Articles | Volume 8, issue 2
30 Sep 2022
 | 30 Sep 2022

Comparing climate time series – Part 4: Annual cycles

Timothy DelSole and Michael K. Tippett

Model code and software

tdelsole/Comparing-Annual-Cycles: ComparingCyclesv1.0 Timothy DelSole

Short summary
Most climate time series contain annual and diurnal cycles. However, an objective criterion for deciding whether two time series have statistically equivalent annual and diurnal cycles is lacking, particularly if the residual variability is serially correlated. Such a criterion would be helpful in deciding whether a new version of a climate model better simulates such cycles. This paper derives an objective rule for such decisions based on a rigorous statistical framework.