the original meaning of “areas peripheral to Pleistocene ice sheets and glaciers” (Lozinski 1909) to one which stresses the distinctive processes of freeze-thaw and permafrost formation. In spite of the comment by Worsley (2004) that the term periglacial has no universally accepted definition, there are really only two options that are in common use: a) an environment of frequent freeze-thaw cy...

INTRODUCTION Broadway lies in a region of England that has been strongly affected by successive periods of periglacial conditions, located just below the southern extent of last glacial advances. Broadway contains evidence of relict periglacial features as well as more recent landslide activity. As part of a general study of mass movements in relict periglacial terrains, slope movements at Broa...

Takes Qinghai-Tibet Plateau as a research field, this paper based on the models and algorithms, completes the numerical information extraction of periglacial geomorphology distribution by using SRTM-DEM and annual mean temperature data. Based on the extracted results and remote sensing images, the periglacial geomorphology distribution in Qinghai-Tibet Plateau is achieved by visual interpretati...

A global warming-induced transition from glacial to periglacial processes has been identified in mountainous regions around the world. Degrading permafrost in pristine periglacial environments can produce acid rock drainage (ARD) and cause severe ecological damage in areas underlain by sulfide-bearing bedrock. Limnological and paleolimnological approaches were used to assess and compare ARDs ge...

The microbial process of methane (CH4) production during the back-freezing of permafrost soils in autumn and the future fate of produced CH4 in the thawing phase of the following spring are not well understood. Long-term CH4 flux studies in the Lena Delta (Siberia) indicate that back-stored CH4 adds to the emission of newly-produced CH4 at the beginning of the vegetation period. Further field a...

The main issues about relation between climate and relief in the Romanian geomorphological literature follow three directions of research: the description of Pleistocene glacial and Pleistocene-Holocene periglacial landforms in the Carpathians; the direct analysis of climate?s role in landform development; the integration of separate works and findings in a synthetic morphodynamic system applic...

The west slope of the Blue Ridge mountains in central Virginia is a polygenetic landscape containing interglacial and periglacial features. This paper proposes a general model relating the distribution and origin of hillslope and toeslope Quaternary landforms to climatically influenced geomorphic processes. Two generations of interglacial debris fans in the study area differ in their degree of ...

Sphagnum (spp.) is widely distributed in permafrost regions around the arctic and subarctic. The moisture content of the moss layer affects the thermal insulative capacity and preservation of permafrost. It also controls the growth and collapse history of palsas and other peat mounds, and is relevant, in general terms, to permafrost thaw (therrnokarst). In this study, we test and calibrate seve...

1 Geological Survey of Canada, Natural Resources Canada, Ottawa, Ontario, Canada 2 Geophysical Institute, University of Alaska, Fairbanks, Alaska, USA 3 Department of Geography, University of Ottawa, Ottawa, Ontario, Canada 4 Department of Geography and Environmental Studies, Carleton University, Ottawa, Ontario, Canada 5 Centre d’études nordiques, Université Laval, Québec (QC), Canada 6 United...

In the coastal mountains of Marie Byrd Land, Antarctica, there is a juxtaposition of ice moulded landforms at lower altitudes and upstanding summits with weathered surfaces bearing tors. This paper uses geomorphological mapping and exposure dating to test two hypotheses commonly used to explain such a landscape contrast: either the pattern reflects contrasts in glacial erosion related to the ba...