Articles | Volume 18, issue 11
https://doi.org/10.5194/essd-18-8211-2026
https://doi.org/10.5194/essd-18-8211-2026
Data description article
 | 
11 Nov 2026
Data description article |  | 11 Nov 2026

A 1 km gridded dataset of Northern Hemisphere permafrost active layer thickness (2000–2024)

Yujiao Wei, Zhaoqi Wu, Jiaxue Wang, Huanfeng Shen, and Yiyun Chen

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Cited articles

Aalto, J., Karjalainen, O., Hjort, J., and Luoto, M.: Statistical forecasting of current and future Circum-Arctic ground temperatures and active layer thickness, Geophys. Res. Lett., 45, 4889–4898, https://doi.org/10.1029/2018GL078007, 2018. 
Chadburn, S. E., Burke, E. J., Cox, P. M., Friedlingstein, P., Hugelius, G., and Westermann, S.: An observation-based constraint on permafrost loss as a function of global warming, Nat. Clim. Change, 7, 340–344, https://doi.org/10.1038/nclimate3262, 2017. 
Cheng, G., Zhao, L., Li, R., Wu, X., Sheng, Y., Hu, G., Zou, D., Jin, H., Li, X., and Wu, Q.: Characteristic, changes and impacts of permafrost on Qinghai-Tibet Plateau, Chinese Sci. Bull., 64, 2783–2795, https://doi.org/10.1360/TB-2019-0191, 2019. 
Ding, K., Jiang, P., Ni, J., Shen, T., Yang, B., Zhang, R., and Yu, Z.: Machine learning uncovers a multi-year climate memory in permafrost degradation on the qinghai–tibet plateau: The critical roles of precipitation and lagged temperature, J. Hydrol., 663, 134272, https://doi.org/10.1016/j.jhydrol.2025.134272, 2025. 
Farquharson, L. M., Romanovsky, V. E., Kholodov, A., and Nicolsky, D.: Sub-aerial talik formation observed across the discontinuous permafrost zone of alaska, Nat. Geosci., 15, 475–481, https://doi.org/10.1038/s41561-022-00952-z, 2022. 
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Short summary
Thawing permafrost accelerates global warming and threatens infrastructure, yet tracking changes over vast areas remains difficult. We combined over two decades of ground observations with artificial intelligence to create a continuous, highly detailed yearly map of permafrost thaw depth across the Northern Hemisphere from 2000 to 2024. Overcoming previous mapping limitations, this reliable dataset provides a vital tool to evaluate environmental hazards and protect vulnerable regions.
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