def test_parcel_profile_saturated():
"""Test parcel_profile works when LCL in levels (issue #232)."""
levels = np.array([1000., 700., 500.]) * units.mbar
true_prof = np.array([296.95, 284.381, 271.123]) * units.kelvin
prof = parcel_profile(levels, 23.8 * units.degC, 23.8 * units.degC)
assert_array_almost_equal(prof, true_prof, 2)
def calculate_basic_thermo(self):
#Enclose in try, except because not every sounding will have a converging parcel path or CAPE.
try:
#Precipitable Water
self.pw = mc.precipitable_water(self.sounding["pres"],
self.sounding["dewp"])
#Lifting condensation level
self.lcl_pres, self.lcl_temp = mc.lcl(self.sounding["pres"][0],
self.sounding["temp"][0],
self.sounding["dewp"][0])
#Surface-based CAPE and CIN
self.parcel_path = mc.parcel_profile(self.sounding["pres"],
self.sounding["temp"][0],
self.sounding["dewp"][0])
self.sfc_cape, self.sfc_cin = mc.cape_cin(self.sounding["pres"],
self.sounding["temp"],
self.sounding["dewp"],
self.parcel_path)
#Do this when parcel path fails to converge
except Exception as e:
print("WARNING: No LCL, CAPE, or PW stats because:\n{}.".format(e))
self.parcel_path = numpy.nan
self.pw = numpy.nan
self.lcl_pres = numpy.nan
self.lcl_temp = numpy.nan
self.sfc_cape = numpy.nan
self.sfc_cin = numpy.nan
#Returning
return
def add_entropy(ax,
pressure,
temperature,
mixing_ratio,
ds=100,
linewidth=1.0):
"add entropy curves and rescale values to fit in by 0.5*entropy + ds"
p = pressure * units('mbar')
T = temperature * units('degC')
q = mixing_ratio * units('kilogram/kilogram')
qs = mpcalc.mixing_ratio(mpcalc.saturation_vapor_pressure(T), p)
Td = mpcalc.dewpoint(mpcalc.vapor_pressure(p, q)) # dewpoint
Tp = mpcalc.parcel_profile(p, T[0], Td[0]).to('degC') # parcel profile
# specific entropy [joule/(kg*K)]
# sd : specific entropy of dry air
# sm1 : specific entropy of airborne mositure in state 1 (water vapor)
# sm2 : specific entropy of airborne mositure in state 2 (saturated water vapor)
sd = entropy(T, q * 0, p)
sm1 = entropy(T, q, p)
sm2 = entropy(T, qs, p)
ax.plot(sd.magnitude * 0.5 + ds, p, '--k')
ax.plot(sm1.magnitude * 0.5 + ds, p, '--b')
ax.plot(sm2.magnitude * 0.5 + ds, p, '--r')
def test_parcel_profile_saturated():
"""Test parcel_profile works when LCL in levels (issue #232)."""
levels = np.array([1000., 700., 500.]) * units.mbar
true_prof = np.array([296.95, 284.381, 271.123]) * units.kelvin
prof = parcel_profile(levels, 23.8 * units.degC, 23.8 * units.degC)
assert_array_almost_equal(prof, true_prof, 2)
def _plot_profile(self, skew):
profiles = self.atmo_profiles # dictionary
pres = profiles.get('pres').get('data')
temp = profiles.get('temp').get('data')
sphum = profiles.get('sphum').get('data')
dewpt = mpcalc.dewpoint_from_specific_humidity(sphum, temp,
pres).to('degF')
# Pressure vs temperature
skew.plot(pres, temp, 'r', linewidth=1.5)
# Pressure vs dew point temperature
skew.plot(pres, dewpt, 'blue', linewidth=1.5)
# Compute parcel profile and plot it
parcel_profile = mpcalc.parcel_profile(pres, temp[0],
dewpt[0]).to('degC')
skew.plot(
pres,
parcel_profile,
'orange',
linestyle='dashed',
linewidth=1.2,
)
def test_parcel_profile():
"""Test parcel profile calculation."""
levels = np.array([1000., 900., 800., 700., 600., 500., 400.]) * units.mbar
true_prof = np.array([303.15, 294.16, 288.026, 283.073, 277.058, 269.402,
258.966]) * units.kelvin
prof = parcel_profile(levels, 30. * units.degC, 20. * units.degC)
assert_array_almost_equal(prof, true_prof, 2)
def test_parcel_profile():
"""Test parcel profile calculation."""
levels = np.array([1000., 900., 800., 700., 600., 500., 400.]) * units.mbar
true_prof = np.array([303.15, 294.16, 288.026, 283.073, 277.058, 269.402,
258.966]) * units.kelvin
prof = parcel_profile(levels, 30. * units.degC, 20. * units.degC)
assert_array_almost_equal(prof, true_prof, 2)
def plot_sounding(date, station):
p, T, Td, u, v, windspeed = get_sounding_data(date, station)
lcl_pressure, lcl_temperature = mpcalc.lcl(p[0], T[0], Td[0])
lfc_pressure, lfc_temperature = mpcalc.lfc(p, T, Td)
parcel_path = mpcalc.parcel_profile(p, T[0], Td[0]).to('degC')
# Create a new figure. The dimensions here give a good aspect ratio
fig = plt.figure(figsize=(8, 8))
skew = SkewT(fig)
# Plot the data
temperature_line, = skew.plot(p, T, color='tab:red')
dewpoint_line, = skew.plot(p, Td, color='blue')
cursor = mplcursors.cursor([temperature_line, dewpoint_line])
# Plot thermodynamic parameters and parcel path
skew.plot(p, parcel_path, color='black')
if lcl_pressure:
skew.ax.axhline(lcl_pressure, color='black')
if lfc_pressure:
skew.ax.axhline(lfc_pressure, color='0.7')
# Add the relevant special lines
skew.ax.axvline(0, color='c', linestyle='--', linewidth=2)
skew.plot_dry_adiabats()
skew.plot_moist_adiabats()
skew.plot_mixing_lines()
# Shade areas representing CAPE and CIN
skew.shade_cin(p, T, parcel_path)
skew.shade_cape(p, T, parcel_path)
# Add wind barbs
skew.plot_barbs(p, u, v)
# Add an axes to the plot
ax_hod = inset_axes(skew.ax, '30%', '30%', loc=1, borderpad=3)
# Plot the hodograph
h = Hodograph(ax_hod, component_range=100.)
# Grid the hodograph
h.add_grid(increment=20)
# Plot the data on the hodograph
mask = (p >= 100 * units.mbar)
h.plot_colormapped(u[mask], v[mask],
windspeed[mask]) # Plot a line colored by wind speed
# Set some sensible axis limits
skew.ax.set_ylim(1000, 100)
skew.ax.set_xlim(-40, 60)
return fig, skew
def test_cape_cin_no_lfc():
"""Test that CAPE is zero with no LFC."""
p = np.array([959., 779.2, 751.3, 724.3, 700., 269.]) * units.mbar
temperature = np.array([22.2, 24.6, 22., 20.4, 18., -10.]) * units.celsius
dewpoint = np.array([19., -11.2, -10.8, -10.4, -10., -53.2]) * units.celsius
parcel_prof = parcel_profile(p, temperature[0], dewpoint[0]).to('degC')
cape, cin = cape_cin(p, temperature, dewpoint, parcel_prof)
assert_almost_equal(cape, 0.0 * units('joule / kilogram'), 6)
assert_almost_equal(cin, 0.0 * units('joule / kilogram'), 6)
def test_cape_cin_no_el():
"""Test that CAPE works with no EL."""
p = np.array([959., 779.2, 751.3, 724.3]) * units.mbar
temperature = np.array([22.2, 14.6, 12., 9.4]) * units.celsius
dewpoint = np.array([19., -11.2, -10.8, -10.4]) * units.celsius
parcel_prof = parcel_profile(p, temperature[0], dewpoint[0]).to('degC')
cape, cin = cape_cin(p, temperature, dewpoint, parcel_prof)
assert_almost_equal(cape, 0.08750805 * units('joule / kilogram'), 6)
assert_almost_equal(cin, -89.8073512 * units('joule / kilogram'), 6)
def test_cape_cin():
"""Test the basic CAPE and CIN calculation."""
p = np.array([959., 779.2, 751.3, 724.3, 700., 269.]) * units.mbar
temperature = np.array([22.2, 14.6, 12., 9.4, 7., -38.]) * units.celsius
dewpoint = np.array([19., -11.2, -10.8, -10.4, -10., -53.2]) * units.celsius
parcel_prof = parcel_profile(p, temperature[0], dewpoint[0])
cape, cin = cape_cin(p, temperature, dewpoint, parcel_prof)
assert_almost_equal(cape, 58.0368212 * units('joule / kilogram'), 6)
assert_almost_equal(cin, -89.8073512 * units('joule / kilogram'), 6)
def test_cape_cin_no_el():
"""Tests that CAPE works with no EL."""
p = np.array([959., 779.2, 751.3, 724.3]) * units.mbar
temperature = np.array([22.2, 14.6, 12., 9.4]) * units.celsius
dewpoint = np.array([19., -11.2, -10.8, -10.4]) * units.celsius
parcel_prof = parcel_profile(p, temperature[0], dewpoint[0]).to('degC')
cape, cin = cape_cin(p, temperature, dewpoint, parcel_prof)
assert_almost_equal(cape, 0.08750805 * units('joule / kilogram'), 6)
assert_almost_equal(cin, -89.8073512 * units('joule / kilogram'), 6)
def test_cape_cin():
"""Tests the basic CAPE and CIN calculation."""
