This study aims to determine the effects of freezing and thawing processes on the wet aggregate stability of Turkish soils formed from different parent materials, for different aggregate size groups, soil moisture contents at the time of freezing
, number of freezing and thawing cycles and freezing temperatures.
Simulation of freezing-thawing cycles in a permafrost microcosm for assessing microbial methane production under extreme conditions
Arctic Region ; Biogenic process ; Cold area ; Freeze-thaw cycle ; Humid environment ; Micro-organism ; Periglacial features ; Permafrost ; Russia ; Simulation ; West Siberia
The AA. describe a new technique for the simulation of natural freezing-thawing cycles of the active layer in a permafrost microcosm. The core temperature, moisture and methane concentration and release in different depths of the microcosm can
be measured continuously under controlled freezing and thawing conditions. The simulation experiment provides an insight into the activity of microorganisms and turnover rates under various cryogenic conditions (i.e. frozen, partly frozen, unfrozen). The data
Application of differential global positioning systems to monitor frost heave and thaw settlement in tundra environments
This paper describes the methodology employed to resolve vertical changes associated with frost heave and thaw settlement in northern Alaska, at Prudhoe Bay, using differential global positioning systems (DGPS) technology. Traditional profile
This study examines the relationship between vegetation and soil characteristics in an active thaw pond complex on Seward Peninsula in order to determine the mechanistic relationship between thermokarst formation and vegetation change at the forest
-tundra boundary. In particular, the AA. address 2 questions : what is the relationship between active-layer thickness, soil drainage, and vegetation? what are the temporal dynamics of tree colonization and mortality in this thaw-pond complex?
Antarctica ; Chemical erosion ; Cold area ; Comparative study ; Freeze-thaw cycle ; Freezing ; Insolation ; Lithology ; Moisture ; Northern hemisphere ; Salt ; Weathering
This paper reviews some of the literature on rock weathering in both the Northern Hemisphere and the Antarctic, with a particular emphasis on the processes involved and their relationship to climate and rock properties. The role of freeze-thaw
Vegetation-soil-thaw-depth-relationships along a low-arctic bioclimate gradient, Alaska : synthesis of information from the ATLAS studies
Active layer ; Alaska ; Arctic Region ; Bioclimatology ; Biomass ; Climatic warming ; Cold area ; Ecosystem ; Permafrost ; Soil properties ; Thawing ; Tundra ; Vegetation ; Vegetation index
The AA. examine how vegetation, soils, and thaw depth vary across the arctic bioclimate gradient in northern Alaska. One objective is to determine if the patterns of vegetation and active layers observed in the Kuparuk River basin could reasonably
The use of tomographic geoelectrical measurements for the detection of ground ice occurrences in mountainous regions is evaluated. Because isolated ground ice occurences in a warming climate may be subject to rapid thawing, they present a future
hazard in the context of thawing-permafrost-induced landslides and rockfalls. The method is applied to various types of permafrost occurences in the European Alps. The influence of topography, measurement geometry and different inversion parameters