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November 14, 2011. Objective: Gain knowledge of how wind flows from high pressure to low pressure. Agenda; Textbook pages 561-564 answer questions 1-5, 6,8 Prevailing Wind notes Lab: Global Wind http:// www.gamequarium.org/cgi-bin/search/linfo.cgi?id=7824. HOW CAN WE MEASURE THE WIND?.
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Objective: Gain knowledge of how wind flows from high pressure to low pressure • Agenda; • Textbook pages 561-564 answer questions 1-5, 6,8 • Prevailing Wind notes • Lab: Global Wind • http://www.gamequarium.org/cgi-bin/search/linfo.cgi?id=7824
HOW CAN WE MEASURE THE WIND? • Wind Speed • Winds are caused by differences in air pressure. • Wind will blow from high pressure to low pressure. • The difference between the high and low is the pressure gradient. • This is measured by the isobars.
Wind Direction • The Coriolis effect will deflect wind to the right in the Northern Hemisphere, and to the left in the Southern Hemisphere. • Winds are named for where they are coming from. A west wind is blowing from west to east.
CIRCULATION OF THE ATMOSPHERE • Convection Cells • The earth is heated unevenly because the earth is round. This creates unequal air pressures around the earth. • Areas of low pressure are also called • "areas of convergence". • Areas of high pressure are also called • "areas of divergence".
RISING SINKING AIR AIR WIND Convection Current
Coriolis Effect Because the Earth is rotating, the movement of objects appears to curve. In the NORTH the curve is to the right.
Coriolis effect • http://www.classzone.com/books/earth_science/terc/content/visualizations/es1904/es1904page01.cfm?chapter_no=visualization
H 900 L 600 L Staunton 300 H H 00 L L 300 H H 600 L L 900 H
Narrow Bands of high-speed winds that blow in the upper troposphere.
Weather Movement: • The weather in the United States will tend to move from southwest to northeast.
