Michael Mann came to prominence in the climate science world with his notorious hockey stick graph that did away with the medieval warm period and the little ice age – and it had an incredibly upturned blade leading up to 1998. At that time most of Joe Public were dupes and swallowed this exercise in data manipulation hook line and sinker – and it was used by the IPCC to browbeat the lowbrow politicos. However, some people were older and well read in more sober accounts of past climate – such as those of HH Lamb, and did not swallow the tale. It was just too fishy – and with a little bit of scratching around at the data the hockey stick was found out (by the likes of Andrew Mountford and Steve McIntyre etc).
Well, all that is old hat and it is virtually only the activists that nowadays remain faithful to the hockey stick – and those of a science challenged persuasion. However, Michael Mann has a new wheeze. The AMO (Atlantic Multicadal Oscillation), it has been discovered, peaked in 1998 – at the apogee of the CAGW scare story. The ocean current oscillation has a 60 year cycle – and is now in a downturn. The AMO has proved to be an embarrassment to those pushing the CAGW meme in climate change quarters – and they can hear the loud guffaws in the background it would seem. The comedy is not appreciated, it seems, as Mann has just published a paper that attempts to get rid of the AMO – see www.bishop-hill.net/blog/2014/5/19/the-alternative-mannian-oscillation.html which is derived from a post by another climate scientist, Nic Lewis, a guest blogger at http://climateaudit.org/2014/05/19/manns-new-paper-recharacterizing-the-… … which will be heeded by some and ignored by most.
The role of the AMO somewhat dilutes the CAGW song sheet – which is why they decided to try and do something about it. Apparently, Mann has come back for second helpings – indicating he is confident of his ability to be able to hoodwink the unwary and those tending to trust the climate science rather than checking it out for reality. At http://tallbloke.wordpress.com/2014/05/08/soon-et-al-paper-a-review-of-h… (or go to http://tallbloke.wordpress.com and scroll down to May 18th where you will see the above post) … which is a short post on the paper (but provides the link) but has plenty of comments on the 60 year cycle of AMO.
Meanwhile, Piers Corbyn is not impressed by the braying on the other side of the pond concerning a decline in the West Antarctic ice sheet – go to www.weatheraction.com/docs/WANews14No18.pdf