Reuters: Arctic summer sea ice is unlikely to shrink drastically in 2008 beyond a record low set last year even though the long-term trend is a thaw tied to global warming, a leading scientist said on Wednesday. Arctic sea ice, an indicator of climate change as it expands in winter and thaws in summer, shrank last September to a low of 4.1 million sq km (1.6 million sq miles), more than 1.2 million sq km less than the previous recorded low in 2005. "My feeling is that the …