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Drought

dim_acumrun_n Calculates individual accumulated sums of sequences ('runs') of a specified length.
dim_cumsum_n Calculates the cumulative sum along the given dimension(s).
dim_cumsum_n_Wrap Calculates the cumulative sum along the given dimension(s) and retains metadata.
dim_gamfit_n Fit data to the two parameter gamma distribution.
dim_numrun_n Counts the number of "runs" (sequences) within a series containing zeros and ones.
dim_spi_n Calculates the standardized precipitation index (SPI) by fitting a gamma or a Pearson Type III distribution to monthly precipitation values.