In July 2015, U.S. Environmental Protection Agency head Gina McCarthy was being grilled by lawmakers over President Obama's Clean Power Plan requiring states to limit carbon emissions, when she was asked, "What percentage ...
Earth Sciences
Aug 12, 2019
3
46
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 03, 2019
0
0
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 07, 2019
2
22
Analysis of iodine trapped in Alpine ice has shown that levels of atmospheric iodine have tripled over the past century, which partially offsets human-driven increases in the air pollutant, ozone.
Environment
Nov 12, 2018
0
120
Early Earth was a hot, gaseous, dusty and dynamic planet with an atmosphere and an ocean. Then its surface cooled and stabilized enough for clouds, landmasses and early life to form about four billion years ago, during what's ...
Earth Sciences
Aug 07, 2018
0
210
Global levels of ethane and propane in the atmosphere have been underestimated by more than 50%, new research involving scientists at the University of York has revealed.
Environment
Feb 26, 2018
9
170
On Jan. 31, NASA ended the Tropospheric Emission Spectrometer's (TES) almost 14-year career of discovery. Launched in 2004 on NASA's Aura spacecraft, TES was the first instrument designed to monitor ozone in the lowest layers ...
Space Exploration
Feb 14, 2018
0
22
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
0
96
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
0
6
"Ozone depletion is a well-known phenomenon and, thanks to the success of the Montreal Protocol, is widely perceived as a problem solved," says University of East Anglia's David Oram. But an international team of researchers, ...
Earth Sciences
Oct 12, 2017
1
153
