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22 November 2017 05:54 (South Africa)
Sci-Tech

North Pole ice-free in ten years?

  • Branko Brkic
    branko3048 a ray
    Branko Brkic

    Brkic is the founder and editor of The Daily Maverick.

    He has edited magazines on business and politics, technology, and wildlife. He has also published fiction and non-fiction books, most of them in Serbian. Though he has never pretended to be a reporter, his wide knowledge of politics (especially in America), combined with his experiences in a disintegrating Yugoslavia, gives him an unusual outlook on events in South Africa.

    Despite the vowel-poor surname, he tells anyone who asks that he hails from Hyde Park, Johannesburg, having spent most of his adult life in South Africa.

    Recent columns:

  • Sci-Tech
polar bear

An explorer and his team have returned from the Arctic winter with evidence that sea ice is much thinner than most people guessed. Still, the scientific world can’t seem to agree on the data.

New evidence collected by Arctic explorer Pen Hadow and his team suggests that the Arctic Ocean will be an open body of water by 2020. The results of Hadow’s study, which saw him trek 430 kilometres to the North Pole and take more than 1,500 measurements of the sea ice, were released on Wednesday.

The findings show that most of the ice floes in the northern part of the Beaufort Sea are only around 1,8 metres thick, meaning that it is first-year ice rather than a “multi-year” sheet that has built up over time. The University of Cambridge physics group that analysed the data stated: “"The area is now more likely to become open water each summer, bringing forward the potential date when the summer sea ice will be completely gone.”

The trend is seen by the World Wildlife Fund as “irreversible”, because water absorbs more of the sun’s heat than ice. The feedback loop created by this process speeds up global warming, and is expected by the Cambridge study group to result in an ice-free Arctic Ocean in the northern hemisphere summer of 2020. Weather patterns are also expected to be severely disrupted, as ocean currents change and more greenhouse gases are released into the atmosphere.

But while Hadow’s first-hand samples are taken by many scientists to be more reliable than the satellite and submarine measurements of other studies, the scientific world has come nowhere close to achieving consensus on the issue. As the New York Times reported last week, the latest measurements out of the US’s National Snow and Ice Data Center record a “substantial expansion” of the thickness of second-year ice in the Arctic, which is being interpreted as a reprieve in summer meltdowns.

Read more: Associated Press, Daily Telegraph, New York Times

  • Branko Brkic
    branko3048 a ray
    Branko Brkic

    Brkic is the founder and editor of The Daily Maverick.

    He has edited magazines on business and politics, technology, and wildlife. He has also published fiction and non-fiction books, most of them in Serbian. Though he has never pretended to be a reporter, his wide knowledge of politics (especially in America), combined with his experiences in a disintegrating Yugoslavia, gives him an unusual outlook on events in South Africa.

    Despite the vowel-poor surname, he tells anyone who asks that he hails from Hyde Park, Johannesburg, having spent most of his adult life in South Africa.

    Recent columns:

  • Sci-Tech

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