')
mbdf = pd.read_csv(hef_file).set_index('YEAR')
t_star, bias = climate.t_star_from_refmb(gdir, mbdf['ANNUAL_BALANCE'])
t_star = t_star[-1]
bias = bias[-1]
climate.local_mustar_apparent_mb(gdir, tstar=t_star, bias=bias)
inversion.prepare_for_inversion(gdir)
v, _ = inversion.invert_parabolic_bed(gdir,
fs=fs,
glen_a=glen_a,
write=True)
np.testing.assert_allclose(ref_v, v, rtol=0.02)
cls = gdir.read_pickle('inversion_output', div_id=pid)
maxs = 0.
for cl in cls:
thick = cl['thick']
_max = np.max(thick)
if _max > maxs:
maxs = _max
np.testing.assert_allclose(242, maxs, atol=atol)
def test_invert_hef(self):
hef_file = get_demo_file('Hintereisferner.shp')
rgidf = gpd.GeoDataFrame.from_file(hef_file)
# loop because for some reason indexing wont work
for index, entity in rgidf.iterrows():
gdir = oggm.GlacierDirectory(entity, base_dir=self.testdir)
gis.define_glacier_region(gdir, entity=entity)
gis.glacier_masks(gdir)
centerlines.compute_centerlines(gdir)
geometry.initialize_flowlines(gdir)
geometry.catchment_area(gdir)
geometry.catchment_width_geom(gdir)
geometry.catchment_width_correction(gdir)
climate.distribute_climate_data([gdir])
climate.mu_candidates(gdir, div_id=0)
hef_file = get_demo_file('mbdata_RGI40-11.00897.csv')
mbdf = pd.read_csv(hef_file).set_index('YEAR')
t_star, bias = climate.t_star_from_refmb(gdir, mbdf['ANNUAL_BALANCE'])
t_star = t_star[-1]
bias = bias[-1]
climate.local_mustar_apparent_mb(gdir, tstar=t_star, bias=bias)
# OK. Values from Fischer and Kuhn 2013
# Area: 8.55
# meanH = 67+-7
# Volume = 0.573+-0.063
# maxH = 242+-13
inversion.prepare_for_inversion(gdir)
lens = [
len(gdir.read_pickle('centerlines', div_id=i)) for i in [1, 2, 3]
]
pid = np.argmax(lens) + 1
# Check how many clips:
cls = gdir.read_pickle('inversion_input', div_id=pid)
nabove = 0
maxs = 0.
npoints = 0.
for cl in cls:
# Clip slope to avoid negative and small slopes
slope = cl['slope_angle']
nm = np.where(slope < np.deg2rad(2.))
nabove += len(nm[0])
npoints += len(slope)
_max = np.max(slope)
if _max > maxs:
maxs = _max
self.assertTrue(nabove == 0)
self.assertTrue(np.rad2deg(maxs) < 40.)
ref_v = 0.573 * 1e9
def to_optimize(x):
glen_a = cfg.A * x[0]
fs = cfg.FS * x[1]
v, _ = inversion.invert_parabolic_bed(gdir, fs=fs, glen_a=glen_a)
return (v - ref_v)**2
import scipy.optimize as optimization
out = optimization.minimize(to_optimize, [1, 1],
bounds=((0.01, 10), (0.01, 10)),
tol=1e-4)['x']
self.assertTrue(out[0] > 0.1)
self.assertTrue(out[1] > 0.1)
self.assertTrue(out[0] < 1.1)
self.assertTrue(out[1] < 1.1)
glen_a = cfg.A * out[0]
fs = cfg.FS * out[1]
v, _ = inversion.invert_parabolic_bed(gdir,
fs=fs,
glen_a=glen_a,
write=True)
np.testing.assert_allclose(ref_v, v)
lens = [
len(gdir.read_pickle('centerlines', div_id=i)) for i in [1, 2, 3]
]
pid = np.argmax(lens) + 1
cls = gdir.read_pickle('inversion_output', div_id=pid)
fls = gdir.read_pickle('inversion_flowlines', div_id=pid)
maxs = 0.
