Video | Business Headlines | Internet | Science | Scientific Ethics | Technology | Search


Adjustments cast doubt on NIWA methods

Climate Conversation Group
30 November 2009
in association with the New Zealand Climate Science Coalition (NZCSC)

Hokitika weather station adjustments cast doubt on NIWA methods

Following the dramatic release of a revealing comparison between two sets of NIWA temperature records in a research project by members of the Climate Conversation Group and the New Zealand Climate Science Coalition, the researchers now show their methods.

Spokesman for the group, Richard Treadgold, said that this first “Supplementary Information” paper shows how an examination of the Hokitika station casts strong doubt on NIWA’s description last week of adjustments they made to the Wellington record.

“In the case of Wellington, NIWA decided that the 0.8ºC drop between Thorndon and Kelburn was justified because of the height difference and the relationship, based purely on similar height, between Thorndon and Wellington Airport.

“However, as many people have pointed out, you can’t make that assumption. Here we have a station almost at sea level (Hokitika South) reading (during the overlap period in the 1960s) on average 0.3ºC colder than the other one that’s 120 feet (39 metres) higher up (Hokitika Aero). So the altitude reasoning doesn’t always work.

Until NIWA release their actual adjustments, we’re speculating, since there could be valid reasons for all this. But it does look very strange at the moment,” said Mr Treadgold.

The full story is posted at the Climate Conversation Group web site, at



© Scoop Media

Business Headlines | Sci-Tech Headlines


Digitl: Bumper year ahead for NZ IT sector

Gartner says New Zealand spending on technology products and services will grow 7.4 percent this year. The company’s latest forecast says the market will total NZ$15.3 billion in 2022... More>>

Fonterra: Lifts Forecast Farmgate Milk Price Range

Fonterra Co-operative Group today lifted its 2021/22 forecast Farmgate Milk Price range to NZD $8.90 - $9.50 per kgMS, up from NZD $8.40 - $9.00 per kgMS. This increases the midpoint of the range, which farmers are paid off... More>>

Federated Farmers: NAIT Levy Increases Must Achieve Accurate, User-friendly System
Nobody welcomes extra costs but if OSPRI is to catch-up on under investment in the NAIT platform and deliver on its workability and farmer support, levy increases are probably necessary, Federated Farmers says... More>>

Skoltech: Study Probes Earth’s Turbulent Past To Explain Where Oceans Came From

The origin of water on our planet is a hot question: Water has immense implications for plate tectonics, climate, the origin of life on Earth, and potential habitability of other Earth-like planets. In a recent study in Physical Review Letters, a Skoltech professor and his Chinese colleagues suggest... More>>

Statistics: Household Net Worth Grows In The September 2021 Quarter But At A Slower Pace Compared To March 2021

Household net worth grew by $60.7 billion in the September 2021 quarter compared with the June 2021 quarter, Stats NZ said today. This represents an increase of 2.5 percent, a similar result to the June 2021 quarter, which was up $60.6 billion or 2.6 percent... More>>

TradeMe: Job Market Ends 2021 On A High With Record Number Of Vacancies
The New Zealand job market finished 2021 on a high note, with the ball still firmly in the job hunters’ court, according to the analysis of 69,600 vacancies listed on Trade Me Jobs for the quarter ending 31 December (Q4)... More>>