Chapter 8, Problem 1E

Using Figure 8-2:

1. a. Circle the area with the greatest pressure gradient.
2. b. Use arrows to show the direction of pressure gradient force at a few locations. (These are typically drawn perpendicular to isobars.)
3. c. Label a region where you would expect the lightest winds.

To determine

The area with the greatest pressure gradient in Figure 8-2 using circle.

Answer to Problem 1E

The map showing the area with the greatest pressure gradient is given below:

Explanation of Solution

“The magnitude of pressure gradient force is a function of the pressure difference between two points and air density.”

The map given in Figure 8-2 shows isobars, which are lines that connect areas with equal pressure. Closer isobars represent areas with higher pressure gradient. On the basis of this, the greatest pressure gradient is marked using a circle in the map towards the top right side of the Figure.

To determine

The direction of pressure gradient force at some locations in Figure 8-2 using arrows.

Answer to Problem 1E

The map with the direction of pressure gradient force at some locations indicated using arrows is shown below:

Explanation of Solution

The direction of pressure gradient force is usually drawn perpendicular to the isobars. The pressure gradient force is generally directed from the region of high pressure to lower pressure.

To determine

The region where the lightest winds are expected to occur in Figure 8-2.

Answer to Problem 1E

The area expected to experience the lightest winds is labelled in the map given below:

Explanation of Solution

The isobars that are widely-spaced generally denote a gradual pressure gradient and lighter winds whereas the closely-spaced isobars denote steep pressure gradient and stronger winds.