20 - T Shortest day of the year in S. hem. The earth sun...

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Why is it hot in the tropics and cold in the poles ? T The Earth’s surface is curved relative to the incoming solar radiation. T Direct rays (most intense) are always in the tropical latitudes (23.5 º S to 23.5º N) T As a result, solar radiation is diffuse towards and in the polar regions. T Duration of Daylight for Certain Latitudes T Will be using this chart as we talk about the solstices and equinoxes Earth’s Revolution Around the Sun Earth revolves around the sun every 365.242 days First lets talk about the Summer Solstice…. . T Summer Solstice (~ June 21) in N. hemisphere T Direct rays at 23.5o N (Tropic of Cancer) T Northern hemisphere receives more energy T 24 hours of sunlight (Arctic Circle to North Pole) T Longest day of the year in N. hem.
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Unformatted text preview: T Shortest day of the year in S. hem. The earth sun system h Winter Solstice (~ Dec. 21) in N. hemisphere T Direct rays at 23.5o S (Tropic of Capricorn) T Southern hemisphere receives more energy T 24 hours of sunlight (Antarctic Circle to South Pole) T Shortest day of the year in N. hem. T Longest day of the year in S. hem. Earths Revolution Around the Sun Solstice Conditions Circle of illumination grazes Arctic and Antarctic Circles June Solstice: north pole has 24 hours of daylight; daylength increases from equator to north pole December Solstice: south pole has 24 hours of daylight; daylength increases from equator to south pole...
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