【摘要】 青康公路沿线多年冻土主要分布于河卡南山、鄂拉山、巴颜喀拉山地及花石峡至玛多间的低山丘陵区，呈断续分布，总长共３３０ｋｍ。其分布特征主要受海拔高度控制，但又具有纬度地带性，局地因素同时也起作用。公路沿线冻土退化和冻土环境变化的迹象明显。更多还原

【Abstract】 The Qing-Kang Highway (national highway No. 214 ) starts from Xining, Qinghai Province, and passes through the capital of Yushu Zang Autonomous Profecture to Angian County southward. It will pass over the Tanggula Mountain and connect with Hei-Changdu Highway in the Tibet Autonomous Region southward in near future. Permafrost along the Qing-Kang Highway is discontinuously distributed over Hekanan Mountain, Ela Mountain, Bayankala Mountain, and the low mountains and hills between Huashixia and Maduo. The regional differences of precipitation, air temperature, natural landscape, etc. are obvious along the highway. There are the obvious regionalization and vertical zonation of distribution and thickness of permafrost due to the synthetical effect of topography, elevation, latitude, climate, and other factors. Under the global warming background, air temperature in the Qinghai-Xizang Plateau raised for 0. 2 - 0. 4℃ in 1980s than that in 1970s, which makes the isolated masses of permafrost in the eastern part of the plateau occur a regional retrogressive tendency. The indication of permafrost retrogression and environmental changes are obvious along the highway.更多还原