A positive phase of the Pacific-North American (PNA) pattern is associated with:
A. Warmer than normal temperatures in the Pacific Northwest
B. Colder than normal temperatures in the Pacific Northwest
C. Wetter than normal conditions in the southwestern United States
D. Drier than normal conditions in the Pacific Northwest
Answer: Option A
Solution (By JKSSB Mock Tests)
A positive PNA phase is associated with warmer than normal temperatures in the Pacific Northwest and colder than normal temperatures in the southeastern United States, with a ridge over western North America.
Explanation:
Kerala receives the highest rainfall during the southwest monsoon (June-September) because it is the first state to be hit by the monsoon winds, with the Western Ghats causing orographic rainfall.
Explanation:
The Western Ghats receive high rainfall during the southwest monsoon due to orographic lifting. Moisture-laden monsoon winds rise over the mountains, cool, condense, and release heavy rainfall on the windward side.
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