Ozone levels above the Arctic reached a record low for March, NASA researchers report. An analysis of satellite observations show that ozone levels reached their lowest point on March 12 at 205 Dobson units.
Environment
Apr 16, 2020
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Chemicals that deplete Earth's protective ozone layer have also been triggering changes in Southern Hemisphere atmospheric circulation. Now, new research in Nature finds that those changes have paused and might even be reversing ...
Earth Sciences
Mar 25, 2020
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Starting in 536 A.D., the sky went dark for more than a year. In some parts of Europe and Asia, the sun only shone for about four hours a day, and "accounts say the sun gave no more light than the moon," says Dallas Abbott, ...
Earth Sciences
Dec 18, 2019
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Cloud watchers have recently been given record-breaking glimpses of the rarest clouds in the skies. Stunning rippled blue clouds have been forming in the highest reaches of the atmosphere over Europe and the U.S.. These clouds ...
Earth Sciences
Jul 3, 2019
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This week brought news that atmospheric carbon dioxide (CO₂) levels at the Mauna Loa atmospheric observatory in Hawaii have risen steeply for the seventh year in a row, reaching a May 2019 average of 414.7 parts per million ...
Environment
Jun 7, 2019
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Permafrost underlies nearly 85 percent of Alaska and nearly a quarter of the landmass in the northern hemisphere. This perennially frozen soil contains twice as much carbon as is found in the Earth's atmosphere. Since the ...
Earth Sciences
Feb 1, 2019
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Rising 2,225 meters into the air on an island in the Azores archipelago, Pico Mountain Observatory is an ideal place to study aerosols—particles or liquids suspended in gases—that have traveled great distances in the ...
Earth Sciences
Oct 2, 2018
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Army researchers have designed a computer model that more effectively calculates the behavior of atmospheric turbulence in complex environments, including cities, forests, deserts and mountainous regions.
General Physics
Aug 7, 2018
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Each year, ozone-depleting compounds in the upper atmosphere destroy the protective ozone layer, and in particular above Antarctica. The ozone layer acts as Earth's sunscreen by absorbing harmful ultraviolet radiation from ...
Environment
Dec 14, 2017
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High in the atmosphere, above weather systems, is a layer of ozone gas. Ozone is Earth's natural sunscreen, absorbing the sun's most harmful ultraviolet radiation and protecting living things below. But ozone is vulnerable ...
Earth Sciences
Nov 22, 2017
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