Geladandong region is an important and typical source region of great rivers and lakes in the Qinghai Tibet Plateau. This data set provides DEM covering glaciers in the source region of the Yangtze River and Selin Co with different time scales and resolutions to calculate the seasonal and decadal changes of glacier surface elevation in the source region. This data set includes seven 5-meter resolution TanDEM-X data from July 2016 to 2017, which can be used to calculate the seasonal change of glacier surface elevation; it includes one KH-9 DEM with a resolution of 30m in 1976, five TanDEM-X with a resolution of 30m in 2011, one TanDEM-X in 2014 and three TanDEM-X in 2017 with a resolution of 30m. The data can be used to calculate the change of glacier surface elevation during 1976-2000, 2000-20112011-2017. At the same time, Landsat ETM data are used to extract the glacier outline in 1976and we divide it according to the RGI6.0; The right figure shows the spatial and temporal coverage information of the data set, and the base figure is the orthophoto corrected kh-9 image.

File naming and required software

The data file is named according to the sensor plus date information. Where, tdx refers to TanDEM-X cossc data, kh9 refers to hexagon kh-9, ETM refers to Landsat ETM, and the date is in yyyymmdd format. The data is in GeoTIFF and ShapeFile format and can be opened in ArcGIS or QGIS and other GIS software. DEM's projection is WGS_ 1984_ UTM_ Zone_ 46n, the glacier contour is projected as Albert conical equal area

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Cite as:

Chen, W. (2021). Time series DEM of glacier surface in the source area of the Yangtze River and Selin Co region (1976-2017). A Big Earth Data Platform for Three Poles, DOI: 10.11888/Glacio.tpdc.271666. CSTR: 18406.11.Glacio.tpdc.271666. (Download the reference： RIS | Bibtex )

Related Literatures:

1. Chen, W., Yao, T., Zhang, G., Li, S., & Zheng, G. (2021). Accelerated glacier mass loss in the largest river and lake source regions of the Tibetan Plateau and its links with local water balance over 1976–2017. Journal of Glaciology 1–15. https://doi.org/10.1017/jog.2021.9.( 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

Second Tibetan Plateau Scientific Expedition Program

the Strategic Priority Research Program of the Chinese Academy of Sciences (No:XDA20100101)

Natural Science Foundation of China (No:41871056)

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