IRI Analyses SPI SPI-GOBv0px1deg_9-Month: 9-Month Standardized Precipitation Index data

9-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 (Apr 2024) by 1.0 N= 544 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 Apr 2024 appended from NOAA NCEP CPC GOB V0px daily REALTIME prcp

IRI Analyses SPI SPI-GOBv0px1deg_9-Month
Boxes with less than 25.0% dropped
Boxes with less than 25.0% dropped
colorscale

References

Guttman1999

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: Wed, 15 May 2024 11:45:23 GMT

Data Views

TXY
[ T | X Y]MMM


Filters

Here are some filters that are useful for manipulating data. There are actually many more available, but they have to be entered manually. See Ingrid Function Documentation for more information. Average over T X Y | T X T Y X Y | T X Y |
RMS (root mean square with mean *not* removed) over T X Y | T X T Y X Y | T X Y |
RMSA (root mean square with mean removed) over T X Y | T X T Y X Y | T X Y |
Maximum over T X Y | T X T Y X Y | T X Y |
Minimum over T X Y | T X T Y X Y | T X Y |
Detrend (best-fit-line) over T X Y | T X T Y X Y | T X Y |
Convert units from unitless to

Note on units