Centre National de la Recherche Scientifique

An energetic perspective on the impact of the Atlantic Multidecadal Variability on the West African Monsoon

Abstract. This study explores mechanisms by which the Atlantic Multidecadal Variability (AMV) drives multidecadal changes in the West African Monsoon (WAM), with a focus on Sahel rainfall. We investigate this connection through an energetic perspective using atmosphere-ocean coup...

A Causal Examination of the Solar Influence on Holocene Climate

Abstract Variations in Total Solar Irradiance (TSI) have long been hypothesized to influence global mean surface temperature (GMST) on multidecadal to millennial timescales, but empirical evidence has remained elusive. Here, we explore the link between solar variability and clima...

Life finds its way in seaports: environmental DNA monitoring in the Grand Port Maritime de Guadeloupe shows vertebrate richness but reduced phylogenetic diversity

Abstract Ports are increasingly recognized as distinct urban marine ecosystems (UME) shaped by intense human activities, yet their biodiversity remains poorly documented, particularly in tropical regions. Environmental DNA (eDNA) metabarcoding offers a powerful, non-invasive appr...

Calpain inhibition prevents high-glucose-induced autophagy blockade and mitochondrial fragmentation in endothelial cells and preserves vascular functions in diabetic mice

Endothelial dysfunction is a major contributor to diabetic vascular complications, yet the mechanisms linking hyperglycemia to impaired endothelial homeostasis remain insufficiently defined. This study identifies calpains as key regulators of endothelial autophagy and mitophagy u...

Paleoenvironmental and paleoclimatic reconstruction in the Western Mediterranean during the Late Early Pleistocene

Abstract. The major climate change recorded during the Early-Middle Pleistocene Transition (1.4–0.4 Ma) is characterized by an increase in the length of climatic cycles from 41 to 100 ka. During this period, the Mediterranean climate underwent aridification associated with a drop...

2D Covalent Organic Frameworks as Robust n‐Type Organic Mixed Ionic‐Electronic Conductors for Electrochemical Transistors

ABSTRACT Organic mixed ionic‐electronic conductors (OMIECs) with exclusive electrochemical modulation and coupling between ions and electrons have exhibited intriguing efficiencies in bioelectronics, logic circuits, and wearable devices. However, OMIECs are typically linear polym...

Thermal signature of Sargassum aggregations from Landsat 9 observations.

Since 2011, Sargassum blooms in the Tropical Atlantic have led to massive strandings along coastlines, posing significant ecological, economic, and public health threats. A key research challenge is to improve our understanding of the environmental factors influencing Sargassum g...

Necessary Conditions for Shock Solutions to a Hyperelastoplastic Model

We propose a formulation of hyperelastoplasticity such that one can pass to the limit regime of rate-independent plasticity. It results in a family of modified entropy inequalities. A key ingredient is the Hencky logarithmic plastic tensor. A discussion of possible shock solution...

Poincaré inequality and quantitative De Giorgi method for hypoelliptic operators

We propose a systematic approach based on trajectories to prove a Poincaré inequality for weak non-negative sub-solutions to hypoelliptic equations with an arbitrary number of Hörmander commutators, both in the local and in the non-local case. As a consequence, we deduce the weak...

On the collimation properties of jets with finite Poynting flux launched from Keplerian accretion discs

Abstract It is generally accepted that the launching of astrophysical jets requires a large-scale magnetic field threading a central object (black hole or star) and/or its surrounding accretion disc. However, the collimation mechanism far away from the central object has not yet...

Organizational Monsters and the Shaping of Systemic Irresponsibility

Abstract Organizational monsters populate capitalist societies and shape the conditions of systemic irresponsibility. Building on organizational sociology and critical approaches, I argue that organizational monsters are powerful yet ambiguously organized and unevenly recognized...

Modeling of Diamond Trench Metal Oxide Semiconductor Barrier Schottky Rectifier Based on Dynamic Reverse Bias Simulation Framework

This work presents an electrothermal optimization study of diamond‐based trench metal oxide semiconductor (MOS) barrier Schottky (TMBS) rectifiers using mixed‐mode drift‐diffusion technology computer aided design simulations under quasi‐static and dynamic reverse‐bias conditions....

Synergistic Grain Boundary and Phonon Engineering Enables Ultrahigh Thermoelectric Performance in Mg 3 (Sb, Bi) 2 ‐Based Materials

ABSTRACT Thermoelectric Mg 3 (Sb, Bi) 2 has emerged as a rising star in virtue of its promising thermoelectric performance and abundant constituent elements. However, its practical application is hindered by challenges in synthesis and the strong coupling between electrical and t...

Detectability of Forced ENSO Changes Under Global Warming: Insights From the Recharge Oscillator

Abstract We use perfect‐model, large‐ensemble nonlinear Recharge Oscillator (RO) simulations to quantify ENSO internal variability and the detectability of forced changes in ENSO characteristics. Fixed‐parameter simulations show that linear trends in ENSO standard deviation, peri...

Tracking Variability in Atmospheric, Oceanic, and Riverine Inputs to the Iberian Margin Over the Last 250 kyr

Abstract The Iberian Margin provides an exceptional archive of climate variability due to its high sedimentation rates. However, uncertainties persist regarding the provenance of terrigenous detrital sediments on the Iberian Margin, and the climate‐driven changes in their source...

Polyphasic and genomic characterisation of Streptomyces zimensis sp. nov., a halotolerant Actinomycetota from the Saline Lake Zima in Morocco

Abstract Members of the phylum Actinomycetota are widely distributed across diverse environments and are well known for their metabolic versatility and capacity to produce bioactive compounds. In this study, strain ZE1316R2Aᵀ was isolated from the saline water collected from Lake...

Real-World Use of Adjuvant Nivolumab for Resected Stage III–IV Melanoma: 2-Year Analysis of AdjuMel

Following the positive findings of the phase 3 CheckMate 238 trial, adjuvant nivolumab has become a standard therapy in patients with completely resected stage III–IV melanoma. The prospective, ongoing AdjuMel study is evaluating the real-world use, effectiveness, and safety of a...

LDL Cholesterol Lowering With Evolocumab Before Percutaneous Coronary Intervention for Acute Myocardial Infarction

Importance: Proprotein convertase subtilisin-kexin type 9 (PCSK9) inhibition is recommended as second- or third-line lipid-lowering therapy after myocardial infarction (MI), resulting in prolonged periods of inadequate low-density lipoprotein cholesterol (LDL-C) control. Whether...

Optimising bat-friendly curtailment algorithms for wind turbines

Wind turbines worldwide cause high mortality in long-lived bats through collisions. To mitigate these impacts, operators commonly apply blanket curtailment by stopping turbine blades under low wind speed and mild temperature, when bat activity is often high and energy production...

TESS Observations of Stochastic Low-frequency Variability in Extreme Helium Stars

Abstract Extreme helium stars (EHes) are low-mass hydrogen-deficient stars thought to be the products of double white dwarf mergers. Despite prolonged ground-based observations, there is no consensus on the properties of their photometric variability. In this article, we present...