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geochemistry

In this photograph of Jiang Co, a cloudy sky casts shadows over low hills in the background while the lake water, in the midground, features gray-blue-green tones. Spiky tufts of brown grass grow on the shores in the foreground, with dark angular cobbles studding reddish sand.
Posted inNews

Mammal Droppings Preserve Human and Climate History on the Tibetan Plateau

by Alka Tripathy-Lang 11 December 202327 September 2024

Geochemical signatures in sediment, which includes organic molecules from human and animal poop, help scientists track the rise and fall of the Tibetan Empire.

A portion of a cream-colored planet covered with pale swirls and partially in shadow is shown against the blackness of space broken by pinpoints of light. A hazy atmosphere is visible around the planet.
Posted inENGAGE, News

These Four Exoplanets Have Wild, Rocky Weather

by Elise Cutts 7 December 20237 December 2023

On many exoplanets, conditions are so exotic that minerals form clouds and fall as rain. Recent studies revealed the rocky weather on these four exoplanets in more detail than ever before.

Side view of the ocean surface.
Posted inNews

An Electrifying Approach to Carbon Capture

by Bill Morris 7 December 20237 December 2023

A new sodium-ion “battery” promises an environmentally friendly method of sequestering carbon in the ocean, but experts remain cautious.

A row of black volcanic scones in Halema’uma’u in Hawaii eject lava into the air. The background is obscured by smoke from the lava.
Posted inResearch Spotlights

Humans Have Boosted Atmospheric Mercury Concentrations Sevenfold

by Rebecca Dzombak 3 November 20233 November 2023

A new baseline of volcanic contributions to the global mercury cycle reveals how drastically human activities have increased the element’s concentration in the atmosphere.

A flaming asteroid entering a planet’s atmosphere
Posted inNews

Meteor Impact Site Holds 200-Million-Year-Old Atmospheric Snapshot

by Elise Cutts 19 October 202329 November 2023

Minerals formed in short-lived hydrothermal systems set off by a meteor impact in France preserved information about noble gases in the ancient atmosphere.

Photo of a clam with close up images below.
Posted inEditors' Highlights

Ultra-High-Resolution Age Model in Clams Yields Daily Paleo-Data

by Branwen Williams 18 October 202317 October 2023

Using geochemical techniques, scientists identify daily cycles in fossilized giant clams, which permits climate reconstructions at the weather timescale.

A large forest fire burns on a mountainside.
Posted inNews

Natural Nitrogen Emissions Are Rising in California

by Nathaniel Scharping 13 October 202313 October 2023

Wildfires and soil microbes are releasing more nitrogen oxides in California as the climate gets warmer and drier.

Photo of the red Martian surface
Posted inNews

Ancient Mars May Have Had a Cyclical Climate

by Vijay Shankar Balakrishnan 29 September 202329 September 2023

Hexagonal structures in sediments are evidence of repeated wet and dry conditions on the Red Planet.

A silver wire mesh collects droplets of water in front of a gray background.
Posted inNews

Low-Tech, Energy-Free Tool Collects and Cleans Fog Water

Kimberly M. S. Cartier, News Writing and Production Intern for Eos.org by Kimberly M. S. Cartier 28 September 20237 February 2024

A new fog harvester could benefit communities that lack access to clean freshwater.

Posted inNews

Ароматы в ледяном керне рассказывают о жизнедеятельности человека

by Carolyn Wilke 20 September 202320 September 2023

В ледяном керне самой высокой горной вершины Европы содержатся источающие запах молекулы, свойства которых отражают экономические взлеты и падения Советского Союза.

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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

As Wildfires Increase in the West, So Does Suppression Spending

10 June 202610 June 2026
Editors' Highlights

Multi-Scale Fault Roughness Encapsulated in a Friction Law

11 June 202611 June 2026
Editors' Vox

Small-Scale Indian Ocean Dynamics Underpin Marine Ecology and Climate

4 June 20263 June 2026
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