GEO 211 1st Edition Lecture 8 Outline of Last Lecture I Radiation and Temperature continued A Absorption B Scattering C Reflection and albedo D Absorption by selected gases of the atmosphere a Selective absorbers b shaded areas c strong absorbers of infrared outgoing radiation d Strong absorbers of incoming short wave radiation E Greenhouse effect warming Earth s surface a Main greenhouse gases b Less greenhouse gases Outline of Current Lecture II Solar Particles and Aurora III Chapter 3 Earth and Sun Relationships A Why do we have seasons B Physical factors causing seasonal variations 1 Earth s revolution 2 Earth s rotation 3 Earth s angle of inclination 4 Earth s axis orientation 5 Earth s sphericity C Earth s revolution a Perihelon b Taphelion D Earth s rotation E Earth s angle of inclination F Earth s axis orientation G Earth s sphericity a Polaris H Solastice Conditions These notes represent a detailed interpretation of the professor s lecture GradeBuddy is best used as a supplement to your own notes not as a substitute Current Lecture II Solar Particles and Aurora Called solar wind or plasma as they travel through space Interact with ionosphere near the poles creating the auroras Pg 54 Figure 2 22 in textbook Aurora borealis N H Aurora australis S H Chapter 3 Earth and Sun Relationships A Why do we have seasons a Seasonal variations in 1 Sun s angle above the horizon 2 Length of daylight B Physical factors causing seasonal variations 1 Earth s revolution 2 Earth s rotation 3 Earth s angle of inclination 4 Earth s axis orientation 5 Earth s sphericity C Earth s revolution Motion of Earth around the Sun One complete orbit 1 year Earth s orbit is elliptical a Perihelon January 3 Earth is closest to the Sun b Taphelion Earth is furthest from the Sun D Earth s rotation Earth spins West to East on its axis One complete spin 24 hours cause day and night E Earth s angle of inclination Earth s axis is tilted 23 1 2 not quite perpendicular to the plane of its orbit around the Sun F Earth s axis orientation Earth s axis remains pointed in the same direction Polaris towards the North star G Earth s sphericity a Causes variations in amount of solar energy reaching the surface from equator to the poles H Solstice Conditions June 21 22 noon strikes perpendicular or 23 1 2 N tropic of cancer 1st official day of summer summer solstice
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