Which of the following is a positive feedback loop in the climate system? MCQ with Answer and Explanation

Explanation:
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 thermosphere is characterized by increasing temperature with altitude due to the absorption of solar radiation, making it the hottest layer.

Explanation:
Cold waves in northern India are caused by Western Disturbances, polar winds descending from the Himalayas, and high-pressure systems over Central Asia.