p = np.array([959., 779.2, 751.3, 724.3, 700., 269.]) * units.mbar
temperature = np.array([22.2, 14.6, 12., 9.4, 7., -38.]) * units.celsius
dewpoint = np.array([19., -11.2, -10.8, -10.4, -10., -53.2]) * units.celsius
parcel_prof = parcel_profile(p, temperature[0], dewpoint[0])
cape, cin = cape_cin(p, temperature, dewpoint, parcel_prof)
assert_almost_equal(cape, 58.0368212 * units('joule / kilogram'), 6)
assert_almost_equal(cin, -89.8073512 * units('joule / kilogram'), 6)
def add_curves(ax,
pressure,
temperature,
mixing_ratio,
altitude,
linewidth=1.0,
LH_Tdepend=False):
"""
overlaying new curves of multiple soundings from profiles
"""
p = pressure * units('mbar')
T = temperature * units('degC')
q = mixing_ratio * units('kilogram/kilogram')
qs = mpcalc.mixing_ratio(mpcalc.saturation_vapor_pressure(T), p)
Td = mpcalc.dewpoint(mpcalc.vapor_pressure(p, q)) # dewpoint
Tp = mpcalc.parcel_profile(p, T[0], Td[0]).to('degC') # parcel profile
# Altitude based on the hydrostatic eq.
if len(altitude) == len(pressure): # (1) altitudes for whole levels
altitude = altitude * units('meter')
elif len(altitude
) == 1: # (2) known altitude where the soundings was launched
z_surf = altitude.copy() * units('meter')
# given altitude
altitude = np.zeros((np.size(T))) * units('meter')
for i in range(np.size(T)):
altitude[i] = mpcalc.thickness_hydrostatic(
p[:i + 1], T[:i + 1]) + z_surf # Hypsometric Eq. for height
else:
print(
'***NOTE***: the altitude at the surface is assumed 0 meter, and altitudes are derived based on the hypsometric equation'
)
altitude = np.zeros(
(np.size(T))) * units('meter') # surface is 0 meter
for i in range(np.size(T)):
altitude[i] = mpcalc.thickness_hydrostatic(
p[:i + 1], T[:i + 1]) # Hypsometric Eq. for height
# specific energies
if LH_Tdepend == False:
mse = mpcalc.moist_static_energy(altitude, T, q)
mse_s = mpcalc.moist_static_energy(altitude, T, qs)
dse = mpcalc.dry_static_energy(altitude, T)
else:
# A short course in cloud physics, Roger and Yau (1989)
Lvt = (2500.8 - 2.36 * T.magnitude +
0.0016 * T.magnitude**2 - 0.00006 * T.magnitude**3) * units(
'joule/gram') # latent heat of evaporation
#Lf = 2834.1 - 0.29*T - 0.004*T**2 # latent heat of fusion
mse = Cp_d * T + g * altitude + Lvt * q
mse_s = Cp_d * T + g * altitude + Lvt * qs
dse = mpcalc.dry_static_energy(altitude, T)
ax.plot(dse, p, '--k', linewidth=linewidth)
ax.plot(mse, p, '--b', linewidth=linewidth)
ax.plot(mse_s, p, '--r', linewidth=linewidth)
def test_cape_cin_custom_profile():
"""Test the CAPE and CIN calculation with a custom profile passed to LFC and EL."""
p = np.array([959., 779.2, 751.3, 724.3, 700., 269.]) * units.mbar
temperature = np.array([22.2, 14.6, 12., 9.4, 7., -38.]) * units.celsius
dewpoint = np.array([19., -11.2, -10.8, -10.4, -10., -53.2]) * units.celsius
parcel_prof = parcel_profile(p, temperature[0], dewpoint[0]) + 5 * units.delta_degC
cape, cin = cape_cin(p, temperature, dewpoint, parcel_prof)
assert_almost_equal(cape, 1443.505086499895 * units('joule / kilogram'), 6)
assert_almost_equal(cin, 0.0 * units('joule / kilogram'), 6)
def test_cape_cin_no_lfc():
"""Tests that CAPE is zero with no LFC."""
p = np.array([959., 779.2, 751.3, 724.3, 700., 269.]) * units.mbar
temperature = np.array([22.2, 24.6, 22., 20.4, 18., -10.]) * units.celsius
dewpoint = np.array([19., -11.2, -10.8, -10.4, -10., -53.2]) * units.celsius
parcel_prof = parcel_profile(p, temperature[0], dewpoint[0]).to('degC')
cape, cin = cape_cin(p, temperature, dewpoint, parcel_prof)
assert_almost_equal(cape, 0.0 * units('joule / kilogram'), 6)
assert_almost_equal(cin, 0.0 * units('joule / kilogram'), 6)
def plot_sounding(date, station):
p, T, Td, u, v, windspeed = get_sounding_data(date, station)
lcl_pressure, lcl_temperature = mpcalc.lcl(p[0], T[0], Td[0])
lfc_pressure, lfc_temperature = mpcalc.lfc(p, T, Td)
parcel_path = mpcalc.parcel_profile(p, T[0], Td[0]).to('degC')
# Create a new figure. The dimensions here give a good aspect ratio
fig = plt.figure(figsize=(8, 8))
skew = SkewT(fig)
# Plot the data
temperature_line, = skew.plot(p, T, color='tab:red')
dewpoint_line, = skew.plot(p, Td, color='blue')
cursor = mplcursors.cursor([temperature_line, dewpoint_line])
# Plot thermodynamic parameters and parcel path
skew.plot(p, parcel_path, color='black')
if lcl_pressure:
skew.ax.axhline(lcl_pressure, color='black')
if lfc_pressure:
skew.ax.axhline(lfc_pressure, color='0.7')
# Add the relevant special lines
skew.ax.axvline(0, color='c', linestyle='--', linewidth=2)
skew.plot_dry_adiabats()
skew.plot_moist_adiabats()
skew.plot_mixing_lines()
# Shade areas representing CAPE and CIN
skew.shade_cin(p, T, parcel_path)
skew.shade_cape(p, T, parcel_path)
# Add wind barbs
skew.plot_barbs(p, u, v)
# Add an axes to the plot
ax_hod = inset_axes(skew.ax, '30%', '30%', loc=1, borderpad=3)
# Plot the hodograph
h = Hodograph(ax_hod, component_range=100.)
# Grid the hodograph
h.add_grid(increment=20)
# Plot the data on the hodograph
mask = (p >= 100 * units.mbar)
h.plot_colormapped(u[mask], v[mask], windspeed[mask]) # Plot a line colored by wind speed
# Set some sensible axis limits
skew.ax.set_ylim(1000, 100)
skew.ax.set_xlim(-40, 60)
return fig, skew
def test_el_ml():
"""Test equilibrium layer calculation for a mixed parcel."""
levels = np.array([959., 779.2, 751.3, 724.3, 700., 400., 269.]) * units.mbar
temperatures = np.array([22.2, 14.6, 12., 9.4, 7., -25., -35.]) * units.celsius
dewpoints = np.array([19., -11.2, -10.8, -10.4, -10., -35., -53.2]) * units.celsius
__, t_mixed, td_mixed = mixed_parcel(levels, temperatures, dewpoints)
mixed_parcel_prof = parcel_profile(levels, t_mixed, td_mixed)
el_pressure, el_temperature = el(levels, temperatures, dewpoints, mixed_parcel_prof)
assert_almost_equal(el_pressure, 355.834 * units.mbar, 3)
assert_almost_equal(el_temperature, -28.371 * units.degC, 3)
def test_lfc_ml():
"""Test Mixed-Layer LFC calculation."""
levels = np.array([959., 779.2, 751.3, 724.3, 700., 269.]) * units.mbar
temperatures = np.array([22.2, 14.6, 12., 9.4, 7., -49.]) * units.celsius
dewpoints = np.array([19., -11.2, -10.8, -10.4, -10., -53.2]) * units.celsius
__, t_mixed, td_mixed = mixed_parcel(levels, temperatures, dewpoints)
mixed_parcel_prof = parcel_profile(levels, t_mixed, td_mixed)
lfc_pressure, lfc_temp = lfc(levels, temperatures, dewpoints, mixed_parcel_prof)
assert_almost_equal(lfc_pressure, 631.794 * units.mbar, 2)
assert_almost_equal(lfc_temp, -1.862 * units.degC, 2)
def plot_skewt_icon(sounding, parcel=None, base=1000, top=100, skew=45):
model_time = np.datetime_as_string(sounding.metadata.model_time, unit='m')
valid_time = np.datetime_as_string(sounding.metadata.valid_time, unit='m')
top_idx = find_closest_model_level(sounding.p * units.Pa, top * units("hPa"))
fig = plt.figure(figsize=(11, 11), constrained_layout=True)
skew = SkewT(fig, rotation=skew)
skew.plot(sounding.p * units.Pa, sounding.T * units.K, 'r')
skew.plot(sounding.p * units.Pa, sounding.Td, 'b')
skew.plot_barbs(sounding.p[:top_idx] * units.Pa, sounding.U[:top_idx] * units.mps,
sounding.V[:top_idx] * units.mps, plot_units=units.knot, alpha=0.6, xloc=1.13, x_clip_radius=0.3)
if parcel == "surface-based":
prof = mpcalc.parcel_profile(sounding.p * units.Pa, sounding.T[0] * units.K, sounding.Td[0]).to('degC')
skew.plot(sounding.p * units.Pa, prof, 'y', linewidth=2)
# Add the relevant special lines
skew.plot_dry_adiabats()
skew.plot_moist_adiabats()
skew.plot_mixing_lines()
skew.plot(sounding.p * units.Pa, np.zeros(len(sounding.p)) * units.degC, "#03d3fc", linewidth=1)
skew.ax.set_ylim(base, top)
plt.title(f"Model run: {model_time}Z", loc='left')
plt.title(f"Valid time: {valid_time}Z", fontweight='bold', loc='right')
plt.xlabel("Temperature [°C]")
plt.ylabel("Pressure [hPa]")
fig.suptitle(f"ICON-EU Model for {sounding.latitude_pretty}, {sounding.longitude_pretty}", fontsize=14)
ax1 = plt.gca()
ax2 = ax1.twinx() # instantiate a second axes that shares the same x-axis
color = '#333333'
ax2.set_ylabel('Geometric Altitude [kft]', color=color) # we already handled the x-label with ax1
ax2_data = (sounding.p * units.Pa).to('hPa')
ax2.plot(np.zeros(len(ax2_data)), ax2_data, color=color, alpha=0.0)
ax2.tick_params(axis='y', labelcolor=color)
ax2.set_yscale('log')
ax2.set_ylim((base, top))
ticks = np.linspace(base, top, num=10)
ideal_ticks = np.geomspace(base, top, 20)
real_tick_idxs = [find_closest_model_level(sounding.p * units.Pa, p_level * units("hPa")) for p_level in
ideal_ticks]
ticks = (sounding.p * units.Pa).to("hPa")[real_tick_idxs]
full_levels = [full_level_height(sounding.HHL, idx) for idx in real_tick_idxs]
tick_labels = np.around((full_levels * units.m).m_as("kft"), decimals=1)
ax2.set_yticks(ticks)
ax2.set_yticklabels(tick_labels)
ax2.minorticks_off()
return fig
def test_parcel_profile_below_lcl():
"""Test parcel profile calculation when pressures do not reach LCL (#827)."""
