Figure 2.1a shows air pressure ("Hg) for a region centered on 40S. Some specific sites along a linear path on the ground are labelled M through R. Two other points are labelled a and b. A. Which of the map sites M-R best represents the center of a high pressure cell? B. Which of the map sites M-R best represents the center of a low pressure cell? C. Which of the map sites M-R best represents a center of cyclonic circulation? D. Which of the map sites M-R best represents a center of anticyclonic circulation? E. Directly on the map, draw arrows to show the general direction of air circulation (winds) that would occur around the high pressure cell and that would occur around the low pressure cell. F. Draw arrows in the cross-sectional space (Fig. 2.1b) to indicate direction of air movements along the ground surface, and up into the atmosphere. In other words, show where air is rising or descending and where surface winds are moving into or away from the vertically moving air. G. At which map site M-R (Fig. 2.1a) would you expect the fastest wind speeds to be occurring? H. What is the pressure gradient in inches of Hg per 10 miles between a and b if the distance between a and b represents 75 miles on the ground? b) Altitude above ground 30.07 P CO M -29.99. 30.03. 29.91. 29.87 R M N O P Q R Figure 2.1. (a) Pressure map ("Hg), and (b) cross-section space for a Southern Hemisphere area.