What is the name of the phenomenon where the polar vortex splits or weakens, allowing cold air to move southward?
A. Sudden stratospheric cooling
B. Polar vortex collapse
C. Sudden stratospheric warming
D. Polar amplification
Answer: Option C
Solution (By JKSSB Mock Tests)
Sudden stratospheric warming (SSW) is a phenomenon where the polar vortex weakens or splits due to a rapid increase in stratospheric temperatures, often leading to cold air outbreaks in the mid-latitudes.
Explanation:
The greenhouse effect is the natural process by which certain gases in the atmosphere (greenhouse gases) trap outgoing longwave radiation, warming the Earth's surface and making it habitable.
What is the name of the phenomenon where the atmospheric pressure in the Aleutian Islands is lower than normal and in the Pacific Northwest is higher than normal?
Explanation:
The Pacific-North American Pattern is a large-scale pattern of sea level pressure differences between the Aleutian Islands and the Pacific Northwest.
Explanation:
The Pacific Northwest, including Washington and Oregon, has a marine west coast climate, with mild, wet winters and cool, relatively dry summers due to Pacific Ocean influence.
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