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Seasons in the Southern Hemisphere

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Brittany Salisbury

on 1 March 2016

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Transcript of Seasons in the Southern Hemisphere

Seasons in the Southern Hemisphere
On June 21, the Southern Hemisphere is adjusting to a different season.
Local Seasonal Variations
Hills that face south receive more sunshine and become warmer than the partially shielded north-facing hills.
Daily Warming and Cooling Air Near the Surface
In a way, each sunny day is like a tiny season as the air goes through a daily cycle of warming and cooling.
Focus 3.2
Solar Heating and the Noonday Sun
Many people are turning to the sun as an effective energy source for their homes.
Seasons in the Southern Hemisphere
The Southern Hemisphere is tilted away from the sun.
The June solstice marks the astronomical beginning of winter.
The spring and summer are a week longer in the Northern Hemisphere than the Southern.
In northern latitudes, hillsides that face south usually have a longer growing season.
Snow usually lingers on the ground for a longer time on north slopes than on the warmer south slopes.
Ski runs are built facing north wherever possible.
The air warms during the morning hours as the sun gradually rises higher in the sky.
The sun reaches its highest point around noon.
The air reaches its maximum temperature later in the afternoon.
Daytime Warming
Air is a very poor conductor of heat.
As the sun rises, the air in contact with the ground heats up.
Thermals are rising air bubbles.
In calm weather, thermals are small and don't effectively mix the air near the surface.
There is an energy surplus for two to four hours after noon.
Extreme High Temperatures
On July 10, 1913, Greenland Ranch in Death Valley, California, reported the highest temperature observed in the world which was 134 degrees F.
One of the hottest urban areas is Palm Springs, California.
The heat wave of 1983 destroyed about $7 billion in crops.
The hottest place on earth is observed to be Dallol, Ethiopia.
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