Climate change and permafrost thaw alter greenhouse gas emissions in northern wetlands
...nd wetlands that are rooted, literally, in melting permafrost in many northern ecosystems. But rising atmospheric temperatures are accelerating rates of permafrost thaw in northern regions, says MSU researcher Merritt Turetsky. In the report, The Disappearance o...Global warming is evaporating Arctic ponds, new study shows
...arctic lakes have recently disappeared because the permafrost that formed a largely waterproof barrier has melted, this is not the case here, say Drs. Smol and Douglas. Instead, the high Arctic ponds are evaporating due to warming. By measuring changes in water quality over their 24-year sampling window, they h...Specialized, bone-crushing wolves of Alaska disappeared long ago
...d skeletal remains of the animals from Pleistocene permafrost deposits of eastern Beringia and examined their chemical composition and genetic makeup. Remarkably, they discovered that the late-Pleistocene wolves were distinct from existing wolves, both genetically and in terms of their physical characteristic...Ice Age extinction claimed highly carnivorous Alaskan wolves
...ndrial DNA from the fossil wolf bones preserved in permafrost and compared the sequences, called haplotypes, with those of modern-day wolves in Alaska and throughout the world. The fossils showed a wide range of haplotypesgreater in fact than their modern counterpartbut there was no overlap with modern wolves. ...AAAS releases video and first board consensus statement on climate change
... and gone somewhere else," Tocktoo said. "With the permafrost nowadays, we bury our fish and food very shallow because the sun is so hot, the sun might heat up the sand and then spoil all our food. That's what I'm worried about." Weyiouanna said that hunting and fishing seasons have changed, too, because of...DNA gives new perspectives to understand the mysteries of nature
...nd by bringing back earth samples drilled from the permafrost of Siberia and Canada, the team is able to find ancient DNA material from the animals and the plants that used to live in the area thousands of years ago. In order to detect the types of DNA material in a sample, the researchers are normally using a ...Architectural plan revealed of doomsday arctic seed vault
...in late winter 2008. "By investing in a global permafrost safety facility for seeds, the Norwegian Governmen...-4C and -6C (24.8F and 21.2F). They found that the permafrost would warm much more slowly than the air. In addition, the deeper into the mountain, the colder it ...Alaska graduate receives nation's top dissertation honor
... of land surfaces which occurs when the underlying permafrost melts. Her data demonstrated that North Siberian thaw lakes are a significantly larger source of methane than previously recognized and are largely fueled by thermokarst. Walter's results suggest an important positive feedback to global warming and a...Bacteria that use radiated water as food
...e environments, such as in groundwater beneath the permafrost on Mars. "We know surprisingly little about the origin, evolution and limits for life on Earth," said IUB biogeochemist Lisa Pratt, who led IU Bloomington's contribution to the project. "Scientists are just beginning to study the diverse organisms l...USGS presents a world of science at GSA in Philadelphia
...or example, exist beneath the sea floor and Arctic permafrost areas and contain an estimated volume of carbon that is twice that of all other fossil fuels on earth combined. But extracting gas from gas hydrates is challenging because hydrates are unstable at surface temperatures and pressures. Gas hydrates, ...Shrinking ponds signal warmer, dryer Alaska
...ing climate with longer growing seasons, increased permafrost thawing, an increase in water loss due to evaporat...st the semi-arid, subarctic sites of discontinuous permafrost in Interior Alaska, the authors also selected a study area in the Arctic Coastal Plain where the tem...Alaska study offers strategies to mitigate climate warming
...utbreaks, lowered regional water tables, increased permafrost thaw and subsequent thermokarsts, which contribute to the failure of roads, homes and other infrastructure. "We took stock of these changes and from that we assessed what society is going to need to respond to these changes," said Gary Kofinas, ...Symposium 'Environmental Change in Siberia -- Insights From Earth Observation and Modeling'
...ts of greenhouse gases are currently locked in the permafrost and in organic soils, and if released could accele...phere, and large-scale changes like the melting of permafrost or an increase in extreme forest fire years could potentially accelerate global climate change." A...Ecological change, climate variation addressed at international conference, September 20-24
...he unseen melt: Geochemical evidence of increasing permafrost thaw in the Arctic Despite evidence of Arctic wa...a ice, many measurements show a surprising lack of permafrost melting in soils there.These measurements of the maximum depth of summer thaw in soils are tradition...Siberian lakes burp 'time-bomb' greenhouse gas
... and 63 percent. Walter studied a unique type of permafrost in Siberia, called yedoma, which contains an estim...ant material. "This material has been locked up in permafrost since the end of the last ice age," Walter said. "Now it is being released into the bottom of lakes,...UA strengthens commitment to Arctic research
...ing everything from arctic tree line seedlings and permafrost to lake sediments and sea ice. UA President Mark...in Potsdam, Germany Research: The degradation of permafrost in the arctic due to climate change, using remote sensing, spatial data analysis and other methods ...Discovery of genetic mutation in Florida beach mice suggests extinct mammoth had light and dark fur
...-year-old bone of a wooly mammoth preserved in the permafrost of Siberia. Because the variations occur in the same nucleotide used by the Florida beach mice to alter their coat color, the University of Leipzig scientists say, populations of mammoths during the last Ice Age were likely composed of dark- and ligh...Scientists to employ Arctic ice and polar bears to protect diversity of world's crops
...tory of last-resort in the Arctic ice; carved into permafrost and rock, it will eventually house the seeds of ev...new variation as it arises naturally. Enveloped by permafrost and rock, the samples will remain frozen even if electricity fails. Samples held in "black boxes" wi...Thawing soil in permafrost a significant source of carbon
...of soil called loess contained deep within thawing permafrost may be releasing significant, and previously unacc...ervoirs. "The unique aspect of the Siberian loess permafrost is that it is quite deep 20 to 40 meters - and has a surprisingly high carbon concentration at dept...From Europa to the lab, a new recipe for oxygen on icy moons
...sufficient heat, oxygen could be produced from the permafrost surfaces for use, in Europa's case, by whatever life forms that might inhabit oceans trapped beneath. The standard explanation is that abundant high-energy particles from space--protons, ultraviolet photons, electrons--break the molecular bonds that ...