Glacier elevation changes data in the High Mountain Asia derived from multi-temporal digital elevation models since the 1960s
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| Autori principali: | , , , , , , , , |
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| Natura: | Dataset Open Access |
| Lingua: | en |
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PANGAEA
2021
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| _version_ | 1867168211640778752 |
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| author | Bhattacharya, Atanu Bolch, Tobias Mukherjee, Kriti King, Owen Menounos, Brian Kapitsa, Vassiliy Neckel, Niklas Yang, Wei Yao, Tandong |
| author_facet | Bhattacharya, Atanu Bolch, Tobias Mukherjee, Kriti King, Owen Menounos, Brian Kapitsa, Vassiliy Neckel, Niklas Yang, Wei Yao, Tandong |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | 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. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_933924 |
| institution | PANGAEA |
| language | en |
| publishDate | 2021 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Glacier elevation changes data in the High Mountain Asia derived from multi-temporal digital elevation models since the 1960s Bhattacharya, Atanu Bolch, Tobias Mukherjee, Kriti King, Owen Menounos, Brian Kapitsa, Vassiliy Neckel, Niklas Yang, Wei Yao, Tandong Ak-Shirak; Binary Object; Binary Object (File Size); Climate change; Event label; glacier elevation change; Glacier mass balance; Gurla_Mandhata; Langtang_sub-region; LATITUDE; Location; LONGITUDE; MULT; Multiple investigations; Muztagh_Ata; Northern_Tien_Shan; Poiqu_region; Purogangri_Ice_Cap; Western_Nyainqentanglha 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. |
| title | Glacier elevation changes data in the High Mountain Asia derived from multi-temporal digital elevation models since the 1960s |
| topic | Ak-Shirak; Binary Object; Binary Object (File Size); Climate change; Event label; glacier elevation change; Glacier mass balance; Gurla_Mandhata; Langtang_sub-region; LATITUDE; Location; LONGITUDE; MULT; Multiple investigations; Muztagh_Ata; Northern_Tien_Shan; Poiqu_region; Purogangri_Ice_Cap; Western_Nyainqentanglha |
| url | https://doi.org/10.1594/PANGAEA.933924 |