pressure = np.array([981, 949.2, 925., 913.9, 903, 879.4, 878, 864, 855,
850, 846.3, 838, 820, 814.5, 799, 794]) * units.hPa
truth = np.array([276.35, 273.76110242, 271.74910213, 270.81364639,
269.88711359, 267.85332225, 267.73145436, 266.5050728,
265.70916946, 265.264412, 264.93408677, 264.18931638,
262.55585912, 262.0516423, 260.61745662,
260.15057861]) * units.kelvin
profile = parcel_profile(pressure, 3.2 * units.degC, -10.8 * units.degC)
assert_almost_equal(profile, truth, 6)
def make_skewt():
# Get the data
date = request.args.get('date')
time = request.args.get('time')
region = request.args.get('region')
station = request.args.get('station')
date = datetime.strptime(date, '%Y%m%d')
date = datetime(date.year, date.month, date.day, int(time))
df = get_sounding_data(date, region, station)
p = df['pressure'].values * units(df.units['pressure'])
T = df['temperature'].values * units(df.units['temperature'])
Td = df['dewpoint'].values * units(df.units['dewpoint'])
u = df['u_wind'].values * units(df.units['u_wind'])
v = df['v_wind'].values * units(df.units['v_wind'])
# Make the Skew-T
fig = plt.figure(figsize=(9, 9))
add_metpy_logo(fig, 115, 100)
skew = SkewT(fig, rotation=45)
# Plot the data using normal plotting functions, in this case using
# log scaling in Y, as dictated by the typical meteorological plot
skew.plot(p, T, 'tab:red')
skew.plot(p, Td, 'tab:green')
skew.plot_barbs(p, u, v)
skew.ax.set_ylim(1000, 100)
skew.ax.set_xlim(-40, 60)
# Calculate LCL height and plot as black dot
lcl_pressure, lcl_temperature = mpcalc.lcl(p[0], T[0], Td[0])
skew.plot(lcl_pressure, lcl_temperature, 'ko', markerfacecolor='black')
# Calculate full parcel profile and add to plot as black line
prof = mpcalc.parcel_profile(p, T[0], Td[0]).to('degC')
skew.plot(p, prof, 'k', linewidth=2)
# Shade areas of CAPE and CIN
skew.shade_cin(p, T, prof)
skew.shade_cape(p, T, prof)
# An example of a slanted line at constant T -- in this case the 0
# isotherm
skew.ax.axvline(0, color='c', linestyle='--', linewidth=2)
# Add the relevant special lines
skew.plot_dry_adiabats()
skew.plot_moist_adiabats()
skew.plot_mixing_lines()
canvas = FigureCanvas(fig)
img = BytesIO()
fig.savefig(img)
img.seek(0)
return send_file(img, mimetype='image/png')
def calcMLCAPE(levels, temperature, dewpoint, depth=100.0 * units.hPa):
_, T_parc, Td_par = mixed_parcel(
levels,
temperature,
dewpoint,
depth=depth,
interpolate=False,
)
profile = parcel_profile(levels, T_parc, Td_parc)
cape, cin = cape_cin(levels, temperature, dewpoint, profile)
return cape
def thermo_plots(pressure, temperature, mixing_ratio):
""""
plots for vertical profiles of temperature, dewpoint, mixing ratio and relative humidity.
Parameters
----------
pressure : array-like
Atmospheric pressure profile (surface to TOA)
temperature: array-like
Atmospheric temperature profile (surface to TOA)
dewpoint: array-like
Atmospheric dewpoint profile (surface to TOA)
Returns
-------
"""
p = pressure * units('mbar')
q = mixing_ratio * units('kilogram/kilogram')
T = temperature * units('degC')
Td = mpcalc.dewpoint_from_specific_humidity(q, T, p) # dewpoint
Tp = mpcalc.parcel_profile(p, T[0], Td[0]) # parcel
plt.figure(figsize=(12, 5))
lev = find_nearest(p.magnitude, 100)
plt.subplot(1, 3, 1)
plt.plot(T[:lev], p[:lev], '-ob')
plt.plot(Td[:lev], p[:lev], '-og')
plt.plot(Tp[:lev], p[:lev], '-or')
plt.xlabel('Temperature [C]', fontsize=12)
plt.ylabel('Pressure [hpa]', fontsize=12)
plt.gca().invert_yaxis()
plt.legend(['Temp', 'Temp_Dew', 'Temp_Parcel'], loc=1)
plt.grid()
qs = mpcalc.mixing_ratio(mpcalc.saturation_vapor_pressure(T), p)
# Relative humidity
RH = q / qs * 100 # Relative humidity
plt.subplot(1, 3, 2)
plt.plot(q[:lev], p[:lev], '-og')
plt.xlabel('Mixing ratio [kg/kg]', fontsize=12)
plt.gca().invert_yaxis()
plt.grid()
plt.subplot(1, 3, 3)
plt.plot(RH[:lev], p[:lev], '-og')
plt.xlabel('Relative humiduty [%]', fontsize=12)
plt.gca().invert_yaxis()
plt.grid()
plt.tight_layout()
return (plt)
def get_cape(inargs, return_parcel_profile=False):
pres_prof, temp_prof, dp_prof = inargs
try:
prof = mpcalc.parcel_profile(pres_prof, temp_prof[0], dp_prof[0])
cape, cin = mpcalc.cape_cin(pres_prof, temp_prof, dp_prof, prof)
except Exception:
cape, cin, prof = np.NaN, np.NaN, np.NaN
print('Problem during CAPE-calculation. Likely NaN-related.')
if return_parcel_profile:
return cape, cin, prof
else:
return cape, cin
def plot_skewt(self, station_data):
"""
:param adjusted_data: receives the post processed dataframe
:param valid:
:return:
"""
# We will pull the data out of the example dataset into individual variables
# and assign units.
p = station_data['pressure'].values * units.hPa
T = station_data['Temperature_isobaric'].values * units.degC
Td = station_data['Dewpoint'].replace(np.nan,
0.0000001).values * units.degC
u = station_data['u-component_of_wind_isobaric'].values * \
units('meters / second').to('knots')
v = station_data['v-component_of_wind_isobaric'].values * \
units('meters / second').to('knots')
# Create a new figure. The dimensions here give a good aspect ratio.
fig = plt.figure(figsize=(12, 9))
skew = SkewT(fig, rotation=45)
# Plot the data using normal plotting functions, in this case using
# log scaling in Y, as dictated by the typical meteorological plot
skew.plot(p, T, 'r')
skew.plot(p, Td, 'g')
skew.plot_barbs(p, u, v)
skew.ax.set_ylim(1020, 100)
skew.ax.set_xlim(-40, 60)
# Calculate LCL height and plot as black dot
lcl_pressure, lcl_temperature = mpcalc.lcl(p[0], T[0], Td[0])
skew.plot(lcl_pressure, lcl_temperature, 'ko', markerfacecolor='black')
# Calculate full parcel profile and add to plot as black line
prof = mpcalc.parcel_profile(p, T[0], Td[0])
skew.plot(p, prof, 'k', linewidth=2)
# An example of a slanted line at constant T -- in this case the 0
# isotherm
skew.ax.axvline(0, color='c', linestyle='--', linewidth=2)
# Add the relevant special lines
skew.plot_dry_adiabats()
skew.plot_moist_adiabats()
skew.plot_mixing_lines()
skew.shade_cape(p, T, prof)
skew.shade_cin(p, T, prof)
return skew
def core(p, T, Td, u, v, **kwargs):
# Calculate the LCL
lcl_pressure, lcl_temperature = mpcalc.lcl(p[0], T[0], Td[0])
#print('LCL p, t:', int(lcl_pressure), int(lcl_temperature))
# Calculate the parcel profile.
parcel_prof = mpcalc.parcel_profile(p, T[0], Td[0]).to('degC')
# Create a new figure. The dimensions here give a good aspect ratio
fig = plt.figure(figsize=(8, 8))
skew = SkewT(fig, rotation=45)
# Plot the data using normal plotting functions, in this case using
# log scaling in Y, as dictated by the typical meteorological plot
#skew.plot(p, T, 'k-')
skew.plot(p, T, 'r.-', ms=5, lw=2, label='mean T')
skew.plot(p, Td, 'g.-', ms=5, lw=2, label='mean Td')
skew.plot_barbs(p, u, v)
skew.ax.set_ylim(1000, 180)
skew.ax.set_xlim(-20, 40)
# Plot LCL temperature as black dot
skew.plot(lcl_pressure, lcl_temperature, 'k.', markerfacecolor='black')
# Plot the parcel profile as a black line
skew.plot(p, parcel_prof, 'k', linewidth=2)
# Shade areas of CAPE and CIN
skew.shade_cin(p, T, parcel_prof)
skew.shade_cape(p, T, parcel_prof)
# Plot a zero degree isotherm
skew.ax.axvline(0, color='c', linestyle='--', linewidth=2)
# Add the relevant special lines
skew.plot_dry_adiabats(lw=.5)
skew.plot_moist_adiabats(lw=.5)
skew.plot_mixing_lines(lw=.5)
# Show the plot
#plt.show()
#skew.ax.set_title(time_str)
plt.legend(loc='lower left')
plt.title(kwargs.get('title'))
fname = kwargs.get('saveto', 'profile.png')
fig.savefig(fname)
print(fname, 'saved.')
