Chapter 9. Atmosphere’s Planetary Circulation
Intermediate
1. Compare and contrast the climate graphs representing mean monthly precipitation at San Diego, CA and Charleston, SC (Figure 9.9 of your Weather Studies textbook). In San Diego, the meteorologically designated rainy season is [(Winter) (Spring) (Summer) (Fall)] while in Charleston, the greatest monthly rainfall totals occur in the [(Winter) (Spring) (Summer) (Fall)] season. In Charleston, [(convective showers and thunderstorms) (frontal overrunning)] likely account(s) for the bulk of the summer rainfall.
2. For both San Diego and Charleston, from March to April the mean monthly precipitation [(increases) (remains the same) (decreases)] probably because of fewer [(thunderstorms) (low pressure systems)].
3. Examine the march of mean monthly temperature and mean monthly precipitation for New Dehli/Safda, India (Figure 9.12, of your Weather Studies textbook). The warmest month on average is [(May) (June) (July) (August)] which occurs [(just prior to) (during) (after)] the monsoon rainy season.
4. According to Figure 9.25 of your Weather Studies textbook, in 1982-83, the southern oscillation index was [(positive) (negative)]. This [(was) (was not)] consistent with the nature of El Niño as shown by the sign of the sea-surface temperature anomalies in the region of the tropical Pacific bounded by 5 degrees N/5 degrees S and from 120 to 170 degrees W. Refer to Figure 9.33 on page 302.
5. Based on information in Figure 9.44 of your Weather Studies textbook, the strongest El Niño episodes feature anomalies that tend to be [(greater)(less)] than anomalies associated with the strongest La Niña episodes.

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Chapter 8 Wind and Weather
Intermediate
1. Convert the following wind speeds, using the equivalents as 1 knot = 1.15 mph = 0.51 m/s. (Round answers to the nearest whole number):
30 statute mph = __________ knots 10 m per second = __________statute mph 55 knots = __________statute mph
2. Based on the standard atmosphere (Table 5.2 of your Weather Studies textbook), compute the vertical pressure gradient in mb per km between sea-level and an altitude of 3 km. Answer: _________ mb per km. The vertical pressure gradient is [(greater than) (about the same as) (less than)] a typical horizontal pressure gradient displayed on a surface weather map.
3. If the horizontal air pressure gradient increases, the wind speed will [(increase) (not change) (decrease)] and the magnitude of the Coriolis Effect will [(increase) (not change) (decrease)].
4. The magnitude of the Coriolis Effect is greatest at [(5) (35) (90)] degrees latitude.
5. In a typical extra-tropical cyclone, the vertical motion of air is typically only 1% to 10% of the horizontal wind speed. If the horizontal wind is blowing at 20 km per hour, what is a reasonable value for the vertical air motion in a cyclone? [(0.2-2.0 km per hr) (2-20 km per hr) (20-200 km per hr)]

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