Montreal Protocol
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Montreal Protocol Is Delaying First Ice-Free Arctic Summer
New research from Columbia climate scientists shows that the 1987 ozone treaty, designed to protect the ozone layer, has postponed the occurrence of the first ice-free Arctic by as much as 15 years.
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Without the Montreal Protocol, More Intense Tropical Cyclones
Using one of the most advanced atmospheric computer models available, scientists compared our expected future with a scenario in which ozone-depleting substances had never been regulated.
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Ozone-Protection Treaty Had Climate Benefits, Too, Study Says
The global treaty that headed off destruction of earth’s protective ozone layer has also prevented major disruption of global rainfall patterns, according to a new study in the Journal of Climate. The 1987 Montreal Protocol phased out the use of chloroflourocarbons, or CFCs, a class of chemicals that destroy ozone in the stratosphere, allowing more…
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Two Climate Scientists Win 2012 Vetlesen Prize for Work on Ozone Hole, Ice Cores
An American atmospheric chemist who led efforts to identify the cause of the Antarctic ozone hole and a French geochemist who extracted the longest-yet climate record from polar ice cores have won the prestigious 2012 Vetlesen Prize. Susan Solomon and Jean Jouzel will share the $250,000 award, considered to be the earth sciences’ equivalent of…
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Study Links Ozone Hole to Weather Shifts
Depletion Said to Increase Rainfall in Subtropics
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Playing for the Planet
Scott Barrett, the Lenfest-Earth Institute Professor of Natural Resource Economics and an expert in complex international negotiations, teaches game theory in his Global Collective Action class. Using a simple card game, Barrett helps his students understand the consequences of decision making in complex negotiations, like those involved in climate treaties, where each country’s actions depend…
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Beyond Carbon: How Fixing the Ozone Layer Contributes to Climate Change
The greenhouse effect is not all about carbon dioxide. Several other substances, such as water vapor and methane, also play a key part in trapping radiation. Recently, a family of relatively obscure chemicals called hydrofluorocarbons, or HFCs, has entered the spotlight due to its role in global warming. HFCs are highly potent greenhouse warmers –…
