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The emissions of a banned ozone-depleting gas have dropped rapidly following a previously unexpected spike. A team of international researchers analysed global air measurements of the ozone-depleting chemical chlorofluorocarbon CFC-11. The analysis involved the use of detailed atmospheric models to remove the effects of natural meteorological variations. They found that five years after an unexpected...
Rising nitrous oxide emissions are jeopardizing climate goals and the Paris Accord, according to a new international study, which included results from TOMCAT (INVICAT) inversions. The growing use of nitrogen fertilizers in the production of food worldwide is increasing concentrations of nitrous oxide in the atmosphere—a greenhouse gas 300 times more potent than carbon dioxide—which...
Martyn Chipperfield writes for The Conversation on how the 30-year-old ozone layer treaty Montreal Protocol is so successful it is now taking on Climate Change. The 1987 treaty that stopped the pollution causing a hole in the ozone layer is rightly seen as a major success story. It’s arguably the most successful international environmental agreement...