A negative phase of the Pacific-North American (PNA) pattern is associated with:
A. Colder than normal temperatures in the Pacific Northwest
B. Wetter than normal conditions in the Pacific Northwest
C. Drier than normal conditions in the Pacific Northwest
D. Warmer than normal temperatures in the Pacific Northwest
Answer: Option A
Solution (By JKSSB Mock Tests)
A negative PNA phase is associated with colder than normal temperatures in the Pacific Northwest and warmer than normal temperatures in the southeastern United States, with a trough over western North America.
Explanation:
The greenhouse effect is caused by greenhouse gases (CO2, methane, water vapor, etc.) in the atmosphere that trap outgoing longwave (infrared) radiation, warming the planet.
Explanation:
The leeward side of the Western Ghats receives low rainfall due to the rain shadow effect, creating semi-arid conditions in the Deccan Plateau.
Explanation:
In the Southern Hemisphere, winds around a low-pressure system circulate clockwise (opposite to the Northern Hemisphere) due to the Coriolis force deflecting winds to the left.
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