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biogeochemistry

Close-up of a partially surfaced humpback whale showing its baleen
Posted inNews

A Great Whale Conveyor Belt Transports Nutrients Across Oceans

Adityarup Chakravorty, freelance science writer by Adityarup Chakravorty 5 May 20255 May 2025

Baleen whales shift huge amounts of nutrients, including nitrogen, from high-latitude feeding waters to tropical breeding areas.

Satellite view of swirling blooms of green algae and cyanobacteria in the Baltic Sea near the Swedish island of Gotland
Posted inFeatures

Could Bubbling Oxygen Revitalize Dying Coastal Seas?

by Caroline P. Slomp and Andreas Oschlies 1 May 20257 May 2025

Reoxygenation approaches have shown some success in lakes, but their potential risks must be examined carefully before they’re implemented as solutions to improve the health of coastal waters.

A pile of dried tea leaves lies on a wooden table next to a cup of brewing tea.
Posted inNews

Tea Leaves Remove Lead from Water

by Skyler Ware 10 April 202510 April 2025

Surface and chemical properties of tea leaves may help explain the correlation between tea consumption and lower incidences of heart disease, high blood pressure, and stroke.

The gray surface of Enceladus with plumes of gas escaping from the surface into space
Posted inResearch Spotlights

Using Algorithms to Help Find Life on Icy Ocean Worlds

by Saima May Sidik 21 March 202521 March 2025

Scientists could use machine learning to analyze atmospheric samples in order to help identify microbes on frozen moons. They’re testing the concept using bottles of brine and smelly bacteria.

Photo of a river
Posted inEditors' Highlights

Carbon-Nutrient Ratios Drive Nitrate Removal in Mediterranean Streams

by Kyle Boodoo and Suzanne Tank 19 March 202519 March 2025

The type of organic matter, and ratio of nutrients to carbon, impact the ability of heterotrophic bacteria to effectively remove certain forms of nitrogen pollution (nitrate) from streams.

Diagram
Posted inEditors' Highlights

Coastal Dynamics Revealed by Satellite Salinity Data

by Yuanlong Li 11 February 20257 February 2025

One decade of high-quality satellite salinity observations provide valuable insights into the complex dynamics in the Mid-Atlantic Bight.

Map from the article.
Posted inEditors' Highlights

Filling the Gaps: Context and Design of Arctic Carbon Flux Measurement Networks

by Patrick Crill 24 January 202524 January 2025

Large scale observational networks are necessary for understanding the impact of a warming climate in the Arctic, but critical tools are crucial to how those networks are designed.

Four graphs from the study.
Posted inEditors' Highlights

How Southern Ocean Currents Modulate Global Biogeochemical Cycles

by Susan Trumbore 14 January 202514 January 2025

Swirling currents called mesoscale eddies occupy about 22% of the ice-free Southern Ocean. Using data from drifting floats and satellites, scientists report the impact these eddies have on biogeochemical cycles.

A black smoker, shaped like a stone cylinder on the ocean floor, spews black smoke into the water.
Posted inNews

Arctic Hydrothermal Vents May Resemble Those on Enceladus

by Anna FitzGerald Guth 17 December 202417 December 2024

By studying hydrogen-rich vent sites on Earth, scientists could learn more about the hidden ocean of Saturn’s icy moon—one of our solar system’s likeliest candidates for harboring life beyond Earth.

In this artist’s rendition, a satellite consisting of two umbrella-shaped instruments and two solar panels is seen in the foreground. In the background, a crescent of Earth is shown in the blackness of space.
Posted inNews

Next NASA Field Campaign Could Fund Projects in Drylands or Tropics

by Saima May Sidik 1 November 20241 November 2024

Scientific feedback can improve proposals and signal support for large-scale, intensive climate research.

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Features from AGU Publications

Research Spotlights

Heat and Pollution Events Are Deadly, Especially in the Global South

14 May 202514 May 2025
Editors' Highlights

Resilient Solutions Involve Input and Data from the Community

14 May 202514 May 2025
Editors' Vox

Decoding Crop Evapotranspiration

6 May 20256 May 2025
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