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Sciences de la Terre

jSEDI

[Journal of Studies of Earth’s Deep Interior]

jSEDI

Journal of Studies of Earth’s Deep Interior

Créée en 2025, journal of Studies of Earth’s Deep Interior est une revue pluridisciplinaire consacrée à la publication de recherches originales en anglais sur les sciences de la terre et plus particulièrement sur la terre profonde. Éditée par ENS Éditions, la revue est annuelle et publie les articles au fil de l’eau.

  • Directeur de la publication : Emmanuel Trizac
  • Rédacteurs en chef : John Hernlund et Stéphane Labrosse
  • Type de support : électronique
  • Périodicité : annuelle
  • Année de création : 2025
  • Date de mise en ligne sur Episciences : 2025
  • Disciplines : sciences de la Terre
  • Langue de publication : anglais
  • Procédure d’évaluation : évaluation ouverte ou en simple aveugle
  • Licence CC BY 4.0
  • Éditeur : ENS Éditions
    • Adresse postale : 15 parvis René Descartes, BP 7000, 69342 Lyon cedex 07
    • Pays : France
  • Contact : jsedi AT episciences.org
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Derniers articles

Principal component analysis of the 2010 reversal of core-surface flow beneath the Pacific Ocean

This paper is published after peer review in the Journal of Studies of Earth's Deep Interior (jSEDI).In this paper, we investigate the behaviour of the fluid flow in the Earth's outre core throughout the 21st century. The flow of the liquid iron cocktail in the Earth's outer core generates the geomagnetic field and its rate of change, the secular variation. Assuming that magnetic diffusion is negligible on timescales shorter than 100 years, we can invert SV observations from ground observatories and geomagnetic satellites for models of the fluid flow at the top of the core. We investigate core-surface flow, modelled from observations of SV from 1997 to 2025. Historically, the core-surface flow has been predominantly westward, as required to maintain a westward-drifting magnetic field, which is associated with a planetary gyre of westward flow, offset from the Earth’s rotation axis. This gyre does not affect the flow in the equatorial Pacific, and we find that the flow here changes in 2010 from weakly westward to strongly eastward. Our model suggest that the Pacific eastwards flow has been weakening since 2020. The rise of the strong eastward flow in the Pacific is contemporary with a change in behaviour in the inner core, as observed from geodesy and seismology, and we hypothesise that these changes in the deep interior triggered the inferred changes in flow beneath the Pacific. 
Madsen, Frederik Dahl
06 mai 2026
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Geodynamo simulations spanning millennia in the physical conditions of Earth's core

A geodynamo simulation is presented where the Earth's core density, rotation rate, convective power and electrical conductivity are matched, while viscous losses are maintained minor in the force balance and power budget. Improving over earlier preliminary calculations, the simulation is integrated over near 1700 years in physical time, and realistically renders the time scale range between interannual hydromagnetic waves and secular convective motions. The solution has been obtained by gradually approaching these conditions along a path in model parameter space. A quasi-geostrophic, magneto-Archimedes-Coriolis (QG-MAC) force balance is confirmed, with the characteristic length scale of the system remaining near the planetary scale. Without the need for extrapolation, the morphology, variations and dynamics of the velocity, convective density anomaly and magnetic fields are in excellent quantitative agreement with geomagnetic and geodetic observations supplied over the past centuries by navigation, observatories and satellites. In particular, the simulation reveals the contribution of interdecadal magneto-Coriolis waves to geomagnetic variations in the vicinity of 60-yr periods. This direct validation of the convective geodynamo paradigm additionally offers a quantitative and first principle-based physical link between the observable signals and deep Earth geodynamic parameters. The model confirms that a convective power (or Ohmic dissipation) level near 3 TW is needed to account for the observed geomagnetic variations, and that the top of the core should be convectively neutral or unstable. Explaining the core-originated interannual to decadal variations of the length of day through electromagnetic core-mantle coupling requires a lower mantle conductance on the order of 10^9 S. It may also become possible to constrain the outer core electrical conductivity from the observed patterns of interannual magneto-Coriolis waves. Finally, the simulation can be considered a reliable source of prior information for solving geomagnetic inverse and prediction problems.
Aubert, Julien
05 mai 2026
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Physique

OPS

[Open Plasma Science]

OPS

Open Plasma Science

Créée en 2023, Open Plasma Science est une revue à comité de lecture portée par l’Université de Lorraine. Elle publie en anglais des articles couvrant la science des plasmas au sens large, allant des plasmas de fusion aux plasmas de décharges haute et basse pression, des interactions plasma-surface ou plasma-liquide à la turbulence dans les plasmas, de la propulsion aux procédés d’élaboration utilisant les plasmas.

