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Low temperatures in the northern polar regions led to an unusual stable polar vortex, and the presence of ozone-destroying chemicals such as chlorine and bromine in the atmosphere – from human activities – caused the hole to form.
“The hole is principally a geophysical curiosity,” said Vincent-Henri Peuch, director of the Copernicus Atmosphere Monitoring Service. “We monitored unusual dynamic conditions, which drive the process of chemical depletion of ozone. [Those dynamics] allowed for lower temperatures and a more stable vortex than usual over the Arctic, which then triggered the formation of polar stratospheric clouds and the catalytic destruction of ozone.”
The hole is not related to the Covid-19 shutdowns that have drastically cut air pollution and reduced greenhouse gas emissions. It is also too early to say whether the unusually stable Arctic polar vortex conditions are linked with the climate crisis, or part of normal stratospheric weather variability.
There is no danger to humans at this point. If the hole moves south where there are populated areas it could cause sunburn.[/qoute]
OR looking positively extra Ultra-Violet to kill airborne and exterior surface dwelling virus. Sterilize the earth whilst we are all indoors.
Record-size hole opens in ozone layer above the Arctic
An ozone hole that formed over the Arctic this spring and eventually grew into the largest ever recorded there has closed.
Scientists who were tracking the hole at Copernicus' Atmospheric Monitoring Service (CAMS) made the announcement late last week, noting the "rather unusual" hole was caused not by human activity but a particularly strong Arctic polar vortex, CAMS said.