Recently, the series of datasets produced by the National Science and Technology Basic Resource Survey Special Project "Survey of Permafrost Baseline and Freeze-Thaw Disasters in High-Latitude Northeast China," undertaken by the research team led by Professor Li Guoyu from the Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, have been released and shared on the National Cryosphere Desert Data Center (https://www.ncdc.ac.cn). Researchers are warmly welcomed to access and utilize the data.

  The high-latitude permafrost region in Northeast China is the largest soil organic carbon pool in the region and serves as a critical ecological barrier. It is also a key hub connecting transportation routes and oil and gas pipelines among China, Mongolia, and Russia. Due to permafrost degradation, significant changes have occurred in the region's water conservation functions, forest and wetland ecosystems, and carbon cycling processes, with engineering frost damage being particularly prominent. Investigating the baseline permafrost data and the distribution and characteristics of freeze-thaw disasters in this region holds significant scientific and practical importance in these fields.

  This survey project has produced a total of 46 datasets, focusing on typical basins on the eastern and western slopes of the Greater Khingan Range and the entire permafrost region of Northeast China. The datasets cover multiple time series from 2010 to 2025 and spatial scales ranging from 30 m to 1 km, encompassing comprehensive field measurements and spatial thematic data on permafrost. They include electromagnetic and radar field surveys, as well as in-situ borehole ground temperature observations, supplemented by detailed thematic mapping of permafrost depth, thickness, temperature, and ground ice储量 (ground ice storage). The datasets also integrate ecological baseline data such as topography, land use, vegetation, soil, and stratigraphic thermal properties. Additionally, they incorporate ground temperature monitoring data from key engineering projects along highways, railways, and oil and gas pipelines, along with results from freeze-thaw disaster zoning, risk assessment, engineering frost damage, and ground stability evaluations. Complementary auxiliary background data on meteorology, population, and long-term temperature series are also provided, along with field survey logs and comprehensive assessment reports on permafrost engineering. These datasets comprehensively support research and practical applications in cold region permafrost mechanisms, eco-hydrological modeling, disaster prevention and mitigation for linear engineering projects, and regional safety planning in permafrost areas.