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nitrogen

Flat green land with small ponds
Posted inNews

The Bering Land Bridge Formed Much Later Than Previously Thought

by Clara Chaisson 28 February 202328 February 2023

New research reconstructs the Bering Strait’s flooding history, raising surprising questions about human migration and how ice sheets form.

Tropical trees and ferns growing on a sloped landscape
Posted inResearch Spotlights

How Much Greenhouse Gas Do Tropical Soils Emit?

by Sarah Derouin 30 January 202321 February 2023

New research found that tropical soils emit nitrogen mostly as inert dinitrogen rather than as greenhouse gases.

Map of the Yukon-Kuskokwim Delta in Alaska
Posted inEditors' Highlights

The Burning Tundra

by Marguerite A. Xenopoulos 4 October 202219 January 2023

As wildfires blaze through the Arctic, scientists examine the role of landscape characteristics on wildfire ecosystem responses in northern aquatic ecosystems.

Flooding during June 2011 on the Missouri River floodplain near Arrow Rock, Mo.
Posted inResearch Spotlights

Missouri River Floodplain Expansion, Services, and Resiliency

by Aaron Sidder 28 July 202221 September 2022

Benefits might accrue for both wildlife and climate resiliency if more floodplains along the lower Missouri River were allowed to flood.

Photos of clouds, forest and sea.
Posted inEditors' Vox

Inventorying Earth’s Land and Ocean Greenhouse Gases

by Benjamin Poulter, Ana Bastos, Josep G. Canadell, Philippe Ciais, Nicolas Gruber, Judith Hauck, Robert B. Jackson, Masao Ishii, Jens Daniel Müller, Prabir K. Patra and Hanqin Tian 17 February 20225 December 2022

A new special collection in AGU journals will present findings from the Second REgional Carbon Cycle Assessment and Processes (RECCAP2) study with a decade of data on greenhouse gas growth.

Field of dead and burned trees in the San Bernardino National Forest. Researcher Fabiola Pulido-Chavez stands among them with her back turned toward the camera.
Posted inNews

Wildfires May Alter the Nitrogen Cycle—and Air Pollution

by Krystal Vasquez 16 December 20217 July 2022

Research indicates that wildfires could be bolstering soil emissions of air pollutants that contribute to smog and climate change.

A grassy landscape next to a river and the ocean.
Posted inNews

A Global Map of Human Sewage in Coastal Ecosystems

by Katherine Kornei 3 December 202128 March 2022

Prodigious quantities of nitrogen from human waste flow into coastal waters, a study of nearly 135,000 watersheds reveals.

Posted inEditors' Highlights

What Controls Nitrous Oxide Emissions from Rivers?

by Nicolas Gruber 22 November 202128 March 2022

Statistical and numerical models show that denitrification efficiency is a key parameter controlling the production of N2O from rivers, providing a target for river restoration projects.

Lake Cadagno—an alpine lake in Switzerland with calm blue-green waters surrounded by sharp-peaked mountains
Posted inNews

Purple Bacteria Fix Nitrogen in Proterozoic-Analogue Lake

by Elise Cutts 28 September 202117 February 2023

A new study challenges the assumption that cyanobacteria were the only major nitrogen fixers in the Proterozoic eon.

路边的沟渠可以在水进入水道之前有效地将水中的氮去除。图片来源: Corianne Tatariw
Posted inResearch Spotlights

路边沟渠可有效脱氮

by Sarah Derouin 7 September 202121 March 2022

研究人员比较了那些为森林、城市和农业用地排水的沟渠中微生物的脱氮潜力,发现路边沟渠是去除养分的重要区域。

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