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Feedback effects When the Earth warms up, a large number of changes take place in the atmosphere, the oceans, and the land surface. Some of these changes.

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Presentation on theme: "Feedback effects When the Earth warms up, a large number of changes take place in the atmosphere, the oceans, and the land surface. Some of these changes."— Presentation transcript:

1 Feedback effects When the Earth warms up, a large number of changes take place in the atmosphere, the oceans, and the land surface. Some of these changes can, in turn, affect the temperature. This is called feedback effects. Some of these feedback effects increase global warming, while others reduce it.

2 Feedback effect Negative feedback Positive feedback. Negative feedback effects tend to reduce changes that initially gave rise to them. Positive feedback tends to increase the initial change.

3 Cloud Feedback Loop- Negative feed back Note: negative feedback works in both directions.

4 Water Vapor Feedback -Positive feedback Earth tempera ture Greenh ouse effect Water vapor evapora tion increase Initial increase Note : Just like negative feedback, positive feedback works both ways.

5 Ice Albedo Effect – Positive feedback Note : Just like negative feedback, positive feedback works both ways


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