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geochemistry

A gloved hand holding an ice core
Posted inNews

How Ice Cores Are Helping to Track Preindustrial Ozone

Rachel Crowell, Science Writer by Rachel Crowell 29 July 20193 April 2023

Research helps allay concerns about discrepancies between atmospheric chemistry models and historical direct measurements.

Photograph of biogeochemist Jordon Hemingway collecting a sediment sample from the Thjórsá River in southern Iceland
Posted inNews

The Jail That Keeps Oxygen in the Air

Lucas Joel by L. Joel 25 July 201922 February 2022

Oxygen shouldn’t be in the air we breathe. But it is, and the reason why is almost criminal.

An illustration showing microscopic colloidal particles adhered to sand grains in an aquifer from which groundwater is being pumped to the surface via a well.
Posted inResearch Spotlights

Treating Colloids as Clusters Better Predicts Their Behavior

by Terri Cook 25 July 20196 February 2023

New research suggests that an accurate prediction of colloidal particle mobilization in the environment should account for the effect of clustering.

Posted inNews

Alexander R. “Mac” McBirney (1924–2019)

by D. Johnston, D. Geist, T. Morse and R. S. J. Sparks 24 July 201910 October 2021

This former West Point graduate and coffee grower transformed igneous petrology and volcanology.

A small rowboat sits on the edge of Lake Sinclair, one of five lakes in north central New Brunswick surveyed for the new study on DDT contamination.
Posted inNews

The Toxic Legacy of DDT Lives On in Remote Canadian Lakes

Mary Caperton Morton, Science Writer by Mary Caperton Morton 23 July 20199 May 2022

DDT and its breakdown products permeate lake sediments decades after the pesticide was banned.

National Guard rescue man in boat on flooded street
Posted inOpinions

Uncontrolled Chemical Releases: A Silent, Growing Threat

by K. R. Miner 17 July 201927 October 2022

Uncontrolled releases of household, industrial, and agricultural chemicals during natural disasters pose an underappreciated hazard to humans and ecosystems. Here’s what we can do.

Exoplanet near a star
Posted inNews

Chemical Patterns May Predict Stars That Host Giant Planets

Kimberly M. S. Cartier, News Writing and Production Intern for Eos.org by Kimberly M. S. Cartier 25 June 20197 March 2022

Stars with giant planets tend to have a few key elements in abundance. A new algorithm used these patterns to predict hundreds of stars that will likely have exoplanets if we go looking for them.

Man collects water from a pipe to put in a test tube.
Posted inNews

Ancient Water Underlies Arid Egypt

Mary Caperton Morton, Science Writer by Mary Caperton Morton 18 June 20196 February 2023

A hidden trove of groundwater is left over from the last ice age.

Underwater photo of bleached staghorn coral
Posted inResearch Spotlights

The Effect of Coral Bleaching Events in the Great Barrier Reef

by David Shultz 31 May 201923 February 2023

A new study using seawater chemistry compares the status of the iconic reef before and after a bleaching event.

X-ray tomography images of experimental magmas captured at different crystal contents
Posted inEditors' Highlights

Crystals Connect Bubbles in Explosive Magmas

by S. D. Jacobsen 28 May 20195 October 2022

Hydrous silica-rich magmas can degas through connected bubble pathways when as little as 20% crystals are present, influencing transitions from explosive, Vulcanian-style eruptions to lava effusion.

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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

How Water Flows Toward Cities During Hurricanes

30 July 202630 July 2026
Editors' Highlights

A New Pathway for Energy Redistribution in Near-Earth Space

30 July 202629 July 2026
Editors' Vox

The Hidden Costs of Mining River Sand

27 July 202627 July 2026
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