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carbon cycle

U.S.-China cryosphere workshop participants
Posted inScience Updates

U.S. and China Assess Ecosystem Effects of a Fading Cryosphere

by A. L. Khan 13 February 201821 March 2022

Impacts of a Changing Cryosphere on Lakes and Streams in Mountain Regions: US-China Collaborative Workshop at Qinghai Lake; Qinghai, China, 21–27 August 2017

Posted inEditors' Highlights

Ocean Wind Satellites Observe an Amazonian Drought

by Ankur R. Desai 9 February 20186 March 2023

Satellites designed to observe ocean winds can also be used to map both forest structure and water content, allowing researchers to disentangle factors of carbon loss due to drought in the Amazon.

Posted inEditors' Highlights

What Will Redwood Trees Do Without Foggy Days?

by Ankur R. Desai 5 February 20187 February 2024

Coastal California fog—a key source of water for the iconic redwood tree—has declined by a third. Can a trace gas, carbonyl sulfide, be used to assess the effect on plant productivity?

Researchers explore how grazing animals impact their ecosystems—and the climate
Posted inResearch Spotlights

Critical Role of Grazing Animals in an Ecosystem

by S. Witman 30 January 201820 October 2021

Scientists model the effect of horses, cattle, sheep, and goats on local environments and global climate.

The TROCAS team studied what happens to organic matter as it travels along the Amazon River.
Posted inScience Updates

The Amazon River’s Ecosystem: Where Land Meets the Sea

by N. D. Ward, H. O. Sawakuchi and J. E. Richey 18 January 201831 March 2023

What happens to plant matter on its journey down the Amazon River to the Atlantic Ocean? One research group investigated the region where river and ocean meet to fill in this part of the story.

Researchers examine how mossy oaks filter carbon when it rains.
Posted inResearch Spotlights

Mossy Oaks Are Dripping with Organic Matter

by E. Underwood 27 December 201726 March 2024

Epiphyte-bearing trees leach carbon when it rains.

Researchers spot the culprit behind methane emissions from mountainous upland forests
Posted inResearch Spotlights

Why Mountainous Upland Forests Emit So Much Methane

by E. Underwood 22 December 20172 November 2021

New research suggests that moist tree heartwood produces methane and emits the greenhouse gas to the atmosphere.

Trees poke through snow at the edge of a boreal forest
Posted inNews

Eyes in the Sky Look Closer at Under-Surveyed Northern Forests

by N. Lanese 14 December 20176 March 2023

Spaceborne images give scientists a detailed picture of the boreal forests’ tree heights, which help scientists estimate their contribution to carbon budgets. 

Researchers spot microbial respiration in the dry valleys of Antarctica
Posted inResearch Spotlights

Searching for Organic Carbon in the Dry Valleys of Antarctica

by E. Underwood 6 December 20179 February 2023

Researchers identify the first evidence of microbial respiration in desiccated Antarctic permafrost soils.

Ubsunur Hollow Biosphere Reserve, one of the last remnants of the mammoth steppe.
Posted inScience Updates

Ocean Circulation, Carbon Cycling During the Last Deglaciation

by S. Azharuddin 1 December 20178 June 2022

Past Global Changes (PAGES) OC3 Working Group second workshop on Ocean Circulation and Carbon Cycling during Last Deglaciation: Regional Synthesis of Carbon Isotopes Data; Corvallis, Oregon, 27–29 June 2017

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Features from AGU Publications

Research Spotlights

Tiny Cyanobacteria May Be the Secret Heroes of Ocean Carbon Sequestration

10 September 202610 September 2026
Editors' Highlights

Waves Play a Key Role for Lateral Stirring and Mixing of Ocean Tracers

11 September 202611 September 2026
Editors' Vox

How Can We Make Better Decisions About What Lies Underground?

10 September 202610 September 2026
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