for cl, fl in zip(cls, fls):
thick = cl['thick']
_max = np.max(thick)
if _max > maxs:
maxs = _max
np.testing.assert_allclose(242, maxs, atol=21)
def to_optimize(x):
glen_a = cfg.A * x[0]
fs = cfg.FS * x[1]
v, _ = inversion.invert_parabolic_bed(gdir, fs=fs, glen_a=glen_a)
return (v - ref_v) ** 2
def test_invert_hef(self):
hef_file = get_demo_file("Hintereisferner.shp")
entity = gpd.GeoDataFrame.from_file(hef_file).iloc[0]
gdir = oggm.GlacierDirectory(entity, base_dir=self.testdir)
gis.define_glacier_region(gdir, entity=entity)
gis.glacier_masks(gdir)
centerlines.compute_centerlines(gdir)
geometry.initialize_flowlines(gdir)
geometry.catchment_area(gdir)
geometry.catchment_width_geom(gdir)
geometry.catchment_width_correction(gdir)
climate.process_histalp_nonparallel([gdir])
climate.mu_candidates(gdir, div_id=0)
hef_file = get_demo_file("mbdata_RGI40-11.00897.csv")
mbdf = pd.read_csv(hef_file).set_index("YEAR")
t_star, bias, prcp_fac = climate.t_star_from_refmb(gdir, mbdf["ANNUAL_BALANCE"])
t_star = t_star[-1]
bias = bias[-1]
climate.local_mustar_apparent_mb(gdir, tstar=t_star, bias=bias, prcp_fac=prcp_fac)
# OK. Values from Fischer and Kuhn 2013
# Area: 8.55
# meanH = 67+-7
# Volume = 0.573+-0.063
# maxH = 242+-13
inversion.prepare_for_inversion(gdir)
lens = [len(gdir.read_pickle("centerlines", div_id=i)) for i in [1, 2, 3]]
pid = np.argmax(lens) + 1
# Check how many clips:
cls = gdir.read_pickle("inversion_input", div_id=pid)
nabove = 0
maxs = 0.0
npoints = 0.0
for cl in cls:
# Clip slope to avoid negative and small slopes
slope = cl["slope_angle"]
nm = np.where(slope < np.deg2rad(2.0))
nabove += len(nm[0])
npoints += len(slope)
_max = np.max(slope)
if _max > maxs:
maxs = _max
self.assertTrue(nabove == 0)
self.assertTrue(np.rad2deg(maxs) < 40.0)
ref_v = 0.573 * 1e9
def to_optimize(x):
glen_a = cfg.A * x[0]
fs = cfg.FS * x[1]
v, _ = inversion.invert_parabolic_bed(gdir, fs=fs, glen_a=glen_a)
return (v - ref_v) ** 2
import scipy.optimize as optimization
out = optimization.minimize(to_optimize, [1, 1], bounds=((0.01, 10), (0.01, 10)), tol=1e-4)["x"]
self.assertTrue(out[0] > 0.1)
self.assertTrue(out[1] > 0.1)
self.assertTrue(out[0] < 1.1)
self.assertTrue(out[1] < 1.1)
glen_a = cfg.A * out[0]
fs = cfg.FS * out[1]
v, _ = inversion.invert_parabolic_bed(gdir, fs=fs, glen_a=glen_a, write=True)
np.testing.assert_allclose(ref_v, v)
lens = [len(gdir.read_pickle("centerlines", div_id=i)) for i in [1, 2, 3]]
pid = np.argmax(lens) + 1
cls = gdir.read_pickle("inversion_output", div_id=pid)
fls = gdir.read_pickle("inversion_flowlines", div_id=pid)
maxs = 0.0
for cl, fl in zip(cls, fls):
thick = cl["thick"]
_max = np.max(thick)
if _max > maxs:
maxs = _max
np.testing.assert_allclose(242, maxs, atol=40)
def test_invert_hef_nofs(self):
hef_file = get_demo_file('Hintereisferner.shp')
rgidf = gpd.GeoDataFrame.from_file(hef_file)
# loop because for some reason indexing wont work
for index, entity in rgidf.iterrows():
gdir = oggm.GlacierDirectory(entity, base_dir=self.testdir)
gis.define_glacier_region(gdir, entity=entity)
gis.glacier_masks(gdir)
centerlines.compute_centerlines(gdir)
geometry.initialize_flowlines(gdir)
geometry.catchment_area(gdir)
geometry.catchment_width_geom(gdir)
geometry.catchment_width_correction(gdir)
climate.distribute_climate_data([gdir])
climate.mu_candidates(gdir, div_id=0)
hef_file = get_demo_file('mbdata_RGI40-11.00897.csv')
mbdf = pd.read_csv(hef_file).set_index('YEAR')
t_star, bias = climate.t_star_from_refmb(gdir, mbdf['ANNUAL_BALANCE'])
t_star = t_star[-1]
bias = bias[-1]
climate.local_mustar_apparent_mb(gdir, tstar=t_star, bias=bias)
# OK. Values from Fischer and Kuhn 2013
# Area: 8.55
# meanH = 67+-7
# Volume = 0.573+-0.063
# maxH = 242+-13
inversion.prepare_for_inversion(gdir)
ref_v = 0.573 * 1e9
def to_optimize(x):
glen_a = cfg.A * x[0]
fs = 0.
v, _ = inversion.invert_parabolic_bed(gdir, fs=fs,
glen_a=glen_a)
return (v - ref_v)**2
import scipy.optimize as optimization
out = optimization.minimize(to_optimize, [1],
bounds=((0.00001, 100000),),
tol=1e-4)['x']
self.assertTrue(out[0] > 0.1)
self.assertTrue(out[0] < 10)
glen_a = cfg.A * out[0]
fs = 0.
v, _ = inversion.invert_parabolic_bed(gdir, fs=fs,
glen_a=glen_a,
write=True)
np.testing.assert_allclose(ref_v, v)
lens = [len(gdir.read_pickle('centerlines', div_id=i)) for i in [1,2,3]]
pid = np.argmax(lens) + 1
cls = gdir.read_pickle('inversion_output', div_id=pid)
fls = gdir.read_pickle('inversion_flowlines', div_id=pid)
maxs = 0.
