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Politics : Formerly About Advanced Micro Devices -- Ignore unavailable to you. Want to Upgrade?

To: Wharf Rat who wrote (908530)	12/16/2015 2:41:05 AM
From: Wharf Rat	Read Replies (1) \| Respond to of 1575497

"But CO2 emissions are falling!" Climate change impacts will last for decades despite global agreement Doyle Rice, USA TODAY 7:16 p.m. EST December 15, 2015 Many of the harmful effects of global warming will continue to influence Earth's atmosphere and oceans for decades despite the landmark climate agreement nearly 200 countries reached in Paris this weekend. No matter how much emissions are reduced in the years ahead, temperatures will continue to climb, sea levels will continue to rise and oceans will become more acidic around the world over the next several decades, if not centuries, according to analysts. "Much of the carbon dioxide we have put into the atmosphere will be there for hundreds of years, some of it for a thousand years or longer," Penn State meteorologist Michael Mann said. "We’ve committed already to a substantial increase in global temperatures above pre-industrial levels for many centuries." With future heating already locked into the climate system, it's likely global average temperatures — measured as a combination of land and ocean temperatures — will rise as much as 3.6 degrees Fahrenheit by 2100, Niklas Höhne of the NewClimate Institute said at a Monday news conference. However, that increase will be even more pronounced on land, he added. "Temperature increase over land is roughly twice the value than global average," Höhne told USA TODAY. "If we gave 3.6 degrees globally, it is roughly 7.2 degrees over land." As for global sea levels, a 31-inch rise is projected by the end of the century and the ocean will continue to rise for centuries beyond that, Höhne said. "There is increasing evidence we’ve now set in motion the unstoppable collapse of a large part of the west Antarctic ice sheet, enough to give us 10-14 feet of global sea level rise," though that could take centuries, Mann said. Another impact that's locked in: All of the world's coral reefs will be in danger of dying out this century as a result of increasing ocean acidification, Höhne said. While many of these climate impacts will continue for decades, the degree to which they affect the globe remains to be seen. "A great deal will depend on whether countries meet their pledges, and even on the rates at which those targets are reached," meteorologist Robert Henson of Weather Underground said. With adoption of the agreement, the process moves toward getting national legislatures to approve the agreement. Ratification requires approval of at least 55 countries representing 55% of the world’s emissions to sign on before 2020. "It is the long-term commitment that makes acting on climate change now so critical — the decisions we are making today will determine the climate we leave behind for many future generations to come," Mann said. usatoday.com