spei.rai module

spei.rai.mrai(series: Series, sf: float = 1.7) → Series

Calculate the Modified Rainfall Anomaly Index (MRAI) for a given time series of precipitation data.

Parameters:

• series (pd.Series) – A pandas Series containing precipitation data.

• sf (float) – Scaling factor for the MRAI calculation. Default is 1.7.

Returns:

A pandas Series containing the MRAI values.

Return type:

pd.Series

References

Hänsel, S., Schucknecht, A. and Matschullat J. The Modified Rainfall Anomaly Index (mRAI) — is this an alternative to the Standardised Precipitation Index (SPI) in evaluating future extreme precipitation characteristics? Theoretical and Applied Climatology. 2015.

spei.rai.rai(series: Series) → Series

Calculate the Rainfall Anomaly Index (RAI) for a given time series of precipitation data.

Parameters:

series (pd.Series) – A pandas Series containing precipitation data.

Returns:

A pandas Series containing the RAI values.

Return type:

pd.Series

References

van Rooy, M.P. A Rainfall Anomaly Index Independent of Time and Space. Notos. 1965.