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Unformatted text preview: light 24 Figure 3.4 Summer north of the artic circle will reveal a period of 24 hour Summer sunlight, where the earth's surface does not rotate out of solar exposure, but instead experiences a midnight sun. exposure, Earth's Tilt & Atmosphere Earth's Figure 3.5 Figure 3.6 Earth's atmosphere reduces the amount of insolation Earth's striking earth's surface. striking Earth's atmosphere and tilt combine to explain variation in received solar radiation. in Earth's Unequal Heating Earth's Figure 3.7 Incoming solar radiation is not evenly distributed across all lines of Incoming latitude, creating a heating imbalance. latitude, Earth's Energy Balance Earth's
Earth's annual Earth's energy balance between solar insolation and terrestrial infrared radiation is achieved locally at only two lines of latitude. latitude. A global balance is maintained by excess heat from the equatorial region transferring toward the poles. toward Figure 3.8 Longer Northern Spring & Summer Longer Figure 3.9 Earth reaches its greatest distance from the sun during a northern Earth summer, and this slows its speed of revolution. summer, The outcome is a spring and summer season 7 days longer than that experienced by the southe...
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- Spring '10