PSM.pdsi

Implements an estimator of Palmer Drought-Severity Index

Description

The pdsi forward model uses monthly temperature and monthly precipitation to estimate the Palmer Drought-Severity Index. This model uses the Thornthwaite estimation to calculate potential evapotranspiration. Includes options to return raw PDSI or modified PDSI. In either case, the model maintains significant memory of previous time steps.

The Pdsi Calculation Is Described In

Palmer, W.C. (1965) Meteorological drought, Vol. 30 (US Department of Commerce, Weather Bureau).

The Thornthwaite Estimation Is Described In

Thornthwaite, C.W. (1948) An Approach toward a rational classification of climate. Geographical Review 38(1), 55-94.

Github Repository: https://github.com/JonKing93/pdsi

User Methods

Create

pdsi - Creates a new pdsi PSM object

label - Apply a label to a pdsi object

Estimate

rows - Indicate the state vector rows that hold the monthly temperature and precipitation inputs

Utility Methods

Utility methods that help the class run. These are not intended for users, and do not implement error checking on their inputs.

Estimate

estimate - Estimates pdsi using monthly temperature and precipitation

Inherited

name - Returns an identifying name for use in error messages
parseRows - Error checks and parses state vector rows
disp - Display the PSM in the console