News | Technology
28 Jun 2017 2:00
NZCity News
NZCity CalculatorReturn to NZCity

  • Start Page
  • Personalise
  • Sport
  • Weather
  • Olympic Games
  • Ski Report
  • Finance
  • Shopping
  • Jobs
  • Horoscopes
  • Lotto Results
  • Photo Gallery
  • Site Gallery
  • TVNow
  • Dating
  • SearchNZ
  • NZSearch
  • Crime.co.nz
  • RugbyLeague
  • Make Home
  • About NZCity
  • Contact NZCity
  • Your Privacy
  • Advertising
  • Login
  • Join for Free

  •   Home > News > Technology

    NZ glacier advance linked to cold years

    A 25-year period during which some New Zealand glaciers grew bigger, in contrast to the worldwide trend, has been put down to a series of unusually cold years.


    A period where some of New Zealand's glaciers grew bigger, while those worldwide were shrinking, was likely to have been due to a series of unusually of cold years, according to new research.

    At least 58 New Zealand glaciers advanced between 1983 and 2008, with Franz Josef Glacier doing so almost continuously during this time.

    Increased rainfall has previously been thought to be the reason.

    But a study by Victoria University and Niwa scientists has found that regional climate variability was the likely explanation.

    Lead author Associate Professor Andrew Mackintosh says the anomaly between what was happening in New Zealand and the trend overseas hadn't been satisfactory explained.

    "So this physics-based study used computer models for the first time to look into it in detail," he said.

    "We found that lower temperature caused the glaciers to advance, rather than increased precipitation as previously thought."

    Assoc Prof Mackintosh said the reduced temperature was significant enough for the glaciers to grow bigger again in spite of human-induced climate change.

    He said the study, published in the scientific journal Nature Communications, found New Zealand glaciers that advanced had certain characteristics, including specific elevation and geometry.

    Franz Josef Glacier regained almost half of the total length it had lost in the 20th century.

    However, Tasman Glacier, New Zealand's largest and which has about a third of all of the country's ice volume, continued to retreat.

    Because of that, New Zealand glaciers lost mass overall over the period.

    Assoc Prof Mackintosh said that, although glaciers advancing sounded promising, the future didn't look good.

    Since 2008, Franz Josef Glacier had already retreated more than 1.5km.


    NZN




    © 2017 NZN, NZCity


     Other Technology News
     26 Jun: NZ shares rise in light volume trade
     25 Jun: Moeraki Boulders gets speed control
     24 Jun: All Blacks app launches for Lions test
     21 Jun: Doctors back med students' loan complaint
     19 Jun: Medical student loans 'abysmal': lobby
     17 Jun: Internet Party leader based in Russia
     14 Jun: E3 2017: A new Xbox, some VR goodies and Nintendo wasn't afraid to get weird
     Top Stories

    RUGBY RUGBY
    Foster sticks up for under-fire 'Gatty' More...


    BUSINESS BUSINESS
    Kiwifruit industry to create 29,000 jobs More...



     Today's News

    Rugby League:
    Knights throw SKD a lifeline 21:57

    Entertainment:
    Charlie Sheen is being sued for allegedly exposing an ex-lover to HIV 21:36

    International:
    PNG election: Port Moresby official arrested hours after voting suspended in capital 21:27

    International:
    What led to Uber's CEO Travis Kalanick stepping down? 21:27

    International:
    Islamic State: The US volunteer saving civilian lives on the frontlines 21:27

    Law and Order:
    Search fails to locate Southland fisherman 21:17

    Entertainment:
    Sheryl Crow finds dating "hard work" 21:06

    Entertainment:
    'Orange is the New Black' star Taylor Schilling rarely gets recognised in public 20:36

    Entertainment:
    Paris Jackson has gotten a tattoo in tribute to her late father 20:06

    Entertainment:
    Liam Gallagher says his brother Noel's ego is "out of control" 19:36


     News Search






    Power Search


    © 2017 New Zealand City Ltd