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biogeochemistry

Satellite photo of a brown and gray landscape with hills and bumps
Posted inNews

We (Probably) Can’t Tell Whether Mars Has Life

by Matthew R. Francis 10 March 202310 March 2023

State-of-the-art equipment can’t always identify life inhabiting the most Mars-like spot on Earth, leaving scientists wondering how to do better on the Red Planet.

一个穿着潜水衣的人涉水穿过水下的樽海鞘群。
Posted inResearch Spotlights

喷气推进的被囊动物在海洋碳循环中的作用

Aaron Sidder, freelance science writer by Aaron Sidder 17 February 202322 February 2023

新研究表明,广泛分布的胶质浮游动物的大量繁殖,连同它们的粪便、每日的垂直迁移和它们的尸体一起,增加了海洋的碳输出。

A person in a wetsuit wades through an underwater cloud of salps.
Posted inResearch Spotlights

Jet-Propelled Tunicates Pump Carbon Through the Oceans

Aaron Sidder, freelance science writer by Aaron Sidder 19 January 202317 February 2023

New research reveals that blooms of the widespread gelatinous zooplankton—along with their feces, daily vertical migrations, and carcasses—increase marine carbon export.

Posted inEditors' Highlights

Roadside Plants Witness COVID Traffic

Eric Davidson, president-elect of AGU by Eric Davidson 7 January 20237 January 2023

Radiocarbon in roadside plants revealed a decline in auto emissions during COVID lockdown and a 2021 rebound. Could this improve emission estimates in countries without CO2 monitoring infrastructure?

Figure 1 from the paper, showing a schematic of key processes controlling coastal carbon dynamics.
Posted inEditors' Highlights

Substantial Advance Towards a Global Coastal Carbon Model

by Andreas Oschlies 27 September 202220 October 2022

First simulations of a new biogeochemistry-circulation coastal grid refinement demonstrate seamless inclusion of small-scale coastal processes in a state-of-the-art Earth system model.

An image of fish and bubbles in the ocean
Posted inResearch Spotlights

Short-Term Events Can Shrink the Habitable Zone in Oceans

Sarah Derouin, Science Writer by Sarah Derouin 12 August 202212 August 2022

A new study looks at habitat reduction during low-oxygen events, spurring the question, Could short-term events provide a window into the long-term health of oceans?

Northern California’s Eel River watershed
Posted inResearch Spotlights

Small Catchments Sustain Silicon Signatures Following Storms

by Jack Lee 10 June 202229 June 2022

Watersheds have unique patterns of silicon export due to differences in subsurface water routing and biogeochemical reactions.

Satellite image of the Mississippi River near Memphis, Tenn., with a false-color overlay
Posted inScience Updates

A Sharper Look at the World’s Rivers and Catchments

by Bernhard Lehner, Achim Roth, Martin Huber, Mira Anand and Michele Thieme 12 April 202210 March 2023

Digital hydrographic maps have transformed global environmental studies and resource management. A major database update will provide even clearer and more complete views of Earth’s waterways.

Photo of the Makahiku Falls in the Haleakala National Park Maui, Hawaii
Posted inEditors' Vox

Evaluating the Impact and Reach of Biogeochemical Cycles

by K. Dontsova, Z. Balogh‐Brunstad and G. Le Roux 20 September 20211 October 2021

A new book examines flow of the elements in the biosphere from biological drivers to human influences, and explores the analytical and computational methods used to access biogeochemical cycles.

Illustration of a lightning storm over volcanic land on early Earth
Posted inNews

Cloud-to-Ground Lightning May Have Struck a Key Ingredient for Life

by Jackie Rocheleau 30 April 202129 September 2021

On early Earth, rock created by lightning strikes to the ground likely held a form of phosphorus necessary for prebiotic chemistry.

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Features from AGU Publications

Research Spotlights

An Ecosystem Never Forgets

19 December 202519 December 2025
Editors' Highlights

Frictional Properties of the Nankai Accretionary Prism

11 December 20259 December 2025
Editors' Vox

Hydrothermal Circulation and Its Impact on the Earth System

3 December 20253 December 2025
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