BY Abitur Geographie EA Practice Questions - Bavaria Abitur Geographie (erhöhtes Anforderungsniveau Leistungsfach) Exam

How does the water-vapour feedback amplify anthropogenic warming?

A warmer atmosphere holds more water vapour (Clausius–Clapeyron); because water vapour is itself a greenhouse gas, the initial CO₂-driven warming is reinforced Water vapour destroys all CO₂, so humidity cools the planet Increased humidity always increases albedo enough to cancel any greenhouse warming Water vapour only affects weather, never the planetary radiation budget

Correct Answer:

A warmer atmosphere holds more water vapour (Clausius–Clapeyron); because water vapour is itself a greenhouse gas, the initial CO₂-driven warming is reinforced

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