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

 


Climate change not so global

Climate change not so global

4 August 2014

Scientists are calling for a better understanding of regional climates, after research into New Zealand's glaciers has revealed climate change in the Northern Hemisphere does not directly affect the climate in the Southern Hemisphere.

The University of Queensland study showed that future climate changes may impact differently in the two hemispheres, meaning a generalised global approach isn’t the solution to climate issues.

UQ School of Geography, Planning and Environmental Management Head Professor Jamie Shulmeistersaid the study provided evidence for the late survival of significant glaciers in the mountains of New Zealand at the end of the last ice age – a time when other ice areas were retreating.

“This study reverses previous findings which suggested that New Zealand's glaciers disappeared at the same time as ice in the Northern Hemisphere,” he said.

“We showed that when the Northern Hemisphere started to warm at the end of the last ice age, New Zealand glaciers were unaffected.

“These glaciers began to retreat several thousand years later, when changes in the Southern Ocean led to increased carbon dioxide emissions and warming.

”This indicates that future climate change may impact differently in the two hemispheres and that changes in the Southern Ocean are likely to be critical for Australia and New Zealand.”

The study used exposure dating of moraines - mounds of rocks formed by glaciers - to reconstruct the rate of ice retreat in New Zealand’s Ashburton Valley after the last glacial maximum – the time when the ice sheets were at their largest.

The researchers found that the period from the last glacial maximum to the end of the ice age was longer in New Zealand than in the Northern Hemisphere.

They also found that the maximum glacier extent in New Zealand occurred several thousand years before the maximum in the Northern Hemisphere, demonstrating that growth of the northern ice sheets did not cause expansion of New Zealand glaciers.

“New Zealand glaciers responded largely to local changes in the Southern Ocean, rather than changes in the Northern Hemisphere as was previously believed,” Professor Shulmeister said.

“This study highlights the need to understand regional climate rather than a global one-size-fits-all.”

The research was conducted in collaboration with the University of Griefswald, Germany, the Australian Nuclear Science and Technology Organisation, and the University of Canterbury, New Zealand, and published in the Proceedings of the National Academy of Science in July.

ENDS

© Scoop Media

 
 
 
 
 
Business Headlines | Sci-Tech Headlines

 

Future Brighter Money: RBNZ Releases New Bank Note Designs

New Zealand’s banknotes are getting brighter and better, with the Reserve Bank today unveiling more vibrant and secure banknote designs which will progressively enter circulation later next year. More>>

ALSO:

Commerce: Supermarket Inquiry Finds No Breaches By Countdown

The Commerce Commission inquiry into anti-competitive behaviour by Countdown supermarkets, alleged by former Labour Party MP Shane Jones, has found nothing to warrant prosecution, although it warns supermarkets to take care in the way they communicate... More>>

ALSO:

Crown Accounts: English Flags ‘Challenge’ To Budget Surplus

Finance Minister Bill English is warning next month’s half yearly fiscal and economic update from the Treasury may not forecast a budget surplus, saying that returning the government’s accounts to surplus in 2015 will be “a challenge”, given the decline in commodity prices and weak global inflation. More>>

ALSO:

March 2015: Netflix To Launch In Australia And New Zealand

World’s Leading Internet Television Network to Offer Original Series, Movies, Documentaries, Stand-Up Comedy Specials and TV Shows for Low Monthly Price More>>

ALSO:

Price Of Cheese (Is Up): Dairy Product Prices Fall To Five-Year Low

Dairy product prices fell in the latest GlobalDairyTrade auction to the lowest level in more than five years, led by declines in rennet casein and skim milk powder. More>>

ALSO:

Gordon Campbell: On The Australians Scoring Trade Points Against Us With The Chinese

It hasn’t been a great year for Trade Minister Tim Groser... To top it off, Australia has just signed a FTA with China that has far better provisions on dairy exports than what New Zealand currently enjoys in our own FTA with China. More>>

ALSO:

Iwi & Local Consultation: Oil And Gas Block Offer 2015 Begins

Energy and Resources Minister Simon Bridges today announced the start of the Block Offer 2015 process for awarding oil and gas exploration permits. More>>

Industrial Action: Stats NZ Throwing Public Money Away Duplicating Data

The Public Service Association (PSA) says Statistics NZ are throwing money away by collecting the same data twice for official statistics such as the Consumer Price Index... As part of the ongoing industrial action, field interviewers who are PSA members are continuing to collect data, but are not sending it through to Statistics NZ. More>>

ALSO:

Other Stats:

Space: Rosetta's 'Philae' Makes Historic First Landing On A Comet

After more than a decade traveling through space, a robotic lander built by the European Space Agency has made the first-ever soft landing of a spacecraft on a comet. More>>

ALSO:

Get More From Scoop

 
 
Standards New Zealand

Standards New Zealand
 
 
 
 
 
 
 
 
Sci-Tech
Search Scoop  
 
 
Powered by Vodafone
NZ independent news