plt.close()
def plot_skewt(df):
# We will pull the data out of the example dataset into individual variables
# and assign units.
hght = df['height'].values * units.hPa
p = df['pressure'].values * units.hPa
T = df['temperature'].values * units.degC
Td = df['dewpoint'].values * units.degC
wind_speed = df['speed'].values * units.knots
wind_dir = df['direction'].values * units.degrees
u, v = mpcalc.wind_components(wind_speed, wind_dir)
# Create a new figure. The dimensions here give a good aspect ratio.
fig = plt.figure(figsize=(9, 12))
skew = SkewT(fig, rotation=45)
# Plot the data using normal plotting functions, in this case using
# log scaling in Y, as dictated by the typical meteorological plot
skew.plot(p, T, 'r')
skew.plot(p, Td, 'g')
skew.plot_barbs(p, u, v)
skew.ax.set_ylim(1000, 100)
skew.ax.set_xlim(-40, 60)
# Calculate LCL height and plot as black dot
lcl_pressure, lcl_temperature = mpcalc.lcl(p[0], T[0], Td[0])
skew.plot(lcl_pressure, lcl_temperature, 'ko', markerfacecolor='black')
# Calculate full parcel profile and add to plot as black line
prof = mpcalc.parcel_profile(p, T[0], Td[0]).to('degC')
skew.plot(p, prof, 'k', linewidth=2)
# An example of a slanted line at constant T -- in this case the 0
# isotherm
skew.ax.axvline(0, color='c', linestyle='--', linewidth=2)
# Add the relevant special lines
skew.plot_dry_adiabats()
skew.plot_moist_adiabats()
skew.plot_mixing_lines()
# Create a hodograph
ax_hod = inset_axes(skew.ax, '40%', '40%', loc=2)
h = Hodograph(ax_hod, component_range=80.)
h.add_grid(increment=20)
h.plot_colormapped(u, v, hght)
return skew
def plot_skewt(p, t, td, puv=None, u=None, v=None, title=None, outfile=None):
# Create a new figure. The dimensions here give a good aspect ratio
fig = plt.figure(figsize=(9, 9))
skew = SkewT(fig, rotation=30)
# Plot the data using normal plotting functions, in this case using
# log scaling in Y, as dictated by the typical meteorological plot
skew.plot(p, t, 'r', linewidth=2)
skew.plot(p, td, 'g', linewidth=2)
if u is not None and v is not None:
skew.plot_barbs(puv, u, v)
skew.ax.set_ylim(1000, 100)
skew.ax.set_xlim(-40, 60)
# Calculate the LCL
lcl_pressure, lcl_temperature = mpcalc.lcl(p[0], t[0], td[0])
# Calculate the parcel profile.
parcel_prof = mpcalc.parcel_profile(p, t[0], td[0]).to('degC')
# Plot LCL temperature as black dot
skew.plot(lcl_pressure, lcl_temperature, 'ko', markerfacecolor='black')
# Plot the parcel profile as a black line
skew.plot(p, parcel_prof, 'k--', linewidth=1)
# Shade areas of CAPE and CIN
skew.shade_cin(p, t, parcel_prof)
skew.shade_cape(p, t, parcel_prof)
# Plot a zero degree isotherm
#skew.ax.axvline(0, color='c', linestyle='--', linewidth=2)
# Add the relevant special lines
skew.plot_dry_adiabats()
skew.plot_moist_adiabats()
skew.plot_mixing_lines()
if title is not None:
plt.title(title)
# Show the plot
#plt.show()
if outfile is None: outfile = 'skewt.png'
fig.savefig(outfile, format='png')
def getData(self, time, model_vars, mdl2stnd, previous_data=None):
'''
Name:
awips_model_base
Purpose:
A function to get data from NAM40 model to create HDWX products
Inputs:
request : A DataAccessLayer request object
time : List of datatime(s) for data to grab
model_vars : Dictionary with variables/levels to get
mdl2stnd : Dictionary to convert from model variable names
to standardized names
Outputs:
Returns a dictionary containing all data
Keywords:
previous_data : Dictionary with data from previous time step
'''
log = logging.getLogger(__name__)
# Set up function for logger
initTime, fcstTime = get_init_fcst_times(time[0])
data = {
'model': self._request.getLocationNames()[0],
'initTime': initTime,
'fcstTime': fcstTime
}
# Initialize empty dictionary
log.info('Attempting to download {} data'.format(data['model']))
for var in model_vars: # Iterate over variables in the vars list
log.debug('Getting: {}'.format(var))
self._request.setParameters(*model_vars[var]['parameters'])
# Set parameters for the download request
self._request.setLevels(*model_vars[var]['levels'])
# Set levels for the download request
response = DAL.getGridData(self._request, time) # Request the data
for res in response: # Iterate over all data request responses
varName = res.getParameter()
# Get name of the variable in the response
varLvl = res.getLevel()
# Get level of the variable in the response
varName = mdl2stnd[varName]
# Convert variable name to local standarized name
if varName not in data:
data[varName] = {}
# If variable name NOT in data dictionary, initialize new dictionary under key
data[varName][varLvl] = res.getRawData()
# Add data under level name
try: # Try to
unit = units(res.getUnit())
# Get units and convert to MetPy units
except: # On exception
unit = '?'
# Set units to ?
else: # If get units success
data[varName][varLvl] *= unit
# Get data and create MetPy quantity by multiplying by units
log.debug(
'Got data for:\n Var: {}\n Lvl: {}\n Unit: {}'.format(
varName, varLvl, unit))
data['lon'], data['lat'] = res.getLatLonCoords()
# Get latitude and longitude values
data['lon'] *= units('degree')
# Add units of degree to longitude
data['lat'] *= units('degree')
# Add units of degree to latitude
# Absolute vorticity
dx, dy = lat_lon_grid_deltas(data['lon'], data['lat'])
# Get grid spacing in x and y
uTag = mdl2stnd[model_vars['wind']['parameters'][0]]
# Get initial tag name for u-wind
vTag = mdl2stnd[model_vars['wind']['parameters'][1]]
# Get initial tag name for v-wind
if (uTag in data) and (
vTag in data): # If both tags are in the data structure
data['abs_vort'] = {}
# Add absolute vorticity key
for lvl in model_vars['wind'][
'levels']: # Iterate over all leves in the wind data
if (lvl in data[uTag]) and (
lvl in data[vTag]
): # If given level in both u- and v-wind dictionaries
log.debug('Computing absolute vorticity at {}'.format(lvl))
data['abs_vort'][ lvl ] = \
absolute_vorticity( data[uTag][lvl], data[vTag][lvl],
dx, dy, data['lat'] )
# Compute absolute vorticity
# 1000 MB equivalent potential temperature
if ('temperature' in data) and (
'dewpoint'
in data): # If temperature AND depoint data were downloaded
data['theta_e'] = {}
T, Td = 'temperature', 'dewpoint'
if ('1000.0MB' in data[T]) and (
'1000.0MB' in data[Td]
): # If temperature AND depoint data were downloaded
log.debug(
'Computing equivalent potential temperature at 1000 hPa')
data['theta_e']['1000.0MB'] = equivalent_potential_temperature(
1000.0 * units('hPa'), data[T]['1000.0MB'],
data[Td]['1000.0MB'])
return data
# MLCAPE
log.debug('Computing mixed layer CAPE')
T_lvl = list(data[T].keys())
Td_lvl = list(data[Td].keys())
levels = list(set(T_lvl).intersection(Td_lvl))
levels = [float(lvl.replace('MB', '')) for lvl in levels]
levels = sorted(levels, reverse=True)
nLvl = len(levels)
if nLvl > 0:
log.debug(
'Found {} matching levels in temperature and dewpoint data'
.format(nLvl))
nLat, nLon = data['lon'].shape
data['MLCAPE'] = np.zeros((
nLat,
nLon,
), dtype=np.float32) * units('J/kg')
TT = np.zeros((
nLvl,
nLat,
nLon,
), dtype=np.float32) * units('degC')
TTd = np.zeros((
nLvl,
nLat,
nLon,
), dtype=np.float32) * units('degC')
log.debug('Sorting temperature and dewpoint data by level')
for i in range(nLvl):
key = '{:.1f}MB'.format(levels[i])
TT[i, :, :] = data[T][key].to('degC')
TTd[i, :, :] = data[Td][key].to('degC')
levels = np.array(levels) * units.hPa
depth = 100.0 * units.hPa
log.debug('Iterating over grid boxes to compute MLCAPE')
for j in range(nLat):
for i in range(nLon):
try:
_, T_parc, Td_parc = mixed_parcel(
levels,
TT[:, j, i],
TTd[:, j, i],
depth=depth,
interpolate=False,
)
profile = parcel_profile(levels, T_parc, Td_parc)
cape, cin = cape_cin(levels, TT[:, j, i],
TTd[:, j, i], profile)
except:
log.warning(
'Failed to compute MLCAPE for lon/lat: {}; {}'.
format(data['lon'][j, i], data['lat'][j, i]))
else:
data['MLCAPE'][j, i] = cape
return data
skew.plot_dry_adiabats()
skew.plot_moist_adiabats()
skew.plot_mixing_lines()
plt.show()
# Calculate LCL height and plot as black dot\n",
from metpy.calc import lcl, dry_lapse
from metpy.units import units, concatenate
l = lcl(p[0], T[0], Td[0]) # we can calculate the lcl level from the starting p, T, Td
lcl_temp = dry_lapse(concatenate((p[0], l)), T[0])[-1].to('degC') # Temperature of the lcl using the dry lapse
skew.plot(l, lcl_temp, 'ko', markerfacecolor='black') # plot the lcl level on the temperature with a black circle (ko) filled
# Calculate full parcel profile and add to plot as black line\n",
from metpy.calc import parcel_profile
prof = parcel_profile(p, T[0], Td[0]).to('degC')
skew.plot(p, prof, 'k', linewidth=2)
# Example of coloring area between profiles
skew.ax.fill_betweenx(p, T, prof, where=T>= prof, facecolor='blue', alpha=0.4)
skew.ax.fill_betweenx(p, T, prof, where=T< prof, facecolor='red', alpha=0.4)
# # An example of a slanted line at constant T -- in this case the 0 isotherm
level = skew.ax.axvline(0, color='c', linestyle='--', linewidth=2) # highligh the 0 degree isoterm
from metpy.plots import Hodograpgh
fig, ax = plt.subplot(1, 1)
hodo = Hodograph(ax)
hodo.plot(u,v)
hodo.add_grid()
# Often times we will want to calculate some thermodynamic parameters of a
# sounding. The MetPy calc module has many such calculations already implemented!
#
# * **Lifting Condensation Level (LCL)** - The level at which an air parcel's
# relative humidity becomes 100% when lifted along a dry adiabatic path.
# * **Parcel Path** - Path followed by a hypothetical parcel of air, beginning
# at the surface temperature/pressure and rising dry adiabatically until
# reaching the LCL, then rising moist adiabatically.
# Calculate the LCL
lcl_pressure, lcl_temperature = mpcalc.lcl(p[0], T[0], Td[0])
print(lcl_pressure, lcl_temperature)
# Calculate the parcel profile.
parcel_prof = mpcalc.parcel_profile(p, T[0], Td[0]).to('degC')
##########################################################################
# Skew-T Plotting
# ------------------------
#
# Fiducial lines indicating dry adiabats, moist adiabats, and mixing ratio are
# useful when performing further analysis on the Skew-T diagram. Often the
# 0C isotherm is emphasized and areas of CAPE and CIN are shaded.
# Create a new figure. The dimensions here give a good aspect ratio
fig = plt.figure(figsize=(9, 9))
skew = SkewT(fig, rotation=30)
# Plot the data using normal plotting functions, in this case using
# log scaling in Y, as dictated by the typical meteorological plot
def calculate_stability_indicies(ds, temp_name="temperature",
td_name="dewpoint_temperature",
p_name="pressure",
moving_ave_window=0):
"""
Function for calculating stability indices from sounding data.
