Are summers warmer?
Yes - especially at night.
At the Columbia Icefields, day-time
temperatures rose by 0.6°C per century.
Nights warmed by 1.5°C per century. |
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Why are the nights warmer?
We aren't sure. It may be because
of increased cloudiness.
Clouds act as a blanket. They trap
and reflect heat that rises from warm
ground. |
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