Why major hot deserts located between 20-30 degree North latitude on Western Side?
Q. Why major hot deserts are located between 20-30 degree North latitude on Western Side ?
1. High atmospheric pressure found near 30° latitude lines
2. Eastern region of 20-30N receive rain due to moisture laden trade winds, but they become dry till they reaches western side
3. Relative humidity is very low in the desert
Which of the above statements is/are correct? - Published on 06 May 15a. 1,2
b. 1,3
c. 2,3
d. All
ANSWER: All
The Sahara and Australian deserts are caused by regions of high
atmospheric pressure found near 30° latitude lines. High pressure prevents air near the ground from rising and cooling. The eastern region of 20-30N receive rain due to moisture laden trade winds, but by the time they reach western side, they become dry. The air becomes saturated with the water vapor at given temperature and pressure, it results into cloud formation. But Relative humidity is very low in the desert, every droplets of moisture is evaporated before the air becomes saturated with water. Hence lack of cloud formation.
