A ?major error? has been discovered in the BBC's Climate Change Experiment that uses the computers of 200,000 volunteers around the world.
The Experiment started in February, and asked for computer users around the world to sign up their machines to be used as one giant supercomputer.
However, experts at Oxford University have just discovered that the data they built into the model is flawed.
Project Coordinator Nick Faull, said a file underestimated the levels of man-made sulphate emissions, meaning the model grew hot too quickly.
The BBC's dedicated website noted:
?If you are checking the date of your model regularly, you may notice it return to the year 1920. Many of you have also noticed that your models have been warming up faster than the real world did over the 20th century.
?We'd like to apologise for having to restart all the models. Your efforts so far have not been wasted, but it does mean that the experiment will take longer. We would like to encourage you to keep running the experiment, because your contribution is still just as useful.
?As you would expect, that also means that we will be reporting the results later than the May date we originally planned.?
http://www.bbc.co.uk/sn/hottopics/climatechange/updates1.shtml