نتایج جستجو برای: landforms
تعداد نتایج: 1749 فیلتر نتایج به سال:
Climate-induced changes to permafrost are altering high latitude landscapes in ways that could increase the vulnerability of the vast soil carbon pools of the region. Permafrost thaw is temporally dynamic and spatially heterogeneous because, in addition to the thickening of the active layer, localized thermokarst features form when ice-rich permafrost thaws and the ground subsides. Thermokarst ...
Fields of pits, both large and small, in Tombaugh Regio (Sputnik Planitia, and the Pitted Uplands to the east), and along the scarp of Piri Rupes, are examples of landscapes on Pluto where we conclude that sublimation drives their formation and evolution. Our heuristic modeling closely mimics the form, spacing, and arrangement of a variety of Tombaugh Regio’s pits. Pluto’s sublimation modified ...
Fungal activity is a major driver in the global nitrogen cycle, and mounting evidence suggests that fungal denitrification activity contributes significantly to soil emissions of the greenhouse gas nitrous oxide (N(2)O). The metabolic pathway and oxygen requirement for fungal denitrification are different from those for bacterial denitrification. We hypothesized that the soil N(2)O emission fro...
Oil sands surface mining in Alberta has generated over a billion cubic metres of waste, known as tailings, consisting sands, silts, clays, and process-affected water that contains toxic organic compounds chemical constituents. All these tailings will eventually be reclaimed integrated into one two types mine closure landforms: end pit lakes (EPLs) or terrestrial landforms with wetland feature. ...
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