Trois trous dans la banquise inquiètent les scientifiques

Le 14 avril dernier des chercheurs de la NASA survolaient la mer de Beaufort au Nord du Canada dans le cadre de l’opération IceBridge, le prolongement d’une mission initiée en 2013 pour observer les zones négligées de la banquise. L’apparition de ces cavités dans la glace avait déj� été repérée il y a 5 ans.

Mais aujourd’hui la question se pose � nouveau et inquiète un peu tout le monde. Soit il s’agit de trous créés par les phoque. Ok, pourquoi pas. Soit il s’agit du phénomène de convection, une hypothèse de la NASA qui s’explique par les eaux peu profondes dans la région : "Il pourrait donc s'agir de sources d'eaux chaudes provenant des montagnes qui viendraient se manifester", explique Chris Schuman, glaciologue de l’Université du Maryland. Ce qui n’est pas plus rassurant, si ?

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