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Journal of Geophysical Research: Space Physics

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Mike Liemohn, the outgoing Editor-in-Chief of JGR: Space Physics
Posted inEditors' Vox

Six Years with JGR: Space Physics

by Michael W. Liemohn 20 March 20207 April 2023

The outgoing Editor in Chief of JGR: Space Physics reflects on his tenure and expresses his appreciation to all those who contributed to the success of the journal over recent years.

Illustration of how “electron wings” form around a spacecraft traveling through a plasma
Posted inResearch Spotlights

“Electron Wings” Can Interfere with Spacecraft Measurements

by Mark Zastrow 26 February 202030 September 2021

Spacecraft sometimes produce a form of electrical self-interference as they zip through plasmas in space—a previously unreported effect that may be lurking in old data sets.

A difference image revealing the main features of Jupiter’s aurora
Posted inEditors' Highlights

Using a Machine to Help Us Learn About Jupiter’s Aurora

by Michael W. Liemohn 9 December 201927 January 2022

A first usage of principal component analysis on Hubble images of Jupiter’s auroral ovals reveals the most common patterns, and machine learning classification reveals their physical causes.

Thunderclouds over the Mediterranean coast of Spain are illuminated by lightning
Posted inResearch Spotlights

Charging Thunderclouds Affect Ionospheric Conductivity

by David Shultz 6 September 20196 March 2023

As thunderstorm updrafts strengthen, electrification of clouds can heat the lower ionosphere, explaining prolonged disturbances to radio waves in the rarefied atmospheric layer.

Diagram of two Cassini spacecraft orbit trajectories during the “Grand Finale”
Posted inEditors' Highlights

Newly Discovered Electric Current System Very Close to Saturn

by Michael W. Liemohn 20 August 201916 November 2021

In the tightly confined region between the innermost ring and the planet’s upper atmosphere, the Cassini spacecraft observed signatures of a previously undetected current system.

Plots of average wave electric field power spectral densities on the nightside
Posted inEditors' Highlights

Human-made Emissions Modify Electron Space Environment

by Viviane Pierrard 2 August 20198 August 2022

Very Low Frequency transmitters used for communications with submarines modify the dynamics of energetic electrons in the inner radiation belt and the slot region.

Measurements of electron density from the COSMIC satellite
Posted inEditors' Highlights

Holistic Views of the Nighttime Ionosphere

by Michael W. Liemohn 22 July 201922 March 2023

The nightside ionosphere, at latitudes away from the auroral zone, should have very little charged particle density, but it doesn’t. A new comprehensive study of satellite data explains why.

Illustration of observations of airglow collected by the International Space Station
Posted inResearch Spotlights

The When and Where of Mesospheric Bores Revealed

by David Shultz 17 July 201916 March 2023

In a new study, the enigmatic gravity waves were seen most frequently at equatorial latitudes and propagating from the winter to the summer hemisphere.

Posted inEditors' Highlights

Solar Properties Rival for Control of Mars’s Bow Shock

by Michael W. Liemohn 9 July 20194 May 2022

While most planetary bow shocks are controlled by the solar wind, at Mars the solar EUV flux is equally important.

Posted inEditors' Highlights

Red and Green Aurora Stop and Go for Different Reasons

by Viviane Pierrard 5 July 201911 August 2022

Green-line arc is found to be embedded within large-scale upward field aligned currents while red-line-only arc is found to be associated with low-energy precipitation bursts.

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Features from AGU Publications

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12 May 202512 May 2025
Editors' Highlights

First Benchmarking System of Global Hydrological Models

7 May 20257 May 2025
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Decoding Crop Evapotranspiration

6 May 20256 May 2025
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