The Future Positive Feedbacks to Global Warming Warming oceans and soils are absorbing less CO 2 , so more CO 2 is accumulating in the atmosphere. Melting permafrost is now emitting CO 2 and methane; the more melting, the greater the emission.
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Three Climate Change Scenarios:
Expected (1.3° C Increase)
Severe (2.6° C Increase)
Catastrophic (5.6° C Increase)
Reference: The Age of Consequences: The Foreign Policy and National Security Implications of Global Climate Change,Center for Strategic and International Studies, Washington, DC , November 2007.