Ecology - lecture 4: Welcome to Earth
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13 Terms
Why is it warmer near the equator than the poles?
toward the poles the suns rays are more spread out over a greater surface area due to the earth's angle
Why is there more rain in the tropics?
warm air is less dense so it rises, cools, and precipitates out as rain because cool air holds less moisture
What is Hadley circulation?
The paired convection cells in the lower atmosphere that straddle the equator
What latitudes are typically the most wet?
0º in the tropics
What latitudes are typically the most dry?
30ºN and S
What latitudes exhibit moderate precipitation?
60ºN and S in the temperate zone
What causes the deflection of the winds?
the rotation of the Earth and the Coriolis effect
What determines prevailing wind direction across latitudes?
Global atmospheric circulation
what direction is moving air deflected from in the N. Hemisphere?
Clockwise
What direction is moving air deflected in the S. Hemisphere?
Counter clockwise
What is the rain shadow effect?
the area of low rainfall found on the leeward (downwind) side of a mountain range
What does this figure represent?
The rain shadow effect
What two factors determine where desserts are on regional scales?
Wind direction and mountain ranges