Sunday, June 25, 2017
 
A sea change in the Arctic atmosphere

Thinning sea ice in spring affects ozone chemistry with implications for mercury contamination

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A sea change in the Arctic atmosphere

Arctic warming has thinned springtime sea ice across the Arctic Ocean. A new study shows that this alters the chemistry of the atmosphere near the Earth’s surface and may increase the amount of toxic mercury contaminating the region.

Accounting for Denver’s Ozone

First study to quantify effect of oil and gas emissions on ozone problem

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Accounting for Denver’s Ozone

The first peer-reviewed study to quantify oil and gas emissions on Colorado's northern Front Range confirms that energy development is an important contributor to the region’s chronic ozone problem. The NOAA-CIRES research was published August 8 in the Journal of Geophysical Research: Atmospheres

An East Side, West Side Story: Ozone Pollution in the United States

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An East Side, West Side Story: Ozone Pollution in the United States

In a new study, academic and NOAA scientists found that ozone pollution is declining at rural sites in the East, but is steady or even increasing at most sites in the rural West, with strongest increases in spring.

Annual Antarctic ozone hole larger and formed later in 2015

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Annual Antarctic ozone hole larger and formed later in 2015

The 2015 Antarctic ozone hole area was larger and formed later than in recent years, according to scientists from NOAA and NASA.

On Oct. 2, 2015, the ozone hole expanded to its peak of 28.2 million square kilometers (10.9 million square miles), an area larger than the continent of North America. Throughout October, the hole remained large and set many area daily records.

Antarctic ozone hole similar to last year

Ozone hole not as large as late 1990s, early 2000s

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Antarctic ozone hole similar to last year

The Antarctic ozone hole, which forms annually in the August to October period, reached its peak size on September 11, stretching to 9.3 million square miles (24.1 million square kilometers), roughly the same size as last year’s peak of 9.3 million square miles (24 million square kilometers) on September 16, 2013. This is an area similar in size to North America.

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