for cl, fl in zip(cls, fls):
thick = cl['thick']
_max = np.max(thick)
if _max > maxs:
maxs = _max
atol = 30 if HAS_NEW_GDAL else 10
np.testing.assert_allclose(242, maxs, atol=atol)
# check that its not tooo sensitive to the dx
cfg.PARAMS['flowline_dx'] = 1.
geometry.initialize_flowlines(gdir)
geometry.catchment_area(gdir)
geometry.catchment_width_geom(gdir)
geometry.catchment_width_correction(gdir)
climate.distribute_climate_data([gdir])
climate.mu_candidates(gdir, div_id=0)
hef_file = get_demo_file('mbdata_RGI40-11.00897.csv')
mbdf = pd.read_csv(hef_file).set_index('YEAR')
t_star, bias = climate.t_star_from_refmb(gdir, mbdf['ANNUAL_BALANCE'])
t_star = t_star[-1]
bias = bias[-1]
climate.local_mustar_apparent_mb(gdir, tstar=t_star, bias=bias)
inversion.prepare_for_inversion(gdir)
v, _ = inversion.invert_parabolic_bed(gdir, fs=fs,
glen_a=glen_a,
write=True)
np.testing.assert_allclose(ref_v, v, rtol=0.02)
cls = gdir.read_pickle('inversion_output', div_id=pid)
maxs = 0.
for cl in cls:
thick = cl['thick']
_max = np.max(thick)
if _max > maxs:
maxs = _max
np.testing.assert_allclose(242, maxs, atol=atol)
def init_hef(reset=False, border=40, invert_with_sliding=True):
from oggm.core.preprocessing import gis, centerlines, geometry
from oggm.core.preprocessing import climate, inversion
import oggm
import oggm.cfg as cfg
from oggm.utils import get_demo_file
# test directory
testdir = TESTDIR_BASE + '_border{}'.format(border)
if not invert_with_sliding:
testdir += '_withoutslide'
if not os.path.exists(testdir):
os.makedirs(testdir)
reset = True
if not os.path.exists(os.path.join(testdir, 'RGI40-11.00897')):
reset = True
if not os.path.exists(os.path.join(testdir, 'RGI40-11.00897',
'inversion_params.pkl')):
reset = True
# Init
cfg.initialize()
cfg.PATHS['dem_file'] = get_demo_file('hef_srtm.tif')
cfg.PATHS['climate_file'] = get_demo_file('histalp_merged_hef.nc')
cfg.PARAMS['border'] = border
hef_file = get_demo_file('Hintereisferner.shp')
entity = gpd.GeoDataFrame.from_file(hef_file).iloc[0]
gdir = oggm.GlacierDirectory(entity, base_dir=testdir, reset=reset)
if not reset:
return gdir
gis.define_glacier_region(gdir, entity=entity)
gis.glacier_masks(gdir)
centerlines.compute_centerlines(gdir)
centerlines.compute_downstream_lines(gdir)
geometry.initialize_flowlines(gdir)
geometry.catchment_area(gdir)
geometry.catchment_width_geom(gdir)
geometry.catchment_width_correction(gdir)
climate.process_histalp_nonparallel([gdir])
climate.mu_candidates(gdir, div_id=0)
mbdf = gdir.get_ref_mb_data()['ANNUAL_BALANCE']
res = climate.t_star_from_refmb(gdir, mbdf)
climate.local_mustar_apparent_mb(gdir, tstar=res['t_star'][-1],
bias=res['bias'][-1],
prcp_fac=res['prcp_fac'])
inversion.prepare_for_inversion(gdir)
ref_v = 0.573 * 1e9
if invert_with_sliding:
def to_optimize(x):
# For backwards compat
_fd = 1.9e-24 * x[0]
glen_a = (cfg.N+2) * _fd / 2.
fs = 5.7e-20 * x[1]
v, _ = inversion.invert_parabolic_bed(gdir, fs=fs,
glen_a=glen_a)
return (v - ref_v)**2
out = optimization.minimize(to_optimize, [1, 1],
bounds=((0.01, 10), (0.01, 10)),
tol=1e-4)['x']
_fd = 1.9e-24 * out[0]
glen_a = (cfg.N+2) * _fd / 2.
fs = 5.7e-20 * out[1]
v, _ = inversion.invert_parabolic_bed(gdir, fs=fs,
glen_a=glen_a,
write=True)
else:
def to_optimize(x):
glen_a = cfg.A * x[0]
v, _ = inversion.invert_parabolic_bed(gdir, fs=0.,
glen_a=glen_a)
return (v - ref_v)**2
out = optimization.minimize(to_optimize, [1],
bounds=((0.01, 10),),
tol=1e-4)['x']
glen_a = cfg.A * out[0]
fs = 0.
v, _ = inversion.invert_parabolic_bed(gdir, fs=fs,
glen_a=glen_a,
write=True)
d = dict(fs=fs, glen_a=glen_a)
d['factor_glen_a'] = out[0]
try:
d['factor_fs'] = out[1]
except IndexError:
d['factor_fs'] = 0.
