21 - : point on the Earth’s surface where the sun is...

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SOLSTICES SUMMER - JUNE 21 WINTER - DECEMBER 21 Where are the overhead rays of the sun on these days? U Autumnal Equinox in (~ Sept. 22) N. hem. U Direct rays at equator U 12 hours of daylight everywhere U Vernal Equinox in (~ March 21) N. hem. U Direct rays at equator U 12 hours of daylight everywhere Earth’s Revolution Around the Sun Equinox Conditions Circle of illumination passes through both poles-separates night hemisphere from day hemisphere Subsolar point at equator Day and night of equal length everywhere on the globe Occurs twice per year Vernal Equinox: March 21 Autumnal Equinox: September 23 Subsolar point
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Unformatted text preview: : point on the Earth’s surface where the sun is directly overhead at noon EQUINOXES VERNAL -- MARCH 21 AUTUMNAL-- SEPTEMBER 21 Earth’s Revolution Around the Sun The Four Seasons Circle of illumination : separates day hemisphere from night hemisphere Equinox : time when subsolar point falls on equator and circle of illumination passes through both poles Winter solstice : solstice occurring on December 21 or 22, when the subsolar point is at 23 1/2° S; December Solstice Summer solstice : solstice occurring on June 21 or 22, when the subsolar point is at 23 1/2° N; June Solstice...
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This note was uploaded on 06/12/2011 for the course GEOGRAPHY 600-201010 taught by Professor Christopherpost during the Spring '10 term at Kent State.

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