Category Archives: maths

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

Posted on January 6, 2014 by Jeremy

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 , , , , , | Leave a comment

A Great Free Online Tool For Drawing Graphs

Posted on November 17, 2011 by Jeremy

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 →

Posted in maths | Leave a comment

Trainee Teachers Can’t Count

Posted on November 7, 2011 by Jeremy

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 | Leave a comment

Media Reports Claim BEST Group Find Climate Change Is Real

Posted on October 28, 2011 by Jeremy

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 →

Posted in Climate Change, statistics | Leave a comment

A Very Bad Way To Calculate Sea Level Rise

Posted on October 14, 2011 by Jeremy

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 →

Posted in Sea Level, statistics | Leave a comment

Prediction Using Fitted Functions Can Be Very Wrong

Posted on September 7, 2011 by Jeremy

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 →

Posted in EA, maths, Sea Level, SMP | Leave a comment

Are Sea Levels Rising – You Can Check Using Simple Arithmetic

Posted on August 3, 2011 by Jeremy

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 →

Posted in arithmetic, Sea Level | Leave a comment