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Category Archives: Seasons
What is the status of the ozone hole?
Ozone occurs about 18 miles above the Earth’s surface.
Ozone is both caused by and provides protection from damaging ultraviolet energy emitted by the sun. The development of an atmospheric “ozone layer” allowed life to move out of the oceans and onto land.
The amount of ozone in the atmosphere is routinely measured from satellites. Typically, the Antarctic ozone hole has its largest area in early September and lowest values in late September to early October. This year it was measured to be one of the largest and deepest in recent years, covering just over 9 million square miles. Continue reading
Do the Rocky Mountains influence our weather?
Our string of beautiful days at the end of last week were related, believe it or not, to the presence of the Rocky Mountains hundreds of miles to our west. Last week, the atmospheric flow at levels just above the … Continue reading
Why are cold snaps in autumn so short-lived?
Over the past weekend southern Wisconsin experienced its first cold snap of the season with widespread morning lows in the lower 30s on Friday and Sunday mornings.
Very often cold snaps in the autumn are very short-lived as this recent example was, affecting usually one or two nights at most. Continue reading
How does weather affect fall colors?
Astronomical fall began on Sept. 22.
Climatologists consider fall as the months of September, October and November. The fall season is also associated with pumpkin patches, fresh apples and beautiful foliage. Continue reading
Are we seeing evidence of climate change?
Last week was an alarming week in weather and climate news.
Hurricane Sally bore down on the Gulf Coast with fury and flooding, while four other tropical storms churned away simultaneously in the Atlantic. This is only the second time ever, and first since 1971, when such prolific tropical storminess has characterized the Atlantic basin. Continue reading
