温暖化への永久凍土の応答(<特集>地球温暖化と異常気象) Response of Permafrost to Recent Global Warming(<Theme>Global Warming and Freak Weather)
Under the recent global warming, the most remarkable increase of temperature tends to occur in Arctic region. Large impact to glacier and sea ice results in large scale thawing. By contrast, widely distributed permafrost in Arctic region does not response to warming and no large scale thawing is observed. The propagation of heat wave into permafrost delays due to its characteristics in thermal regime. High water content layer in upper permafrost impedes the propagation of thawing front into permafrost as to maintain stable condition of active layer.
地盤工学会誌 57(4), 10-13, 2009-04-01