stretching_deformation

metpy.calc.stretching_deformation(u, v, dx, dy)[source]

Calculate the stretching deformation of the horizontal wind.

Parameters:
  • u ((M, N) ndarray) – x component of the wind
  • v ((M, N) ndarray) – y component of the wind
  • dx (float or ndarray) – The grid spacing(s) in the x-direction. If an array, there should be one item less than the size of u along the applicable axis.
  • dy (float or ndarray) – The grid spacing(s) in the y-direction. If an array, there should be one item less than the size of u along the applicable axis.
  • dim_order (str or None, optional) – The ordering of dimensions in passed in arrays. Can be one of None, 'xy', or 'yx'. 'xy' indicates that the dimension corresponding to x is the leading dimension, followed by y. 'yx' indicates that x is the last dimension, preceded by y. None indicates that the default ordering should be assumed, which is ‘yx’. Can only be passed as a keyword argument, i.e. func(…, dim_order=’xy’).
Returns:

(M, N) ndarray – Stretching Deformation

See also

shearing_deformation(), total_deformation()

Notes

If inputs have more than two dimensions, they are assumed to have either leading dimensions of (x, y) or trailing dimensions of (y, x), depending on the value of dim_order.