astsa (version 2.4)

ENSO: El Nino - Southern Oscillation Index

Description

Southern Oscillation Index (SOI), 1/1951 to 10/2022; anomalies are departures from the 1981-2010 base period.

Format

The format is: Time-Series [1:862] from 1951 to 2022: 2.0 1.1 -0.3 -0.8 -1.1 -0.7 -1.5 -0.3 -0.7 -0.7 ...

Details

The \(\textrm{El Ni\~no - Southern Oscillation (ENSO)}\) is a recurring climate pattern involving changes in the temperature of waters in the central and eastern tropical Pacific Ocean. This data set is an update to soi.

References

You can find demonstrations of astsa capabilities at FUN WITH ASTSA.

The most recent version of the package can be found at https://github.com/nickpoison/astsa/.

In addition, the News and ChangeLog files are at https://github.com/nickpoison/astsa/blob/master/NEWS.md.

The webpages for the texts and some help on using R for time series analysis can be found at https://nickpoison.github.io/.

See Also

soi, ENSO, MEI, MEI2

Examples

# ENSO is a standardized index based on the sea level pressure differences between 
# Tahiti and Darwin, Australia.  MEI is a similar index based on multiple factors.
# As opposed to ENSO (and SOI), positive values of MEI correspond to warmer temperatures.

tsplot(cbind(-ENSO, MEI), col=astsa.col(2*2:1, .6), addLegend=TRUE, spag=TRUE, lwd=1:2)

tspairs(ts.intersect(-ENSO, MEI), location='top')