Prada Sunglasses White
research."Evaluating climate changes and impacts in terms of their potential magnitude and the likelihood they will occur will help policymakers and communities make informed decisions about how to prepare for or adapt to them," White said.He said scientists now don't know what many of the thresholds are, suggesting that more research and enhanced Burberry Tote Price
Professor James White, of the University of Colorado's Institute of Arctic and Alpine Research and the chair of the National Research Council committee that produced the report, said climate change has increased concern over possible large and rapid changes in the physical climate system, including Earth's atmosphere, land surfaces and oceans."Climate doesn't change in a nice, linear way," he said. "There are thresholds and tipping points in the system. If we cross one of those, handling or adapting to that is going to be a challenge. When it Prada Sunglasses White comes to adaptations, speed kills."Abrupt climate changes and impacts already under way are of immediate concern, the report says. These include the disappearance of late summer Arctic sea ice and increases in extinction rates of marine and terrestrial species.Other scenarios, such as the destabilization of the west Antarctic ice sheet, have potentially major consequences but the probability of these changes occurring within the next century is not well understood, highlighting the need for more Burberry Nubuck Crossbody
monitoring of climate, ecosystems and social systems is needed.Research needs identified by the report include identifying keystone species whose population decline due to an abrupt change would have cascading effects on ecosystems and ultimately on human provisions such as food supply. to get more serious about climate change," he said.He noted that there are security cameras everywhere, monitoring everything from banks to street intersections. Close monitoring of the Earth is just as important, he said."The planet is arguably our most valuable asset," he said. "We need it for clean water, clean air, energy, food. We don't monitor that with the same kind of zeal as we do other places that we think are precious."White said even changes in the physical climate system that happen gradually over many decades or centuries can cause abrupt ecological or socio economic change once a "tipping point" is reached.Relatively slow global sea level rise could directly affect local infrastructure such as roads, airports, pipelines or subway systems if Burberry Card Holders On Sale
a sea wall or levee is breached. And slight increases in ocean acidity or surface temperatures could cross thresholds beyond which many species cannot survive, leading to rapid and irreversible changes in ecosystems that contribute to extinction events.White used the example of the New York subways flooding during Hurricane Sandy. The water that surged through was just a foot higher than its highest previous level, but that was enough to cause flooding."The value of these kinds of reports is that they really can be applied to a small framework like a city or a local scale," said Kristen Averyt, associate director for science at CU's Cooperative Institute for Research in Environmental Sciences.When looking at Boulder county's September floods, for example, she said better information could both provide more advance warning for future floods and address questions of rebuilding, both the timing for rebuilding and how to rebuild.
New report seeks early warning system of abrupt climate change events
Prada Sunglasses White
Burberry Clutch Bag Sale