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Another Lively Season of Night-Shining Clouds
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Published July 8, 2020
Extremely cold and wet conditions in the mesosphere have led to abundant noctilucent clouds.
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Nitrogen Dioxide Levels Rebound in China
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Published May 22, 2020
With most lockdowns ending and economic activity resuming, levels of the air pollutant have returned to near normal for this time of year.
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Unusual Weather Leads to Ozone Low Over the Arctic
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Published April 16, 2020
While such low concentrations of ozone are unusual, they are not unprecedented.
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Australian Smoke Plume Sets Records
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Published January 31, 2020
Potent wildfires sent one of the largest plumes of smoke higher into the stratosphere than certain satellites have ever observed.
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2019 Ozone Hole is the Smallest on Record
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Published October 17, 2019
Abnormal weather patterns in the upper atmosphere over Antarctica dramatically limited ozone depletion.
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New Map Shows Risk of Sunburn Across the U.S.
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Published August 6, 2019
The Centers for Disease Control and Prevention is using NASA data to help the public better understand their UV exposure.
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Ozone Hole is Big, But Tempered by CFC Reductions
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.
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.