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Category Archives: Seasons
Why does the rate for change of day length vary?
We define the length of the day as the time between sunrise and sunset, so that we can apply some simple mathematics.
Atmospheric conditions can make the actual sunrise and sunset vary slightly from the calculated times. As the Earth moves around the Sun, the length of the day changes. Continue reading
What is the status of the ozone hole?
Ozone occurs about 18 miles above the Earth’s surface and 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. Continue reading
When is the autumnal equinox?
This morning we officially entered fall as the autumnal equinox occurred at 2:50 a.m.
That means that today, in common with every location on Earth, we will enjoy exactly 12 hours of daylight and 12 hours of night. Continue reading
Do storms impact Arctic sea ice?
As we head into the second half of August the days are noticeably shorter. That change is even more dramatic in the polar regions where the summer ice melt season is nearing its end.
This year’s melt has been particularly dramatic, with the Arctic sea-ice extent likely heading to its lowest level since satellite measurements began in 1979. The previous low extent record was set in 2012. Continue reading
Has this been an unusually dreary spring?
With astrological summer set to begin on Friday morning at 10:54 a.m., it seems like a good time to consider the nature of this seemingly dreary and cold spring that we have just endured.
Almost no one will disagree that this year has had a memorably bad spring, not only locally but around the nation as widespread flooding has put elements of the agricultural sector well behind their normal schedules. Continue reading
