Arctic ice thickness 'plummets'
| By Mark Kinver Science and environment reporter, BBC News |
 The data proves that overall volume of sea ice is decreasing, say researchers |
The thickness of Arctic sea ice "plummeted" last winter, thinning by as much as 49 centimetres (1.6ft) in some regions, satellite data has revealed.
A study by UK researchers showed that the ice thickness had been fairly constant for the previous five winters.
The team from University College London added that the results provided the first definitive pr
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