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Latest Permafrost Stories

2baf93b95ccaf0a3a4a02fb7acafa276
2010-12-06 05:55:00

According to a study released on Sunday, global warming is driving forest fires in northern latitudes to burn more frequently and fiercely. The study found that increased intensity of fires in Alaska over the last decade has changed the region from a sink to a source of carbon dioxide, which is the greenhouse gas most responsible for global warming. Boreal forests in the northern hemisphere may now soak up less of the heat-trapping gas than they give off now. The majority of the CO2 comes...

c0c33ac1fcf370d1411aed6772a9daac1
2010-10-22 06:15:00

Climate scientists at the U.S. National Oceanic and Atmospheric Administration (NOAA) reported Thursday that Arctic temperatures are on the rise again. The sea ice extent has also fallen to one of the lowest levels on record, according to NOAA's annual Arctic report card, which was prepared this year by 69 researchers in eight countries. "A return to previous Arctic conditions is unlikely," wrote the scientists in the report. "Record temperatures across Canadian Arctic and Greenland, a...

06c8f500005026f75da845ac956306cb
2010-08-04 09:31:14

Permafrost warming continues throughout a wide swath of the Northern Hemisphere, according to a team of scientists assembled during the recent International Polar Year. Their extensive findings, published in the April-June 2010 edition of Permafrost and Periglacial Processes, describe the thermal state of high-latitude permafrost during the International Polar Year, 2007-2009. Vladimir Romanovsky, a professor with the snow, ice and permafrost group at the University of Alaska Fairbanks...

b9a1b5522036753208745d74e06c3f7d1
2010-06-28 07:36:15

Scientists at the Department of Energy's Oak Ridge National Laboratory are planning a large-scale, long-term ecosystem experiment to test the effects of global warming on the icy layers of arctic permafrost. While ORNL researchers have conducted extensive studies on the impact of climate change in temperate regions like East Tennessee, less is known about the impact global warming could have on arctic regions. "We're beginning to take these lessons learned and start applying them to sensitive...

49e0cd95e47740185267995cb9a91d581
2010-06-21 14:10:00

A baby mammoth named Khoma unearthed by archaeologists in northern Siberia just last year is being sent on its way to Paris to be analyzed. This project may open another window on a distant past that is all too unfamiliar -- what life was like for creatures of that time and the environment they shared with early humans.  Bernard Buigues, a French expert on herbivores who works in close collaboration with Russian authorities, said that Khoma is the oldest of six baby mammoths found in...

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...

04f753725d51444eeef7dafac72912ed
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...

cc326be885efa0f52ba19f487b696683
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,...

0592c336d83904a73c6239c8f8e39a2d1
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,...


Word of the Day
cruet
  • A vial or small glass bottle, especially one for holding vinegar, oil, etc.; a caster for liquids.
This word is Middle English in origin, and ultimately comes from the Old French, diminutive of 'crue,' flask.
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