Theoretical Climate and Paleoclimate Dynamics
We address mathematical and statistical aspects of climate and palaeoclimate dynamics. We use dynamical system theory, experiments with general circulation models, methods of inference (emulation, dynamical system calibration) and time-series analysis methods to characterise the dynamics of the climate system, estimate its predictability and identify physical mechanisms of variability.
It has been previously suggested that climate fluctuations are scale invariant over a wide range of time scales. We have shown that all the analyses that have yielded this suggestion are compatible with the simpler interpretation that the glacial climate oscillated between two different regimes. [link]
Takahito Mitsui and Michel Crucifix contributed to an article published in the scientific journal « Nature », which provides a set of rules that predict when, during the last 2.6 million years, Earth’s climate warmed out of ice ages. They showed that the sequence of interglacials that has occurred is one of a small set of possibilities. The study was lead by Chronis Tzedakis was also a collaboration with Eric Wolff. [link]
David Devleeschouwer at al. delivered δ18O benthic record compiled from different high-resolution benthic isotope records spliced together. This is a mega slpice, covering 35 million years of Earth history, suitable to analyse Earth's response to astronomical forcing. Published in Geology. [link]
WAVEPAL is a package, written in python 2.X, that performs frequency and time-frequency analyses of irregularly sampled time series with a polynomial trend, without interpolating the data. [link]
We have shown the dependence of the frequency of Dansgaard-Oeshger events on the astronomical forcing, and provide a prediction of DO events over Marine Isotopic Stages 8 and 10. [link]