gdir.write_pickle(d, 'inversion_params')
inversion.distribute_thickness(gdir, how='per_altitude',
add_nc_name=True)
inversion.distribute_thickness(gdir, how='per_interpolation',
add_slope=False, smooth=False,
add_nc_name=True)
return gdir
def to_optimize(x):
glen_a = cfg.A * x[0]
v, a = invert_parabolic_bed(gdir, glen_a=glen_a, fs=0.,
write=False)
return utils.rmsd(v / a, gtd_df['ref_thickness_m'].loc[gdir.rgi_id])
def init_hef(reset=False, border=40, invert_with_sliding=True):
# test directory
testdir = TESTDIR_BASE + '_border{}'.format(border)
if not invert_with_sliding:
testdir += '_withoutslide'
if not os.path.exists(testdir):
os.makedirs(testdir)
reset = True
if not os.path.exists(os.path.join(testdir, 'RGI40-11.00897')):
reset = True
if not os.path.exists(os.path.join(testdir, 'RGI40-11.00897',
'inversion_params.pkl')):
reset = True
# Init
cfg.initialize()
cfg.set_divides_db(get_demo_file('HEF_divided.shp'))
cfg.PATHS['dem_file'] = get_demo_file('hef_srtm.tif')
cfg.PATHS['climate_file'] = get_demo_file('histalp_merged_hef.nc')
cfg.PARAMS['border'] = border
# loop because for some reason indexing wont work
hef_file = get_demo_file('Hintereisferner.shp')
rgidf = gpd.GeoDataFrame.from_file(hef_file)
for index, entity in rgidf.iterrows():
gdir = oggm.GlacierDirectory(entity, base_dir=testdir, reset=reset)
if not reset:
return gdir
gis.define_glacier_region(gdir, entity=entity)
gis.glacier_masks(gdir)
centerlines.compute_centerlines(gdir)
centerlines.compute_downstream_lines(gdir)
geometry.initialize_flowlines(gdir)
geometry.catchment_area(gdir)
geometry.catchment_width_geom(gdir)
geometry.catchment_width_correction(gdir)
climate.distribute_climate_data([gdir])
climate.mu_candidates(gdir, div_id=0)
hef_file = get_demo_file('mbdata_RGI40-11.00897.csv')
mbdf = pd.read_csv(hef_file).set_index('YEAR')
t_star, bias = climate.t_star_from_refmb(gdir, mbdf['ANNUAL_BALANCE'])
climate.local_mustar_apparent_mb(gdir, tstar=t_star[-1], bias=bias[-1])
inversion.prepare_for_inversion(gdir)
ref_v = 0.573 * 1e9
if invert_with_sliding:
def to_optimize(x):
# For backwards compat
_fd = 1.9e-24 * x[0]
glen_a = (cfg.N+2) * _fd / 2.
fs = 5.7e-20 * x[1]
v, _ = inversion.invert_parabolic_bed(gdir, fs=fs,
glen_a=glen_a)
return (v - ref_v)**2
import scipy.optimize as optimization
out = optimization.minimize(to_optimize, [1, 1],
bounds=((0.01, 10), (0.01, 10)),
tol=1e-4)['x']
_fd = 1.9e-24 * out[0]
glen_a = (cfg.N+2) * _fd / 2.
fs = 5.7e-20 * out[1]
v, _ = inversion.invert_parabolic_bed(gdir, fs=fs,
glen_a=glen_a,
write=True)
else:
def to_optimize(x):
glen_a = cfg.A * x[0]
v, _ = inversion.invert_parabolic_bed(gdir, fs=0.,
glen_a=glen_a)
return (v - ref_v)**2
import scipy.optimize as optimization
out = optimization.minimize(to_optimize, [1],
bounds=((0.01, 10),),
tol=1e-4)['x']
glen_a = cfg.A * out[0]
fs = 0.
v, _ = inversion.invert_parabolic_bed(gdir, fs=fs,
glen_a=glen_a,
write=True)
d = dict(fs=fs, glen_a=glen_a)
d['factor_glen_a'] = out[0]
try:
d['factor_fs'] = out[1]
except IndexError:
d['factor_fs'] = 0.
