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Anni Määttänen

Editor, JGR: Planets (2019- )

Diagram showing the molecular hydrogen in Callisto’s atmosphere.
Posted inEditors' Highlights

Callisto’s H Corona: Offspring of the Surface or the Atmosphere?

by Beatriz Sánchez-Cano and Anni Määttänen 7 December 202222 July 2024

The mostly unknown Callisto’s H corona is created by a global tenuous H2 atmosphere and not by surface water as previously believed, providing the first evidence for H2 in Callisto’s atmosphere.

Visualization of a methane plume in Mars’ atmosphere during the northern summer season as retrieved from NASA's Infrared Telescope Facility at Mauna Kea, Hawaii.
Posted inEditors' Vox

The Mystery of Methane on Mars Thickens

by Germán Martinez, Anni Määttänen and David Baratoux 15 February 20223 January 2023

Two recently published papers zoom in on the mystery source of methane in the Martian atmosphere.

Posted inEditors' Vox

Lifting the Veil on Martian Dust Storms

by Anni Määttänen and C. Newman 23 June 20202 February 2022

A special collection in JGR Planets presents insights from a long-awaited global dust storm on Mars in 2018 that was closely scrutinized by five orbiting and two landed spacecraft.

Figure showing the zonal winds in the upper atmosphere of Pluto as a function of season for three Pluto years.
Posted inEditors' Highlights

Capturing Pluto’s Heartbeat in a Computer

by Anni Määttänen 8 April 202017 February 2023

Unprecedented global climate model simulations, incorporating observational data from the New Horizons mission, reveal atmospheric circulations driven by a large ice cap on Pluto.

Photos of a sensor on board the Curiosity rover before and after a dust storm
Posted inEditors' Highlights

Curiosity Monitors Rare Global Dust Storm From Mars’s Surface

by Anni Määttänen 12 August 201924 April 2024

Since the 1970s, no surface platform had made meteorological measurements of a global dust storm on Mars, but last summer NASA’s Curiosity rover witnessed one of these rare events.

A view of a Washington, D.C., skyline from the Potomac River at night. The Lincoln Memorial (at left) and the Washington Monument (at right) are lit against a purple sky. Over the water of the Potomac appear the text “#AGU24 coverage from Eos.”

Features from AGU Publications

Research Spotlights

Simplicity May Be the Key to Understanding Soil Moisture

23 May 202523 May 2025
Editors' Highlights

Creep Cavitation May Lead to Earthquake Nucleation

22 May 202521 May 2025
Editors' Vox

Decoding Crop Evapotranspiration

6 May 20256 May 2025
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