News | Technology
1 Aug 2014 17:43
NZCity News
NZCity CalculatorReturn to NZCity

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

  •   Home > News > Technology

    Atoll grows by 23% in 65 years

    Scientists say a Marshall Islands atoll that grew by 23 per cent in 65 years shows islands can form and grow faster than previously thought.


    A Marshall Islands atoll that grew 23 per cent in 65 years shows islands can form and grow much more rapidly than previously thought.

    And scientists say the research may be significant as sea levels continue to rise thanks to climate change, threatening low-lying atolls.

    In 1905, Nadikdik Atoll in the Marshall Islands was hit by a devastating typhoon which destroyed large sections of the reef island, and killed the entire population except two survivors.

    Scientists from the University of Auckland compared aerial photographs from 1945 with pictures from 2010, and found the vegetated area of the islands grew by 23 per cent.

    The research puts this down to sediments generated from the atoll's surrounding reef system, which was likely in a healthy condition as the atoll had been uninhabited since 1905.

    The scientists also noticed a new island grow from a sediment deposit to a fully vegetated and stable island in 61 years, and a number of separate islands form a single larger island.

    "These changes were rapid and indicate that reef island formation can occur quickly," the report said.

    Sea levels are expected to continue rising thanks to climate change, with the levels around Marshall Islands rising at about 2.2 millimetres a year since 1946.

    The report said there was considerable global interest about the future stability of the landforms given the projected sea level increases.

    Past studies have focused on the immediate impacts of extreme weather events on islands, but comparatively few studies have documented how islands have changed after the impact.

    The report was the first to note the development of new islands.


    NZN




    © 2014 NZN, NZCity


     Other Technology News
     31 Jul: NZ sharemarket closes firmer
     31 Jul: Delay in opening email revealed
     30 Jul: NZ sharemarket closes mixed
     30 Jul: Dotcom told to disclose his assets
     30 Jul: Teacher censured for emailing child images
     29 Jul: NZ stocks fall led by Telecom
     29 Jul: Kiwi launches world-first cheap rocket
     Top Stories

    RUGBY RUGBY
    Robbie Deans backs Crusaders More...


    BUSINESS BUSINESS
    Oji cleared to buy Carter Holt businesses More...



     Today's News

    Business:
    Oji cleared to buy Carter Holt businesses 17:26

    Entertainment:
    Kelly Osbourne accused of letting her dogs poop all over her apartment 17:22

    Living & Travel:
    IBM salesman caught with porn on laptop 16:56

    Entertainment:
    Jason Derulo has praised Robin Thicke's desperate attempts to win back Paula Patton 16:52

    Entertainment:
    Jeff Bridges can't decide whether to relax or work harder as he is getting older 16:22

    Rugby:
    Robbie Deans backs Crusaders 16:16

    Entertainment:
    Alicia Keys is pregnant 15:52

    Business:
    Xero's increased spending 'no surprise' 15:26

    Entertainment:
    Cody Simpson defends Justin Bieber following Orlando Bloom altercation 15:22

    Rugby:
    The one that got away for the 'Tahs 14:56


     News Search






    Power Search


    Click for info on advertising with WebAds
    © 2014 New Zealand City Ltd