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, "Pressure gradient determines wind speed," 3CE p. 140 (2CE Figure 6.7, p. 151), to be helpful. On a weather map if isobars (air pressure lines) are close together would the winds be Group of answer choices strong non existant weak