  • Directrice de la publication : Hélène Boulanger
  • Rédacteur en chef : Jérôme Moritz
  • Type de support : électronique
  • Périodicité : au fil de l’eau
  • Année de création : 2023
  • Date de mise en ligne sur Episciences : 2023
  • eISSN : 3076-1468
  • Disciplines : physique des plasmas
  • Langue de publication : anglais
  • Procédure d’évaluation : évaluation en simple aveugle
  • Licence CC BY 4.0
  • Éditeur : Université de Lorraine
    • Adresse postale : Institut Jean Lamour, Campus Artem, 2 allée André Guinier, BP 50840, 54011 Nancy Cedex
    • Pays : France
  • Contact : ops AT episciences.org
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Derniers articles

Characterization of a Plasma Source for Water Treatment Using Electrical, Optical, and Chemical Diagnostics

Hospital and urban wastewaters constitute major reservoirs of multidrug-resistant bacteria (MRB), antibiotic resistance genes (ARGs), and persistent pharmaceutical contaminants, which are only partially removed by conventional treatment plants. As a result, these pollutants are frequently detected in treated effluents destined for environmental discharge or reuse, raising serious public health concerns-especially for agricultural irrigation. This study explores a novel immersed dielectric barrier discharge (DBD) plasma source engineered for point-of-use decontamination of wastewater at emission sites. The plasma device was thoroughly characterized by electrical, optical, and chemical diagnostics to elucidate its operating regimes and capacity to generate reactive oxygen and nitrogen species (RONS) at the plasma-liquid interface. Findings demonstrate that the composition of the carrier gas critically shapes the production and transfer of short-and long-lived oxidants into the liquid phase. These results provide quantitative insights that support the ongoing optimization of plasma-based advanced oxidation systems for decentralized water treatment. They further illustrate how the careful control of plasma and gas composition can enhance the formation and transfer of oxidants, contributing to the broader field of plasma-liquid applications for the mitigation of emerging contaminants.

Saba, Maria
13 mai 2026
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Modeling of evaporation of macroparticles of vacuum arcs by an electron beam

The evaporation of droplets in an arc plasma flow under the action of an electron beam injected into the arc plasma and the condition of direct heating of microdroplets by beam electrons are considered. Analytical modeling shows that droplets ≤1 μm in size can be completely evaporated over time scales typical for cathodic arc deposition systems. It is shown that small microdroplets evaporate more intensively. The lower limit working points in terms of plasma electron density, and the electron energy and density of the injected energetic electrons required for droplet evaporation are found.   
Litovko, Iryna
11 février 2026
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Sciences humaines et sociales

Transformations

[A DARIAH Journal]

Transformations

A DARIAH Journal

Transformations: A DARIAH Journal est une revue multilingue créée en 2024 par l’infrastructure de recherche européenne DARIAH ERIC. Elle publie des numéros thématiques au fil de l’eau dans le domaine des humanités numériques, des sciences humaines et sociales, et des arts. La revue porte un intérêt particulier à l’utilisation d’outils, de méthodes et de ressources numériques dans une approche reproductible. Elle accueille des contributions scientifiques portant sur des corpus de données, des workflows ainsi que des analyses de logiciels.

  • Directrice de la publication : Agiatis Benardou
  • Rédacteur en chef : Toma Tasovac
  • Secrétaires de rédaction : Anne Baillot, Françoise Gouzi
  • Type de support : électronique
  • Périodicité : annuelle
  • Année de création : 2024
  • Date de mise en ligne sur Episciences : 2024
  • eISSN: 3095-3200
  • Disciplines : humanités numériques, sciences humaines et sociales, arts
  • Langues de publication : allemand, anglais, espagnol, français
  • Procédure d’évaluation : évaluation ouverte
  • Licence CC BY 4.0
  • Éditeur : DARIAH ERIC
    • Adresse postale : 54 boulevard Raspail, 75006 Paris
    • Pays : France
  • Contact : transformations AT episciences.org
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Derniers articles

Introduction to Workflows – Part 2

In this second part of the introduction to the first issue of Transformations. A DARIAH journal (dedicated to workflows), we present three articles, respectively dedicated to metadata-based, text-based and musicology workflows.
Baillot, Anne
06 novembre 2025
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Supporting executable scientific workflows in a clustered Infrastructure: DARIAH-IT and H2IOSC

Workflows have become essential in digital humanities, enabling the formalisation, automation and reproducibility of complex research processes. As the humanities increasingly adopt data-driven methodologies, workflows offer structured approaches to manage diverse data and tools while supporting transparency and collaboration. Recognising this need, DARIAH-IT has advanced research infrastructure development by focusing on workflow-based services within the H2IOSC (Humanities and Cultural Heritage Italian Open Science Cloud) project. DARIAH-IT leads the design and implementation of a national cloud system to support digital humanities research, ensuring interoperability, FAIR data practices and semantic integration across disciplines. Central to DARIAH-IT’s effort within H2IOSC is AEON (dAriah sErvice Oriented iNfrastructure), a platform that enables the creation, execution and management of scientific workflows. AEON integrates service provisioning, semantic validation and runtime orchestration, supporting reproducible research and collaborative practices.
Degl'Innocenti, Emiliano
14 octobre 2025
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