-
Article
Evaluating model of frozen soil environment change under engineering actions
The change of frozen soil environment is evaluated by permafrost thermal stability, thermal thaw sensibility and surface landscape stability and the quantitatively evaluating model of frozen soil environment i...
-
Article
Interaction study of permafrost and highway along Qinghai-**zang Highway
Eight monitoring sites are set along the Qinghai-**zang Highway (QXH) to investigate the characteristics and process of interaction between permafrost and highway, including the upper and down boundaries of ac...
-
Article
Impact of permafrost change on the Qinghai-Tibet Railroad engineering
Permafrost along the Qinghai-Tibet Railroad produces the great change under the influence of climate change, such as the decreasing of permafrost table, the rising of permafrost temperatures, etc. Climate effe...
-
Article
Impacts of permafrost changes on alpine ecosystem in Qinghai-Tibet Plateau
Alpine cold ecosystem with permafrost environment is quite sensitive to climatic changes and the changes in permafrost can significantly affect the alpine ecosystem. The vegetation coverage, grassland biomass ...
-
Article
Cooling mechanism of embankment with block stone interlayer in Qinghai-Tibet railway
In order to study the cooling mechanism of embankment with block stone interlayer under open and closed conditions, an experimental railway section was built and data within one freeze-thaw cycle were collecte...
-
Article
Innovative designs of permafrost roadbed for the Qinghai-Tibet Railway
Under global warming scenarios, the passive method of simply increasing the thermal resistance by raising the embankment height and using insulating materials has been proven ineffective in warm and ice-rich p...
-
Article
Processes and modes of permafrost degradation on the Qinghai-Tibet Plateau
Climate warming must lead the mainly air temperature controlled permafrost to degrade. Based on the numerical simulation, the process of permafrost degradation can be divided into five stages, i.e., starting s...
-
Article
The influence of degradation of the swamp and alpine meadows on CH4 and CO2 fluxes on the Qinghai-Tibetan Plateau
CH4 and CO2 fluxes from a high-cold swamp meadow and an alpine meadow on the Qinghai-Tibetan Plateau, subject to different degrees of degradation, were measured over a 12-month period. Air temperature, soil tempe...
-
Article
Thermal hazards zonation and permafrost change over the Qinghai–Tibet Plateau
The Qinghai–Tibet Plateau is the largest permafrost region at low latitude in the world. Climate warming may lead to permafrost temperature rise, ground ice thawing and permafrost degradation, thus inducing th...
-
Article
Open AccessCorrelation of alpine vegetation degradation and soil nutrient status of permafrost in the source regions of the Yangtze River, China
The impacts of alpine vegetation degradation on the main soil nutrients in the permafrost were studied by the comparative analysis of typical plots in the source regions of the Yangtze River. It is found that ...
-
Article
Open AccessDeep-sequencing transcriptome analysis of chilling tolerance mechanisms of a subnival alpine plant, Chorispora bungeana
The plant tolerance mechanisms to low temperature have been studied extensively in the model plant Arabidopsis at the transcriptional level. However, few studies were carried out in plants with strong inherite...
-
Article
Open AccessPermafrost changes and engineering stability in Qinghai-**zang Plateau
Climate change and engineering activities are the leading causes of permafrost temperature increase, active layer thickening, and ground-ice thaw, which trigger changes in the engineering stability of embankme...
-
Article
Annual soil CO2 efflux in a wet meadow during active layer freeze–thaw changes on the Qinghai-Tibet Plateau
Soil CO2 efflux from an ecosystem responds to the active layer thawing depth (H) significantly. A Li-8100 system was used to monitor the CO2 exchange from a wet meadow ecosystem during a freeze–thaw cycle of the ...
-
Article
The effect of permafrost changes on embankment stability along the Qinghai–**zang Railway
After construction of the Qinghai–**zang Railway, the resultant heat exchange between soil and atmosphere caused changes in the thermal and mechanical stability of permafrost beneath the railway embankment. Mo...
-
Article
Spatiotemporal characteristics of freezing and thawing of the active layer in the source areas of the Yellow River (SAYR)
Based on the analysis of data on temperatures and moisture of soils in the active layer at four different permafrost sites in the source areas of the Yellow River (SAYR) in 2010–2012, the freeze–thaw processes...
-
Article
The effect and implication of human disturbances on altitudinal variation of non-structural carbohydrates in Kobresia pygmaea
Non-structural carbohydrates in plant organs can mirror the plant overall carbon supply status and balance and can also provide evidence for their health evaluation in the ecosystem. Non-structural carbohydra...
-
Article
Period analysis and trend forecast for soil temperature in the Qinghai-**zang Highway by wavelet transformation
Soil temperature is a key factor in engineering design, construction and operation involved in permafrost engineering, and is closely associated with engineering stability. Here, the study shows that the wavel...
-
Article
Evolutions of water stable isotopes and the contributions of cryosphere to the alpine river on the Tibetan Plateau
The significant changes of cryosphere on the Tibetan Plateau (TP) are an important cause of concern for the huge population in Asia which depends on the glacier-permafrost feed rivers. Up to now, little is kno...
-
Article
Radiation and energy balance characteristics of asphalt pavement in permafrost regions
Solar radiation and energy balance between the atmosphere and asphalt pavement directly affect the heat absorption of the pavement, resulting in a temperature increase and possible thawing of the permafrost be...
-
Article
Recent changes in the active layer thickness across the northern hemisphere
To better understand the ecological and hydrological responses to climatic and cryospheric changes, the spatiotemporal variations in the active layer thickness (ALT) need to be scrupulously studied. Based on m...
