Meteorologist Joe D'Aleo rebuttal: "Arctic warming and the melting of the arctic ice are not at all unprecedented (they happen predictably on multidecadal scales with a period of around 60 years) and are in fact entirely natural." ...
"Greenland data suggests the recent warming falls far short of earlier warming periods during the current interglacial and short of the warming early in the 20th century. The Antarctic has cooled and ice has increased in recent years although volcanism near the Antarctic peninsula leads to local water warmth and sea ice melting. Prior to the recent melting, the ice cover reached a long-term record high." ...
"Also we should note that the prescribed melting reported in the Science Journal can’t be claimed a long time record as global ocean data prior to the satellite (1980) and Argo Buoy era (post 2004) is spotty at best. Even if the claims about water released were true, computations show global sea level would rise just 4 inches/century (agreeing with global data) and not the up to 24 feet promised decades ago."
2010 Prediction by UN IPCC's Prof. Richard Alley, a Pennsylvania State University: "Sometime in the next decade we may pass that tipping point which would put us warmer than temperatures that Greenland can survive."
2020 Update: Paul Homewood's analysis: "Since then, however, Greenland’s temperatures have returned to normal, and are no higher than they were in the 1930s. Far from being the start of a new trend, 2010 was simply an outlier:
The Peterman Glacier is still more or less in the same position as it was ten years ago
Greenland’s major glaciers stopped retreating seven years ago
From 80,000 to 12,000 years ago, when CO2 concentrations lingered near or below 200 ppm, many new or recent studies suggest that when directly comparing region to region, it was as much as 6°C warmer than today even during this ice age period. This has prompted some scientists to “exclude atmospheric pCO2 as a direct driver of SST [sea surface temperature] variations”.
Sean Sublette, a meteorologist at Climate Central, who pointed out that the 1960s through 2010s saw between one and three storms each decade before the June 1 start date on average. It might be tempting to ascribe this earlier season entirely to climate change warming the Atlantic. But technology also has a role to play, with more observations along the coast as well as satellites that can spot storms far out to sea.
“I would caution that we can’t just go, ‘hah, the planet’s warming, we’ve had to move the entire season!’” Sublette said. “I don’t think there’s solid ground for attribution of how much of one there is over the other. Weather folks can sit around and debate that for awhile.” Earlier storms don’t necessarily mean more harmful ones, either.