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The team trekked more than 269 miles over 73 days but were unable to make it to the North Pole because of extreme weather, with temperatures dropping below minus-40C. Speaking on a satellite phone while waiting to be airlifted away, Mr Hadow, 47, from Hexworthy on Dartmoor, said the results made for shocking reading.
His team, including Ann Daniels from Whimple in East Devon, found ice sheets were only half as thick as scientists previously believed – in places they measure just 1.77m. He warned some ice could disappear altogether as early as this summer. The alarming findings will add to scientists' fears the planet is finally succumbing to effects of global warming. Experts have long predicted a rapidly melting ice cap could accelerate the release of the greenhouse gas methane into the atmosphere as the permafrost thaws. This in turn could speed up the global warming process – melting more ice.
Scientists had indicated the team would come across older ice which was expected to be around three metres thick. However, Mr Hadow revealed the survey team "hardly ever" came across layers of ice more than a year old during their 73 days. He said the thickness of the ice seemed to suggest it was all "first year ice".
"Our science advisers had told us to expect thicker, older ice on at least part of the route, so it is something of a mystery where that older ice has gone," he said. "It'll be interesting to see what scientists think about this. "The top line indications suggested by the data show that the sea ice on the Arctic Ocean is unlikely to survive as a year-round permanent feature.
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http://www.thisiswesternmorningnews.co.uk/news/POLAR-ICE-CAP-CRITICAL-POINT/article-991466-detail/article.html