TY  - Data
T1  - Distribution Map of Permafrost on the Qinghai Tibet Plateau Based on Sub regional Survey Maps: Benchmark Map for Regional Permafrost Modeling (2010)
A1  - Zhuotong Nan
DO  - 10.6084/m9.figshare.19642362.v5
PY  - 2025
DA  - 2025-08-29
PB  - National Cryosphere Desert Data Center
AB  - This data adopts a new permafrost mapping method, using satellite derived surface melting and freezing indices as inputs, and a sub regional permafrost map based on surveys as constraints. In 2010, a new permafrost distribution map was created for QTP. This method incorporates empirical soil parameters (whose values are constrained by survey based sub regional permafrost maps through spatial clustering and parameter optimization) into the model, taking into account the influence of local factors and further improving to reduce parameter equivalence. The new map shows that in 2010, the total area of permafrost on the Qinghai Tibet Plateau was approximately 1.086 × 10 ⁶ km ² (accounting for 41.2% of the QTP area), and the seasonal permafrost area was approximately 1.447 × 10 ⁶ km ² (accounting for 54.9%), excluding glaciers and lakes. The validation based on the investigation of the sub regional permafrost map (kappa=0.74) and drilling records (overall accuracy=0.85, kappa=0.43) shows that the accuracy of this map is higher than the other two recent maps. By examining the areas with significant differences between maps, it was confirmed that the distribution of permafrost in this map is more realistic than in the map by Zou et al. (2017). Given its excellent accuracy, the local map can serve as a benchmark map for simulating the land surface of the Qinghai Tibet Plateau, to constrain/validate simulation results, and as a historical reference for predicting future permafrost changes on the plateau in the context of global warming.
DB  - NCDC
UR  - http://www.ncdc.ac.cn/portal/metadata/78c4828a-6734-40fd-99eb-d7253aaf279c
ER  -