TY  - Data
T1  - 30m freeze-thaw disaster risk assessment map of the permafrost region in Northeast China (2023-2024)
A1  - JIN Huijun
A1  - Tang Jianjun
A1  - Wang Wenhui
A1  - Jin Xiaoying
A1  - Li Shanzhen
A1  - Huang Shuai
A1  - Chen Dun
A1  - WANG Hongwei
A1  - Yangsui Bridge
A1  - Li Zuwang
A1  - Soaring Swallows
A1  - Cheng Yaohui
A1  - Li Jingtao
A1  - Zhang Ze
A1  - Wang Lifeng
A1  - Zhang Hu
A1  - Liu Mengxin
A1  - Zhang Shengrong
A1  - Yang Xue
A1  - Liu Zirui
A1  - Yue Ziying
A1  - Wu Haibin
A1  - Xing Luning
A1  - Chen Siyu
A1  - Xu Jingyan
A1  - He Zhengyun
A1  - Mi Hongqi
A1  - Peng Wenhao
A1  - Liang Junhe
A1  - Shi Yanling
A1  - Zhou Zhiyi
DO  - 10.12072/ncdc.nieer.db7264.2026
PY  - 2026
DA  - 2026-04-03
PB  - National Cryosphere Desert Data Center
AB  - Unlike the current distribution map, this data constructs a machine learning comprehensive evaluation model that integrates "measured disaster disturbance information" and "potential environmental risk factors", achieving quantitative risk zoning for uninspected road sections and potential high-risk areas. The data is characterized by an instability index (0.0-1.0) to indicate the degree of risk, revealing the spatial coupling relationship between the thermal stability of permafrost, topographical and hydrological conditions, and human engineering disturbances (such as road heat island effect and pipeline active heat source). This achievement provides key data support for risk identification, preventive maintenance, and route planning of linear engineering in cold regions.  The core field of the dataset is the instability index (0-1.0), which is divided into five levels according to the degree of risk:  0-0.20 (extremely stable/low-risk): mainly distributed in the seasonally frozen soil area south of the southern boundary (SLLP).  0.20-0.40 (high stability/low risk): Belongs to weakly sensitive areas, mostly found in mountain ridges with low ground temperature (  0.40-0.60 (moderate stability/moderate risk): Key warning area, mainly distributed in the degradation transition zone between the southern boundary of permafrost in the 1970s and 1990s.  0.60-0.80 (low stability/high risk): The project is located in an unstable zone, adjacent to the main roads of national and provincial highways, and prone to thermal and melting disasters.  0.80-1.00 (extremely low stability/extremely high risk): Key intervention areas, highly focused on transportation hubs along roads (railways, highways), the China Russia crude oil pipeline (CRCOP), and large areas of discontinuous permafrost in the north.
DB  - NCDC
UR  - http://www.ncdc.ac.cn/portal/metadata/ce899e87-0dcb-435f-8cb7-a70ff209a932
ER  -