gdir.write_pickle(d, 'inversion_params')
return gdir
def test_distribute(self):
hef_file = get_demo_file('Hintereisferner.shp')
entity = gpd.GeoDataFrame.from_file(hef_file).iloc[0]
gdir = oggm.GlacierDirectory(entity, base_dir=self.testdir)
gis.define_glacier_region(gdir, entity=entity)
gis.glacier_masks(gdir)
centerlines.compute_centerlines(gdir)
geometry.initialize_flowlines(gdir)
geometry.catchment_area(gdir)
geometry.catchment_width_geom(gdir)
geometry.catchment_width_correction(gdir)
climate.distribute_climate_data([gdir])
climate.mu_candidates(gdir, div_id=0)
hef_file = get_demo_file('mbdata_RGI40-11.00897.csv')
mbdf = pd.read_csv(hef_file).set_index('YEAR')
t_star, bias = climate.t_star_from_refmb(gdir, mbdf['ANNUAL_BALANCE'])
t_star = t_star[-1]
bias = bias[-1]
climate.local_mustar_apparent_mb(gdir, tstar=t_star, bias=bias)
# OK. Values from Fischer and Kuhn 2013
# Area: 8.55
# meanH = 67+-7
# Volume = 0.573+-0.063
# maxH = 242+-13
inversion.prepare_for_inversion(gdir)
ref_v = 0.573 * 1e9
def to_optimize(x):
glen_a = cfg.A * x[0]
fs = cfg.FS * x[1]
v, _ = inversion.invert_parabolic_bed(gdir, fs=fs, glen_a=glen_a)
return (v - ref_v)**2
import scipy.optimize as optimization
out = optimization.minimize(to_optimize, [1, 1],
bounds=((0.01, 10), (0.01, 10)),
tol=1e-1)['x']
glen_a = cfg.A * out[0]
fs = cfg.FS * out[1]
v, _ = inversion.invert_parabolic_bed(gdir,
fs=fs,
glen_a=glen_a,
write=True)
np.testing.assert_allclose(ref_v, v)
inversion.distribute_thickness(gdir,
how='per_altitude',
add_nc_name=True)
inversion.distribute_thickness(gdir,
how='per_interpolation',
add_slope=False,
add_nc_name=True)
grids_file = gdir.get_filepath('gridded_data')
with netCDF4.Dataset(grids_file) as nc:
t1 = nc.variables['thickness_per_altitude'][:]
t2 = nc.variables['thickness_per_interpolation'][:]
np.testing.assert_allclose(np.sum(t1), np.sum(t2))
if not HAS_NEW_GDAL:
np.testing.assert_allclose(np.max(t1), np.max(t2), atol=30)
def init_hef(reset=False, border=40, invert_with_sliding=True):
from oggm.core.preprocessing import gis, centerlines, geometry
from oggm.core.preprocessing import climate, inversion
import oggm
import oggm.cfg as cfg
from oggm.utils import get_demo_file
# test directory
testdir = TESTDIR_BASE + "_border{}".format(border)
if not invert_with_sliding:
testdir += "_withoutslide"
if not os.path.exists(testdir):
os.makedirs(testdir)
reset = True
if not os.path.exists(os.path.join(testdir, "RGI40-11.00897")):
reset = True
if not os.path.exists(os.path.join(testdir, "RGI40-11.00897", "inversion_params.pkl")):
reset = True
# Init
cfg.initialize()
cfg.PATHS["dem_file"] = get_demo_file("hef_srtm.tif")
cfg.PATHS["climate_file"] = get_demo_file("histalp_merged_hef.nc")
cfg.PARAMS["border"] = border
hef_file = get_demo_file("Hintereisferner.shp")
entity = gpd.GeoDataFrame.from_file(hef_file).iloc[0]
gdir = oggm.GlacierDirectory(entity, base_dir=testdir, reset=reset)
if not reset:
return gdir
gis.define_glacier_region(gdir, entity=entity)
gis.glacier_masks(gdir)
centerlines.compute_centerlines(gdir)
centerlines.compute_downstream_lines(gdir)
geometry.initialize_flowlines(gdir)
geometry.catchment_area(gdir)
geometry.catchment_width_geom(gdir)
geometry.catchment_width_correction(gdir)
climate.process_histalp_nonparallel([gdir])
climate.mu_candidates(gdir, div_id=0)
hef_file = get_demo_file("mbdata_RGI40-11.00897.csv")
mbdf = pd.read_csv(hef_file).set_index("YEAR")
t_star, bias, prcp_fac = climate.t_star_from_refmb(gdir, mbdf["ANNUAL_BALANCE"])
climate.local_mustar_apparent_mb(gdir, tstar=t_star[-1], bias=bias[-1], prcp_fac=prcp_fac)
inversion.prepare_for_inversion(gdir)
ref_v = 0.573 * 1e9
if invert_with_sliding:
def to_optimize(x):
# For backwards compat
_fd = 1.9e-24 * x[0]
