Glacier elevation changes in the Karakoram Range derived from TanDEM-X and SRTM/X-SAR digital elevation models, 2000-2012, link to GeoTIFF
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| Auteurs principaux: | , |
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| Format: | Dataset Open Access |
| Langue: | en |
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PANGAEA
2016
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| _version_ | 1867170997387395072 |
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| author | Rankl, Melanie Braun, Matthias Holger |
| author_facet | Rankl, Melanie Braun, Matthias Holger |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Snow cover and glaciers in the Karakoram region are important freshwater resources for many down-river communities as they provide water for irrigation and hydropower. A better understanding of current glacier changes is hence an important informational baseline. We present glacier elevation changes in the central Karakoram region using TanDEM-X and SRTM/X-SAR DEM differences between 2000 and 2012. We calculated elevation differences for glaciers with advancing and stable termini or surge-type glaciers separately using an inventory from a previous study. Glaciers with stable and advancing termini since the 1970s showed nearly balanced elevation changes of -0.09 ± 0.12 m/a on average or mass budgets of -0.01 ± 0.02 Gt/a (using a density of 850 kg/m**3). Our findings are in accordance with previous studies indicating stable or only slightly negative glacier mass balances during recent years in the Karakoram. The high-resolution elevation changes revealed distinct patterns of mass relocation at glacier surfaces during active surge cycles. The formation of kinematic waves at quiescent surge-type glaciers could be observed and points towards future active surge behaviour. Our study reveals the potential of the TanDEM-X mission to estimate geodetic glacier mass balances, but also points to still existing uncertainties induced by the geodetic method. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_873279 |
| institution | PANGAEA |
| language | en |
| publishDate | 2016 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Glacier elevation changes in the Karakoram Range derived from TanDEM-X and SRTM/X-SAR digital elevation models, 2000-2012, link to GeoTIFF Rankl, Melanie Braun, Matthias Holger Karakoram; MULT; Multiple investigations Snow cover and glaciers in the Karakoram region are important freshwater resources for many down-river communities as they provide water for irrigation and hydropower. A better understanding of current glacier changes is hence an important informational baseline. We present glacier elevation changes in the central Karakoram region using TanDEM-X and SRTM/X-SAR DEM differences between 2000 and 2012. We calculated elevation differences for glaciers with advancing and stable termini or surge-type glaciers separately using an inventory from a previous study. Glaciers with stable and advancing termini since the 1970s showed nearly balanced elevation changes of -0.09 ± 0.12 m/a on average or mass budgets of -0.01 ± 0.02 Gt/a (using a density of 850 kg/m**3). Our findings are in accordance with previous studies indicating stable or only slightly negative glacier mass balances during recent years in the Karakoram. The high-resolution elevation changes revealed distinct patterns of mass relocation at glacier surfaces during active surge cycles. The formation of kinematic waves at quiescent surge-type glaciers could be observed and points towards future active surge behaviour. Our study reveals the potential of the TanDEM-X mission to estimate geodetic glacier mass balances, but also points to still existing uncertainties induced by the geodetic method. |
| title | Glacier elevation changes in the Karakoram Range derived from TanDEM-X and SRTM/X-SAR digital elevation models, 2000-2012, link to GeoTIFF |
| topic | Karakoram; MULT; Multiple investigations |
| url | https://doi.org/10.1594/PANGAEA.873279 |