Get the Answer of: Do Ozone Holes Form Over the Arctic? (a) The stratospheric temperatures are seldom below—80°C due to frequent exchange of air masses with the mid-latitudes; (b) The Arctic air vortex usually dissipates in late winter before sunlight returns to initiate the ozone destruction. The differences between the two regions result in part from the larger land mass [...]
Get the answer of: What is Montreal Protocol? In 1985 an international agreement, the Vienna Convention, was signed after three years of negotiating under the auspices of the United Nations Environment Programme. The Vienna Convention established mechanisms for international cooperation in research, monitoring, and exchange of data on emissions, on concentrations of CFCs and halons, and on the status of [...]
Get the Answer of: Why is the Ozone Hole over Antarctic? Observed ozone over the British Antarctic Survey station at Halley Bay first revealed obvious decreases in the early 1980s compared to data obtained since 1957. The ozone hole is formed each year when there is a sharp decline (currently up to 60%) in the total ozone over most of [...]