A5007580785- Climate variability and models
- Arctic and Antarctic ice dynamics
- Oceanographic and Atmospheric Processes
- Meteorological Phenomena and Simulations
- Atmospheric and Environmental Gas Dynamics
- Fluid Dynamics and Thin Films
- Geological Studies and Exploration
- Climate change and permafrost
- Coal Combustion and Slurry Processing
- Methane Hydrates and Related Phenomena
- Marine and coastal ecosystems
- Hydraulic and Pneumatic Systems
- Cryospheric studies and observations
- Fluid Dynamics and Heat Transfer
- Fluid Dynamics and Turbulent Flows
- Geology and Paleoclimatology Research
- Marine and fisheries research
- Petroleum Processing and Analysis
- Migration, Health and Trauma
- Cavitation Phenomena in Pumps
- nanoparticles nucleation surface interactions
- Advanced Power Generation Technologies
- Attention Deficit Hyperactivity Disorder
- Combustion and flame dynamics
- Marine and environmental studies
University of Lisbon
2022-2024
IMT Atlantique
2023-2024
Centre National de la Recherche Scientifique
2020-2024
Université de Bretagne Occidentale
2023-2024
Laboratoire des Sciences et Techniques de l’Information de la Communication et de la Connaissance
2023-2024
Instituto Dom Luiz
2022-2024
Institut Mines-Télécom
2023
Institut de Recherche pour le Développement
2020-2022
Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques
2020-2022
Sorbonne Université
2020-2022
Abstract. Correlation does not necessarily imply causation, and this is why causal methods have been developed to try disentangle true links from spurious relationships. In our study, we use two methods, namely, the Liang–Kleeman information flow (LKIF) Peter Clark momentary conditional independence (PCMCI) algorithm, apply them four different artificial models of increasing complexity one real-world case study based on climate indices in Atlantic Pacific regions. We show that both are...
Marine temperature extremes are anomalous ocean events, often persisting over several weeks or longer, with potential impacts on physical and ecological processes that encompass socio-economic implications. In recent years, a considerable effort has been directed at the development of metrics allowing an objective characterization both marine heatwaves (MHWs) cold spells (MCSs). However, majority these do not consider explicitly spatial extent events. Here, we rank evaluate relative...
Abstract The direct response of the cold-season atmospheric circulation to Arctic sea ice loss is estimated from observed concentration (SIC) and an reanalysis, assuming that long-term same as interannual pan-Arctic SIC fluctuations with identical spatial patterns. No large-scale relationship previous found in October November, but a negative North Atlantic Oscillation (NAO)/Arctic follows December March. signal field significant stratosphere December, troposphere tropopause thereafter....
Abstract. The latest Intergovernmental Panel on Climate Change (IPCC) report describes an increase in the number and intensity of marine heatwaves (MHWs) a decrease cold spells (MCSs) global ocean. However, these reported changes are not uniform regional to local basis, it remains unknown if coastal areas follow open-ocean trends. Surface ocean temperature measurements collected by satellites (from 1982–2022) 13 buoys 1990–2022) analyzed northeastern Atlantic three subregions: English...
Abstract. Understanding the evolution of Arctic sea-ice is crucial due to its climatic and socio-economic impacts. Usual descriptors (e.g., extent, age, ice-free duration) quantify changes but do not account for full seasonal cycle. Here, using satellite observations concentration over 1979–2023, we perform a k-means clustering cycle, initializing with equal quantile separation Mahalanobis distance. We identify four optimal cycle clusters: open-ocean (no ice year-round), permanent (full...
Understanding the evolution of Arctic sea-ice is crucial due to its socio-economic impacts. Usual descriptors (e.g., extent, age and ice-free duration) quantify changes but do not account for full seasonal cycle. Here, using satellite observations concentration (1979-2023), we perform a k-means clustering cycle, initializing with equal quantile separation Mahalanobis distance. We identify four optimal cycle clusters: ocean-only (no ice year-round), permanent (full coverage minimum 0.7...
Abstract. The modulation of the winter impacts Arctic sea-ice loss by Pacific Decadal Oscillation (PDO) is investigated in IPSL-CM6A-LR ocean–atmosphere general circulation model. Ensembles simulations are performed with constrained concentration following Polar Amplification Model Intercomparison Project (PAMIP) and initial conditions sampling warm cold phases PDO. Using a linear model, we estimate simulated impact loss, PDO their combined effects. On one hand, negative North Atlantic...
Abstract. The modulation of the winter impacts Arctic sea ice loss by Pacific Decadal Oscillation (PDO) is investigated in IPSL-CM6A-LR ocean-atmosphere general circulation model. Ensembles simulations are performed with constrained concentration corresponding to pre-industrial, present-day and future states, initial conditions sampling warm cold phases PDO. Using a linear model, we estimate simulated impact loss, PDO their combined effects. In response lower troposphere warms negative...
