insolation insolation = incoming solar radiation energy in = energy out or, insolation in = heat out...
Post on 26-Mar-2015
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Insolation Insolation = Incoming Solar Radiation Energy in = Energy out or, Insolation In = Heat Out (Earth only emits heat) Slide 2 Factors 1.Angle of insolation - direct or indirect 2.Length of Day - how much sunshine is available. 3.Type of Surface: -- light or dark -- rough or smooth Slide 3 Slide 4 Angle of Insolation Slide 5 Slide 6 Axis Tilted Earths axis tilts 23.5 0 Always tilts the same way = parallelism Seasons result. Slide 7 Parallelism Slide 8 Slide 9 Seasons Slide 10 Equinox Equinox = when the sun is directly over the equator. Day and night are equal = 12 hours long Sun rises due East, sets due West Vernal (spring) Equinox = March 20 Autumnal (fall) Equinox = Sept. 22 Slide 11 Solstice Solstice = sun stop Summer Solstice ( 6/21) = Sun is directly over 23.5 0 N (Tropic of Cancer) = most daylight Winter Solstice (12/21) = Sun is directly over 23.5 0 S (Tropic of Capricorn) = least daylight Slide 12 Slide 13 Rotation Daily Motion = stars and planets rise in the East and set in the West. Why? Earth rotates counterclockwise at 15 o / hr. Evidence: - Foucaults Pendulum - Coriolis Effect all winds move rightward in the northern hemisphere Slide 14 Slide 15 Length of Day How long is a day? Is it 24 hours or 23 hrs. 56 minutes? Sidereal Day = actual time it takes to rotate 360 0 (23h 56m). But, earth revolves around sun 1 0 in a day. So, it takes an additional 4 minutes to complete turn. Solar Day = Noon to Noon = Time it takes to rotate 361 0 (24h). Slide 16 Slide 17 Revolution Earth revolves around Sun 1 o / day. Also counterclockwise. Evidence: Seasons. Constellations change during year. Slide 18