I. Wind A. Pressure Gradient Force One of the major influences on atmospheric circulation and air movement (wind) is the pressure gradient force. For...
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I. Wind A. Pressure Gradient Force One of the major influences on atmospheric circulation and air movement (wind) is the pressure gradient force. For this section you may find Figure 6.6, “Effect of pressure gradient on wind speed,” 4CE p. 149 (3CE p. 140), to be helpful. 1. On a weather map if isobars (air pressure lines) are close together would the winds be (check one) ___ strong, or ___ weak? 2. On a weather map if isobars (air pressure lines) are far apart would the winds be (check one) ___ strong, or ___ weak? B. Coriolis Force Another major influence on global circulation patterns is the Coriolis force. Because the Earth rotates on its axis, air appears to “deflect” in a circular pattern. For this section refer to 4CE Figure 6.7 “The Coriolis force” p. 150 and Figure 6.8b, “Three physical forces that produce winds – Coriolis Force,” p. 152. (3CE Figures 6.8 and 6.7b, pp.141-142) 1. Assume you are in Sydney, N.S., Canada; would the Coriolis force cause deflection (check one) ___ clockwise, or ___ counter clockwise? 2. Assume you are in Sydney, Australia; would the Coriolis force cause deflection (check one) ___ clockwise, or ___ counter clockwise? 3. If you were in Singapore (almost right at the Equator), the water in your tub will drain straight down: ___ true, or ___ false *see my notes
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Fig 6.6
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Fig 6.7 6.8 b Fig 6.10
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