Death of the Positive Feedback Theory – Climate Sensitivity Continues to Decline

This post was inspired by this article by Dr. J Curry about her new paper about lower climate sensitivity. see here  Note that she also presented this data before Senate Energy Committee.

The vast majority of global warming is predicted to occur from positive feedbacks to the small warming caused by the increased backradiation from increased CO2 content(max of 1 degree is possible due to logarithmic decline in backradiation). The warming is theorized to increase humidity which is predicted to increase temperature by increasing the greenhouse effect and cause up to 85% of the total warming. But what if the humidity in the air is already mostly saturated? Positive feedback is also known as the amplification theory. Positive feedbacks in nature usually are short term or local and are balanced by negative or reaction feedbacks that cause the system to return to equilibrium. Long term systems in nature by definition have to have net negative or balancing feedbacks or the system would be unstable and therefore be short life.

The CO2 content of the atmosphere has risen dramatically every year for many decades now and yet the humidity and the temperatures have not risen a fraction of what was predicted by the theories. The latest IPCC AR5 lowered the climate sensitivity estimates and there have been  many new peer reviewed and published papers that have even lower sensitivity estimates.(less than 1.5 degrees) . The new estimates are converging to be less than the safe limit of less than 2 C.

The Positive Feedback Theory and Catastrophic Climate Change are on the final circle of the sewer drain of scientific history. If there is NO significant amount of warming then there is NO CRISIS.

Climate sensitivity

Click on image for higher res version.


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