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River metals linked to tar sand extraction

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Researchers find that pollutants in Canada’s Athabasca River are not from natural sources. Oil-mining operations in Canada’s main tar sands region are releasing a range of heavy and toxic metals — including mercury, arsenic and lead — into a nearby river and its watershed, according to a new study. Research published online yesterday in the Proceedings of the National Academy of Sciences shows that 13 elements classified as priority pollutants (PPEs) by the US Environmental Protection Agency were found in the Athabasca River in the province of Alberta1. Seven of these were present at high enough concentrations to put aquatic … Read more…

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Canada picks site for Arctic Research Station

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Cambridge Bay location offers a wealth of opportunities for studying the far north. After months of deliberation, the Canadian government has chosen Cambridge Bay — a hamlet midway along the Northwest Passage in the country’s far north — as the site for a world-class Arctic research station. Once built, the station will house scientists all year round, giving them a modern space to study Arctic issues, including climate change and natural resources. It will host conference facilities and laboratories for research on marine biology and geophysics, provide ecologists with the space to do long-term ecological monitoring in aquaria and greenhouses, … Read more…

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Sewer studies based on leaky science

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Questionable sampling techniques have led to murky conclusions about the contents of waste water. Chemicals flushing into sewer systems have been in the news for years. From opiates and hormones to heart medications, studies have detected a range of pollutants. Tests of sewage from hospitals have uncovered antibiotics, and investigations of sewage systems have exposed widespread illicit drug use in cities worldwide. But now a group of water-management scientists claim that some of these studies may be making exaggerated claims, producing dramatic variation in concentration estimates or not detecting substances because of fundamental flaws in sampling protocols. Christoph Ort, an … Read more…

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Arctic Ocean full up with carbon dioxide

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Loss of sea ice is unlikely to enable Arctic waters to mop up more carbon dioxide from the air. As climate scientists watched the Arctic’s sea-ice cover shrink year after year, they thought there might be a silver lining: an ice-free Arctic Ocean could soak up large amounts of CO2 from the atmosphere, slowing down the accumulation of greenhouse gases and climate change. But research published in Science today suggests that part of the Arctic Ocean has already mopped up so much CO2 that it could have almost reached its limit1. Wei-Jun Cai, a biogeochemist at the University of Georgia … Read more…

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Report maps perils of warming

Posted by Hannah

Degree-by-degree breakdown of climate effects published. As the US Senate gears up to debate the latest incarnation of proposed climate legislation next week, a blue-ribbon panel has released what it hopes will be a definitive guide to the consequences of climate change for lawmakers and the public. In offering a degree-by-degree breakdown of the potential impacts of temperature change, the report aims to highlight the effects of stabilizing greenhouse gases at a chosen target level. Yet few are optimistic that the report will influence the fate of the scaled-back climate bill, which would cap emissions from electricity utility companies. The … Read more…