A survey of Antarctic ice shelves has discovered that ice dissolving from underneath accounted for 55 per cent of shelf loss from 2003 to 2008. Ice shelves fringe 75 per cent of Antarctica (Science, June 14th 2013). It turns out that it is sea water, even if it is just above freezing point, that drives ice melt – not the temperature. Ice shelves melt from the bottom before they form ice bergs -see http://phys.org/print290348882.html
Then we have a climate scientist playing with the data – see www.bishop-hill.net/blog/2013/6/14/kevin-trenberth-is-a-very-naughty-boy… and altogether some very slippery work, it seems -see www.bishop-hill.net/blog/2013/6/14/on-the-meaning-of-ensemble-means.html