Parameters
----------
ds : ACT dataset
The dataset to compute the stability indicies of. Must have
temperature, dewpoint, and pressure in vertical coordinates.
temp_name : str
The name of the temperature field.
td_name : str
The name of the dewpoint field.
p_name : str
The name of the pressure field.
moving_ave_window : int
Number of points to do a moving average on sounding data to reduce
noise. This is useful if noise in the sounding is preventing parcel
ascent.
Returns
-------
ds : ACT dataset
An ACT dataset with additional stability indicies added.
"""
if not METPY_AVAILABLE:
raise ImportError("MetPy need to be installed on your system to " +
"calculate stability indices")
t = ds[temp_name]
td = ds[td_name]
p = ds[p_name]
if not hasattr(t, "units"):
raise AttributeError("Temperature field must have units" +
" for ACT to discern!")
if not hasattr(td, "units"):
raise AttributeError("Dewpoint field must have units" +
" for ACT to discern!")
if not hasattr(p, "units"):
raise AttributeError("Pressure field must have units" +
" for ACT to discern!")
if t.units == "C":
t_units = units.degC
else:
t_units = getattr(units, t.units)
if td.units == "C":
td_units = units.degC
else:
td_units = getattr(units, td.units)
p_units = getattr(units, p.units)
# Sort all values by decreasing pressure
t_sorted = np.array(t.values)
td_sorted = np.array(td.values)
p_sorted = np.array(p.values)
ind_sort = np.argsort(p_sorted)
t_sorted = t_sorted[ind_sort[-1:0:-1]]
td_sorted = td_sorted[ind_sort[-1:0:-1]]
p_sorted = p_sorted[ind_sort[-1:0:-1]]
if moving_ave_window > 0:
t_sorted = np.convolve(
t_sorted, np.ones((moving_ave_window,)) / moving_ave_window)
td_sorted = np.convolve(
td_sorted, np.ones((moving_ave_window,)) / moving_ave_window)
p_sorted = np.convolve(
p_sorted, np.ones((moving_ave_window,)) / moving_ave_window)
t_sorted = t_sorted * t_units
td_sorted = td_sorted * td_units
p_sorted = p_sorted * p_units
t_profile = mpcalc.parcel_profile(
p_sorted, t_sorted[0], td_sorted[0])
# Calculate parcel trajectory
ds["parcel_temperature"] = t_profile.magnitude
ds["parcel_temperature"].attrs['units'] = t_profile.units
# Calculate CAPE, CIN, LCL
sbcape, sbcin = mpcalc.surface_based_cape_cin(
p_sorted, t_sorted, td_sorted)
lcl = mpcalc.lcl(
p_sorted[0], t_sorted[0], td_sorted[0])
try:
lfc = mpcalc.lfc(
p_sorted[0], t_sorted[0], td_sorted[0])
except IndexError:
lfc = np.nan * p_sorted.units
mucape, mucin = mpcalc.most_unstable_cape_cin(
p_sorted, t_sorted, td_sorted)
where_500 = np.argmin(np.abs(p_sorted - 500 * units.hPa))
li = t_sorted[where_500] - t_profile[where_500]
ds["surface_based_cape"] = sbcape.magnitude
ds["surface_based_cape"].attrs['units'] = "J/kg"
ds["surface_based_cape"].attrs['long_name'] = "Surface-based CAPE"
ds["surface_based_cin"] = sbcin.magnitude
ds["surface_based_cin"].attrs['units'] = "J/kg"
ds["surface_based_cin"].attrs['long_name'] = "Surface-based CIN"
ds["most_unstable_cape"] = mucape.magnitude
ds["most_unstable_cape"].attrs['units'] = "J/kg"
ds["most_unstable_cape"].attrs['long_name'] = "Most unstable CAPE"
ds["most_unstable_cin"] = mucin.magnitude
ds["most_unstable_cin"].attrs['units'] = "J/kg"
ds["most_unstable_cin"].attrs['long_name'] = "Most unstable CIN"
ds["lifted_index"] = li.magnitude
ds["lifted_index"].attrs['units'] = t_profile.units
ds["lifted_index"].attrs['long_name'] = "Lifted index"
ds["level_of_free_convection"] = lfc.magnitude
ds["level_of_free_convection"].attrs['units'] = lfc.units
ds["level_of_free_convection"].attrs['long_name'] = "Level of free convection"
ds["lifted_condensation_level_temperature"] = lcl[1].magnitude
ds["lifted_condensation_level_temperature"].attrs['units'] = lcl[1].units
ds["lifted_condensation_level_temperature"].attrs['long_name'] = "Lifted condensation level temperature"
ds["lifted_condensation_level_pressure"] = lcl[0].magnitude
ds["lifted_condensation_level_pressure"].attrs['units'] = lcl[0].units
ds["lifted_condensation_level_pressure"].attrs['long_name'] = "Lifted condensation level pressure"
return ds
def plot_upper_air(station='11035', date=False):
'''
-----------------------------
Default use of plot_upper_air:
This will plot a SkewT sounding for station '11035' (Wien Hohe Warte)
plot_upper_air(station='11035', date=False)
'''
# sns.set(rc={'axes.facecolor':'#343837', 'figure.facecolor':'#343837',
# 'grid.linestyle':'','axes.labelcolor':'#04d8b2','text.color':'#04d8b2',
# 'xtick.color':'#04d8b2','ytick.color':'#04d8b2'})
# Get time in UTC
station = str(station)
if date is False:
now = datetime.utcnow()
# If morning then 0z sounding, otherwise 12z
if now.hour < 12:
hour = 0
else:
hour = 12
date = datetime(now.year, now.month, now.day, hour)
datestr = date.strftime('%Hz %Y-%m-%d')
print('{}'.format(date))
else:
year = int(input('Please specify the year: '))
month = int(input('Please specify the month: '))
day = int(input('Please specify the day: '))
hour = int(input('Please specify the hour: '))
if hour < 12:
hour = 0
else:
hour = 12
date = datetime(year, month, day, hour)
datestr = date.strftime('%Hz %Y-%m-%d')
print('You entered {}'.format(date))
# This requests the data 11035 is
df = WyomingUpperAir.request_data(date, station)
# Create single variables wih the right units
p = df['pressure'].values * units.hPa
T = df['temperature'].values * units.degC
Td = df['dewpoint'].values * units.degC
wind_speed = df['speed'].values * units.knots
wind_dir = df['direction'].values * units.degrees
wind_speed_6k = df['speed'][df.height <= 6000].values * units.knots
wind_dir_6k = df['direction'][df.height <= 6000].values * units.degrees
u, v = mpcalc.get_wind_components(wind_speed, wind_dir)
u6, v6 = mpcalc.get_wind_components(wind_speed_6k, wind_dir_6k)
# Calculate the LCL
lcl_pressure, lcl_temperature = mpcalc.lcl(p[0], T[0], Td[0])
print(lcl_pressure, lcl_temperature)
# Calculate the parcel profile.
parcel_prof = mpcalc.parcel_profile(p, T[0], Td[0]).to('degC')
cape, cin = mpcalc.cape_cin(p, T, Td, parcel_prof)
#############################
# Create a new figure. The dimensions here give a good aspect ratio
fig = plt.figure(figsize=(9, 9))
gs = gridspec.GridSpec(3, 3)
skew = SkewT(fig, rotation=45, subplot=gs[:, :2])
# Plot the data using normal plotting functions, in this case using
# log scaling in Y, as dictated by the typical meteorological plot
skew.plot(p, T, 'r')
skew.plot(p, Td, 'g')
skew.plot_barbs(p, u, v)
skew.ax.set_ylim(1000, 100)
skew.ax.set_xlim(-45, 40)
# Plot LCL as black dot
skew.plot(lcl_pressure, lcl_temperature, 'ko', markerfacecolor='black')
# Plot the parcel profile as a black line
skew.plot(p, parcel_prof, 'k', linewidth=2)
# Shade areas of CAPE and CIN
skew.shade_cin(p, T, parcel_prof)
skew.shade_cape(p, T, parcel_prof)
# Plot a zero degree isotherm
skew.ax.axvline(0, color='c', linestyle='--', linewidth=2)
skew.ax.set_title('Station: ' + str(station) + '\n' + datestr) # set title
skew.ax.set_xlabel('Temperature (C)')
skew.ax.set_ylabel('Pressure (hPa)')
# Add the relevant special lines
skew.plot_dry_adiabats(linewidth=0.7)
skew.plot_moist_adiabats(linewidth=0.7)
skew.plot_mixing_lines(linewidth=0.7)
# Create a hodograph
# Create an inset axes object that is 40% width and height of the
# figure and put it in the upper right hand corner.
# ax_hod = inset_axes(skew.ax, '40%', '40%', loc=1)
ax = fig.add_subplot(gs[0, -1])
h = Hodograph(ax, component_range=60.)
h.add_grid(increment=20)
# Plot a line colored by windspeed
h.plot_colormapped(u6, v6, wind_speed_6k)
# add another subplot for the text of the indices
# ax_t = fig.add_subplot(gs[1:,2])
skew2 = SkewT(fig, rotation=0, subplot=gs[1:, 2])
skew2.plot(p, T, 'r')
skew2.plot(p, Td, 'g')
# skew2.plot_barbs(p, u, v)
skew2.ax.set_ylim(1000, 700)
skew2.ax.set_xlim(-30, 10)
# Show the plot
plt.show()
return cape
def plot(self, t, td, p, u, v, lat, long, time):
r"""Displays the Skew-T data on a matplotlib figure.
