The ground thermal regime and permafrost warming at two upland, sloping, and undisturbed sites, Kunlun Mountain, Qinghai-Tibet Plateau

2019 ◽  
Vol 167 ◽  
pp. 102862 ◽  
Author(s):  
Jing Luo ◽  
Zhanju Lin ◽  
Guoan Yin ◽  
Fujun Niu ◽  
Minghao Liu ◽  
...  
Keyword(s):  
Thermal Regime ◽  
Tibet Plateau ◽  
Kunlun Mountain ◽  
Permafrost Warming ◽  
Qinghai Tibet Plateau

Geohazards and thermal regime analysis of oil pipeline along the Qinghai–Tibet Plateau Engineering Corridor

2016 ◽  
Vol 83 (1) ◽  
pp. 193-209 ◽  
Author(s):  
Wenbing Yu ◽  
Fenglei Han ◽  
Weibo Liu ◽  
Stuart A. Harris
Keyword(s):  
Thermal Regime ◽  
Tibet Plateau ◽  
Oil Pipeline ◽  
Qinghai Tibet Plateau ◽  
Regime Analysis

scholarly journals Effects of stratified active layers on high-altitude permafrost warming: a case study on the Qinghai–Tibet Plateau

2016 ◽  
Vol 10 (4) ◽  
pp. 1591-1603 ◽  
Author(s):  
Xicai Pan ◽  
Yanping Li ◽  
Qihao Yu ◽  
Xiaogang Shi ◽  
Daqing Yang ◽  
...  
Keyword(s):  
Thermal State ◽  
Variable Thermal Conductivity ◽  
Tibet Plateau ◽  
Precipitation Pattern ◽  
Thermal Dynamics ◽  
Temperature And Precipitation ◽  
Active Layers ◽  
Permafrost Warming ◽  
Soil Hydraulic ◽  
Qinghai Tibet Plateau

Abstract. Seasonally variable thermal conductivity in active layers is one important factor that controls the thermal state of permafrost. The common assumption is that this conductivity is considerably lower in the thawed than in the frozen state, λt/λf < 1. Using a 9-year dataset from the Qinghai–Tibet Plateau (QTP) in conjunction with the GEOtop model, we demonstrate that the ratio λt/λf may approach or even exceed 1. This can happen in thick (> 1.5 m) active layers with strong seasonal total water content changes in the regions with summer-monsoon-dominated precipitation pattern. The conductivity ratio can be further increased by typical soil architectures that may lead to a dry interlayer. The unique pattern of soil hydraulic and thermal dynamics in the active layer can be one important contributor for the rapid permafrost warming at the study site. These findings suggest that, given the increase in air temperature and precipitation, soil hydraulic properties, particularly soil architecture in those thick active layers must be properly taken into account in permafrost models.

Impacts of grassland vegetation cover on the active-layer thermal regime, northeast Qinghai-Tibet Plateau, China

2010 ◽  
Vol 21 (4) ◽  
pp. 335-344 ◽  
Author(s):  
Genxu Wang ◽  
Lin'an Liu ◽  
Guangsheng Liu ◽  
Hongchang Hu ◽  
Taibin Li
Keyword(s):  
Active Layer ◽  
Thermal Regime ◽  
Vegetation Cover ◽  
Tibet Plateau ◽  
Grassland Vegetation ◽  
Qinghai Tibet Plateau
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