Arctic ozone without the Montreal Protocol (left) and following its implementation (right) on 26 March 2011. Credit: Sandip Dhomse

Claim: ‘Severe ozone depletion avoided ‘

From the University of Leeds We are already reaping the rewards of the Montreal Protocol, with the ozone layer in much better shape than it would have been without the UN treaty, according to a new study in Nature Communications. Study lead author Professor Martyn Chipperfield, from the School of Earth & Environment at the…

ESA_ozone_3-2011

New research highlights the key role of ozone in climate change

From the University of Cambridge Many of the complex computer models which are used to predict climate change could be missing an important ozone ‘feedback’ factor in their calculations of future global warming, according to new research led by the University of Cambridge and published today (1 December) in the journal Nature Climate Change. Computer…

ozone_11sept2014[1]

2014 Antarctic Ozone Hole Holds Steady

From NASA: The Antarctic ozone hole reached its annual peak size on Sept. 11, according to scientists from NASA and the National Oceanic and Atmospheric Administration (NOAA). The size of this year’s hole was 24.1 million square kilometers (9.3 million square miles) — an area roughly the size of North America. This image shows ozone…

Ooops – According to NASA, ozone destroying CCl4 remains in atmosphere, and continues to be emitted

NASA research shows Earth’s atmosphere contains an unexpectedly large amount of an ozone-depleting compound from an unknown source decades after the compound was banned worldwide. Carbon tetrachloride (CCl4), which was once used in applications such as dry cleaning and as a fire-extinguishing agent, was regulated in 1987 under the Montreal Protocol along with other chlorofluorocarbons…