EGUsphere – The preprint repository hosted by the European Geosciences Union
EGUsphere, the not-for-profit open scientific repository of the European Geosciences Union (EGU), brings together preprints in the domain of Earth, Space, and Planetary sciences in a diverse, inclusive, and systematic collection of contributions, including:
EGUsphere is transparent and interactive, giving authors of presentations and preprints the opportunity to receive attributed comments from the public aimed at stimulating discussion, cooperation, and to revise their materials in open review.
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Recently-posted preprints
17 Feb 2026
JUICE-JANUS observations of Earth in preparation for the JANUS investigation of Jupiter’s atmosphereRicardo Hueso, Arrate Antuñano, Luisa María Lara, Katrin Stephan, Angelo Zinzi, Athena Coustenis, Yoav Yair, Mitsuteru Sato, Junichi Haruyama, Amy Simon, Cecilia Tubiana, Luca Penasa, Livio Agostini, Alice Luchetti, Alessio Aboudan, Michael Aye, Elke Kersten, Klaus-Dieter Matz, Romolo Politti, Frank Trauthan, Ry Evill, Ines Belgacem, Takahashi Yukihiro, Jose María Castro-Marín, Vincenzo Della Corte, Stubbe Hviid, Thomas Roatsch, Nicole Schmitz, Manish Patel, Ganna Portyankina, and Pasquale Palumbo
EGUsphere,https://doi.org/10.5194/egusphere-2026-710, https://doi.org/10.5194/egusphere-2026-710, 2026
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JANUS, the high-resolution camera on ESA’s JUICE mission, observed Earth during the August 2024 Lunar–Earth Gravity Assist. Images from a close flyby captured night- and day-side atmospheric phenomena, and a distant view resulted in a low-resolution Earth portrait. These observations validate JANUS performance and demonstrate the instrument’s capabilities. We focus our analysis on characterizing atmospheric systems that provide relevant examples for future studies of Jupiter’s atmosphere.
17 Feb 2026
Predicting Organic–Inorganic Aerosol Efflorescence Using Thermodynamically Modeled ViscosityShanshan Chen, Qishen Huang, Ying Li, Shu-Feng Pang, Pai Liu, and Yun-Hong Zhang
EGUsphere,https://doi.org/10.5194/egusphere-2026-117, https://doi.org/10.5194/egusphere-2026-117, 2026
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Atmospheric aerosols undergo a key phase transition during drying, known as efflorescence, which strongly influences their growth, light scattering, and chemical reactivity. We show that viscosity is the primary factor controlling efflorescence in mixed organic–inorganic aerosols. By combining thermodynamic modeling with laboratory data, we develop a predictive framework that improves understanding of aerosol phase behavior and its implications for air quality and climate.
17 Feb 2026
Spatiotemporal dynamics of atmospheric CO2 across China revealed by long-term, high-resolution satellite-derived dataQingqing He, Yuan Liu, Zizheng Li, Tong Ye, and Jingru Cao
EGUsphere,https://doi.org/10.5194/egusphere-2025-5647, https://doi.org/10.5194/egusphere-2025-5647, 2026
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We created a twenty-year, high-detail record showing how carbon dioxide changed across China each day by combining satellite observations, environmental data, and machine-learning methods. Using this record together with enhancement analysis, we identified long-lasting emission hotspots within cities and regions and how they shifted over time. The work provides a new tool for understanding carbon emissions, guiding climate action, and evaluating future policies.
17 Feb 2026
Interannual and Seasonal Evolution of Supraglacial Channel Networks on Nivlisen Ice Shelf, East AntarcticaJiao Chen, Rebecca A. Hodge, Stewart S. R. Jamieson, and Chris R. Stokes
EGUsphere,https://doi.org/10.5194/egusphere-2025-5562, https://doi.org/10.5194/egusphere-2025-5562, 2026
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Supraglacial channel networks mediate meltwater transport over ice shelves and may influence their stability. Our mapping of Nivlisen Ice Shelf from satellite imagery shows significant variation in interannual and seasonal channel extent. During warm summers channels become increasingly connected, redistributing meltwater from high to low elevations across the ice shelf. Channel location is controlled by ice shelf structure, and annual extent is correlated with regional air temperature.
17 Feb 2026
Nonlinear dynamics of time-variable slope circulationAnna Lina Petruseviciute Sjur, Pål Erik Isachsen, Johan Nilsson, and Susan Allen
EGUsphere,https://doi.org/10.5194/egusphere-2026-778, https://doi.org/10.5194/egusphere-2026-778, 2026
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Ocean currents along continental slopes do not respond symmetrically to changing winds. This asymmetry arises from interactions between the flow and seafloor bumps. Using simplified simulations, we show that this asymmetry manifests differently for short and long wind forcing periods. These effects are likely missed in coarse-grained climate models, with implications for representing ocean flow in the Arctic.
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