86. Many hot deserts are located in the Western side of the continents. Which among the following phenomena would be sufficient to explain the fact given in question?
i) Off shore Trade Winds
ii) Cold Oceanic Currents
iii) Both i and ii
iv) None of the above
Options:
86. Many hot deserts are located in the Western side of the continents. Which among the following phenomena would be sufficient to explain the fact given in question?
i) Off shore Trade Winds
ii) Cold Oceanic Currents
iii) Both i and ii
iv) None of the above
Options:
The correct option is C c) iii only
C) Explanation:
The trade winds blow in the North Easterly direction in the northern hemisphere while they blow in the South Easterly direction in the southern hemisphere. As such they blow over land and very dry thus no possibility of causing precipitation. The presence of cold ocean currents along the western shores of continents leads to the development of high pressure over the water surface. This high pressure leads to subsidence of air hinders cloud formation. In case of hot deserts like the Mojave desert (USA) where the Rockies and the Thar desert (India) where the Aravallis act as orographic barrier to the rain bearing winds.
C)
Explanation:
The trade winds blow in the North Easterly direction in the northern hemisphere while they blow in the South Easterly direction in the southern hemisphere. As such they blow over land and very dry thus no possibility of causing precipitation. The presence of cold ocean currents along the western shores of continents leads to the development of high pressure over the water surface. This high pressure leads to subsidence of air hinders cloud formation. In case of hot deserts like the Mojave desert (USA) where the Rockies and the Thar desert (India) where the Aravallis act as orographic barrier to the rain bearing winds.
