GEOL 1340 Lecture Notes - Lecture 8: Shortwave Radiation, Solar Wind, Ionosphere
10 Sep 2016
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Thinning over polar regions in last couple years. High e particle from solar flares and sunspots. Cfc"s from n hemisphere moved s by atm winds and concentrated over. T decrease at higher altitude due to decreasing influence of ozone. Doesn"t absorb any significant portion of solar radiation. Magnetic fields concentrate solar winds to make auroras. Atm and electromagnetic spectrum o o o o o o. Incoming shortwave gamma and x-rays stopped by ionosphere. Incoming solar radiation affected by atm o o o. Scattering: change direction of light"s movement, without altering wavelength. Refraction: change in speed and direction of light, causing path to bend. Reflection: e bounces off surface and returned o. Darker colors lower albedos (less reflective) and opposite for lighter colors. Cloud-albedo forcing: when clouds cause increase in albedo o. But surface cooling since solar radiation doesn"t reach earth as much. Inhibits escape of longwave radiation emitted by surface. Thin clouds allow more shortwave radiation to reach surface.
