EARTHSC 2GG3 Lecture Notes - Lecture 15: Icelandic Low, Azores High, Pleistocene
5 Sep 2014
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Document Summary
Earth"s atmosphere is subject to cyclic changes: many cyclic changes have impact on weather-related hazards, heat building during daytime hours can cause afternoon thunderstorms and tornadoes: daily cycle, many climate-controlled hazards are part of seasonal cycles. Two hemispheres of earth experience summer at different times. Earth is not closer to sun in summer. Earth"s axis of rotation is tilted 23. 5o to plane of orbit around sun. Northern hemisphere receives maximum solar radiation when sun points directly at. Warmest temperatures lag behind by about a month takes time to heat up land and. 23. 5on (at summer solstice) water: other observed cyclic changes in northern hemisphere climate may be explained by. Changes in solar radiation caused by changes in earth"s orbit. Changes in atmospheric composition: el ni o, oceanic circulation in equatorial pacific usually is pushed westward by trade winds, warm surface water off peru is blown westward and replaced by upwelling of cold, deep, nutrient-rich water (productive fisheries)
