Sentences with phrase «scale thawing of permafrost»

«Overall, these observations indicate that large - scale thawing of permafrost may already have started.»

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

Not exact matches

Large - scale warming in the Arctic [Johannessen et al., 2004] has resulted in an extension of the length of the summer melt season over sea ice [Smith, 1998; Rigor et al., 2000], thawing permafrost [Osterkamp and Romanovsky, 1999], and near - coastal thinning and overall shrinkage of the Greenland ice sheet [Krabill et al., 1999; Lemke et al., 2007, and references therein].

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.

Under business - as - usual climate forcing scenarios, much of the upper permafrost is projected to thaw within a time scale of about a century (Camill, 2005, Lawrence and Slater, 2005).

Among the effects could be more frequent, extreme weather events and droughts, rapid sea level rise from icecap melting, breakdown of the marine food chain and worst of all, feedback effects like large releases of methane from thawing permafrost, or large scale dieback of forests.