glen_a = (cfg.N + 2) * _fd / 2.0
fs = 5.7e-20 * x[1]
v, _ = inversion.invert_parabolic_bed(gdir, fs=fs, glen_a=glen_a)
return (v - ref_v) ** 2
out = optimization.minimize(to_optimize, [1, 1], bounds=((0.01, 10), (0.01, 10)), tol=1e-4)["x"]
_fd = 1.9e-24 * out[0]
glen_a = (cfg.N + 2) * _fd / 2.0
fs = 5.7e-20 * out[1]
v, _ = inversion.invert_parabolic_bed(gdir, fs=fs, glen_a=glen_a, write=True)
else:
def to_optimize(x):
glen_a = cfg.A * x[0]
v, _ = inversion.invert_parabolic_bed(gdir, fs=0.0, glen_a=glen_a)
return (v - ref_v) ** 2
out = optimization.minimize(to_optimize, [1], bounds=((0.01, 10),), tol=1e-4)["x"]
glen_a = cfg.A * out[0]
fs = 0.0
v, _ = inversion.invert_parabolic_bed(gdir, fs=fs, glen_a=glen_a, write=True)
d = dict(fs=fs, glen_a=glen_a)
d["factor_glen_a"] = out[0]
try:
d["factor_fs"] = out[1]
except IndexError:
d["factor_fs"] = 0.0
gdir.write_pickle(d, "inversion_params")
inversion.distribute_thickness(gdir, how="per_altitude", add_nc_name=True)
inversion.distribute_thickness(gdir, how="per_interpolation", add_slope=False, smooth=False, add_nc_name=True)
return gdir
def init_hef(reset=False, border=40, invert_with_sliding=True):
# test directory
testdir = TESTDIR_BASE + '_border{}'.format(border)
if not invert_with_sliding:
testdir += '_withoutslide'
if not os.path.exists(testdir):
os.makedirs(testdir)
reset = True
if not os.path.exists(os.path.join(testdir, 'RGI40-11.00897')):
reset = True
if not os.path.exists(os.path.join(testdir, 'RGI40-11.00897',
'inversion_params.pkl')):
reset = True
# Init
cfg.initialize()
cfg.set_divides_db(get_demo_file('HEF_divided.shp'))
cfg.PATHS['dem_file'] = get_demo_file('hef_srtm.tif')
cfg.PATHS['climate_file'] = get_demo_file('histalp_merged_hef.nc')
cfg.PARAMS['border'] = border
# loop because for some reason indexing wont work
hef_file = get_demo_file('Hintereisferner.shp')
rgidf = gpd.GeoDataFrame.from_file(hef_file)
for index, entity in rgidf.iterrows():
gdir = oggm.GlacierDirectory(entity, base_dir=testdir, reset=reset)
if not reset:
return gdir
gis.define_glacier_region(gdir, entity=entity)
gis.glacier_masks(gdir)
centerlines.compute_centerlines(gdir)
centerlines.compute_downstream_lines(gdir)
geometry.initialize_flowlines(gdir)
geometry.catchment_area(gdir)
geometry.catchment_width_geom(gdir)
geometry.catchment_width_correction(gdir)
climate.distribute_climate_data([gdir])
climate.mu_candidates(gdir, div_id=0)
hef_file = get_demo_file('mbdata_RGI40-11.00897.csv')
mbdf = pd.read_csv(hef_file).set_index('YEAR')
t_star, bias = climate.t_star_from_refmb(gdir, mbdf['ANNUAL_BALANCE'])
climate.local_mustar_apparent_mb(gdir, tstar=t_star[-1], bias=bias[-1])
inversion.prepare_for_inversion(gdir)
ref_v = 0.573 * 1e9
if invert_with_sliding:
def to_optimize(x):
# For backwards compat
_fd = 1.9e-24 * x[0]
glen_a = (cfg.N+2) * _fd / 2.
fs = 5.7e-20 * x[1]
v, _ = inversion.invert_parabolic_bed(gdir, fs=fs,
glen_a=glen_a)
return (v - ref_v)**2
import scipy.optimize as optimization
out = optimization.minimize(to_optimize, [1, 1],
bounds=((0.01, 10), (0.01, 10)),
tol=1e-4)['x']
_fd = 1.9e-24 * out[0]
glen_a = (cfg.N+2) * _fd / 2.
fs = 5.7e-20 * out[1]
v, _ = inversion.invert_parabolic_bed(gdir, fs=fs,
glen_a=glen_a,
write=True)
else:
def to_optimize(x):
glen_a = cfg.A * x[0]
v, _ = inversion.invert_parabolic_bed(gdir, fs=0.,
glen_a=glen_a)
return (v - ref_v)**2
import scipy.optimize as optimization
out = optimization.minimize(to_optimize, [1],
bounds=((0.01, 10),),
tol=1e-4)['x']
glen_a = cfg.A * out[0]
fs = 0.
v, _ = inversion.invert_parabolic_bed(gdir, fs=fs,
glen_a=glen_a,
write=True)
d = dict(fs=fs, glen_a=glen_a)
d['factor_glen_a'] = out[0]
try:
d['factor_fs'] = out[1]
except IndexError:
d['factor_fs'] = 0.
