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geochemistry

Cartoon illustration of the possible distribution of materials of different origins in the interior of a Mars-size planetary embryo.
Posted inEditors' Highlights

How Not to Homogenize a Planet

by Laurent G. J. Montési 28 April 202112 October 2022

Even the strong heating from short-lived aluminium-26 (26Al) would not be able to homogenize the interior of a Mars‐sized planetary embryo.

The Emme River in Switzerland
Posted inResearch Spotlights

Tracing Water from River to Aquifer

Aaron Sidder, freelance science writer by Aaron Sidder 20 April 20216 February 2023

A new technique using dissolved noble gas tracers sheds light on how water moves through an aquifer, with implications for water resources and their vulnerability to climate change.

Tree rings visible in a slice of oak
Posted inNews

Oak Trees Offer a Continuous Climate Record for Central Europe

by Stacy Kish 2 April 20212 September 2022

A method using nonpooled, continuous stable carbon and oxygen isotopes recorded in oak trees benefits climate reconstructions.

Looking out from inside Lower Antelope Canyon, with the sky near the top of the frame. Characteristic layering in the sandstone is visible.
Posted inResearch Spotlights

The First Angstrom-Scale View of Weathering

Kate Wheeling, freelance science writer by Kate Wheeling 15 March 202113 October 2022

Researchers observe how water vapor and liquid alter sedimentary rocks through physical and chemical processes.

Cutaway view of a rocky planet’s layered interior structure with a nebula in the background
Posted inNews

Superlasers Shed Light on Super-Earth Mantles

Kimberly M. S. Cartier, News Writing and Production Intern for Eos.org by Kimberly M. S. Cartier 10 March 202130 September 2021

By compressing iron oxide to pressures expected inside a large and rocky exoplanet, scientists discovered that such mantles could layer, mix, and flow in ways very different from those inside our planet.

Illustration of a coccolithophore against a blue background
Posted inResearch Spotlights

The Alkalinity Trap at the Bottom of the World

Elizabeth Thompson by Elizabeth Thompson 9 February 202117 August 2022

Tiny microorganisms in the Southern Ocean affect the way the rest of the world’s seas respond to carbon dioxide.

A pink laser sublimates an ice core in a scientific instrument chamber.
Posted inNews

The Catcher in the Ice

Bas den Hond, Science Writer by Bas den Hond 22 January 20212 September 2022

There are three ways to extract gases from an ice core. The cleanest one, sublimation, is getting easier.

Map showing sea surface salinity response to Hurricane Irma in 2017
Posted inEditors' Highlights

Hurricanes Wakes Show Asymmetrical Response in Ocean Salinity

by J. Sprintall 21 January 20211 February 2023

It’s well known that hurricanes can substantially impact ocean surface temperature, but a new study shows they can also induce an ocean salinity response in unexpected ways.

Plot showing X-Ray Diffraction patterns for products from Mars chamber electrostatic discharge experiments using hydrated magnesium sulfate salt starting materials.
Posted inEditors' Highlights

Martian Dust Activities Induce Electrochemistry

by Mariek E. Schmidt 7 January 202115 March 2023

Amorphous materials generated from sulfur and chloride salts by electrostatic discharge in a Mars chamber suggest widespread electrical processes during dust activities.

A group of snailfish, animals that live in deep-sea ecosystems, feeding on a dead fish
Posted inNews

Sinking Fish May Fast-Track Mercury Pollution to the Deep Sea

by Carolyn Wilke 22 December 202018 March 2022

Isotopic analysis indicates that mercury found in deep-sea organisms may have an origin in carrion from near the surface.

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Over a dark blue-green square appear the words Special Report: The State of the Science 1 Year On.

Features from AGU Publications

Research Spotlights

Our Ocean’s “Natural Antacids” Act Faster Than We Thought

30 January 202630 January 2026
Editors' Highlights

Cows, Coal, and Chemistry: The Role of Photochemistry in Methane Budget

27 January 202623 January 2026
Editors' Vox

Bridging the Gap: Transforming Reliable Climate Data into Climate Policy

16 January 202616 January 2026
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