Climate as a heat engine

Guest essay by Jan Kjetil Andersen As Willis describes in his article on December 21, the atmosphere can be seen as a gigantic heat engine, i.e. a machine which convert thermal energy, namely temperature, into mechanical energy, namely wind. It may seem a bit strange to view the weather system as a kind of machine…

The 'worse than we thought' model

From ETH Zurich: Underestimated future climate change? 25.11.2013 | Fabio Bergamin New model calculations by ETH researcher Thomas Frölicher show that global warming may continue after a stoppage of CO 2 emissions. We cannot rule out the possibility that climate change is even greater than previously thought, says the scientist. A change in ocean heat…

CO2 by the numbers: having the courage to do nothing

Guest essay by Ed Hoskins. Some simple numbers on the effect of CO2 concentration on temperature As the temperature increasing effect of atmospheric CO2 is known to diminish logarithmically with increasing concentration, these notes clarify the actual amount of warming that might result from additional CO2 released into the atmosphere by man-kind and the temperature…

The Met Office responds to Doug Keenan's statistical significance issue

Bishop Hill reports that Doug Keenan’s article about statistical significance in the temperature records seems to have had a response from the Met Office. WUWT readers may recall our story here: Uh oh, the Met Office has set the cat amongst the pigeons: =========================================== The Parliamentary Question that started this was put by Lord Donoughue…

HadCRUt4: revision or revisionism?

Guest essay by Christopher Monckton of Brenchley As Bob Tisdale has recently pointed out, the monthly temperature anomaly series published by the Hadley Centre and the Climatic Research Unit at the University of East Anglia has just been extensively revised. A commenter on a previous posting about the temperature record asked whether the entire 163-year…

Wild claim from University of East Anglia

No mays, coulds, or mights here in this press release headline from UEA. They say “will“.  As usual, they assume nature so poorly equipped her creations that they can’t adapt. That’s some ballsy certainty. Climate change will cause widespread global-scale loss of common plants and animals More than half of common plants and one third…

On the scales of warming worry magnitudes–part 1

A few weeks after my paper came out I have received quite unexpected but greatly appreciated offer from Anthony to write a summary of the paper for his blog site. The paper’s title is: Should We Worry About the Earth’s Calculated Warming at 0.7OC Over Last the Last 100 Years When the Observed Daily Variations…