References

Journal

• Guttman, N. B., 1999: Accepting the Standardized Precipitation Index: A calculation algorithm. J. Amer. Water Resour. Assoc., 35(2), 311-322. Link
• Lloyd Hughes, B., and M. A. Saunders, 2002: A drought climatology for Europe. Int. J. Climatol., DOI:10.1002/joc.846 Link
• McKee, T.B., N. J. Doesken, and J. Kliest, 1993: The relationship of drought frequency and duration to time scales. In Proceedings of the 8th Conference of Applied Climatology, 17 22 January, Anaheim, CA. American Meterological Society, Boston, MA. 179-18. Link
• Guttman, N. B., 1998: Comparing the Palmer Drought Index and the Standardized Precipitation Index. J. Amer. Water Resources Assoc., 34(1), 113-121.
• Edwards, D. C., and T. B. McKee, 1997: Characteristics of 20th century drought in the United States at multiple time scales. Climatology Report No. 97-2, Colorado State Univ., Ft. Collins, CO.
• McKee, T. B., N. J. Doesken, and J. Kleist, 1995: Drought monitoring with multiple time scales. Ninth Conference on Applied Climatology, American Meteorological Society, Jan15-20, 1995, Dallas TX, pp.233-236.

Website

• Keyantash, John & National Center for Atmospheric Research Staff (Eds). "The Climate Data Guide: Standardized Precipitation Index (SPI)." Retrieved from https://climatedataguide.ucar.edu/climate-data/standardized-precipitation-index-spi
• National Drought Mitigation Center (NDMC) at the University of Nebraska Lincoln. Link
• World Meteorological Organization (WMO), 2012: Standardized Precipitation Index User Guide. Link
• Climate Indices in Python https://climate-indices.readthedocs.io/en/latest/
• Climate Engine - https://app.climateengine.org/climateEngine
• BMKG - https://www.bmkg.go.id/iklim/indeks-presipitasi-terstandarisasi.bmkg
• NASA ARSET on Application of GPM IMERG Reanalysis for Assessing Extreme Dry and Wet Periods. Link
• Climate Data Operator - https://code.mpimet.mpg.de/projects/cdo
• netCDF Operator - http://nco.sourceforge.net
• CHIRPS, Climate Hazard Centre UCSB - https://chc.ucsb.edu/data/chirps
• IMERG, Integrated Multi-satellitE Retrievals for GPM - https://gpm.nasa.gov/data/imerg
• https://benny.istan.to/blog/20200706-calculate-spi-using-imerg-data
• https://benny.istan.to/blog/20200710-calculate-spi-using-chirps-data
• https://benny.istan.to/blog/20201210-geotiff-to-netcdf-file-with-time-dimension-enabled-and-cf-compliant
• https://benny.istan.to/blog/20210125-calculate-spi-using-monthly-rainfall-data-in-geotiff-format