The Laws of Averages: Part 3, The Average Average

  Guest Essay by Kip Hansen   This essay is the third and last in a series of essays about Averages — their use and misuse.  My interest is in the logical and scientific errors, the informational errors, that can result from what I have playfully coined “The Laws of Averages”. Averages As both the…

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New paper: climate models short on 'physics required for realistic simulation of the Earth system'

I’m pleased to have had a chance to to review this new paper just published in the Journal of Climate: An Evaluation of Decadal Probability Forecasts from State-of-the-Art Climate Models Suckling, Emma B., Leonard A. Smith, 2013: An Evaluation of Decadal Probability Forecasts from State-of-the-Art Climate Models*. J. Climate, 26, 9334–9347. doi: http://dx.doi.org/10.1175/JCLI-D-12-00485.1 The lead…

A hilarious view of Climategate I've never read before

Scientific understanding and faith simultaneously on display:  ‘For climatologists, the search for an irrefutable “sign” of anthropogenic warming has assumed an almost Biblical intensity.’ – Fred Pearce, New Scientist, October 1996 This being near Climategate time, it is worth reflecting upon that heady time in late November 2009 when the world of climate science saw…

Ooops – Met Office decadal model forecast for 2004-2014 falls flat

‘The Pause’ claims another victim. Source: http://www.woodfortrees.org/plot/hadcrut4gl/from:2004/plot/hadcrut4gl/from:2004/trend:2004 Paul Matthews writes: The skillful predictions of climate science Smith et al (2007): 0.3°C in 10 years In 2007, a team of climate scientists from the UK Met Office led by Doug Smith wrote a paper “Improved Surface Temperature Prediction for the Coming Decade from a Global Climate Model”, published…

September doldrums – solar slump continues

While many science related government agencies are shut down (NASA GISS is deemed ‘non-essential’ for example) some remain open due to statements like this: Due to the Federal Government shutdown, NOAA.gov and most associated web sites are unavailable. However, because the information this site provides is necessary to protect life and property, it will be…

National Academy of Sciences: climate models still 'decades away' from being useful

From the National Academy of Sciences report A National Strategy for Advancing Climate Modeling: Computer models that simulate the climate are an integral part of providing climate information, in particular for future changes in the climate. Overall, climate modeling has made enormous progress in the past several decades, but meeting the information needs of users…

Another uncertainty for climate models – different results on different computers using the same code

New peer reviewed paper finds the same global forecast model produces different results when run on different computers Did you ever wonder how spaghetti like this is produced and why there is broad disagreement in the output that increases with time? Graph above by Dr. Roy Spencer Increasing mathematical uncertainty from initial starting conditions is…