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Ozone Hole is Big, But Tempered by CFC Reductions
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Published November 13, 2018
The hole in the ozone layer over Antarctica was slightly above average size in 2018, but smaller than expected for the weather conditions.
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Pollutant Emissions Leveling Off a Bit in the U.S.
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Published May 30, 2018
Satellite data show that nitrogen oxide and carbon monoxide are not declining as much as projected by models.
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Measurements Show Reduction in Ozone-Eating Chemical
Published February 12, 2018
New research from NASA scientists shows that the amount of chlorine in the stratosphere over the South Pole is declining at the same time that ozone holes are becoming less severe.
Sulfur Dioxide Emissions Fall in China, Rise in India
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Published November 13, 2017
Pollution controls can work even as coal-usage continues.
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Satellite Tracks Ozone Pollution by Monitoring Its Key Ingredients
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Published November 6, 2017
Understanding the chemical precursors of ground-level ozone may make it easier to prevent the pollutant from building up in the lower atmosphere.
Ozone Hole is Smallest Since 1988
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Published November 2, 2017
The smaller ozone hole was strongly influenced by an unstable and warmer-than-usual Antarctic vortex.
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The Amazon Makes its Own Wet Season
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Published October 27, 2017
Satellite measurements of heavy isotopes in water vapor help solve a mystery of the rainforest.
The Ups and Downs of Sulfur Dioxide in North America
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Published May 26, 2017
Sulfur dioxide emissions have declined in the eastern United States and risen slightly in Mexico.
Russian Volcano Rumbles
Published March 28, 2017
For the first time in nearly 250 years, the Kambalny Volcano ejected ash.
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The Rise and Fall of SO2 Over Aruba
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Published March 22, 2017
Emissions maps tell the story of global oil markets.
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Satellite Catalogs Volcanic Sulfur Emissions
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Published March 10, 2017
Eruptions are dramatic, but continuous, low-level emissions of volcanic gas are an important input to the atmosphere.
Ozone Hole 2016, and a Historic Climate Agreement
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Published October 27, 2016
The same international agreement that successfully put the ozone layer on the road to recovery is now being used to address climate change.
Sulfur Dioxide Spreads Over Iraq
Published October 26, 2016
A fire at a sulfur mine and processing facility near Mosul has raised a noxious cloud of sulfur dioxide over much of northern Iraq.
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Satellite Finds Unreported Sources of Sulfur Dioxide
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Published June 7, 2016
Using NASA’s Aura satellite and some new analysis techniques, researchers found previously missing or under-reported sources of the pollutant.
Scientists Show Connection Between Gas Flaring and Arctic Pollution
Published April 27, 2016
Waste natural gas from industrial oil and gas fields could be a source of nitrogen dioxide and black carbon pollution, according to new research.
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A Decade of Change for Nitrogen Dioxide
Published January 28, 2016
During the past decade, the Aura spacecraft has observed increases in the air pollutant in some cities and decreases in others.
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Sulfur Dioxide Down over the United States
Published December 22, 2015
Levels of the air pollutant have dropped by about 80 percent over the eastern United States.
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