It could also be that Environment Canada has been involved in the manipulation of Canada's
tempertaure data and doesn't want it to be available for comparison.
Steve McIntyre has published allegations — twice now — that an internal IPCC authors» debate about the inclusion of Briffa's tree - ring reconstruction in a key figure from the 2001 WG1 Third Assesement Report was driven by concern about the post-1960 «decline» in tree - ring widths, a decline that showed a marked divergence with the
instrumental tempertaure record.
As far as which setting to use, a chart printed in the instruction booklet lists estimated warming time, although it is still recommended that you test
the tempertaure of the milk before feeding.