Environmentalmedium · Past Paper
Which of these describes the 'Positive Feedback Loop' in the context of melting Arctic ice?
AMelting ice increases albedo, cooling the earth
BMelting ice exposes dark water, which absorbs more heat, causing more melting
CIce melting adds salt to the ocean, cooling it
DIce melting stops global warming
✓ Correct Answer: B — Melting ice exposes dark water, which absorbs more heat, causing more melting
As ice melts, less sunlight is reflected and more is absorbed by the dark ocean, which further warms the area and melts more ice.
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