pywasp.lincom.get_return_wind#

pywasp.lincom.get_return_wind(pewc, return_period=50, pewc_max_interval=None)[source]#

Use the Gumbel distribution to find the return wind and uncertainty

Warning

This function is experimental and its signature may change.

Parameters:

pewc (xarray.Dataset) – PyWAsP PEWC dataset with max_wspd variable, and only year and geospatial dimensions
return_period (float, optional) – Return period in years to calculate the max wind speed and uncertainty By default 50 (years)
pewc_max_interval (float, optional) – Maximum interval in years, by default None

Returns:

out_ds (Dataset) – PyWAsP Dataset of the same spatial structure as pewc, containing the Gumbel distributions Alpha and Beta parameters, the extreme wind speed, and the uncertainty of the extreme wind speed.

Raises:

CoreError – If the Gumbel fit fails: pewc has fewer than two years, return_period is below one year, or pewc_max_interval is zero or negative.

Notes

pewc_max_interval is likely 1, the period of each year

Every condition that makes the fit fail applies to all points alike, so a failure raises instead of being reported per point. A point whose maxima contain NaN gets NaN results.