We have all seen the news that The New Zealand Climate Science Education Trust, a newly registered arm of the Coalition, has filed a claim in the High Court seeking a declaration to invalidate the NZ Temperature Record, currently promoted by NIWA, and featured on its website.
It is fascinating the the Jones et al global temperature compilations which date from the 1980’s and are the series that fathered “Global Warming” – did NOT incorporate adjustments/corrections anything like those warming tweaks of NIWA.
Now the Jones et al global series ended in 2005 as CRUT2 and from 2006 the UK Met Office took over the data. The UKMO DID introduce warming adjustments/corrections very similar in magnitude to those used by NIWA.
This blog article of mine from 2007 points out the degree of warming over different timespans for two selections of grid cells covering New Zealand – for CRUT2 – CRUT3 (UKMO) and NIWA.
So we see, the very most emminent of experts – simply do not agree. So it may not be that simple for the New Zealand High Court.