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biogeochemistry

An aerial photo of Alaska’s Copper River Delta
Posted inResearch Spotlights

Tectonics and Climate Are Shaping an Alaskan Ecosystem

by Nathaniel Scharping 16 October 202516 October 2025

Biogeochemical research reveals the web of forces acting on a high-latitude microbe community in the Copper River Delta.

An aerial photo of a research team standing on ice with a research vessel looming in the background.
Posted inNews

Ice Diatoms Glide at Record-Low Temperatures

Kimberly M. S. Cartier, News Writing and Production Intern for Eos.org by Kimberly M. S. Cartier 7 October 20257 October 2025

New observations reveal how microscopic organisms move through polar ice and illustrate how they may have evolved to thrive in extreme environments.

A researcher wearing waders stands ankle deep in muddy sediment, bending over to extract a water sample from the sediment using a plastic syringe.
Posted inScience Updates

Tracing Iron’s Invisible Transformations Just Beneath Our Feet

by Andrew R. C. Grigg, Katrin Schiedung, Joëlle Kubeneck and Ruben Kretzschmar 19 September 202519 September 2025

A new method that adds synthetic iron minerals to soils sheds light on hard-to-observe soil and sediment processes and may have a host of other applications in the Earth sciences and beyond.

The Perseverance Mars rover, a robot, pictured in front of a red landscape on Mars.
Posted inResearch & Developments

Perseverance Sample Shows Possible Evidence of Ancient Martian Microbial Metabolisms

by Grace van Deelen 10 September 202510 September 2025

A sample collected in July 2024 by NASA’s Perseverance Mars rover may be “the closest we’ve actually come to discovering ancient life on Mars,” according to Nicky Fox, the science head of NASA.

A cluster of small, shiny red objects is attached to the roots of a plant.
Posted inNews

Nitrogen Needs Could Be Limiting Nature’s Carbon Capacity

by Rebecca Owen 25 August 202525 September 2025

A new study suggests that past calculations of biological nitrogen fixation were overestimated by up to 66%—and that farms growing nitrogen-fixing crops may be filling in the gaps, for better or worse.

A large iceberg floats in blue Arctic Ocean water.
Posted inNews

Arctic Ice Shelf Theory Challenged by Ancient Algae

by Andrew Chapman 13 August 202513 August 2025

Chemical signatures of marine organisms reveal that seasonal sea ice, not a massive ice shelf, persisted in the southern Arctic Ocean for 750,000 years.

一个清澈的蓝色湖泊位于前景中广阔的干燥土地和背景中高耸的灰色山脉之间,山脉的底部覆盖着常绿的树木。
Posted inResearch Spotlights

地震如何改变湖泊微生物群落

by Rebecca Owen 6 August 20256 August 2025

提示:地震发生后,湖泊的地质、化学和生物成分会重新配置。一项新的研究深入探讨了地震变化对喜马拉雅地区措普湖的影响。

A clear blue lake lies between an expanse of dry dirt in the foreground and towering gray mountains whose lower reaches are covered in evergreen trees in the background.
Posted inResearch Spotlights

How Earthquakes Shake Up Microbial Lake Communities

by Rebecca Owen 24 July 20256 August 2025

After an earthquake, a lake’s geological, chemical, and biological components get reconfigured. A new study dives into the effects of seismic shifts on the Himalayas’ Lake Cuopu.

一条河流及后面可见的绿色河岸,山峦和一处灰色的建筑。
Posted inResearch Spotlights

追踪黑碳进入海洋的过程

Aaron Sidder, freelance science writer by Aaron Sidder 24 July 202524 July 2025

科学家们对三个河口进行研究,来寻找海洋溶解黑碳缺失的来源。

A green riverbank and a building are visible behind a river.
Posted inResearch Spotlights

Tracing Black Carbon’s Journey to the Ocean

Aaron Sidder, freelance science writer by Aaron Sidder 11 July 202524 July 2025

Scientists surveyed a trio of estuaries in pursuit of a missing source of oceanic dissolved black carbon.

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Features from AGU Publications

Research Spotlights

New Earthquake Model Goes Against the Grain

27 October 202527 October 2025
Editors' Highlights

New Evidence for a Wobbly Venus?

29 September 202525 September 2025
Editors' Vox

Publishing Participatory Science: The Community Science Exchange

20 October 202517 October 2025
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