Args:
t (array-like): A list of temperature values.
td (array-like): A list of dewpoint values.
p (array-like): A list of pressure values.
u (array-like): A list of u-wind component values.
v (array-like): A list of v-wind component values.
lat (string): A string containing the requested latitude value.
long (string): A string containing the requested longitude value.
time (string): A string containing the UTC time requested with seconds truncated.
Returns:
None.
Raises:
None.
"""
# Create a new figure. The dimensions here give a good aspect ratio
self.skew = SkewT(self.figure, rotation=40)
# Plot the data using normal plotting functions, in this case using
# log scaling in Y, as dictated by the typical meteorological plot
self.skew.plot(p, t, 'r')
self.skew.plot(p, td, 'g')
self.skew.plot_barbs(p, u, v, barbcolor='#FF0000', flagcolor='#FF0000')
self.skew.ax.set_ylim(1000, 100)
self.skew.ax.set_xlim(-40, 60)
# Axis colors
self.skew.ax.tick_params(axis='x', colors='#A3A3A4')
self.skew.ax.tick_params(axis='y', colors='#A3A3A4')
# Calculate LCL height and plot as black dot
l = lcl(p[0], t[0], td[0])
lcl_temp = dry_lapse(concatenate((p[0], l)), t[0])[-1].to('degC')
self.skew.plot(l, lcl_temp, 'ko', markerfacecolor='black')
# Calculate full parcel profile and add to plot as black line
prof = parcel_profile(p, t[0], td[0]).to('degC')
self.skew.plot(p, prof, 'k', linewidth=2)
# Color shade areas between profiles
self.skew.ax.fill_betweenx(p, t, prof, where=t >= prof, facecolor='#5D8C53', alpha=0.7)
self.skew.ax.fill_betweenx(p, t, prof, where=t < prof, facecolor='#CD6659', alpha=0.7)
# Add the relevant special lines
self.skew.plot_dry_adiabats()
self.skew.plot_moist_adiabats()
self.skew.plot_mixing_lines()
# Set title
deg = u'\N{DEGREE SIGN}'
self.skew.ax.set_title('Sounding for ' + lat + deg + ', ' + long + deg + ' at ' + time + 'z', y=1.02,
color='#A3A3A4')
# Discards old graph, works poorly though
# skew.ax.hold(False)
# Figure and canvas widgets that display the figure in the GUI
# set canvas size to display Skew-T appropriately
self.canvas.setMaximumSize(QtCore.QSize(800, 2000))
# refresh canvas
self.canvas.draw()
def cape(filelist,storm,track,show):
#Sort filelist.
filelist=np.sort(filelist)
# Get sampling periods (this will be a dictionary). See the toolbox
print('Retrieving sampling periods')
sampleperiods=getsamplingperiods(filelist,3.)
# Iterate over all sampling periods.
for sampindex,periodskey in enumerate(sampleperiods):
#Allocate starting (stdt) and ending date (endt). Remeber dt is the convetional short-name for date.
stdt=periodskey
endt=sampleperiods[periodskey]
# Define sampling period string
period=str(stdt.hour)+'_'+str(stdt.day)+'-'+str(endt.hour)+'_'+str(endt.day)
# Create new-empty lists.
lats=[]
lons=[]
xs=[]
ys=[]
capes=[]
cins=[]
distfig = plt.figure(figsize=(13, 9))
ax=distfig.add_subplot(111)
print('start filelist loop')
# Iterate over all files.
for filename in filelist:
# Select end-name of file by inspecting filename string. Notice how filename can change how file is read.
if 'radazm' in filename.split('/')[-1] or 'eol' in filename.split('/')[-1]:
end='radazm'
else:
end='avp'
# Obtain properties of file, i.e., launch time and location into a dictionary (dicc).
dicc=findproperties(filename,end)
# Condition to see if current file is in sampling period.
# Notice how if structure is constructed, condition finds times outside of sampling period and
# if found outside the sampling period, continue to next file.
if dicc['Launch Time']<stdt or dicc['Launch Time'] > endt:
continue
nump=np.genfromtxt(filename,skip_header=16,skip_footer=0)
temperature=clean1(nump[:,5])
pressure=clean1(nump[:,4])
Height=clean1(nump[:,13])
if np.nanmax(Height)<3500:
continue
#Clean for cape
RelH=clean1(nump[:,7])
lon=clean1(nump[:,14])
lat=clean1(nump[:,15])
lon=clean1(lon)
lat=clean1(lat)
mlon=np.nanmean(lon)
mlat=np.nanmean(lat)
RH=RelH/100
T,P,rh,dz=cleanforcape(temperature,pressure,RH,Height)
#Metpy set-up
T=np.flip(T,0)
rh=np.flip(rh,0)
p=np.flip(P,0)
dz=np.flip(dz,0)
p=p*units.hPa
T=T*units.celsius
mixing=rh*mpcalc.saturation_mixing_ratio(p,T)
epsilon=0.6219800858985514
Tv=mpcalc.virtual_temperature(T, mixing,
molecular_weight_ratio=epsilon)
dwpoint=mpcalc.dewpoint_rh(T, rh)
blh_indx=np.where(dz<500)
try:
parcelprofile=mpcalc.parcel_profile(p,np.nanmean(T[blh_indx])*units.celsius,mpcalc.dewpoint_rh(np.nanmean(T[blh_indx])*units.celsius, np.nanmean(rh[blh_indx]))).to('degC')
Tv_parcelprofile=mpcalc.virtual_temperature(parcelprofile, mixing,
molecular_weight_ratio=epsilon)
cape,cin=cape_cin(p,Tv,dwpoint,Tv_parcelprofile,dz,T)
except:
continue
plotskewT=True
if plotskewT==True:
os.system('mkdir figs/skewt')
fig = plt.figure(figsize=(9, 9))
skew = SkewT(fig, rotation=45)
skew.ax.set_ylim(1000, 100)
skew.ax.set_xlim(-40, 60)
skew.plot(p, dwpoint, 'g',label=r'$T_{dp}$')
skew.plot(p, Tv, 'r',label=r'$T_v$')
plt.text(-120,120,str(np.around(cape,2)),fontsize=14,fontweight='bold')
# Plot the data using normal plotting functions, in this case using
# log scaling in Y, as dictated by the typical meteorological plot
skew.plot(p,Tv_parcelprofile,'k',label=r'$T_{v env}$')
skew.shade_cin(p, T, parcelprofile,label='CIN')
skew.shade_cape(p, Tv, Tv_parcelprofile,label='CAPE')
skew.plot_dry_adiabats()
skew.plot_moist_adiabats()
plt.legend()
plt.title(storm + ' on' + period,fontsize=14)
plt.savefig('figs/skewt/'+storm+str(dicc['Launch Time'].time())+'.png')
#plt.show()
plt.close()
r,theta=cart_to_cylindr(mlon,mlat,track,dicc['Launch Time'])
if not(np.isnan(r)) and not(np.isnan(theta)) and not(np.isnan(cape.magnitude)):
xs.append(r*np.cos(theta))
ys.append(r*np.sin(theta))
capes.append(cape.magnitude)
cins.append(cin)
cs=ax.scatter(xs,ys,c=np.asarray(capes),cmap='jet')
for i,xi in enumerate(xs):
ax.text(xi,ys[i]+10,str(np.around(capes[i],1)))
plt.colorbar(cs)
ax.scatter(0,0,marker='v',s=100,color='black')
ax.grid()
ax.set_xlabel('X distance [km]')
ax.set_ylabel('Y distance [km]')
ax.set_title('CAPE distribution for '+storm+' on '+period,fontsize=14)
distfig.savefig('figs/cape'+storm+period+'.png')
if show:
plt.show()
# Plot the data using normal plotting functions, in this case using
# log scaling in Y, as dictated by the typical meteorological plot
skew.plot(p, T, 'r')
skew.plot(p, Td, 'g')
skew.plot_barbs(p, u, v)
skew.ax.set_ylim(1000, 100)
skew.ax.set_xlim(-40, 60)
# Calculate LCL height and plot as black dot
l = lcl(p[0], C2K(T[0]), C2K(Td[0]))
skew.plot(l, K2C(dry_lapse(l, C2K(T[0]), p[0])), 'ko',
markerfacecolor='black')
# Calculate full parcel profile and add to plot as black line
prof = K2C(parcel_profile(p, C2K(T[0]), C2K(Td[0])))
skew.plot(p, prof, 'k', linewidth=2)
# Example of coloring area between profiles
skew.ax.fill_betweenx(p, T, prof, where=T>=prof, facecolor='blue', alpha=0.4)
skew.ax.fill_betweenx(p, T, prof, where=T<prof, facecolor='red', alpha=0.4)
# An example of a slanted line at constant T -- in this case the 0
# isotherm
l = skew.ax.axvline(0, color='c', linestyle='--', linewidth=2)
# Add the relevant special lines
skew.plot_dry_adiabats()
skew.plot_moist_adiabats()
skew.plot_mixing_lines()
def main():
img_dir = Path("hail_plots/soundings/")
if not img_dir.exists():
img_dir.mkdir(parents=True)
data_dir = Path("/HOME/huziy/skynet3_rech1/hail/soundings_from_erai/")
# dates = [datetime(1991, 9, 7), datetime(1991, 9, 7, 6), datetime(1991, 9, 7, 12), datetime(1991, 9, 7, 18),
# datetime(1991, 9, 8, 0), datetime(1991, 9, 8, 18)]
#
# dates.extend([datetime(1991, 9, 6, 0), datetime(1991, 9, 6, 6), datetime(1991, 9, 6, 12), datetime(1991, 9, 6, 18)])
#
# dates = [datetime(1990, 7, 7), datetime(2010, 7, 12), datetime(1991, 9, 8, 0)]
dates_s = """
