Passage III

The tropopause is the transition between 2 layers of Earth's s atmosphere: the troposphere (the layer that begins at Earth's surface) and the stratosphere (the layer just above the troposphere). Figure 1 shows how air temperature changes with altitude at 3 latitudes (0°, 45° N, and 90° N), as well as the average tropopause altitude for each of those latitudes. Figure 2 shows, for the tropical latitudes, the monthly averages for tropopause altitude, tropopause air pressure, and tropopause air temperature determined for a particular 30-year perIod.

15. According to Figure 1, at 0° latitude, how does the air temperature in the troposphere change with increasing altitude from Earth’s surface to the tropopause, and how does the air temperature in the stratosphere change with increasing altitude from the tropopause to 27 km?

Answer and Explanation

Your Answer is

Correct Answer is D

Explanation

According to the first sentence of the first paragraph of the article, we can know that tropopause is the boundary between troposphere and stratosphere.

Look at figure 1, the troposphere is below the tropopause marked by the arrow on each curve. In the troposphere, as the altitude increases, the air temperature is decreasing, so it is a decrease;

In the stratosphere where the arrow goes up, as the altitude rises, the air temperature also rises, so it is increase