Ice breaks off Canada Arctic shelf | News | Al Jazeera

Ice breaks off Canada Arctic shelf

Chunks measuring almost 20 sq km split off ice shelf, the biggest in three years.

    Scientists say such occurrences are consistent with global warming [AP]

    The two sections measure four to 5 sq km and 14 sq km, officials said.

    Ongoing break-up

    The break-up was the largest of an ice shelf in the Arctic since the Ayles Ice Shelf split off Ellesmere Island in 2005 and formed about 66 sq km in size, or roughly the size of New York city's Manhattan district.
     
    Five vast ice shelves sit on the north side of Ellesmere Island in Canada's Nunavut territory.

    Ward Hunt is considered the largest, with a surface area of 443 sq km.

    The ice shelves, vast plateaus of thick ice floating on the ocean but attached to land, began to form more than 4,000 years ago, scientists say.

    "We ascertained that in the 20th century 90 per cent of the ice surface area [in the region] has been lost," said Derek Mueller, a Polar specialist at Trent University in Peterborough.

    "So, this phenomena has been ongoing on for a long time, but we're now seeing punctuated events," he said.

    A fissure formed at the centre of the Ward Hunt Ice Shelf in 2002, leaving just a small amount of ice connected to Ellesmere Island.

    A new crack measuring 18km long and 40m deep was discovered earlier this year.

    SOURCE: Agencies


    YOU MIGHT ALSO LIKE

    Interactive: Coding like a girl

    Interactive: Coding like a girl

    What obstacles do young women in technology have to overcome to achieve their dreams? Play this retro game to find out.

    America's Guns: Secret Pipeline to Syria

    America's Guns: Secret Pipeline to Syria

    How has the international arms trade exacerbated conflict in the Middle East? People and Power investigates.

    I remember the day … I designed the Nigerian flag

    I remember the day … I designed the Nigerian flag

    In 1959, a year before Nigeria's independence, a 23-year-old student helped colour the country's identity.