209 citations · 1.1k across the 17 of their papers we have counts for
17 papers
Rare events algorithm study of extreme double jet summers and their connection to heatwaves over the Northern Hemisphere
Valeria Mascolo, Francesco Ragone, Nili Harnik +1
Several large scale circulation patterns have been identified in relation to extreme Northern Hemisphere summer heatwaves. Three main ones are a double jet over Eurasia, a positive…
Extremes of summer Arctic sea ice reduction investigated with a rare event algorithm
Jerome Sauer, Jonathan Demaeyer, Giuseppe Zappa +2
Various studies identified possible drivers of extremes of Arctic sea ice reduction, such as observed in the summers of 2007 and 2012, including preconditioning, local feedback mec…
Robust intra-model teleconnection patterns for extreme heatwaves
George Miloshevich, Philippine Rouby-Poizat, Francesco Ragone +1
We investigate the statistics and dynamics of extreme heat waves over different areas of Europe. We find heatwaves over France and Scandinavia to be associated with recurrent waven…
Applications of large deviation theory in geophysical fluid dynamics and climate science
Vera Melinda Galfi, Valerio Lucarini, Francesco Ragone +1
The climate system is a complex, chaotic system with many degrees of freedom and variability on a vast range of temporal and spatial scales. Attaining a deeper level of understandi…
Deep Learning-based Extreme Heatwave Forecast
Valérian Jacques-Dumas, Francesco Ragone, Pierre Borgnat +2
Because of the impact of extreme heat waves and heat domes on society and biodiversity, their study is a key challenge. We specifically study long-lasting extreme heat waves, which…
Rare event algorithm study of extreme warm summers and heat waves over Europe
Francesco Ragone, Freddy Bouchet
The analysis of extremes in climate models is hindered by the lack of statistics due to the computational costs required to run simulations long enough to sample rare events. We de…
Beyond Forcing Scenarios: Predicting Climate Change through Response Operators in a Coupled General Circulation Model
Valerio Lembo, Valerio Lucarini, Francesco Ragone
Global Climate Models are key tools for predicting the future response of the climate system to a variety of natural and anthropogenic forcings. Here we show how to use statistical…
Computation of extremes values of time averaged observables in climate models with large deviation techniques
Francesco Ragone, Freddy Bouchet
One of the goals of climate science is to characterize the statistics of extreme and potentially dangerous events in the present and future climate. Extreme events like heat waves,…
Computing return times or return periods with rare event algorithms
Thibault Lestang, Francesco Ragone, Charles-Edouard Bréhier +2
The average time between two occurrences of the same event, referred to as its return time (or return period), is a useful statistical concept for practical applications. For insta…
Computation of extreme heat waves in climate models using a large deviation algorithm
Francesco Ragone, Jeroen Wouters, Freddy Bouchet
Studying extreme events and how they evolve in a changing climate is one of the most important current scientific challenges. Starting from complex climate models, a key difficulty…
Predicting Climate Change using Response Theory: Global Averages and Spatial Patterns
Valerio Lucarini, Frank Lunkeit, Francesco Ragone
The provision of accurate methods for predicting the climate response to anthropogenic and natural forcings is a key contemporary scientific challenge. Using a simplified and effic…
A study of surface semi-geostrophic turbulence: freely decaying dynamics
Francesco Ragone, Gualtiero Badin
In this study we give a characterization of semi-geostrophic turbulence by performing freely decaying simulations for the case of constant uniform potential vorticity, a set of equ…
A new framework for climate sensitivity and prediction: a modelling perspective
Francesco Ragone, Valerio Lucarini, Frank Lunkeit
The sensitivity of climate models to increasing CO2 concentration and the climate response at decadal time scales are still major factors of uncertainty for the assessment of the l…
Mathematical and Physical Ideas for Climate Science
Valerio Lucarini, Richard Blender, Corentin Herbert +3
The climate is a forced and dissipative nonlinear system featuring non-trivial dynamics of a vast range of spatial and temporal scales. The understanding of the climate's structura…
Nonequilibrium thermodynamics of circulation regimes in optically-thin, dry atmospheres
Salvatore Pascale, Francesco Ragone, Valerio Lucarini +2
An extensive analysis of an optically-thin, dry atmosphere at different values of the thermal Rossby number Ro and of the Taylor number Ff is per- formed with a general circulation…
New Results on the Thermodynamical Properties of the Climate System
Valerio Lucarini, Klaus Fraedrich, Francesco Ragone
In this paper we exploit two equivalent formulations of the average rate of material entropy production in a planetary system to propose an approximate splitting between contributi…
Energetics of PCMDI/CMIP3 Climate Models: Energy Budget and Meridional Enthalpy Transport
Valerio Lucarini, Francesco Ragone
We analyze the PCMDI/CMIP3 simulations performed by climate models (CMs) using pre-industrial and SRESA1B scenarios. Relatively large biases are present for most CMs when global en…