"We had good reason to make adjustments; no

you can't see the data!"
Reeling from claims that it has massaged data to show a 150 year warming trend where there isn't one, NIWA's chief climate scientist David Wratt, an IPCC vice-chair on the 2007 AR4 report, issued a news release stating adjustments had been made to compensate for changes in sensor locations over the years.

While such an adjustment is valid, it needs to be fully explained so other scientists can test the reasonableness of the adjustment.

Wratt is refusing to release data his organisation claims to have justifying adjustments on other weather stations, meaning the science cannot be reviewed. However, he has released information relating to Wellington temperature readings, and they make for interesting reading.