Articles | Volume 12, issue 1
https://doi.org/10.5194/cp-12-31-2016
https://doi.org/10.5194/cp-12-31-2016
Research article
 | 
15 Jan 2016
Research article |  | 15 Jan 2016

Inferring climate variability from nonlinear proxies: application to palaeo-ENSO studies

J. Emile-Geay and M. Tingley

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Short summary
Ignoring nonlinearity in palaeoclimate records (e.g. continental run-off proxies) runs the risk of severely overstating changes in climate variability. Even with the correct model and parameters, some information is irretrievably lost by such proxies. However, we find that a simple empirical transform can do much to improve the situation, and makes them amenable to classical analyses. Doing so on two palaeo-ENSO records markedly changes some of the quantitative inferences made from such records.