Sentences with phrase «thawing of permafrost»

Other impacts, such as those associated with the rapid thawing of permafrost in Alaska, are unique to a particular U.S. region.

Arctic methane emissions were projected to at least double during the 21st century, partly because of an increase in wetlands caused by thawing of permafrost, it said.

The real concern is that climate change may soon causing the large - scale thawing of permafrost around the world; second only in size to tropical rainforests, boreal forests cover a vast swathe of land in the upper latitudes of Alaska, Siberia, China, Scandinavia and the Yukon.

The likelihood of the complete loss of Arctic summer sea ice by 2030, faster melting of the vast Greenland ice sheets, and the rapid and quickening thaw of permafrost regions indicate that the window for arresting climate change before tipping points are reached is rapidly closing.

A series of studies on the National Institute of Health's Arctic Health website documents how the widespread thaw of permafrost is already having direct impacts on people.

In contrast, the warming on the land may increase the protective vegetation layer and delay thawing of permafrost outside of lakes,» said Vladimir Romanovsky of the UAF Geophysical Institute and co-author of the new study.

Warming of arctic soils and thawing of permafrost thus can have substantial consequences for the global climate, as the large C and N stores could be released to the atmosphere as the greenhouse gases carbon dioxide (CO2), methane (CH4) and nitrous oxide (N2O).

It's also pretty likely that global warming would give you substantial thawing of the permafrost and emissions of methane.

«Thawing of permafrost does not mean all permafrost carbon is eventually lost.

They replicated natural seasonal thaws of the upper soils, and the deep and long - term thaw of the permafrost.

So we recently published some work looking at some previously unrepresented effects, like thawing of permafrosts, methane from the wetlands, aerosol interactions.

Polar regions: The seasonal thaw of permafrost will increase by 15 per cent and the overall extent of the permafrost will shrink by about 20 per cent.

Thawing of permafrost peatlands of the Arctic could release so much methane and nitrous oxide that our planet might never recover.

Also included in the computation of the total change are smaller contributions from thawing of permafrost, deposition of sediment, and the ongoing contributions from ice sheets as a result of climate change since the Last Glacial Maximum.

What the authors found is that all three sites — selected for minimal, moderate, and extensive thawing of the permafrost — absorbed carbon during the Arctic summer and emitted carbon during the Arctic winter.

Energy demands and costs; urban air quality; thawing of permafrost soils; tourism and recreation; retail consumption; livelihoods; loss of melt water (7.4.2.1; 7.4.2.2; 7.4.2.4; 7.4.2.5)

Data gathered by existing monitoring networks «indicate that large - scale thawing of permafrost may have already started,» the U.N. report says.

A series of studies on the National Institute of Health's Arctic Health website documents how the widespread thaw of permafrost is already having direct impacts on people.

Further, the group reports that polar snow cover declined 10 percent in 30 years, and the thaw of permafrost will likely creep hundreds of miles northward within this century.

But the thawing of the permafrost in Siberia, Canada and Alaska is just getting started.

There are fears that Arctic warming will worsen wildfires that, in turn, burn through subsurface layers of soil and hasten the thawing of permafrost beneath.

The thawing of permafrost can cause landslides and other sudden land collapses.

A new study by Prof Jason Lowe and Dr Dan Bernie at the UK's Met Office Hadley Centre takes these CMIP5 models and tries to account for additional uncertainties in the carbon budget associated with feedbacks, such as carbon released by thawing of permafrost or methane production from wetlands, as a result of climate change.

Although recent models predict that a small net accumulation of carbon will occur in Arctic tundra during the present century (low confidence), higher methane emissions responding to the thawing of permafrost and an overall increase in wetlands will enhance radiative forcing (medium confidence).

The amount of shrub in the Arctic increases with the rise in global temperatures, a phenomenon that causes the thawing of the permafrost and worsens global warming.

Warming and thawing of permafrost will bring detrimental impacts on community infrastructure (very high confidence).

Kevin Schaefer, a permafrost scientist with the National Snow and Ice Data Center at the University of Colorado in Boulder and an author of the article, calls the thawing of the permafrost a «true climatic tipping point.»

The thawing of permafrost in northern forests could completely alter local ecosystems.

As the world tries to tamp down carbon emissions, a thawing of permafrost — leading to a new emissions source — could undermine progress considerably.

The thawing of the permafrost can therefore worsen climate change.

«The thawing of permafrost on the ocean floor is an ongoing process, likely to be exaggerated by the global warming of the world's oceans.»

The two scientists report in Nature Climate Change that if emissions of greenhouse gases continue to rise as they are doing now, the thaw of the permafrost and the loss of the ice caps could release 1,700 billion metric tons of carbon now locked in as frozen organic matter.

The thawing of permafrost can cause landslides and other sudden land collapses.

He said the thawing of the permafrost could release vast quantities of greenhouse gases into the atmosphere.

We also underestimated the potential importance of strong feedbacks, such as the thawing of the permafrost to release methane, a powerful greenhouse gas, as well as tipping points beyond which some changes in the climate may become effectively irreversible.»

Methane can also be released with the thawing of permafrost, the frozen ground underlying the tundra that covers nearly 9 million square miles in the northern latitudes.