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...climate scientists don't have all the answers, as they will freely and frequently admit, and even when researchers uncover a new piece of data, it isn't always clear what it means. That's very much the case with a new paper about methane emissions, published Thursday in Science. Based on a series of expeditions to the margins of the Arctic Ocean by ship and helicopter, University of Alaska researcher Natalia Shakhova and her colleagues report that methane, a greenhouse gas that is 30 times more effective in trapping heat in the atmosphere than carbon dioxide, is bubbling...
...problem is that nobody has ever taken such careful measurements in this part of the world before, says Heimann. We have satellites that do a remarkable job of observing methane emissions from land, he says, but they're not very accurate over water. So while he considers Shakhova's data absolutely convincing, he's less convinced that these emissions are necessarily new. "In the context of the global methane cycle, has this been accelerating recently, or has it been going on for some time?" Heimann says. "It may be related to recent Arctic warming, but I don't know...
...scientists a solid baseline against which they can measure changes in methane over the coming years to see if it really is increasing. It's also a perfect example of how climate science actually works, as opposed to the cartoon version bandied about by activists and politicians: you take data, acknowledge any uncertainties about exactly what it means, then go out and take more data to narrow those uncertainties. That's exactly why human-triggered global warming was widely acknowledged to be mostly theoretical a few decades ago - and why it's considered a scientific fact today...
...high (25.6 m) wave that appeared out of nowhere, and in 2000, a British oceanographic vessel recorded a 95-ft.-high (29 m) wave off the coast of Scotland. In 2004, scientists from the European Space Agency (ESA), as part of the MaxWave project, used satellite data to show that freak waves higher than 10 stories were rare but did occur on the oceans...
Rather than relying on such underestimates, the Produce Safety Project study used CDC data showing that there are 76 million new cases of foodborne illness in the U.S. each year. Study author Robert Scharff, a professor at Ohio State University and a former FDA economist, then tried to account for the overall cost of illness, factoring in every expense, from onetime costs for prescription medication to losses in "quality of life" - a dollars-and-cents picture of exactly how miserable that bout with a bad falafel made you. "The study really illustrates just how serious foodborne illness...