Abstract The impact of Arctic sea ice loss on the ocean and atmosphere is investigated focusing a gradual reduction by 20% annual mean, occurring within 30 years, starting from present-day conditions. Two ice-constraining methods are explored to melt in coupled climate model, while keeping conditions for external forcing. first method uses albedo, which modifies incoming surface shortwave radiation. second thermal conductivity, changes heat conduction flux inside ice. Reduced conductivity...
In the past 40 years, marine heatwaves (MHWs) have experienced a worldwide increase in duration, intensity, frequency and spatial extent. This trend has been particularly evident Mediterranean, where exceptional events were observed during summers of 2022, 2018 2003. study proposes twofold analysis MHWs focusing on their statistical characteristics physical causes. A satellite dataset is utilized to analyze via an index, called activity, which aggregates occurrence, intensity extent events....
Abstract We investigate the impact of Arctic sea ice loss on Atlantic meridional overturning circulation (AMOC) and North climate in a coupled general model (IPSL‐CM5A2) perturbation experiment, wherein is reduced until reaching an equilibrium ice‐free summer. After several decades we observe AMOC weakening caused by dense water formation Iceland basin due to warming surface waters, later compensated intensification Western Subpolar Atlantic. Consequently, slightly weakens deep, waters but...
Liquid films in steam turbines, present usual operating conditions, play a large but poorly understood part the wetness-born troubles (power losses and erosion). More knowledge is needed to estimate their impacts lessen effects. The aim of this paper propose verify model predict these liquid films. This based on modified Shallow-Water equations (integral formulation). It takes into account inertia, mass transfer, gravity, gas wall frictions, pressure, surface tension, droplet impacts,...
Abstract. The latest IPCC report describes an increase in the number and intensity of marine heatwaves (MHWs) a decrease cold-spells (MCSs) global ocean. However, these reported changes are not uniform on regional to local basis it remains unknown if coastal areas follow open ocean trends. Ocean temperature measurements collected by satellites (from 1982–2022) 13 buoys 1990–2022) analyzed Northeast Atlantic three subregions: English Channel, Bay Brest Biscay. activity metric, combining...
Coastal ecosystems are under climate and anthropogenic pressures. Extreme events as Marine Heatwaves (MHW) directly impact environmental conditions necessary to sustain biodiversity in coastal oceans. Recent results showed increasing occurrence intensity of MHW the Bay Biscay English Channel based on surface temperature observations. Combining satellite situ observations with recent high resolution numerical simulations, whole water column is investigated evaluate potential impacts pelagic...
In the past 40 years, marine heatwaves (MHWs) have experienced a worldwide increase in duration, intensity, frequency and spatial extent. This trend has been particularly evident Mediterranean, where exceptional events were observed during summers of 2022, 2018 2003. study proposes twofold analysis MHWs focusing on their statistical characteristics physical causes. A satellite dataset is utilized to analyze via an index, called activity, which aggregates occurrence, intensity extent events....
The European summer of 2022 has been widely recognized as the warmest since mid-19th century. Our updated analyses instrumental and reconstructed temperature series 1500 indicate that (June-to-August) was on record, exceeding previous hottest 2021 by a large margin. In fact, past three summers 2021–2023 have among ones last five centuries. By applying heatwave (HW) detection algorithm to reanalysis data, we identify HW events affected ample regions continent in mid-June, mid-July...
Correlation does not necessarily imply causation, and this is why causal methods have been developed to try disentangle true links from spurious relationships. In our study, we use two methods, namely the Liang-Kleeman information flow (LKIF) Peter Clark momentary conditional independence (PCMCI) algorithm, apply them four different artificial models of increasing complexity one real-case study based on climate indices in North Atlantic Pacific. We show that both are superior classical...
Abstract. Correlation does not necessarily imply causation, and this is why causal methods have been developed to try disentangle true links from spurious relationships. In our study, we use two methods, namely the Liang-Kleeman information flow (LKIF) Peter Clark momentary conditional independence (PCMCI) algorithm, apply them four different artificial models of increasing complexity one real-case study based on climate indices in North Atlantic Pacific. We show that both are superior...
The latest Intergovernmental Panel on Climate Change (IPCC) report describes an increase in the number and intensity of marine heatwaves (MHWs) a decrease cold spells (MCSs) global ocean. How- ever, these reported changes are not uniform regional to local basis, it remains unknown if coastal areas fol- low open-ocean trends. Surface ocean temperature mea- surements collected by satellites (from 1982–2022) 13 buoys 1990–2022) analyzed north- eastern Atlantic three...
Because the unsteady behavior of liquid films in steam turbines is a key point for additional friction losses and atomization process (that leads to coarse water generation), development dedicated model has been found necessary. A two-dimensional computational fluid dynamics code unstructured mesh being developed using finite volume method simulate this thin film. The aim predict formation waves film since it suspected be parameter atomization. Applied as first step plane plate, verified...