LECTURE_15_03-30-10_Chap_10___14-Weather

LECTURE_15_03-30-10_Chap_10___14-Weather - Climate/weather...

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Unformatted text preview: Climate/weather Hazards FINISH (Chap. 10) Basic elements of weather El Nino and La Nina North Atlantic Oscillation FOR THURSDAY: VIDEO QUIZ Six Degrees Could Change the World NEW STUFF (Chap. 14) Hurricanes, Typhoons, and Cyclones Formation of Hurricanes and Cyclones Extratropical Cyclones Noreasters Associated Hazards/Damages-Storm surge-Waves and Winds-Rainfall and Flooding ANNOUNCEMENT: -Skip Chapter 11 (Streams and Flood Processes) Chapter 12 (Floods and Human Interaction) Fig. 10-5, Fig. 10-5 The Water Cycle Fig. 10-14, p.256 Global Air Circulation westerlies trade High and low pressure systems Trade winds : Regional winds that blow from northeast to southwest between latitudes 30 degrees north; southeast to northwest between latitudes 30 degrees south As a result of the trade winds (and rotation of the earth): (1) Ocean currents move from East to West across the worlds oceans (2) Warm air masses (warm fronts) are also pushed from East to West across the Earth Normal ocean circulation clockwise in northern hemisphere Cycles in ocean/atmosphere circulation Trade winds : Regional winds that blow from northeast to southwest between latitudes 30 degrees north; southeast to northwest between latitudes 30 degrees south HOWEVER! Approximately every 6 years (between November to March) the Pacific Ocean reverses is circulation pattern resulting in the West to East migration of ocean water and warm air masses resulting in E L N I N O conditions El Nio : Trade Winds weaken ; equatorial warm water moves east to coast of South America Higher sea surface temp in the Pacific Ocean Fig. 10-21, p. 260 S o u t h A m e r i c a Australia Trade Winds S o u t h A m e r i c a Australia Indonesia Indonesia La Nia : Trade Winds strong ; equatorial warm water moves west to Indonesia Lower sea surface temp in the Pacific Ocean Fig. 10-22b, p. 260 Results of La Nia conditions Fig. 10-23, p.261 Advance of an El Nio over 9 months Eastward migration of warm water and moisture Results of El Nio conditions Fig. 10-22a, p. 260 Common...
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This note was uploaded on 11/11/2011 for the course ISP 203 taught by Professor Paquette during the Fall '08 term at Michigan State University.

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LECTURE_15_03-30-10_Chap_10___14-Weather - Climate/weather...

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