The emails appear to be genuine, but the University of East Anglia said the “sheer volume of material” meant it was not yet able to confirm that they were. One of the emailers, the climate scientist Prof Michael Mann, has confirmed that he believes they are his messages. The lack of any emails post-dating the 2009 release suggests that they were obtained at the same time, but held back. . . .
One marked difference from the original 2009 release is that the person or persons responsible has included a message headed “background and context” which, for the first time, gives an insight into their motivations. Following some bullet-pointed quotes such as “Over 2.5 billion people live on less than $2 a day” and, “Nations must invest $37 trillion in energy technologies by 2030 to stabilise greenhouse gas emissions at sustainable levels,” the message states:
“Today’s decisions should be based on all the information we can get, not on hiding the decline. This archive contains some 5.000 emails picked from keyword searches. A few remarks and redactions are marked with triple brackets. The rest, some 220.000, are encrypted for various reasons. We are not planning to publicly release the passphrase. We could not read every one, but tried to cover the most relevant topics.”