gdir.write_pickle(d, 'inversion_params')
inversion.distribute_thickness(gdir, how='per_altitude',
add_nc_name=True)
inversion.distribute_thickness(gdir, how='per_interpolation',
add_slope=False, smooth=False,
add_nc_name=True)
return gdir
def test_invert_hef_nofs(self):
hef_file = get_demo_file("Hintereisferner.shp")
entity = gpd.GeoDataFrame.from_file(hef_file).iloc[0]
gdir = oggm.GlacierDirectory(entity, base_dir=self.testdir)
gis.define_glacier_region(gdir, entity=entity)
gis.glacier_masks(gdir)
centerlines.compute_centerlines(gdir)
geometry.initialize_flowlines(gdir)
geometry.catchment_area(gdir)
geometry.catchment_width_geom(gdir)
geometry.catchment_width_correction(gdir)
climate.process_histalp_nonparallel([gdir])
climate.mu_candidates(gdir, div_id=0)
hef_file = get_demo_file("mbdata_RGI40-11.00897.csv")
mbdf = pd.read_csv(hef_file).set_index("YEAR")
t_star, bias, prcp_fac = climate.t_star_from_refmb(gdir, mbdf["ANNUAL_BALANCE"])
t_star = t_star[-1]
bias = bias[-1]
climate.local_mustar_apparent_mb(gdir, tstar=t_star, bias=bias, prcp_fac=prcp_fac)
# OK. Values from Fischer and Kuhn 2013
# Area: 8.55
# meanH = 67+-7
# Volume = 0.573+-0.063
# maxH = 242+-13
inversion.prepare_for_inversion(gdir)
ref_v = 0.573 * 1e9
def to_optimize(x):
glen_a = cfg.A * x[0]
fs = 0.0
v, _ = inversion.invert_parabolic_bed(gdir, fs=fs, glen_a=glen_a)
return (v - ref_v) ** 2
import scipy.optimize as optimization
out = optimization.minimize(to_optimize, [1], bounds=((0.00001, 100000),), tol=1e-4)["x"]
self.assertTrue(out[0] > 0.1)
self.assertTrue(out[0] < 10)
glen_a = cfg.A * out[0]
fs = 0.0
v, _ = inversion.invert_parabolic_bed(gdir, fs=fs, glen_a=glen_a, write=True)
np.testing.assert_allclose(ref_v, v)
lens = [len(gdir.read_pickle("centerlines", div_id=i)) for i in [1, 2, 3]]
pid = np.argmax(lens) + 1
cls = gdir.read_pickle("inversion_output", div_id=pid)
fls = gdir.read_pickle("inversion_flowlines", div_id=pid)
maxs = 0.0
for cl, fl in zip(cls, fls):
thick = cl["thick"]
_max = np.max(thick)
if _max > maxs:
maxs = _max
np.testing.assert_allclose(242, maxs, atol=25)
# check that its not tooo sensitive to the dx
cfg.PARAMS["flowline_dx"] = 1.0
geometry.initialize_flowlines(gdir)
geometry.catchment_area(gdir)
geometry.catchment_width_geom(gdir)
geometry.catchment_width_correction(gdir)
climate.process_histalp_nonparallel([gdir])
climate.mu_candidates(gdir, div_id=0)
hef_file = get_demo_file("mbdata_RGI40-11.00897.csv")
mbdf = pd.read_csv(hef_file).set_index("YEAR")
t_star, bias, prcp_fac = climate.t_star_from_refmb(gdir, mbdf["ANNUAL_BALANCE"])
t_star = t_star[-1]
bias = bias[-1]
climate.local_mustar_apparent_mb(gdir, tstar=t_star, bias=bias, prcp_fac=prcp_fac)
inversion.prepare_for_inversion(gdir)
v, _ = inversion.invert_parabolic_bed(gdir, fs=fs, glen_a=glen_a, write=True)
np.testing.assert_allclose(ref_v, v, rtol=0.02)
cls = gdir.read_pickle("inversion_output", div_id=pid)
maxs = 0.0
for cl in cls:
thick = cl["thick"]
_max = np.max(thick)
if _max > maxs:
maxs = _max
np.testing.assert_allclose(242, maxs, atol=25)
def optimize_thick(gdirs):
"""Optimizes fd based on GlaThiDa thicknesses.
We use the glacier averaged thicknesses provided by GlaThiDa and correct
them for differences in area with RGI, using a glacier specific volume-area
scaling formula.
Parameters
----------
gdirs: list of oggm.GlacierDirectory objects
"""
gtd_df = _prepare_inv(gdirs)
ref_gdirs = gtd_df['ref_gdirs']
ref_volume_km3 = gtd_df['ref_volume_km3']
ref_area_km2 = gtd_df['ref_area_km2']
ref_thickness_m = gtd_df['ref_thickness_m']
# Optimize without sliding
log.info('Compute the inversion parameter.')
def to_optimize(x):
tmp_ = np.zeros(len(ref_gdirs))
glen_a = cfg.A * x[0]
for i, gdir in enumerate(ref_gdirs):
v, a = invert_parabolic_bed(gdir,
glen_a=glen_a,
fs=0.,
write=False)
tmp_[i] = v / a
return utils.rmsd(tmp_, ref_thickness_m)
opti = optimization.minimize(to_optimize, [1.],
bounds=((0.01, 10), ),
tol=1.e-4)
# Check results and save.
glen_a = cfg.A * opti['x'][0]
fs = 0.
# This is for the stats
oggm_volume_m3 = np.zeros(len(ref_gdirs))
rgi_area_m2 = np.zeros(len(ref_gdirs))
for i, gdir in enumerate(ref_gdirs):
v, a = invert_parabolic_bed(gdir, glen_a=glen_a, fs=fs, write=False)
oggm_volume_m3[i] = v
rgi_area_m2[i] = a
assert np.allclose(rgi_area_m2 * 1e-6, ref_area_km2)
# This is for each glacier
out = dict()
out['glen_a'] = glen_a
out['fs'] = fs
out['factor_glen_a'] = opti['x'][0]
try:
out['factor_fs'] = opti['x'][1]
except IndexError:
out['factor_fs'] = 0.
