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PERMAFROST THERMAL REGIME AT NORTH AND SOUTH ASPECTS, KUNLUN MOUNTAIN, QINGHAI-TIBET PLATEAU
Session: Permafrost and Cold Regions Geotechnology / Pergélisol et géotechnologie des régions froides
Zhanju Lin, State Key Laboratory of Frozen Soil Engineering, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences (China)
Fujun Niu, State Key Laboratory of Frozen Soil Engineering, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences (China)
Jing Luo, State Key Laboratory of Frozen Soil Engineering, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences (China)
Minghao Liu, State Key Laboratory of Frozen Soil Engineering, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences (China)
Guoan Yin, State Key Laboratory of Frozen Soil Engineering, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences (China)
Ground temperatures from 0.5 to 15 m depth were measured for six years (2008-2013) at south and north aspects in Kunlun Mountain, Qinghai-Tibet Plateau, to characterize the ground thermal regime and determine if the variations in ground temperature were associated with the slope aspect. Climate conditions at north slope close to south slope, but the ground temperatures were greatly diverse. At the near-surface, about 50 cm depth, the mean annual ground surface temperature (Ts) at north slope was approximately 0.6 °C colder than that at south slope, resulting in an 1-m increase in active layer thickness (ALT) at south slope. As a result, the mean annual ground temperature at permafrost top (Tps) was about 1 °C colder at north slope than that at south slope, and 0.2 °C colder of the mean annual ground temperature at 15 m depth (Tg). The significantly different ground temperature showed an important effect of slope aspect to permafrost, especially in shallower layer permafrost
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