6-Month Standardized Precipitation Index from IRI Analyses SPI: Standardized Precipitation Index analyses of multiple global precipitation datasets.
Independent Variables (Grids)
- Time
- grid: /T (months since 1960-01-01) ordered (Jan 1979) to (Jan 2025) by 1.0 N= 553 pts :grid
- Longitude
- grid: /X (degree_east) periodic (0) to (1W) by 1.0 N= 360 pts :grid
- Latitude
- grid: /Y (degree_north) ordered (89S) to (89N) by 1.0 N= 179 pts :grid
Other Info
- bufferwordsize
- 8
- CE
- 3.5
- colorscalename
- drought_monitor_colors1
- CS
- -3.5
- datatype
- doublearraytype
- file_missing_value
- -9.9899998
- maxncolor
- 254
- missing_value
- NaN
- pointwidth
- 1.0
- scale_max
- 3.5
- scale_min
- -3.5
- units
- unitless
- history
- NOAA NCEP CPC GOB V0px daily RETRO prcp
- Boxes with less than 0.0% dropped
T: Nov 2014 to Jan 2025 appended from NOAA NCEP CPC GOB V0px daily REALTIME prcp
IRI Analyses SPI SPI-GOBv0px1deg_6-Month- Boxes with less than 25.0% dropped
Boxes with less than 25.0% dropped
- colorscale
References
Guttman, N. B., 1999: Accepting the Standandardized Precipitation Index: a calculation algorithm. J. Amer. Water Resour. Assoc., 35(2), 311-322
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. 179-184.
McKee, T.B., N.J. Doesken, and J. Kliest, 1995: Drought monitoring with multiple time scales. In Proceedings of the 9th Conference of Applied Climatology, 15-20 January, Dallas TX. American Meteorological Society, Boston, MA. 233-236
Last updated: Tue, 04 Feb 2025 19:28:51 GMT