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About AGU
Career Development
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Publications & News
Policy & Outreach

Who We Are

AGU Membership Value

Empower your future today!

Ethics, Diversity & Inclusive Science

Promoting an inclusive scientific culture

Membership Directory

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Programs & Initiatives

Advance your career and connect with peers

Find Your Community

Connect by science, interest and identity

AGU Net Zero Headquarters

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View 2025 honorees

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Upper Atmosphere Processes and Space Weather

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Space Weather VOL.24 ISSUE 7 | 28 July 2026

The Impact of the May 2024 Geomagnetic Storm on TRISAT Orbital Decay: A TLE‐Based Analysis With a Lifetime Forecast

Nejc Kosanič + Iztok Kramberger

The 10–13 May 2024 geomagnetic storm was one of the strongest space‐weather events of Solar Cycle 25 and produced a major expansion of the thermosphere, substantially increasing...

Geophysical Research Letters VOL.53 ISSUE 15 | 3 August 2026

Long‐Term Trends in the Ionospheric Equivalent Slab Thickness as a Proxy of Climate Change in the Ionosphere

A Pignalberi + T Alberti

Global warming warms the lower atmosphere, but cools and contracts the upper atmosphere. These changes also affect the ionosphere, altering the vertical distribution of plasma...

Journal of Geophysical Research: Atmospheres VOL.131 ISSUE 15 | 4 August 2026

The North Atlantic Tends to Amplify the Arctic Stratosphere‐Induced Eurasian Subseasonal Surface Air Temperature Anomalies During the Cold Season

Shengyi Qian + Zhuojun Dai + Haibo Hu ...

Based on atmospheric reanalysis data from 1979 to 2024 during the cold season, this study investigates the evolutionary mechanisms and predictability of the leading EOF mode...

Journal of Geophysical Research: Space Physics VOL.131 ISSUE 7 | 28 July 2026

Evolution of Atmospheric Oxygen Escape From Earth Since the Great Oxidation Event

Maria Luisa Alonso Tagle + Aline Vidotto + Caue Borlina ...

The present study reconstructs the evolution of Earth's oxygen escape into space since the Great Oxidation Event, approximately 2450 Myr ago. We use a semi‐empirical model...

Journal of Geophysical Research: Space Physics VOL.131 ISSUE 7 | 27 July 2026

On the Velocity and Energy Evolution of Electron Holes Mediated by Ion‐Repulsive Effects: A Simulation Study

Yue Dong + Zhigang Yuan + Honghong Wu ...

We perform one‐dimensional (1‐D) electrostatic particle‐in‐cell simulations with two electron beams and two ion components to investigate the velocity and energy evolution...