Explorers begin trek to discover melt rate of Arctic sea-ice

March 2nd, 2009 - 1:40 pm ICT by ANI  

London, March 2 (ANI): A British exploration team has begun a grueling trek to the North Pole to discover how quickly the Arctic sea-ice is melting. According to a report by BBC News, for the trek, renowned Arctic explorer Pen Hadow and two companions were dropped onto the Antarctic ice by plane 800km (500 miles) off the northern coast of Canada on February 28. During their 1,000km journey, the team plans to take measurements of the thickness of the ice. It will be the most detailed survey of its kind this season, and should be completed in late May. Satellites have shown how the area of Arctic sea-ice has been shrinking in recent years, but this expedition should give scientists a better idea of how thin the ice is becoming. The sea-ice is widely believed to be melting at an increased rate because of warmer air temperatures above the ice and because of warmer waters below it. The major scientific institutions and agencies that study the Arctic attribute the changes to global warming. If, as scientists tell us, the ice is thinning quickly, then it should set alarm bells ringing around the world. Only a few years ago, researchers predicted that by the end of this century, the Arctic could be free of ice in summer. Some now say that could come far sooner. Hadow, and the other members of the British Catlin Arctic Survey group, Ann Daniels and Martin Hartley will attempt to gather important new data about the state of the ice in winter and early spring - when the ice reaches its greatest extent. It is intended to give scientists the very latest “ground truth”, to better constrain their models and their interpretation of the observations coming from satellites. Arctic ice modeller Professor Wieslaw Maslowski, a science adviser to the survey, hopes the data will enable him to refine his forecast of when the first ice-free summer might arrive. Currently, he has it down for 2013, but with an uncertainty range between 2010 and 2016. According to Hadow, this expedition, which could last up to 100 days, would be about science and discovery. The team will be trekking for up to 12 hours a day for 100 days. “We”re making the surface journey because that’’s the only way we have of gathering these direct observations of how thick the snow and the ice is. That’’s what the scientists really need to know,” said Hadow. (ANI)

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