What about what is happening with the Arctic and the polar bears? It is already happening!!!
Is the Artic the globe?
I like to think of it as a puking sick canary in a coal mine, with copious strings of green bird phlegm hanging from its beak and puddling at its feet, myself.
A 2008 study led by David Lawrence of the National Center for Atmospheric Research (NCAR) concluded:
We find that simulated western Arctic land warming trends during rapid sea ice loss are 3.5 times greater than secular 21st century climate-change trends. The accelerated warming signal penetrates up to 1500 km inland….
In other words, if it continues, the recent trend in sea ice loss may triple overall Arctic warming, causing large emissions in carbon dioxide and methane from the tundra this century (for a review of recent literature on the tundra, see here). Indeed, Lawrence himself said, “Our study suggests that, if sea-ice continues to contract rapidly over the next several years, Arctic land warming and permafrost thaw are likely to accelerate.”
A February study by National Snow and Ice Data Center with conservative assumptions concluded, “Thawing permafrost feedback will turn Arctic from carbon sink to source in the 2020s, releasing 100 billion tons of carbon by 2100.” The paleoclimate record is not reassuring. And the National Science Foundation in 2010 even pointed out, “release of even a fraction of the methane stored in the [Eastern Siberian] shelf could trigger abrupt climate warming.”
Long but excellent read.