Category Archives: Sensitivity & feedbacks

Climate sensitivity to cumulative carbon emissions

By Nic Lewis

An observational estimate of transient (multidecadal) warming relative to cumulative CO2 emissions is little over half that per IPCC AR5 projections.

AR5 claims that CO2-caused warming would be undiminished for 1000 years after emissions cease, but observations indicate that it would halve. Continue reading

Warming patterns are unlikely to explain low historical estimates of climate sensitivity

By Nic Lewis

A critique of of a new paper by Andrews  et al., Accounting for changing temperature patterns increases historical estimates of climate sensitivity.

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Hothouse Earth

by Judith Curry

We need to raise the bar on how we think about the possible worst case scenario for climate change.

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Impact of recent forcing and ocean heat uptake data on estimates of climate sensitivity

by Nic Lewis

We have now updated the LC15 paper with a new paper that has been published in the Journal of Climate “The impact of recent forcing and ocean heat uptake data on estimates of climate sensitivity“.  The paper also addresses critiques of LC15.

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Emergent constraints on climate sensitivity in global models. Part III

by Nic Lewis

The two strongest potentially credible constraints, and conclusions.

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Emergent constraints on climate sensitivity: Part II

by Nic Lewis

The four constraints that Caldwell assessed as credible.

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Emergent constraints on climate sensitivity: Part I

by Nic Lewis

Emergent constraints on climate sensitivity:  their nature and assessment of validity.

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