je.st
news
Tag: permafrost
Runaway global warming becomes concern permafrost melts
2015-11-20 12:44:00| Climate Ark Climate Change & Global Warming Newsfeed
ClimateWire: In a fragile landscape where footsteps leave an imprint for years, Jennifer Baltzer stood and surveyed the surrounding bog of green sphagnum moss. Black spruce trees tilted here and there like drunkards. Using a metal rod, Baltzer, an ecologist with Wilfrid Laurier University in Waterloo, Ontario, pierced the ground near a spruce. "You are jamming into ice there," she said. Without that freeze, the unstable spruce trees would entirely lose their footing and drown. Goose Lake is at the knife's...
Tags: global
concern
warming
global warming
Research links tundra fires, thawing permafrost
2015-11-11 22:02:00| Climate Ark Climate Change & Global Warming Newsfeed
ScienceDaily: Wildfires on Arctic tundra can contribute to widespread permafrost thaw much like blazes in forested areas, according to a study published in the most recent issue of the online journal Scientific Reports. The project, led by the U.S. Geological Survey, examined the effects of the massive Anaktuvuk River fire, which burned roughly 1,000 square kilometers of tundra on Alaska's North Slope in 2007. Using aerial data, researchers detected permafrost thaw in about a third of the fire's footprint, compared...
Tags: links
research
fires
tundra
Key properties of methane hydrates found in permafrost and on continental shelf illuminated
2015-11-02 03:44:00| Climate Ark Climate Change & Global Warming Newsfeed
PhysOrg: Methane hydrates are a kind of ice that contains methane, and that form at certain depths under the sea or buried in permafrost. They can also form in pipelines that transport oil and gas, leading to clogging. Yet methane hydrates are nearly impossible to study because it is very hard to get samples, and the samples themselves are highly unstable in the laboratory. A team of scientists from Norway, China and the Netherlands has now shown how the size of grains of the molecules that make up the...
Tags: found
key
properties
continental
Global warming unlocking carbon stores long-locked in permafrost
2015-10-28 15:00:00| Climate Ark Climate Change & Global Warming Newsfeed
Christian Science Monitor: For thousands of years, a large percentage of the worlds carbon stores have been safely locked in permafrost, the frozen layer of soil and organic matter that covers much of the planets northernmost latitudes. But as temperatures rise and some permafrost melts, that carbon is being released into the atmosphere as carbon dioxide at an alarming rate. For some ancient permafrost, about half its carbon could decompose in just one week after a thaw, according to a new study by the US Geological Survey,...
Tags: global
stores
warming
carbon
Methane release from melting permafrost could trigger dangerous global warming
2015-10-13 12:00:00| Climate Ark Climate Change & Global Warming Newsfeed
Guardian: While most attention has been given to carbon dioxide, it isnt the only greenhouse gas that scientists are worried about. Carbon dioxide is the most important human-emitted greenhouse gas, but methane has also increased in the atmosphere and it adds to our concerns. While methane is not currently as important as carbon dioxide, it has a hidden danger. Molecule for molecule, methane traps more heat than carbon dioxide; approximately 30 times more, depending on the time frame under consideration....
Tags: global
release
dangerous
warming
Sites : [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] next »