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14 papers · 1 filter
Reduced-Order Models for Coupled Dynamical Systems: Data-driven Methods and the Koopman Operator
Manuel Santos Gutiérrez, Valerio Lucarini, Mickaël D. Chekroun +1
Providing efficient and accurate parametrizations for model reduction is a key goal in many areas of science and technology. Here we present a strong link between data-driven and t…
Smoke-charged vortices in the stratosphere generated by wildfires and their behaviour in both hemispheres : comparing Australia 2020 to Canada 2017
Hugo Lestrelin, Bernard Legras, Aurélien Podglajen +1
The two most intense wildfires of the last decade that took place in Canada in 2017 and Australia in 2019-2020 were followed by large injections of smoke in the stratosphere due to…
Noise-driven Topological Changes in Chaotic Dynamics
Gisela D. Charó, Mickaël D. Chekroun, Denisse Sciamarella +1
Noise modifies the behavior of chaotic systems in both quantitative and qualitative ways. To study these modifications, the present work compares the topological structure of the d…
Is the faint young Sun problem for Earth solved?
Benjamin Charnay, Eric T. Wolf, Bernard Marty +1
Stellar evolution models predict that the solar luminosity was lower in the past, typically 20-25 % lower during the Archean (3.8-2.5 Ga). Despite the fainter Sun, there is strong…
Ranking IPCC Models Using the Wasserstein Distance
Gabriele Vissio, Valerio Lembo, Valerio Lucarini +1
We propose a methodology for intercomparing climate models and evaluating their performance against benchmarks based on the use of the Wasserstein distance (WD). This distance prov…
The 2019/20 Australian wildfires generated a persistent smoke-charged vortex rising up to 35 km altitude
Sergey Khaykin, Bernard Legras, Silvia Bucci +9
The Australian bushfires around the turn of the year 2020 generated an unprecedented perturbation of stratospheric composition, dynamical circulation and radiative balance. Here we…