Arctic treeline advance not as fast as previously believed, finds study by Cambridge University
'The relationship between climate change and tree growth is more complicated than initially thought' -- 'The tree line is definitely moving north on average but we do not see any evidence for rates as big as 2 kilometers per year anywhere along the Arctic rim...In some places, the tree line is actually moving south. The predictions of a loss of 40 percent of the tundra by the end of the century is probably far too alarming'
