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Latest Permafrost Stories

92460a6ff5fa798b43cd2ec2d53eef091
2010-05-06 09:57:58

Among the worrisome environmental effects of global warming is the thawing of Arctic permafrost---soil that normally remains at or below the freezing point for at least a two-year period and often much longer. Monitoring changes in permafrost is difficult with current methods, but a study by University of Michigan researchers offers a new approach to assessing the extent of the problem. The new study approach, which relies on chemical tracers in stream water, is described in the journal...

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2010-04-05 10:48:01

A study showed on Sunday that thawing permafrost could release laughing gas, which is a contributor to climate change that has been overlooked in the Arctic, according to a recent Reuters report. The study, which was reported in the journal Nature Geoscience, showed that emissions of nitrous oxide surged under certain conditions from melting permafrost that underlies around 25 percent of land in the Northern Hemisphere. Emissions of the gas leapt 20 times from thawing wetlands in Zackenberg...

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2010-03-05 09:30:00

Thawing by climate change of subsea layer of permafrost may release stores of underlying, seabed methane A section of the Arctic Ocean seafloor that holds vast stores of frozen methane is showing signs of instability and widespread venting of the powerful greenhouse gas, according to the findings of an international research team led by University of Alaska Fairbanks scientists Natalia Shakhova and Igor Semiletov. The research results, published in the March 5 edition of the journal Science,...

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2010-02-17 08:30:00

The southern limit of permanently frozen ground, or permafrost, is now 130 kilometers further north than it was 50 years ago in the James Bay region, according to two researchers from the Department of Biology at Universit© Laval. In a recent issue of the scientific journal Permafrost and Periglacial Processes, Serge Payette and Simon Thibault suggest that, if the trend continues, permafrost in the region will completely disappear in the near future. The researchers measured the retreat...

51dc76514ce8241cb82352a93e6d8ae71
2010-01-11 09:30:33

The increase in temperature in the Arctic has already caused the sea-ice there to melt. According to research conducted by the University of Gothenburg, if the Arctic tundra also melts, vast amounts of organic material will be carried by the rivers straight into the Arctic Ocean, resulting in additional emissions of carbon dioxide. Several Russian rivers enter the Arctic Ocean particularly in the Laptev Sea north of Siberia. One of the main rivers flowing into the Laptev Sea is the Lena,...

179487b9175ed4b2d5daf24f75ed43d01
2009-10-15 07:38:56

New study shows that Arctic has potential to alter Earth's climate In a new study in the journal Ecological Monographs, ecologists estimate that Arctic lands and oceans are responsible for up to 25 percent of the global net sink of atmospheric carbon dioxide. Under current predictions of global warming, this Arctic sink could be diminished or reversed, potentially accelerating predicted rates of climate change. In their review paper, David McGuire of the U.S. Geological Survey and the...

8fd67dafcb7c39c0140ec2010624dedc1
2009-08-31 10:35:00

Researchers are warning of a slow seepage of methane gas from under the Arctic permafrost, which could be very dangerous to the Earth's future climate. "On a calm day, you can see 20 or more 'seeps' out across this lake," Canadian researcher Rob Bowen told the Associated Press from his boat on the Mackenzie River Delta. Bowen said it is essentially pure methane bubbling up from the surface, which spells trouble for the earth's climate, experts say. Temperatures in the Arctic have increased by...

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2009-08-05 15:20:00

Researchers conduct fieldwork to track permafrost melting in Alaska and gain insight about the release of carbon into the atmosphereThe terrain of the North Slope of Alaska is not steep, but Andrew Jacobson still has difficulty as he hikes along the spongy tundra, which is riddled with rocks and masks multitudes of mosquitoes.Jacobson, a professor of earth and planetary sciences at Northwestern University, extracts soil and water samples in search of clues to one of global warming's biggest...

1abefe086a1c707791ba6f6c0f8b984b1
2009-07-23 10:50:00

By comparing clear mountain lakes with brown forest lakes the scientists have been able to show that what controls production in lakes is light. This runs counter to conventional truths in lake research that says that productivity is determined by access to nutrients, such as phosphorous.  "In the brownest lakes sunlight can't penetrate more than about two meters. In clear mountain lakes, the light can reach down to depths of 15-20 meters and lead to high production of algae on lake...

2009-07-09 15:44:17

An Australian-led team of scientists says it has determined the amount of frozen carbon in Earth's northern regions is more than double previous estimates. We now estimate the deposits contain over 1.5 trillion tons of frozen carbon, about twice as much carbon as contained in the atmosphere, said Charles Tarnocai of Agriculture and Agri-Food Canada, the study's lead author. Pep Canadell, executive director of Australia's Global Carbon Project and study co-author, said the existence of...


Word of the Day
holluschickie
  • A 'bachelor seal'; a young male seal which is prevented from mating by its herd's older males (mated bulls defending their territory).
This comes from the Russian word for 'bachelors.'
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