Skew-T plot of a sounding#

This example shows how to make a Skew-T plot from a sounding and calculate stability indicies.

import xarray as xr
from arm_test_data import DATASETS
from matplotlib import pyplot as plt

import act

# Make sure attributes are retained
xr.set_options(keep_attrs=True)

# Read data
filename_sonde = DATASETS.fetch('sgpsondewnpnC1.b1.20190101.053200.cdf')
sonde_ds = act.io.arm.read_arm_netcdf(filename_sonde)

print(list(sonde_ds))
# Calculate stability indicies
sonde_ds = act.retrievals.calculate_stability_indicies(
    sonde_ds, temp_name='tdry', td_name='dp', p_name='pres'
)
print(sonde_ds['lifted_index'])

# Set up plot
skewt = act.plotting.SkewTDisplay(sonde_ds, figsize=(15, 10))

# Add data
skewt.plot_from_u_and_v('u_wind', 'v_wind', 'pres', 'tdry', 'dp')

plt.show()
# One could also add options like adiabats and mixing lines
skewt = act.plotting.SkewTDisplay(sonde_ds, figsize=(15, 10))
skewt.plot_from_u_and_v(
    'u_wind',
    'v_wind',
    'pres',
    'tdry',
    'dp',
    plot_dry_adiabats=True,
    plot_moist_adiabats=True,
    plot_mixing_lines=True,
)
plt.show()
sonde_ds.close()

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