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Feedback on Feedbacks

Guest essay by Rud Istvan In recent weeks, there have been a number of WUWT guest posts on climate sensitivity related matters. Sensitivity is determined by feedbacks to increased CO2. The delta T to doubled CO2 in the absence of feedbacks is 1.1-1.2C. Monckton calculated 1.166C in his new (and unfinished) ‘Feet of Clay’ series…

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How Climate Feedback is Fubar

Guest essay by George White Feedback is the most misunderstood topic in climate science and this misunderstanding extends to both sides of the debate. This is disturbing because the theoretical support for substantial warming cause by man’s CO2 emissions depends exclusively on the ability of positive feedback to amplify something small (3.7 W/m2 of forcing…

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Cloud Feedback

Guest Post by Willis Eschenbach In the comments to Christopher Monckton’s latest post, Nick Stokes drew attention to Soden and Held’s analysis of feedback in the climate models. I reproduce their Table 1 below: Figure 1. Soden and Held’s Table 1, showing all of the feedback parameters calculated from the models. I found several amazing things in…

Soil C stocks are the net result of outputs and inputs of plant C, but most warming research focuses only on outputs, making stock responses highly uncertain. Warming-induced outputs (red arrows) in the schematic are represented as CO2 fluxes, reflecting the assumption in ESMs that the land-C–climate feedback occurs through warming stimulating the activities of soil microorganisms that decompose.

Soil feedbacks are a big uncertainty in climate change

From the YALE SCHOOL OF FORESTRY & ENVIRONMENTAL STUDIES Managing uncertainty: How soil carbon feedbacks could affect climate change There is more than twice as much carbon in the planet’s soils than there is in its atmosphere, so the loss of even a small proportion of that could have a profound feedback effect on the…

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Problems With Analyzing Governed Systems

Guest Post by Willis Eschenbach I’ve been ruminating on the continuing misunderstanding of my position that a governor is fundamentally different from simple feedback. People say things like “A governor is just a kind of feedback”. Well, yes, that’s true, and it is also true that a human being is “just a bag full of organic…