The mean annual ground temperature (MAGT) and permafrost thermal stability dataset over Tibetan Plateau for 2005-2015


Data scarcity is a major obstacle for high-resolution mapping of permafrost on the Tibetan Plateau (TP). This study produces a new permafrost stability distribution map for the 2010s (2005-2015) derived from the predicted mean annual ground temperature (MAGT) at a depth of zero annual amplitude (10 - 25 m) by integrating remotely sensed freezing degree-days and thawing degree-days, snow cover days, leaf area index, soil bulk density, high-accuracy soil moisture data, and in situ MAGT measurements from 237 boreholes on the TP by using an ensemble learning method that employs a support vector regression (SVR) model based on distance-blocked resampling training data with 200 repetitions. Validation of the new permafrost map indicates that it is probably the most accurate of all available maps at present. This map shows that the total area of permafrost on the TP, excluding glaciers and lakes, is approximately 115.02 (105.47-129.59) ✖104 km2. The areas corresponding to the very stable, stable, semi-stable, transitional, and unstable types are 0.86✖104 km2, 9.62✖104 km2, 38.45✖104 km2, 42.29✖104 km2, and 23.80✖104 km2, respectively. This new map is of fundamental importance for engineering planning and design, ecosystem management, and evaluation of the permafrost change in the future on the TP as a baseline.


Data file naming and use method

Named MAGT, ArcGIS software opens


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RAN Youhua, LI Xin. The mean annual ground temperature (MAGT) and permafrost thermal stability dataset over Tibetan Plateau for 2005-2015. A Big Earth Data Platform for Three Poles, 2019. doi: 10.11888/Geogra.tpdc.270672. (Download the reference: RIS | Bibtex )

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References literature

1.Ran, Y.H., Li, X., Cheng, G.D., et al. 2020. Mapping the permafrost stability over the Tibetan Plateau for 2005-2015. Science China Earth Sciences. (View Details )


Support Program

CASEarth:Big Earth Data for Three Poles(grant No. XDA19070000) (No:XDA19000000)

o Strategic Priority ResearchProgram of the Chinese Academy of Sciences: Grant No. XDA19070204 (No:XDA19070204) [XDA19070204]

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


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Keywords
Geographic coverage
East: 105.00 West: 74.00
South: 26.00 North: 40.00
Detail
  • Temporal resolution: Yearly
  • Spatial resolution: km
  • File size: 8 MB
  • Browse count: 1,267 Times
  • Apply count: 0 Times
  • Share mode: protected
  • Temporal coverage: 2010-01-01 To 2010-12-31
  • Updated time: 2019-10-18

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Contact Information
: RAN Youhua   LI Xin  

Distributor: A Big Earth Data Platform for Three Poles

Email: poles@itpcas.ac.cn

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