Which of the following is the primary reason for the formation of rain shadow deserts?
A. Mountains blocking moisture-laden winds
B. Subtropical high pressure
C. Cold ocean currents
D. Monsoon winds
Answer: Option A
Solution (By JKSSB Mock Tests)
Rain shadow deserts form when mountains block moisture-laden winds from reaching the leeward side. As air rises over the mountains, it cools and releases precipitation on the windward side, leaving the leeward side dry.
Explanation:
Nitrogen is not a greenhouse gas. It makes up about 78% of the atmosphere but does not absorb infrared radiation. Carbon dioxide, methane, and nitrous oxide are significant greenhouse gases.
Explanation:
The Arctic Oscillation (AO) is a large-scale climate pattern of sea level pressure differences between the Arctic and the mid-latitudes of the Northern Hemisphere. It affects weather patterns across the entire Northern Hemisphere.
Explanation:
A negative AO phase is characterized by higher than normal pressure over the Arctic and lower than normal pressure over the mid-latitudes. This allows cold Arctic air to spill southward, leading to colder winters in the mid-latitudes.
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