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geochemistry

Árboles con hojas verdes y otoñales en el bosque de Odem. Debajo de los árboles hay pasto ver cubierto parcialmente por hojas caídas ocre.
Posted inResearch Spotlights

Mediciones pareadas de gases: ¿un nuevo trazador biogeoquímico?

by Terri Cook 18 May 202218 May 2022

Una técnica que mide la relación entre el dióxido de carbono producido y el oxígeno consumido podría mejorar las predicciones de la respuesta del suelo al cambio climático.

Image of a thin section of peridotite, taken under a microscope, with the pinks, greens, purples, and blues of olivine crystals of various sizes mixed with other, less brightly colored minerals
Posted inNews

Million or Billion? Narrowing Down the Age of Mantle Processes in New Guinea

by Alka Tripathy-Lang 16 May 202220 June 2024

Mantle rocks in Papua New Guinea contain curious geochemical signatures that scientists have traditionally interpreted as evidence of billions-year-old melting. New evidence suggests otherwise.

A view of a swamp on Rishiri Island, with trees and water in the foreground and a snowy mountain in the background
Posted inResearch Spotlights

Climate and Currents Shaped Japan’s Hunter-Gatherer Cultures

by Rebecca Dzombak 5 May 2022

New climate records from a peat bog show how two neighboring cultures responded differently to shifts in climate and ocean currents.

A diver in scuba gear holds a coring device to collect a sample from a coral head on the seafloor in clear, light blue water.
Posted inScience Updates

Clues from the Sea Paint a Picture of Earth’s Water Cycle

by Kristine DeLong, Alyssa Atwood, Andrea Moore and Sara Sanchez 4 May 202225 January 2023

New instrumentation and growing modeling needs in the Earth sciences are driving a renewed effort to compile and curate seawater oxygen isotope data in a centralized, accessible database.

An artist’s impression of planet formation: Close to the star, dust particles grow into planetesimals and Earth-like planets. Farther away, gas accretes on planetary cores to create Jupiter-like giants.
Posted inNews

Krypton Isotopes Provide New Clues to Planets’ Pasts

by Carolyn Wilke 4 May 202217 March 2023

To trace how crucial ingredients for life arrived at Earth, scientists track noble gases. Now, improved methods are drawing new clues from krypton, the most cryptic of noble gases.

A red rock tower in front of a backdrop of cloudy sky
Posted inFeatures

Is Earth’s Core Rusting?

by Jiuhua Chen and Shanece S. Esdaille 25 April 20223 January 2023

If subduction carries hydrous minerals deep into Earth’s mantle, they may “rust” the iron outer core, forming vast sinks of oxygen that can later be returned to the atmosphere.

Deciduous trees in the Odem Forest
Posted inResearch Spotlights

Paired Gas Measurements: A New Biogeochemical Tracer?

by Terri Cook 21 April 202228 July 2022

A technique that measures the ratio of carbon dioxide produced to oxygen consumed could improve predictions of soil’s response to climate change.

A large hot spring bubbles and steams in the mountains of the Tibetan Plateau.
Posted inNews

Hot Springs Suggest How the Tibetan Plateau Became the Roof of the World

by Saima May Sidik 20 April 202223 February 2023

Helium isotopes found in water samples provide a snapshot of what lies beneath the plateau and stimulate debate within the geosciences community.

A volcanic eruption spews molten rock into the sky.
Posted inNews

Magma Lingers at Different Depths on the Basis of Its Water Content

Katherine Kornei, Science Writer by Katherine Kornei 4 April 202225 April 2022

The discovery, gleaned from observations of volcanoes on four continents, could help constrain models of volcanic eruptions.

In the humid highlands of San Cristóbal Island, researchers take soil samples from a pit.
Posted inNews

The Galápagos Islands: The Ultimate Outdoor Soil Science Laboratory

by DJ McCauley 28 March 202228 March 2022

A new study has spurred further research into the impacts of soil formation on modern-day problems like heavy metal contamination in agricultural soils.

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Features from AGU Publications

Research Spotlights

Coherent, Not Chaotic, Migration in the Brahmaputra-Jamuna River

2 July 20252 July 2025
Editors' Highlights

Deep Root Respiration Helps Break Down Rocks

2 July 20252 July 2025
Editors' Vox

Water Tracks: The Veins of Thawing Landscapes

25 June 202525 June 2025
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