中国1:400万冰川冻土沙漠图
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冻土图的编制依据包括:(1)冻土野外调查、勘探实测资料;(2)航空像片和卫星影像判译;(3)TOPO30 1km分辨率的地面高程数据;(4)气温和地面温度资料。其中,青藏高原的冻土分布采用了南卓铜等(2002)的研究结果,以年平均地温0.5 ℃作为多年冻土与季节冻土的界限,参考《中国冰雪冻土图》(1:400...
The compilation of permafrost maps is based on the following sources: (1) Field surveys, exploration and measured permafrost data; (2) Interpretation of aerial photographs and satellite imagery; (3) TOPO30 ground elevation data with a 1 km spatial resolution; (4) Air temperature and ground surface temperature data. Specifically, for the permafrost distribution on the Qinghai-Tibet Plateau, the research findings from Nan et al. (2002) were adopted, using 0.5 ℃ of annual average ground temperature as the boundary between permafrost and seasonally frozen soil, with reference to *Map of Snow and Frozen Soil in China* (1:400...