for gdir in gdirs:
gdir.write_pickle(out, 'inversion_params')
# This is for the working dir
# Simple stats
out['vol_rmsd'] = utils.rmsd(oggm_volume_m3 * 1e-9, ref_volume_km3)
out['thick_rmsd'] = utils.rmsd(oggm_volume_m3 / (ref_area_km2 * 1e6),
ref_thickness_m)
log.info(
'Optimized glen_a and fs with a factor {factor_glen_a:.2f} and '
'{factor_fs:.2f} for a thick RMSD of {thick_rmsd:.3f}'.format(**out))
df = pd.DataFrame(out, index=[0])
fpath = os.path.join(cfg.PATHS['working_dir'],
'inversion_optim_params.csv')
df.to_csv(fpath)
# All results
df = utils.glacier_characteristics(ref_gdirs)
df['ref_area_km2'] = ref_area_km2
df['ref_volume_km3'] = ref_volume_km3
df['ref_thickness_m'] = ref_thickness_m
df['oggm_volume_km3'] = oggm_volume_m3 * 1e-9
df['oggm_thickness_m'] = oggm_volume_m3 / (ref_area_km2 * 1e6)
df['vas_volume_km3'] = 0.034 * (df['ref_area_km2']**1.375)
df['vas_thickness_m'] = df['vas_volume_km3'] / ref_area_km2 * 1000
rgi_id = [gdir.rgi_id for gdir in ref_gdirs]
df = pd.DataFrame(df, index=rgi_id)
fpath = os.path.join(cfg.PATHS['working_dir'],
'inversion_optim_results.csv')
df.to_csv(fpath)
# return value for tests
return out
def optimize_thick(gdirs):
"""Optimizes fd based on GlaThiDa thicknesses.
We use the glacier averaged thicknesses provided by GlaThiDa and correct
them for differences in area with RGI, using a glacier specific volume-area
scaling formula.
Parameters
----------
gdirs: list of oggm.GlacierDirectory objects
"""
gtd_df = _prepare_inv(gdirs)
ref_gdirs = gtd_df['ref_gdirs']
ref_volume_km3 = gtd_df['ref_volume_km3']
ref_area_km2 = gtd_df['ref_area_km2']
ref_thickness_m = gtd_df['ref_thickness_m']
# Optimize without sliding
log.info('Compute the inversion parameter.')
def to_optimize(x):
tmp_ = np.zeros(len(ref_gdirs))
glen_a = cfg.A * x[0]
for i, gdir in enumerate(ref_gdirs):
v, a = invert_parabolic_bed(gdir, glen_a=glen_a,
fs=0., write=False)
tmp_[i] = v / a
return utils.rmsd(tmp_, ref_thickness_m)
opti = optimization.minimize(to_optimize, [1.],
bounds=((0.01, 10), ),
tol=1.e-4)
# Check results and save.
glen_a = cfg.A * opti['x'][0]
fs = 0.
# This is for the stats
oggm_volume_m3 = np.zeros(len(ref_gdirs))
rgi_area_m2 = np.zeros(len(ref_gdirs))
for i, gdir in enumerate(ref_gdirs):
v, a = invert_parabolic_bed(gdir, glen_a=glen_a, fs=fs,
write=False)
oggm_volume_m3[i] = v
rgi_area_m2[i] = a
assert np.allclose(rgi_area_m2 * 1e-6, ref_area_km2)
# This is for each glacier
out = dict()
out['glen_a'] = glen_a
out['fs'] = fs
out['factor_glen_a'] = opti['x'][0]
try:
out['factor_fs'] = opti['x'][1]
except IndexError:
out['factor_fs'] = 0.
for gdir in gdirs:
gdir.write_pickle(out, 'inversion_params')
# This is for the working dir
# Simple stats
out['vol_rmsd'] = utils.rmsd(oggm_volume_m3 * 1e-9, ref_volume_km3)
out['thick_rmsd'] = utils.rmsd(oggm_volume_m3 / (ref_area_km2 * 1e6),
ref_thickness_m)
log.info('Optimized glen_a and fs with a factor {factor_glen_a:.2f} and '
'{factor_fs:.2f} for a thick RMSD of {thick_rmsd:.3f}'.format(
**out))
df = pd.DataFrame(out, index=[0])
fpath = os.path.join(cfg.PATHS['working_dir'],
'inversion_optim_params.csv')
df.to_csv(fpath)
# All results
df = utils.glacier_characteristics(ref_gdirs)
df['ref_area_km2'] = ref_area_km2
df['ref_volume_km3'] = ref_volume_km3
df['ref_thickness_m'] = ref_thickness_m
df['oggm_volume_km3'] = oggm_volume_m3 * 1e-9
df['oggm_thickness_m'] = oggm_volume_m3 / (ref_area_km2 * 1e6)
df['vas_volume_km3'] = 0.034*(df['ref_area_km2']**1.375)
df['vas_thickness_m'] = df['vas_volume_km3'] / ref_area_km2 * 1000
rgi_id = [gdir.rgi_id for gdir in ref_gdirs]
df = pd.DataFrame(df, index=rgi_id)
fpath = os.path.join(cfg.PATHS['working_dir'],
'inversion_optim_results.csv')
df.to_csv(fpath)
# return value for tests
return out
