Calculations (rojak.turbulence.calculations)

Physical quantities and turbulence-relevant derived fields computed from meteorological data

This module provides standalone functions for computing quantities used to construct clear-air turbulence (CAT) diagnostics from raw meteorological fields (wind components, geopotential, temperature, pressure), such as deformation (shearing_deformation(), stretching_deformation(), total_deformation()), vorticity and potential vorticity (vertical_component_vorticity(), absolute_vorticity(), potential_vorticity()), wind-derived quantities (wind_speed(), wind_direction(), vertical_wind_shear()), and other atmospheric parameters (potential_temperature(), coriolis_parameter(), latitudinal_derivative()). Functions generally operate on xarray.DataArray inputs and are agnostic to whether the underlying data is a dask or numpy array.

Functions

absolute_vorticity(vorticity)	Vertical component of absolute vorticity
altitude_derivative_on_pressure_level(...[, ...])	Derivative w.r.t.
angles_gradient(array, target_axis[, ...])	Gradient of array of angles
coriolis_parameter(latitude)	Coriolis parameter
latitudinal_derivative(coriolis_param)	Latitudinal derivative or Rossby Parameter
magnitude_of_geospatial_gradient(array[, ...])	Magnitude of geospatial gradient
magnitude_of_vector(x_component, y_component)	Magnitude of vector
potential_temperature(temperature, pressure)	Potential temperature
potential_vorticity(vorticity, theta)	Ertel's potential vorticity
shearing_deformation(dv_dx, du_dy)	Shear deformation
stretching_deformation(du_dx, dv_dy)	Stretch deformation
total_deformation(du_dx, du_dy, dv_dx, ...)	Total deformation
vertical_component_vorticity(dvdx, dudy)	Vertical component of vorticity
vertical_wind_shear(u_wind, v_wind[, ...])	Vertical wind shear
wind_direction(u_wind, v_wind)	Wind direction
wind_speed(u_wind, v_wind[, is_abs, is_squared])	Wind speed