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Why does fog form over the lake?
The recent cold weather was accompanied by interesting fog over the open water of our lakes.
Fog is essentially a ground-hugging cloud, composed of tiny liquid water droplets. Continue reading
What is a polar vortex
The term “polar vortex” was popularized by media outlets in 2014, when the country experienced a brutal January cold snap.
The polar vortex is a band of strong winds, high up in the atmosphere that spins counter-clockwise around the North Pole. Continue reading
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
Why should we be concerned about the Arctic climate?
Changes in the Arctic have global implications. The global average temperature is warming but the air temperatures in the Arctic are increasing twice as fast or possibly faster.
The year 2019 will go down as the second-lowest minimum extent of sea ice. Sea ice is bright and reflects about 80% of the sunlight that falls on it, helping to keep the surface cold. 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
