Sentences with phrase «while thawing permafrost»

Reductions in sea ice and other changes may affect the amount of Carbon Dioxide absorbed by the Arctic Ocean, while thawing permafrost is expected to increase emissions of methane.

Isn't the methane from the tropical wetlands part of a natural cycle (thus net zero), while the thawed permafrost is a net positive source of methane?

Not exact matches

«We've known for a while now that permafrost is thawing,» said Suzanne Hodgkins, the lead author on the paper and a doctoral student in chemical oceanography at Florida State.

While permafrost thawing or boreal wetlands in high latitudes have values of about -60 ‰, tropical wetlands — such as would be found in those regions — have slightly less negative values, about -52 ‰.

According to Dr. Natali, «Our results show that while permafrost degradation increased carbon uptake during the growing season, in line with decadal trends of «greening» tundra, warming and permafrost thaw also enhanced winter respiration, which doubled annual carbon losses.»

Describing the albedo effect — the phenomenon that explains how lighter substances reflect sunlight while darker items absorb its heat — she said permafrost thaw is also a growing concern.

While climate models all predict permafrost thaw as high northern regions warm, they differ on how severe the impacts are likely to be, the paper explains.

Qualitative indicators like sea ice coverage, spring thaw dates, and melting permafrost provide strong additional evidence that trends have been positive at middle and high northern latitudes, while glacier retreat suggests warming aloft at lower latitudes.

The thawing of permafrost in the region has been linked to global warming.5 Annual average air temperatures rose 1.1 ° F (0.6 ° C) from 1960 to 2005,6,11,12 while permafrost at a depth of 33 feet (10 meters) warmed an average of 0.5 ° -1.3 ° F (0.3 ° -0.7 ° C).6, 12

While anthropogenic warming should accelerate the thawing of offshore permafrost via warming of Arctic Ocean shelf waters, this impact should be considered additive to a broader thawing trend that has been underway for thousands of years.

While such models lack adequate observational datasets of subsurface soil properties and / or geology, it is clear that the time scale for deep permafrost thaw is measured in centuries, not years.

So much more, in fact, that all the carbon absorbed while the permafrost was in a «moderately thawed» state was released back into the environment once the permafrost thawed more extensively.

While Sweden has only a small area of these permafrost peatlands, there are huge swaths in Russia and Canada, and their thawing and gas releases was hoped to be avoided.