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SP11%20Ch7%20review - Chapter 7 Atmospheric Circulations...

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Chapter 7: Atmospheric Circulations Scales of Motions square6 microscale square6 mesoscale square6 synoptic (weather map) scale square6 planetary (global) scale Fig 7.2. 7.3, 7.4 The formation of a dust devil. head2right On a hot, dry day, the atmosphere next to the ground becomes unstable. head2right As the heated air rises, wind blowing past an obstruction twists the rising air, forming a rotating column, or dust devil. head2right Air from the sides rushes into the rising column, lifting sand, dust, leaves, or any other loose material from the surface. square6 isobars and density differences square6 thermal circulations – Heating and cooling of the atmosphere above the ground create cold, core high pressure cells and warm, core low pressure cells. square6 Sea and Land Breeze square6 Uneven heating of land and water square6 Day: land hot, water cold = sea breeze square6 Night: water hot, land cold = land breeze square6 Sea breeze convergence Land breezes occur because land cools off faster than water.
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