Category Archives: maths

Uncertainties In Global Temperature Data – At Least 0.5C – Jan 2014

Graphs of global temperatures in media rarely show uncertainties yet no measurement is completely accurate,   ±0.5C uncertainty is a plausible minimum uncertainty for monthly average temperatures.  UK Met Office say there has been a rise in temperature of 0.8C … Continue reading

Posted in Climate Change, maths, statistics, Temperature | Tagged , , , , , | 1 Comment

A Great Free Online Tool For Drawing Graphs

This is a short plug for mathworksheetsgo.com free online graphing calculator which is a great tool for exploring graphs of various functions. You start with this form. Add one or more lines by clicking  on buttons to the right Click … Continue reading

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Trainee Teachers Can’t Count

The Daily Mail has a report today saying that one fifth of trainee teachers can not spell or do sums. One apparently took 37 resits before passing a maths test. Presumably the point of the article is to create a … Continue reading

Posted in arithmetic, maths | 1 Comment

Media Reports Claim BEST Group Find Climate Change Is Real

The Guardian and the Economist are among the media reporting on a press release from the Berkeley Earth Surface Temperature Group (BEST) lead by Professor Richard Muller. They report results of BEST’s analysis of temperature records which show the world … Continue reading

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A Very Bad Way To Calculate Sea Level Rise

I have been intrigued by these graphs of sea level rise which the UK Environment Agency (EA) used to display on this page of their website, although the page was removed some time around 13 October 2011. http://www.environment-agency.gov.uk/cy/ymchwil/llyfrgell/data/34449.aspx It was … Continue reading

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Prediction Using Fitted Functions Can Be Very Wrong

I have made several posts about sea levels and salt marsh in Kirby le Soken. This post was prompted when I read a report about an earlier attempt to recreate salt marsh by breaching a sea wall at Tollesbury (google … Continue reading

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Are Sea Levels Rising – You Can Check Using Simple Arithmetic

It is commonly reported that sea levels are going to rise by over a meter in this century. DEFRA in the UK issued predictions in 2006 that sea levels will rise as Period Rate of Sea Level Rise mm/year Total … Continue reading

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