The widely definition of seasonally frozen ground include seasonally frozen layer (seasonally frozen ground regions) and seasonally thaw layer (active layer in permafrost regions). So the area extent of seasonally frozen ground occupied more than 80% land surface over Northern Hemisphere. Soil freeze/thaw cycle is one special character of seasonally frozen ground, which covers area extent, depth, time duration, variation of soil freeze/thaw. These changes in seasonally frozen ground have substantial impacts on energy, water and carbon exchange between the atmosphere and the land surface, surface and sub-surface hydrologic processes, vegetation growth, the ecosystem, carbon dioxide cycle, agriculture, and engineering constructuion, as a whole.Based on the observations from sites, CRU air temperature, we used the Stefan solution to calculate the spatial distribution of active layer thickness and soil freeze depth during 1971-2000. These results are helpful to further study the physical mechanism between seasonally frozen ground and climate change, eco-hydrology process.

File naming and required software

File name: the active layer thickness is stored in grid data format, and the file name is alt_ Qilian_ PF.tif ALT is the thickness of active layer, Qilian_ PF is permafrost region of Qilian Mountain
The freezing depth is stored in grid data format, and the file name is MFP_ Qilian.tif MFP is the depth of soil freezing, Qilian is the depth of soil freezing

Data Citations Data citation guideline What's data citation?

Cite as:

Peng, X., Zhang, T. (2020). Spatial distribution of Active Layer Thickness and Soil Freeze Depth in Qilian Mountain. A Big Earth Data Platform for Three Poles, DOI: 10.11888/Geocry.tpdc.271189. CSTR: 18406.11.Geocry.tpdc.271189. (Download the reference： RIS | Bibtex )

Related Literatures:

1. Peng, X., Zhang, T., Frauenfeld, O. W., Wang, K., Luo, D., Cao, B., ... & Wu, Q. (2018). Spatiotemporal changes in active layer thickness under contemporary and projected climate in the Northern Hemisphere. Journal of Climate, 31(1), 251-266.( View Details | Bibtex)

2. Peng, X., Zhang, T., Frauenfeld, O. W., Wang, K., Cao, B., Zhong, X., ... & Mu, C. (2017). Response of seasonal soil freeze depth to climate change across China. The Cryosphere, 11(3), 1059-1073.( View Details | Bibtex)

Using this data, the data citation is required to be referenced and the related literatures are suggested to be cited.

Support Program

Pan-Third Pole Environment Study for a Green Silk Road-A CAS Strategic Priority A Program (No:XDA20000000)

Copyright & License

To respect the intellectual property rights, protect the rights of data authors, expand services of the data center, and evaluate the application potential of data, data users should clearly indicate the source of the data and the author of the data in the research results generated by using the data (including published papers, articles, data products, and unpublished research reports, data products and other results). For re-posting (second or multiple releases) data, the author must also indicate the source of the original data.

License： This work is licensed under an Attribution 4.0 International (CC BY 4.0)