- 07/09/1991 12:00
- 07/09/1991 18:00
- 08/09/1991 00:00
- 08/09/1991 06:00
- 08/09/1991 12:00
- 13/09/1991 12:00
- 13/09/1991 18:00
- 14/09/1991 00:00
- 14/09/1991 06:00
- 14/09/1991 12:00
"""
dates = [datetime.strptime(line.strip()[1:].strip(), "%d/%m/%Y %H:%M") for line in dates_s.split("\n") if line.strip() != ""]
def __date_parser(s):
return pd.datetime.strptime(s, '%Y-%m-%d %H:%M:%S')
tt = pd.read_csv(data_dir.joinpath("TT.csv"), index_col=0, parse_dates=['Time'])
uu = pd.read_csv(data_dir.joinpath("UU.csv"), index_col=0, parse_dates=['Time'])
vv = pd.read_csv(data_dir.joinpath("VV.csv"), index_col=0, parse_dates=['Time'])
hu = pd.read_csv(data_dir.joinpath("HU.csv"), index_col=0, parse_dates=['Time'])
print(tt.head())
print([c for c in tt])
print(list(tt.columns.values))
temp_perturbation_degc = 0
for the_date in dates:
p = np.array([float(c) for c in tt])
fig = plt.figure(figsize=(9, 9))
skew = SkewT(fig)
skew.ax.set_ylim(1000, 100)
skew.ax.set_xlim(-40, 60)
tsel = tt.select(lambda d: d == the_date)
usel = uu.select(lambda d: d == the_date)
vsel = vv.select(lambda d: d == the_date)
husel = hu.select(lambda d: d == the_date)
tvals = tsel.values.mean(axis=0)
uvals = usel.values.mean(axis=0) * mul_mpers_per_knot
vvals = vsel.values.mean(axis=0) * mul_mpers_per_knot
huvals = husel.values.mean(axis=0) * units("g/kg")
# ignore the lowest level
all_vars = [p, tvals, uvals, vvals, huvals]
for i in range(len(all_vars)):
all_vars[i] = all_vars[i][:-5]
p, tvals, uvals, vvals, huvals = all_vars
assert len(p) == len(huvals)
tdvals = calc.dewpoint(calc.vapor_pressure(p * units.mbar, huvals).to(units.mbar))
print(tvals, tdvals)
# Calculate full parcel profile and add to plot as black line
parcel_profile = calc.parcel_profile(p[::-1] * units.mbar, (tvals[-1] + temp_perturbation_degc) * units.degC, tdvals[-1]).to('degC')
parcel_profile = parcel_profile[::-1]
skew.plot(p, parcel_profile, 'k', linewidth=2)
# Example of coloring area between profiles
greater = tvals * units.degC >= parcel_profile
skew.ax.fill_betweenx(p, tvals, parcel_profile, where=greater, facecolor='blue', alpha=0.4)
skew.ax.fill_betweenx(p, tvals, parcel_profile, where=~greater, facecolor='red', alpha=0.4)
skew.plot(p, tvals, "r")
skew.plot(p, tdvals, "g")
skew.plot_barbs(p, uvals, vvals)
# Plot a zero degree isotherm
l = skew.ax.axvline(0, color='c', linestyle='--', linewidth=2)
# Add the relevant special lines
skew.plot_dry_adiabats()
skew.plot_moist_adiabats()
skew.plot_mixing_lines()
plt.title("{} (dT={})".format(the_date, temp_perturbation_degc))
img_path = "{}_dT={}.png".format(the_date.strftime("%Y%m%d_%H%M%S"), temp_perturbation_degc)
img_path = img_dir.joinpath(img_path)
fig.savefig(str(img_path), bbox_inches="tight")
plt.close(fig)
def plot_from_u_and_v(
self,
u_field,
v_field,
p_field,
t_field,
td_field,
dsname=None,
subplot_index=(0, ),
p_levels_to_plot=None,
show_parcel=True,
shade_cape=True,
shade_cin=True,
set_title=None,
plot_barbs_kwargs=dict(),
plot_kwargs=dict(),
):
"""
This function will plot a Skew-T from a sounding dataset. The wind
data must be given in u and v.
Parameters
----------
u_field: str
The name of the field containing the u component of the wind.
v_field: str
The name of the field containing the v component of the wind.
p_field: str
The name of the field containing the pressure.
t_field: str
The name of the field containing the temperature.
td_field: str
The name of the field containing the dewpoint temperature.
dsname: str or None
The name of the datastream to plot. Set to None to make ACT
attempt to automatically determine this.
subplot_index: tuple
The index of the subplot to make the plot on.
p_levels_to_plot: 1D array
The pressure levels to plot the wind barbs on. Set to None
to have ACT to use neatly spaced defaults of
50, 100, 200, 300, 400, 500, 600, 700, 750, 800,
850, 900, 950, and 1000 hPa.
show_parcel: bool
Set to True to show the temperature of a parcel lifted
from the surface.
shade_cape: bool
Set to True to shade the CAPE red.
shade_cin: bool
Set to True to shade the CIN blue.
set_title: None or str
The title of the plot is set to this. Set to None to use
a default title.
plot_barbs_kwargs: dict
Additional keyword arguments to pass into MetPy's
SkewT.plot_barbs.
plot_kwargs: dict
Additional keyword arguments to pass into MetPy's
SkewT.plot.
Returns
-------
ax: matplotlib axis handle
The axis handle to the plot.
"""
if dsname is None and len(self._arm.keys()) > 1:
raise ValueError(("You must choose a datastream when there are 2 "
"or more datasets in the TimeSeriesDisplay "
"object."))
elif dsname is None:
dsname = list(self._arm.keys())[0]
if p_levels_to_plot is None:
p_levels_to_plot = np.array([
50., 100., 200., 300., 400., 500., 600., 700., 750., 800.,
850., 900., 950., 1000.
])
T = self._arm[dsname][t_field]
T_units = self._arm[dsname][t_field].attrs["units"]
if T_units == "C":
T_units = "degC"
T = T.values * getattr(units, T_units)
Td = self._arm[dsname][td_field]
Td_units = self._arm[dsname][td_field].attrs["units"]
if Td_units == "C":
Td_units = "degC"
Td = Td.values * getattr(units, Td_units)
u = self._arm[dsname][u_field]
u_units = self._arm[dsname][u_field].attrs["units"]
u = u.values * getattr(units, u_units)
v = self._arm[dsname][v_field]
v_units = self._arm[dsname][v_field].attrs["units"]
v = v.values * getattr(units, v_units)
p = self._arm[dsname][p_field]
p_units = self._arm[dsname][p_field].attrs["units"]
p = p.values * getattr(units, p_units)
u_red = np.zeros_like(p_levels_to_plot) * getattr(units, u_units)
v_red = np.zeros_like(p_levels_to_plot) * getattr(units, v_units)
p_levels_to_plot = p_levels_to_plot * getattr(units, p_units)
for i in range(len(p_levels_to_plot)):
index = np.argmin(np.abs(p_levels_to_plot[i] - p))
u_red[i] = u[index].magnitude * getattr(units, u_units)
v_red[i] = v[index].magnitude * getattr(units, v_units)
self.SkewT[subplot_index].plot(p, T, 'r', **plot_kwargs)
self.SkewT[subplot_index].plot(p, Td, 'g', **plot_kwargs)
self.SkewT[subplot_index].plot_barbs(p_levels_to_plot, u_red, v_red,
**plot_barbs_kwargs)
prof = mpcalc.parcel_profile(p, T[0], Td[0]).to('degC')
if show_parcel:
# Only plot where prof > T
lcl_pressure, lcl_temperature = mpcalc.lcl(p[0], T[0], Td[0])
self.SkewT[subplot_index].plot(lcl_pressure,
lcl_temperature,
'ko',
markerfacecolor='black',
**plot_kwargs)
self.SkewT[subplot_index].plot(p,
prof,
'k',
linewidth=2,
**plot_kwargs)
if shade_cape:
self.SkewT[subplot_index].shade_cape(p, T, prof, linewidth=2)
if shade_cin:
self.SkewT[subplot_index].shade_cin(p, T, prof, linewidth=2)
# Set Title
if set_title is None:
set_title = ' '.join([
dsname, 'on',
dt_utils.numpy_to_arm_date(self._arm[dsname].time.values[0])
])
self.axes[subplot_index].set_title(set_title)
# Set Y Limit
if hasattr(self, 'yrng'):
# Make sure that the yrng is not just the default
if not np.all(self.yrng[subplot_index] == 0):
self.set_yrng(self.yrng[subplot_index], subplot_index)
else:
our_data = p.magnitude
if np.isfinite(our_data).any():
yrng = [np.nanmax(our_data), np.nanmin(our_data)]
else:
yrng = [1000., 100.]
self.set_yrng(yrng, subplot_index)
# Set X Limit
xrng = [T.magnitude.min() - 10., T.magnitude.max() + 10.]
self.set_xrng(xrng, subplot_index)
return self.axes[subplot_index]
def msed_plots(pressure,
temperature,
mixing_ratio,
h0_std=2000,
ensemble_size=20,
ent_rate=np.arange(0, 2, 0.05),
entrain=False):
"""
plotting the summarized static energy diagram with annotations and thermodynamic parameters
"""
p = pressure * units('mbar')
T = temperature * units('degC')
q = mixing_ratio * units('kilogram/kilogram')
qs = mpcalc.mixing_ratio(mpcalc.saturation_vapor_pressure(T), p)
