PAP

Luo_Suppe2026-08-15

gma.climet.index.PAP

[function] PAP(pre, axis = None, scale = 1, periodicity = 12):

Calculate fluctuation of precipitation to multi-year averages.

Parameters:

pre: array.

Precipitation (mm).

**Optional:

axis = int. Default None.

Calculation axis. If not set (None), multidimensional data will be expanded to 1 dimension for calculation.

scale = int. Default 1.

Time scale. For example: 1, 3 or others.

periodicity = int. Default 12.

Periodicity of data. For example: the monthly scale can have a period of 12.

*Note: scale||periodicity are based on calculated axis!.

Returns:

Type: array.

References:

https://image.data.cma.cn/staticDry/article/20170927151824947.pdf