Word: warmers
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...much less ice than it does now. Scientists are unsure of how quickly rising temperatures from global warming could destabilize and melt our existing sheets - the working assumption has been that such major melting and subsequent sea-level rise would take centuries, if not longer, even in a warmer world. (See TIME's special report on the environment...
...pines raised in temperatures about 7° Fahrenheit (4° Celsius) above current averages died 28% faster than pines raised in today's climate. It's the first study to isolate the specific impact of temperature on tree mortality during drought - and it indicates that in a warmer world trees are likely to be significantly more vulnerable to the threat of drought than they are today. "This raises some fundamental questions about how climate change is going to affect forests," says David Breshears, a professor at UA's School of Natural Resources and a co-author of the PNAS paper...
...higher levels of atmospheric CO2 that would likely be seen in a warmer future won't make much of a difference either - if the pine needles' pores are closed to prevent water loss, CO2 simply won't get in. Even more worrisome, the PNAS study doesn't take into account possible changes in precipitation patterns in a warmer future, which many climate models say could be drier, exacerbating the impacts of higher temperatures. "We can envision the landscape getting hammered over and over again," says Breshears...
...Data Center say older, thicker sea ice, which once made up 30% to 40% of Arctic sea ice and is less prone to melting, makes up only 9.8% of this year's shrunken ice spread--the lowest level ever. The rest is thinner and more vulnerable to warmer summer temperatures. Researchers estimate that 80% of Arctic ice may melt over the next 30 years and eventually disappear altogether...
...scanner. In a separate study, scientists at Maastricht University Medical Center in the Netherlands also saw upticks in brown-fat activity in subjects who had been chilling in a 16?C (61?F) room for two hours. (PET technicians have also long known that putting patients in warmer rooms tends to keep that bothersome extra activity from showing up on their images...