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Troposphere: composition and chemistry

Deciduous forests, like the one pictured here, are important sinks of ozone.
Posted inResearch Spotlights

Examining the Intricacies of Ozone Removal by Deciduous Forests

by Aaron Sidder 9 August 20215 October 2021

A new study looks into how air movement in the atmospheric boundary layer affects ozone removal by deciduous forests, which are a significant ozone sink.

Satellite image of the central California coast with wildfire smoke
Posted inNews

Golden State Blazes Contributed to Atmospheric Carbon Dioxide

by R. Crowell 27 September 2019

A new case study investigates causes and effects of California’s 2017 wildfire season.

Haze over eastern Pennsylvania
Posted inResearch Spotlights

A New Look at Winter Air Quality in the Northeastern U.S.

by E. Underwood 9 May 2019

Past studies underestimated a major pollution source, particularly in rural areas.

Posted inEditors' Highlights

The Long Reach of El Niño’s Broom

by J. A. Thornton 4 April 2018

Both the El Niño Southern Oscillation and natural variations in tropical Pacific weather conditions impact surface air quality in the Eastern United States.

Scientists trace the journey of radiocarbon through trees and soil to the atmosphere.
Posted inResearch Spotlights

Isotopes Track Carbon Cycle in Northern Wisconsin Wilderness

by A. Branscombe 9 November 2016

Researchers collected carbon from 3 years' worth of air samples and traced it back to its source.

Smog over Atlanta, Ga.
Posted inResearch Spotlights

No Evidence for Unknown Source of Ozone Precursor

by P. Kollipara 21 September 201621 September 2016

A study suggests that known combustion and photochemical sources of nitrous acid, a precursor to ground-level ozone, are enough to explain levels seen in the atmosphere.

Smog and Hong Kong’s skyline, seen from Victoria Peak.
Posted inResearch Spotlights

Chemical Boosts Ozone Production over Southern China

by Terri Cook 27 May 2016

The presence of nitryl chloride in polluted urban air can enhance the production of ozone by up to 41%, according to a new modeling study constrained by ground-based measurements.

Brandon Shores Generating Station
Posted inResearch Spotlights

Evaluating the Impact of Maryland's Healthy Air Act

by Terri Cook 12 May 201612 May 2016

Reducing emissions of short-lived gaseous sulfur pollutants from power plants had an immediate, local benefit, but controlling longer-lasting harmful particulate matter will require regional action.

Posted inResearch Spotlights

Detecting Black Carbon in the Arctic Atmosphere

by Sarah Stanley 17 February 201616 March 2017

Measurements of light-absorbing carbon particles made during an Arctic research expedition could improve understanding of their effects on the Arctic climate.

Posted inResearch Spotlights

Reduced Emissions Lead to Clearer Skies over Alabama

by S. Palus 20 February 201525 February 2015

Aerosol pollutants are on the decline—and so are their effects.

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Features from AGU Journals

RESEARCH SPOTLIGHTS
JGR: Solid Earth
“New Tectonic Plate Model Could Improve Earthquake Risk Assessment”
By Morgan Rehnberg

EDITORS' HIGHLIGHTS
AGU Advances
“Eminently Complex – Climate Science and the 2021 Nobel Prize”
By Ana Barros

EDITORS' VOX
Perspectives of Earth and Space Scientists
“New Directions for Perspectives of Earth and Space Scientists”
By Michael Wysession


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