Td = mpcalc.dewpoint(mpcalc.vapor_pressure(p, q)) # dewpoint
Tp = mpcalc.parcel_profile(p, T[0], Td[0]).to('degC') # parcel profile
# Altitude based on the hydrostatic eq.
altitude = np.zeros((np.size(T))) * units('meter') # surface is 0 meter
for i in range(np.size(T)):
altitude[i] = mpcalc.thickness_hydrostatic(
p[:i + 1], T[:i + 1]) # Hypsometric Eq. for height
# Static energy calculations
mse = mpcalc.moist_static_energy(altitude, T, q)
mse_s = mpcalc.moist_static_energy(altitude, T, qs)
dse = mpcalc.dry_static_energy(altitude, T)
# Water vapor calculations
p_PWtop = max(200 * units.mbar,
min(p) + 1 * units.mbar) # integrating until 200mb
cwv = mpcalc.precipitable_water(Td, p,
top=p_PWtop) # column water vapor [mm]
cwvs = mpcalc.precipitable_water(
T, p, top=p_PWtop) # saturated column water vapor [mm]
crh = (cwv / cwvs) * 100. # column relative humidity [%]
#================================================
# plotting MSE vertical profiles
fig = plt.figure(figsize=[12, 8])
ax = fig.add_axes([0.1, 0.1, 0.6, 0.8])
ax.plot(dse, p, '-k', linewidth=2)
ax.plot(mse, p, '-b', linewidth=2)
ax.plot(mse_s, p, '-r', linewidth=2)
# mse based on different percentages of relative humidity
qr = np.zeros((9, np.size(qs))) * units('kilogram/kilogram')
mse_r = qr * units('joule/kilogram') # container
for i in range(9):
qr[i, :] = qs * 0.1 * (i + 1)
mse_r[i, :] = mpcalc.moist_static_energy(altitude, T, qr[i, :])
for i in range(9):
ax.plot(mse_r[i, :], p[:], '-', color='grey', linewidth=0.7)
ax.text(mse_r[i, 3].magnitude / 1000 - 1, p[3].magnitude,
str((i + 1) * 10))
# drawing LCL and LFC levels
[lcl_pressure, lcl_temperature] = mpcalc.lcl(p[0], T[0], Td[0])
lcl_idx = np.argmin(np.abs(p.magnitude - lcl_pressure.magnitude))
[lfc_pressure, lfc_temperature] = mpcalc.lfc(p, T, Td)
lfc_idx = np.argmin(np.abs(p.magnitude - lfc_pressure.magnitude))
# conserved mse of air parcel arising from 1000 hpa
mse_p = np.squeeze(np.ones((1, np.size(T))) * mse[0].magnitude)
# illustration of CAPE
el_pressure, el_temperature = mpcalc.el(p, T, Td) # equilibrium level
el_idx = np.argmin(np.abs(p.magnitude - el_pressure.magnitude))
ELps = [el_pressure.magnitude
] # Initialize an array of EL pressures for detrainment profile
[CAPE, CIN] = mpcalc.cape_cin(p[:el_idx], T[:el_idx], Td[:el_idx],
Tp[:el_idx])
plt.plot(mse_p, p, color='green', linewidth=2)
ax.fill_betweenx(p[lcl_idx:el_idx + 1],
mse_p[lcl_idx:el_idx + 1],
mse_s[lcl_idx:el_idx + 1],
interpolate=True,
color='green',
alpha='0.3')
ax.fill_betweenx(p, dse, mse, color='deepskyblue', alpha='0.5')
ax.set_xlabel('Specific static energies: s, h, hs [kJ kg$^{-1}$]',
fontsize=14)
ax.set_ylabel('Pressure [hpa]', fontsize=14)
ax.set_xticks([280, 300, 320, 340, 360, 380])
ax.set_xlim([280, 390])
ax.set_ylim(1030, 120)
if entrain is True:
# Depict Entraining parcels
# Parcel mass solves dM/dz = eps*M, solution is M = exp(eps*Z)
# M=1 at ground without loss of generality
# Distribution of surface parcel h offsets
H0STDEV = h0_std # J/kg
h0offsets = np.sort(np.random.normal(
0, H0STDEV, ensemble_size)) * units('joule/kilogram')
# Distribution of entrainment rates
entrainment_rates = ent_rate / (units('km'))
for h0offset in h0offsets:
h4ent = mse.copy()
h4ent[0] += h0offset
for eps in entrainment_rates:
M = np.exp(eps * (altitude - altitude[0])).to('dimensionless')
# dM is the mass contribution at each level, with 1 at the origin level.
M[0] = 0
dM = np.gradient(M)
# parcel mass is a sum of all the dM's at each level
# conserved linearly-mixed variables like h are weighted averages
hent = np.cumsum(dM * h4ent) / np.cumsum(dM)
# Boolean for positive buoyancy, and its topmost altitude (index) where curve is clippes
posboy = (hent > mse_s)
posboy[0] = True # so there is always a detrainment level
ELindex_ent = np.max(np.where(posboy))
# Plot the curve
plt.plot(hent[0:ELindex_ent + 2],
p[0:ELindex_ent + 2],
linewidth=0.25,
color='g')
# Keep a list for a histogram plot (detrainment profile)
if p[ELindex_ent].magnitude < lfc_pressure.magnitude: # buoyant parcels only
ELps.append(p[ELindex_ent].magnitude)
# Plot a crude histogram of parcel detrainment levels
NBINS = 20
pbins = np.linspace(1000, 150,
num=NBINS) # pbins for detrainment levels
hist = np.zeros((len(pbins) - 1))
for x in ELps:
for i in range(len(pbins) - 1):
if (x < pbins[i]) & (x >= pbins[i + 1]):
hist[i] += 1
break
det_per = hist / sum(hist) * 100
# percentages of detrainment ensumbles at levels
ax2 = fig.add_axes([0.705, 0.1, 0.1, 0.8], facecolor=None)
ax2.barh(pbins[1:],
det_per,
color='lightgrey',
edgecolor='k',
height=15 * (20 / NBINS))
ax2.set_xlim([0, max(det_per)])
ax2.set_ylim([1030, 120])
ax2.set_xlabel('Detrainment [%]')
ax2.grid()
ax2.set_zorder(2)
ax.plot([400, 400], [1100, 0])
ax.annotate('Detrainment', xy=(362, 320), color='dimgrey')
ax.annotate('ensemble: ' + str(ensemble_size * len(entrainment_rates)),
xy=(364, 340),
color='dimgrey')
ax.annotate('Detrainment', xy=(362, 380), color='dimgrey')
ax.annotate(' scale: 0 - 2 km', xy=(365, 400), color='dimgrey')
# Overplots on the mess: undilute parcel and CAPE, etc.
ax.plot((1, 1) * mse[0], (1, 0) * (p[0]), color='g', linewidth=2)
# Replot the sounding on top of all that mess
ax.plot(mse_s, p, color='r', linewidth=1.5)
ax.plot(mse, p, color='b', linewidth=1.5)
# label LCL and LCF
ax.plot((mse_s[lcl_idx] + (-2000, 2000) * units('joule/kilogram')),
lcl_pressure + (0, 0) * units('mbar'),
color='orange',
linewidth=3)
ax.plot((mse_s[lfc_idx] + (-2000, 2000) * units('joule/kilogram')),
lfc_pressure + (0, 0) * units('mbar'),
color='magenta',
linewidth=3)
### Internal waves (100m adiabatic displacements, assumed adiabatic: conserves s, sv, h).
#dZ = 100 *mpunits.units.meter
dp = 1000 * units.pascal
# depict displacements at sounding levels nearest these target levels
targetlevels = [900, 800, 700, 600, 500, 400, 300, 200] * units.hPa
for ilev in targetlevels:
idx = np.argmin(np.abs(p - ilev))
# dp: hydrostatic
rho = (p[idx]) / Rd / (T[idx])
dZ = -dp / rho / g
# dT: Dry lapse rate dT/dz_dry is -g/Cp
dT = (-g / Cp_d * dZ).to('kelvin')
Tdisp = T[idx].to('kelvin') + dT
# dhsat
dqs = mpcalc.mixing_ratio(mpcalc.saturation_vapor_pressure(Tdisp),
p[idx] + dp) - qs[idx]
dhs = g * dZ + Cp_d * dT + Lv * dqs
# Whiskers on the data plots
ax.plot((mse_s[idx] + dhs * (-1, 1)),
p[idx] + dp * (-1, 1),
linewidth=3,
color='r')
ax.plot((dse[idx] * (1, 1)),
p[idx] + dp * (-1, 1),
linewidth=3,
color='k')
ax.plot((mse[idx] * (1, 1)),
p[idx] + dp * (-1, 1),
linewidth=3,
color='b')
# annotation to explain it
if ilev == 400 * ilev.units:
ax.plot(360 * mse_s.units + dhs * (-1, 1) / 1000,
440 * units('mbar') + dp * (-1, 1),
linewidth=3,
color='r')
ax.annotate('+/- 10mb', xy=(362, 440), fontsize=8)
ax.annotate(' adiabatic displacement', xy=(362, 460), fontsize=8)
# Plot a crude histogram of parcel detrainment levels
# Text parts
ax.text(290, pressure[3], 'RH (%)', fontsize=11, color='k')
ax.text(285,
200,
'CAPE = ' + str(np.around(CAPE.magnitude, decimals=2)) + ' [J/kg]',
fontsize=12,
color='green')
ax.text(285,
250,
'CIN = ' + str(np.around(CIN.magnitude, decimals=2)) + ' [J/kg]',
fontsize=12,
color='green')
ax.text(285,
300,
'LCL = ' + str(np.around(lcl_pressure.magnitude, decimals=2)) +
' [hpa]',
fontsize=12,
color='darkorange')
ax.text(285,
350,
'LFC = ' + str(np.around(lfc_pressure.magnitude, decimals=2)) +
' [hpa]',
fontsize=12,
color='magenta')
ax.text(285,
400,
'CWV = ' + str(np.around(cwv.magnitude, decimals=2)) + ' [mm]',
fontsize=12,
color='deepskyblue')
ax.text(285,
450,
'CRH = ' + str(np.around(crh.magnitude, decimals=2)) + ' [%]',
fontsize=12,
color='blue')
ax.legend(['DSE', 'MSE', 'SMSE'], fontsize=12, loc=1)
ax.set_zorder(3)
return (ax)
# Often times we will want to calculate some thermodynamic parameters of a
# sounding. The MetPy calc module has many such calculations already implemented!
#
# * **Lifting Condensation Level (LCL)** - The level at which an air parcel's
# relative humidity becomes 100% when lifted along a dry adiabatic path.
# * **Parcel Path** - Path followed by a hypothetical parcel of air, beginning
# at the surface temperature/pressure and rising dry adiabatically until
# reaching the LCL, then rising moist adiabatially.
# Calculate the LCL
lcl_pressure, lcl_temperature = mpcalc.lcl(p[0], T[0], Td[0])
print(lcl_pressure, lcl_temperature)
# Calculate the parcel profile.
parcel_prof = mpcalc.parcel_profile(p, T[0], Td[0]).to('degC')
##########################################################################
# Basic Skew-T Plotting
# ---------------------
#
# The Skew-T (log-P) diagram is the standard way to view rawinsonde data. The
# y-axis is height in pressure coordinates and the x-axis is temperature. The
# y coordinates are plotted on a logarithmic scale and the x coordinate system
# is skewed. An explanation of skew-T interpretation is beyond the scope of this
# tutorial, but here we will plot one that can be used for analysis or
# publication.
#
# The most basic skew-T can be plotted with only five lines of Python.
# These lines perform the following tasks:
#