chapter_03 - Chapter 3 Seasonal and Daily Temperatures...

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Click to edit Master subtitle style Chapter 3: Seasonal and Daily Temperatures
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Earth revolves around the Sun at thousands of km/hr Distance from sun does not determine the seasons!! Earth’s Revolving
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Earth’s Rotation
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§ Seasons are regulated by the amount of solar energy received at the surface I. Why Does Earth Have Seasons?
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Solar Angle’s Effect on Radiation Intensity
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I. Why Does Earth Have Seasons? § Why are summer days longer than winter days? § Why is the noon sun higher in the sky in summer? § Is the axis always pointing in the same direction? § What If Earth were not tilted?
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Earth & The Seasons
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I. Uneven heating of Earth’s surface causes predictable latitudinal variation in climate. North Pole Earth Equator South Pole Climatic Variation & Seasons on Earth
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Uneven heating of Earth’s surfacecauses the atmospheric circulation Greater heating at equator than at poles Climatic Variation & Seasons on Earth
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http://www.cnrt.scsu.edu/~jcash/teaching/astro/seasons.pdf Some Common Misconceptions § Seasons are caused by the distance to the sun? § Seasons are caused by the weather?
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Tilt! Because of the tilt of Earth’s axis, the amount of radiation received by Northern and Southern Hemispheres varies seasonally Earth’s distance from the sun varies throughout the year – doesn’t that cause the seasons? http://www2.for.nau.edu/courses/hart/for479/Documents/Lecture%202,%20Ecosystem%20Ecology.ppt What about seasons? Why do we have them?
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Tilt of the Earth’s axis toward or away from the sun creates the seasons North Pole Earth South Pole Equato r Earth’s Seasons
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North Pole Earth South Pole Equat or Earth’s Seasons Tilt of the Earth’s axis toward or away from the sun creates the seasons
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Earth & The Seasons
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Summer and Winter Solstice § Solstice is when sun is at its greatest distance from equator.
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Vernal and Autumnal Equinox § Equinox – sun is directly over the equator and day and night are equal in length
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