Glacier elevation changes data in the High Mountain Asia derived from multi-temporal digital elevation models since the 1960s


Knowledge about the long-term response of High Mountain Asia (HMA) glaciers to climatic variations is paramount because of their important role in sustaining Asian river flow. Here. a satellite-based time series of glacier mass balance for seven climatically different regions across HMA since the 1960s were estimated by DEM differencing of multi-temporal optical data. The DEMs were corrected for planimetric and altimetric shifts using SRTM as a reference. Elevation dependent biases, present due to the tilt between two DEMs, were also estimated for each DEM using two-dimensional first order polynomial trend surfaces relative to the SRTM DEM. To remove outliers, we analyzed individual glacier elevation differences for each 100 m altitude bin. Considering the heterogeneity of the thickness change in glacierized terrain, outliers were removed by using an elevation dependent sigmoid function. Our study reveals a constant mass loss in all regions even in regions where glaciers were previously in balance with climate.

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Metadata Access
Creator Bhattacharya, Atanu ORCID logo; Bolch, Tobias ORCID logo; Mukherjee, Kriti ORCID logo; King, Owen ORCID logo; Menounos, Brian ORCID logo; Kapitsa, Vassiliy (ORCID: 0000-0002-9342-160X); Neckel, Niklas ORCID logo; Yang, Wei; Yao, Tandong
Publisher PANGAEA
Publication Year 2021
Funding Reference Chinese Academy of Sciences Crossref Funder ID XDA20100300 ; Swiss National Science Foundation Crossref Funder ID 177652 Estimation of global glacier mass changes
Rights Creative Commons Attribution 4.0 International;
OpenAccess true
Resource Type Dataset
Format text/tab-separated-values
Size 16 data points
Discipline Earth System Research
Spatial Coverage (75.178W, 28.251S, 90.585E, 43.013N)