In a couple of weeks’ time humanity can celebrate the 25-year anniversary of the Montreal Protocol, our greatest environmental success story. In the margins of this good news there are however also a few new ozone concerns. Climate change may … Continue reading
But let’s stick to the Montreal spirit and call it a challenge instead of a problem.
In April the WMO announced the Arctic ozone hole had reached record proportions – perhaps even doubling the previous depletion record of 2005, a Nature publication recently added. On the southern hemisphere the story seems much the same. New data … Continue reading
Both supernovae and extreme solar flares can damage Earth’s ozone layer. But perhaps a black hole swallowing a neutron star somewhere not too far away gives a bigger punch – lasting a second or so.
The Antarctic ozone hole was big news in the eighties. It was a clear sign of man’s detrimental influence on our planet. Now the ozone layer over the Arctic is so thin that for the first time it can be … Continue reading
The WMO today reports rapid and record-breaking thinning of the ozone layer over the Arctic region over the course of this winter and early spring – with now 40 percent of it gone. Unusually low temperatures in the stratosphere, even … Continue reading
Good news in Science from an international team of atmospheric chemists, including researchers from NOAA and the Dutch universities of Wageningen and Utrecht. Hydroxyl, atmosphere’s enthusiastic cleaning agent, proves to be produced in quite stable quantities from year to year.
Chlorofluorocarbons are up to 11,000 times as potent as greenhouse gases as CO2. The Montreal Protocol locked away some 4 years of regular CO2 emissions. And if we try really hard – and look for every old fridge on the … Continue reading