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 E-Mail IMAGE: The Helheim Glacier is a possible analog for the future behavior of the much larger glaciers on Antarctica. view more  Credit: Knut Christianson AMHERST, Mass. - The world is currently on track to exceed three degrees Celsius of global warming, and new research led by the University of Massachusetts Amherst's Rob DeConto, co-director of the School of Earth & Sustainability, shows that such a scenario would drastically accelerate the pace of sea-level rise by 2100. If the rate of global warming continues on its current trajectory, we will reach a tipping point by 2060,...

ambitiously slash carbon emissions in the coming decades. Sea levels, of course, won’t instantly rise by tens of feet: Miles-thick ice sheets take many centuries to thousands of years to melt. But, critically, humanity is already setting the stage for a relatively quick return to Pliocene climes, or climes at least significantly warmer than now. It’s happening fast. When CO2 naturally increases in the atmosphere, pockets of ancient air preserved in ice show this CO2 rise happens gradually, over thousands of years. But today, carbon dioxide levels are skyrocketing as humans burn lo...