Desertification and its relationship with permafrost degradation in Qinghai-Xizang (Tibet) plateau
نویسندگان
چکیده
Desertification in Qinghai-Xizang (Tibet) Plateau is part of Chinese desertification. In the past decades, due to the climate warming, the climate condition in Qinghai-Xizang (Tibet) Plateau has been relatively dry. This has resulted in permafrost degradation and other environmental problems. In addition, the vegetation and the soil layer were also destroyed by unreasonable economic activities. Cultivated and grassland lands have become deserted. Nowadays, the desertification is still expending. In this paper, the factors affecting the desertification in Qinghai-Xizang (Tibet) Plateau were examined, and the desertification as well as its relationship with permafrost degradation was also discussed. D 2004 Elsevier B.V. All rights reserved.
منابع مشابه
Changes in frozen ground in the Source Area of the Yellow River on the Qinghai--Tibet Plateau, China, and their eco-environmental impacts
The Source Area of the Yellow River is located in the mosaic transition zones of seasonally frozen ground, and discontinuous and continuous permafrost on the northeastern Qinghai–Tibet Plateau. Vertically, permafrost is attached or detached from frost action. The latter can be further divided into shallow (depth to the permafrost table 8 m), deep (>8 m) and two-layer permafrost. Since the 1980s...
متن کاملKey evidence of the role of desertification in protecting the underlying permafrost in the Qinghai–Tibet Plateau
Previous research has shown that the temperature of underlying permafrost decreases after the ground surface is covered with sand. No significant conclusions have yet been drawn that explain why this happens, because the heat transfer mechanism effects of the sand layer on the underlying permafrost remain unclear. These mechanisms were studied in the present work. We found that the upward short...
متن کاملResponses of Permafrost on the Qinghai-Tibet Plateau, China, to Climate Change and Engineering Construction
Monitoring of permafrost along the Qinghai-Tibet (Xizang) Highway shows that there is a large difference in the response of permafrost to climate change and to engineering construction. The change in cold (,21.5uC) permafrost is greater than that in warm ($21.5uC) permafrost under the effect of climate change, while the cold permafrost is less sensitive to the disturbances from engineering acti...
متن کاملVegetation Changes along the Qinghai-Tibet Plateau Engineering Corridor Since 2000 Induced by Climate Change and Human Activities
The Qinghai-Tibet (QT) Plateau Engineering Corridor is located in the hinterland of the QT Plateau, which is highly sensitive to global climate change. Climate change causes permafrost degradation, which subsequently affects vegetation growth. This study focused on the vegetation dynamics and their relationships with climate change and human activities in the region surrounding the QT Plateau E...
متن کاملResearch on the Information Extraction of Periglacial Geomorphology in Qinghai-tibet Plateau
Takes Qinghai-Tibet Plateau as a research field, this paper based on the models and algorithms, completes the numerical information extraction of periglacial geomorphology distribution by using SRTM-DEM and annual mean temperature data. Based on the extracted results and remote sensing images, the periglacial geomorphology distribution in Qinghai-Tibet Plateau is achieved by visual interpretati...
متن کامل