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

 


NIWA PR Regarding NZ Climate Science Claims

Clarification of NZ Climate Science Coalition claims re NZ temperature trends

The New Zealand Climate Science Coalition yesterday issued a media release claiming that a UK-based research group has calculated a much higher temperature trend for New Zealand over the period 1979 to 2005 than shown by NIWA data. The coalition claims that the Intergovernmental Panel on Climate Change (IPCC) "believes" this higher figure, and that this alleged disagreement amongst experts shows that the science of climate change is "far from settled".

The coalition is not comparing apples with apples.

DETAILS OF THE UK DATASETS

The UK research group referred to by the coalition is the Climatic Research Unit of the University of East Anglia, Norwich, which is led by Dr Phil Jones (the "Jones et al" data).

Jones et al provide several large, complex datasets. These data are averages over squares of 5 degrees latitude by 5 degrees longitude over the globe (so there are only a handful of squares which relate to New Zealand).

There are two key datasets: 1. Land-based data only. The NIWA temperature trends are from land-based climate station measurements, so this land-based dataset is the appropriate one for comparison purposes. The trend from the Jones et al land-based data and from NIWA's land temperature data are in close agreement. The 1979–2005 trend from the NIWA data is 0.25 degrees Celsius. The trend which NIWA scientists have calculated from the Jones et al land-based data is 0.21 degrees Celsius.

2. Synthesised land-based and sea surface temperature data. This appears to be the dataset which the coalition has used, and it includes more ocean area than land area for the New Zealand grid squares. For the period the coalition has chosen (1979–2005), the ocean data shows greater warming than the land data. Using this dataset, we calculate the trend as about 0.6 degrees. This is how the coalition gets a much higher temperature trend.

The ocean temperature is affected by a combination of local conditions and transport of heat from other places. This means that we do not expect the land and ocean temperatures to show the same trends over a period of only a couple of decades.

ACCESS TO NIWA DATA

In their media release, the coalition asks the Minister responsible for climate change issues to "direct NIWA to release its (climate) station data". Warwick Hughes of the coalition already has NIWA's corrected data for each individual station in the New Zealand temperature time series, which we provided to him at no cost. For raw climate data, NIWA charges the marginal cost of supply. We also charge for a value-added service of provision of climate data via the internet. Mr Hughes has been offered access to these services subject to our standard rates, terms, and conditions.

ENDS


© Scoop Media

 
 
 
 
 
Business Headlines | Sci-Tech Headlines

 

Wine: 20% Of Marlborough Storage Tanks Damaged By Quake

An estimated 20 percent of wine storage tanks in the Marlborough region, the country’s largest wine producing area, have been damaged by the impact of the recent Kaikoura earthquake. More>>

ALSO:

ACC: Levy Recommendations For 2017 – 2019 Period

• For car owners, a 13% reduction in the average Motor Vehicle levy • For businesses, a 10% reduction in the average Work levy, and changes to workplace safety incentive products • For employees, due to an increase in claims volumes and costs, a 3% increase in the Earners’ levy. More>>

Women's Affairs: Government Accepts Recommendations On Pay Equity

The Government will update the Equal Pay Act and amend the Employment Relations Act to implement recommendations of the Joint Working Group on Pay Equity. More>>

ALSO:

Immigration: Increase In Seasonal Workers For RSE

The current cap will be increased by 1,000 from 9,500 to 10,500 RSE workers for the 2016-17 season. Mr Woodhouse says the horticulture and viticulture industry is New Zealand’s fourth largest export industry, producing almost $5 billion in exports. More>>

ALSO:

Hurunui: Crown Irrigation Invests Up To $3.4m In North Canterbury

Crown Irrigation Investments will invest up to $3.4m in the Hurunui Water Project, an irrigation scheme that will be capable of irrigating up to 21,000 hectares on the south side of the Hurunui River in North Canterbury. More>>

ALSO:

Not So Great:Butterfly Eradication Success

The invasive pest great white butterfly has been eradicated from New Zealand in a world-first achievement, Primary Industries Minister Nathan Guy and Conservation Minister Maggie Barry say. More>>

Gordon Campbell: On The Government’s Tax Cuts Fixation

Long before the earthquake hit, the dodginess of the government tax cuts programnme was evident in the language of its packaging. It is being touted as a “tax cuts and family care” package... More>>

ALSO:

Get More From Scoop

 
 
 
 
 
 
 
 
Sci-Tech
Search Scoop  
 
 
Powered by Vodafone
NZ independent news