Climate
- Earth
Marine microbes prove potent greenhouse gas emitters
Earth’s oceans emit an estimated 30 percent of the nitrous oxide, or N2O, entering the atmosphere. Yet the source of this potent greenhouse gas has puzzled scientists for years. Bacteria — long the leading candidate — can generate nitrous oxide, but the seas don’t seem to contain enough to account for all of the nitrous oxide that the marine world has been coughing up. Now researchers offer a better candidate.
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- Humans
AAAS board defends climate scientists
“AAAS vigorously opposes attacks on researchers that question their personal and professional integrity or threaten their safety based on displeasure with their scientific conclusions.” This declaration was contained in a 400-word denunciation of attacks on climate scientists and the politicization of climate science that was issued June 29 by the organization's board of directors.
- Humans
It’s time to put a price on carbon, NRC says
“It is imprudent to delay actions that at least begin the process of substantially reducing emissions [of greenhouse gases],” according to a May 12 report by the National Research Council. It didn’t get a lot of press play in the past week, perhaps because its 144 pages don’t say anything readers might not have expected this august body to have proclaimed years ago. But that shouldn’t diminish the significance of this report, its authors contend.
- Earth
Warming dents corn and wheat yields
Rising temperatures have decreased global grain production and may be partly responsible for food price increases.
- Earth
Earth/Environment
How Antarctica got its ice, plus Chinese dust-ups and rising bird malaria in this week’s news.
- Earth
With warming, Arctic is losing ground
Scientists anticipate big ecosystem changes as erosion spills nutrients into the sea
- Earth
Arctic Ocean hosts weird freshwater pond
Odd, persistent winds prevent river inputs from mixing with the sea.
- Humans
Record ‘Arctic’ ozone minimum expands beyond Arctic
In mid-March, our online story about the thinning of stratospheric ozone over the Arctic noted that conditions appeared primed for regional ozone losses to post an all-time record. On April 5, World Meteorological Organization Secretary-General Michel Jarraud announced that Arctic ozone had indeed suffered an unprecedented thinning. And these air masses are on the move to mid-latitudes.
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- Earth
2010 ties record for warmest year yet
El Ni±o heated things up even as global temperatures continue to rise in the hottest decade on record.
- Earth
Climate action could save polar bears
Cutting fossil fuel emissions soon would retain enough sea ice habitat for threatened species, scientists say.
