area_weighted_mean

typhon.geographical.area_weighted_mean(lon, lat, data)

Calculate the mean of gridded data on a sphere.

Data points on the Earth’s surface are often represented as a grid. As the grid cells do not have a constant area they have to be weighted when calculating statistical properties (e.g. mean).

This function returns the weighted mean assuming a perfectly spherical globe.

Parameters

• lon (ndarray) – Longitude (M) angles [degree].

• lat (ndarray) – Latitude (N) angles [degree].

• data ()ndarray) – Data array (N x M).

Returns

Area weighted mean.

Return type

float