Which one of the following set of conditions favors the development of a tropical cyclone? SST Latitude Vertical wind shear A 28 °C 15 degrees N 45 km per hr B 29 °C 10 degrees N 12 km per hr C 21 °C 30 degrees N 10 km per hr Answer: _____
2. According to Figure 12.9 of your Weather Studies textbook, the highest frequency of Atlantic basin hurricanes occurs in [(August) (September) (October)].
3. Wind pressure, the force per unit area caused by air in motion, increases with the square of the wind speed. Suppose that a tropical depression with a maximum sustained wind speed of 50 km per hr (31 mph) intensifies to hurricane strength with a maximum sustained wind speed of 200 km per hr (124 mph). Consequently the wind pressure increases by a factor of _____.
4. As a hurricane intensifies over tropical waters, its lowest surface pressure drops from 980 mb to 940 mb. Accompanying this drop in air pressure is a [(rise) (fall)] in sea level by approximately _____ m. (Refer to the storm surge discussion in your Weather Studies textbook, which notes about a 0.5 m rise in sea level for a 50-mb drop in surface pressure.)
5. According to Figure 12.22 of your Weather Studies textbook, the average annual number of Atlantic hurricanes occurring during the period 1995-2010 [(increased) (stayed about the same) (decreased)] compared to the numbers in the period from 1970 to 1994.
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