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22 - (subsolar point Characteristics of the atmosphere E...

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EQUINOXES VERNAL -- MARCH 21 AUTUMNAL-- SEPTEMBER 21 E Effects of the Seasons Q Changes in solar intensity E Changes in solar altitude E Changes in day length E Changes in temperature E All of these changes are most extreme at high latitudes and minimized at the equator. l Winter solstice – December 21 E Subsolar point Tropic of Capricorn E Spring equinox – March 21 E Subsolar point Equator E Summer solstice – June 21 E Subsolar point Tropic of Cancer E Fall equinox – September 22 E Subsolar point Equator The latitude at which the noon sun is directly overhead is known as the sun’s declination
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Unformatted text preview: (subsolar point) . Characteristics of the atmosphere. E Composition of the Atmosphere E 97% of air is in first 25 km (16 miles) E Density decreases with altitude. E Constant Gases versus Variable Gases E Constant Gases (permanent) E 97% of air is in first 25 km (16 miles) E Density decreases with altitude Remain in the same proportion in the atmosphere up to 80km regardless of atmospheric density. Nitrogen 78% ** - supports plant growth Oxygen 21% ** Inert 1% Traces...
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