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Ciências da Terra

jSEDI

[Journal of Studies of Earth’s Deep Interior]

jSEDI

Journal of Studies of Earth’s Deep Interior

Fundada em 2025, journal of Studies of Earth’s Deep Interior é uma revista multidisciplinar dedicada à publicação de investigação original em língua inglesa no domínio das geociências e, mais especificamente, da Terra profunda. Editada pelas ENS Éditions, a revista é publicada anualmente, sendo os artigos publicados à medida que são recebidos.

  • Diretor de publicação: Emmanuel Trizac
  • Redatores responsáveis: John Hernlund e Stéphane Labrosse
  • Tipo de suporte: digital
  • Periodicidade: anual
  • Ano de criação: 2025
  • Data de disponibilização online na Episciences: 2025
  • Disciplinas: Ciências da Terra
  • Idioma da publicação: inglês
  • Processo de avaliação: estudo cego o avaliação aberta
  • Licença CC BY 4.0
  • Editor: ENS Éditions
    • Endereço postal: 15 parvis René Descartes, BP 7000, 69342 Lyon cedex 07
    • País: França
  • Contacto: jsedi AT episciences.org
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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
May 06, 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
May 05, 2026
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Física

OPS

[Open Plasma Science]

OPS

Open Plasma Science

Criada em 2023, a Open Plasma Science é uma revista com revisão por pares apoiada pela Université de Lorraine. Publica artigos em inglês que abrangem a ciência dos plasmas no sentido mais lato, desde os plasmas de fusão aos plasmas de descarga de alta e baixa pressão, desde as interacções plasma-superfície ou plasma-líquido à turbulência nos plasmas, desde a propulsão aos processos de fabrico que utilizam plasmas.

  • Diretora de publicação: Hélène Boulanger
  • Redator responsável: Jérôme Moritz
  • Tipo de suporte: digital
  • Periodicidade: gradual
  • Ano de criação: 2023
  • eISSN: 3076-1468
  • Data de disponibilização online na Episciences: 2023
  • Disciplinas: física dos plasmas
  • Idiomas da publicação: inglês
  • Processo de avaliação: estudo cego
  • Licença CC BY 4.0
  • Editor: Université de Lorraine
    • Endereço postal: Institut Jean Lamour, Campus Artem, 2 allée André Guinier, BP 50840, 54011 Nancy Cedex
    • País: França
  • Contacto: ops AT episciences.org
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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
May 13, 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
February 11, 2026
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Ciências humanas e sociais

Transformations

[A DARIAH Journal]

Transformations

A DARIAH Journal

Transformations: A DARIAH Journal é uma revista multilingue criada em 2024 pela infraestrutura de investigação europeia DARIAH ERIC. Publica regularmente números temáticos nos domínios das humanidades digitais, das ciências humanas e sociais e das artes. A revista está particularmente interessada na utilização de ferramentas, métodos e recursos digitais numa abordagem reprodutível. Aceita contribuições científicas sobre corpora de dados, fluxos de trabalho e análise de software.

  • Diretora de publicação: Agiatis Benardou
  • Redator-chefe: Toma Tasovac
  • Redactores-gerais: Anne Baillot, Françoise Gouzi
  • Tipo de suporte: digital
  • Periodicidade: anual
  • Ano de criação: 2024
  • Data de disponibilização online na Episciences: 2024
  • eISSN: 3095-3200
  • Disciplinas: humanidades digitais, ciências sociais e humanas, artes
  • Idiomas da publicação: alemão, inglês, francês
  • Processo de avaliação: avaliação aberta
  • Licença CC BY 4.0
  • Editor: DARIAH ERIC
    • Endereço postal: 54 boulevard Raspail, 75006 Paris
    • País: França
  • Contacto: transformations AT episciences.org
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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
November 06, 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
October 14, 2025
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