angle of insolation
TRANSCRIPT
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What is weather?
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Weather• Weather it is the condition of the atmosphere
at a particular time and place .
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What can cause the changes of weather?
• Weather variables:1) Temperature 2) Wind 3)Moisture 4)Precipitation5)Cloud Cover
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Insolation • It is the amount of sun energy reaching the
Earth at a given time and place
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What is the angle of insolation?• a measure of how high the sun is in the sky • measured from the horizon up to the position of the sun
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What happens as the angle increases or decreases?
• As the angle of insolation increases, intensity increases. (heat concentrated in smaller area.)
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• As the angle of intensity decreases, heat is spread out over a larger area.
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Low angle: Less absorbedHigh angle: More absorbed
• Intensity of insolation varies over the Earth because of the curvature of the Earth.
Earth
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Where is intensity the greatest and lowest?
• Intensity greatest near the Equator.– Sun’s rays are direct
• Intensity low at the poles
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At what time is the angle and intensity of insolation greatest?
•The noon sun has the greatest angle of insolation.
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How to measure angle of insolation ?
• WE can measure ion angle of insolation
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Why does the angle of insolation change between midday and evening?
The angle of insolation decreases because the Earth’s rotation ,and the air temperature usually decrease
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Measuring Temperature