The e-mail system of one of the world's leading climate research units has been breached by hackers.

E-mails reportedly from the University of East Anglia's Climatic Research Unit (CRU), including personal exchanges, appeared on the internet on Thursday.

A university spokesman confirmed the email system had been hacked and that information was taken and published without permission.

An investigation was underway and the police had been informed, he added.

I’ve attached a cleaned-up and commented version of the matlab code that I wrote for doing the Mann and Jones (2003) composites. I did this knowing that Phil and I are likely to have to respond to more crap criticisms from the idiots in the near future, so best to clean up the code and provide to some of my close colleagues in case they want to test it, etc. Please feel free to use this code for your own internal purposes, but don’t pass it along where it may get into the hands of the wrong people.