Datasets: Data sets for illustrating the functions in the SPEI package.

Description

Data used in the examples of the SPEI package: wichita dataset: monthly climate in Wichita (Kansas, lat=37.6475, elevation=402.6 m. a.s.l.) since January 1980; balance dataset: monthly climatic water balance (precipitation minus potential evapotranspiration) at eleven locations around the World, since January 1900; cabinda: one year of data for computing Penman-Monteith ET0 from Allen et al. (1998); cruts4: 120 years of monthly climatic water balance (precipitation minus reference evapotranspiration) data at six grid points from CRU TS 4.05.

Arguments

Format

wichita dataset: a data frame with:

YEAR: monthly precipitation totals, in mm.
MONTH: monthly precipitation totals, in mm.
PRCP: monthly precipitation totals, in mm.
TMAX: monthly mean daily maximum temperature, in ºC.
TMIN: monthly mean daily minimum temperature, in ºC.
TMED: monthly mean temperature, in ºC.
AWND: monthly mean wind speed, in km h-1
ACSH: monthly mean sun hours, in h.
ACSH: monthly mean cloud cover, in %.

balance dataset: a data frame with monthly climatic water balance (precipitation minus potential evapotranspiration) at Indore (India), Kimberley (South Africa), Albuquerque (US), Valencia (Spain), Wien (Austria), Abashiri (Japan), Tampa (US), Sao Paulo (Brazil), Lahore (India), Punta Arenas (Chile) and Helsinki (Finland), in mm. cabinda dataset: a data frame with one year of monthly climatic data at Cabinda (Angola, -5.33S 12.11E 20 m), with:

mon: month of the year
Tmin: monthly mean daily minimum temperature, in ºC.
Tmax: monthly mean daily maximum temperature, in ºC.
RH: monthly mean relative humidity, in %.
U2: monthly mean wind speed, in km h-1
tsun: monthly mean sunshine hours, in h.
Rs: monthly mean daily incoming solar radiation, MJ m-2 d-1.
ET0: monthly ET0 from the original publication, in mm.

cruts4 dataset: an array with 120 years of monthly climatic water balance (precipitation minus reference evapotranspiration) data at six grid points from CRU TS 4.05 data set. The array has dimensions [time=1440, longitude=2, latitude=3], with time starting in January 1900. Longitudes are (0.25, 0.75), and latitudes (42.25, 42.75, 43.25), corresponding to the Central Pyrenees between Spain and France.

Author

Data ported to R by S. Beguería.

Details

See description.

References

S.M. Vicente-Serrano, S. Beguería, J.I. López-Moreno. 2010. A Multi-scalar drought index sensitive to global warming: The Standardized Precipitation Evapotranspiration Index – SPEI. Journal of Climate 23: 1696, DOI: 10.1175/2009JCLI2909.1.

R.G. Allen, L.S. Pereira, D. Raes, M. Smith. 1998. JCrop evapotranspiration - Guidelines for computing crop water requirements - FAO Irrigation and drainage paper 56. FAO, Rome. ISBN 92-5-104219-5.

Examples

Run this code

data(wichita)
names(wichita)
summary(wichita)
data(balance)
summary(balance)
data(cruts4)
summary(cruts4)

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