Annual to seasonal glacier mass balance in High Mountain Asia derived from Pléiades stereo images: examples from the Pamir and the Tibetan Plateau
Glaciers are crucial sources of freshwater in particular for the arid lowlands surrounding High Mountain Asia. To better constrain glacio-hydrological models, annual, or even better, seasonal information about glacier mass changes is highly beneficial. In this study, we evaluate the suitability of v...
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ftcranfield:oai:dspace.lib.cranfield.ac.uk:1826/20900 2024-04-21T08:12:42+00:00 Annual to seasonal glacier mass balance in High Mountain Asia derived from Pléiades stereo images: examples from the Pamir and the Tibetan Plateau Falaschi, Daniel Bhattacharya, Atanu Guillet, Gregoire Huang, Lei King, Owen Mukherjee, Kriti Rastner, Philipp Yao, Tandong Bolch, Tobias 2023-12-20 https://doi.org/10.5194/tc-17-5435-2023 https://dspace.lib.cranfield.ac.uk/handle/1826/20900 en eng Copernicus Falaschi D, Bhattacharya A, Guillet G, et al., (2023) Annual to seasonal glacier mass balance in High Mountain Asia derived from Pléiades stereo images: examples from the Pamir and the Tibetan Plateau. The Cryosphere, Volume 17, Issue 12, 2023, pp. 5435-5458 https://doi.org/10.5194/tc-17-5435-2023 https://dspace.lib.cranfield.ac.uk/handle/1826/20900 1994-0424 Attribution 4.0 International http://creativecommons.org/licenses/by/4.0/ Article 2023 ftcranfield https://doi.org/10.5194/tc-17-5435-2023 2024-03-27T15:03:58Z Glaciers are crucial sources of freshwater in particular for the arid lowlands surrounding High Mountain Asia. To better constrain glacio-hydrological models, annual, or even better, seasonal information about glacier mass changes is highly beneficial. In this study, we evaluate the suitability of very-high-resolution Pléiades digital elevation models (DEMs) to measure glacier mass balance at annual and seasonal scales in two regions of High Mountain Asia (Muztagh Ata in Eastern Pamirs and parts of western Nyainqêntanglha, south-central Tibetan Plateau), where recent estimates have shown contrasting glacier behaviour. The average annual mass balance in Muztagh Ata between 2019 and 2022 was −0.07 ± 0.20 m w.e. a−1, suggesting the continuation of a recent phase of slight mass loss following a prolonged period of balanced mass budgets previously observed. The mean annual mass balance in western Nyainqêntanglha was highly negative for the same period (−0.60 ± 0.15 m w.e. a−1), suggesting increased mass loss rates compared to the approximately previous 5 decades. The 2022 winter (+0.13 ± 0.24 m w.e.) and summer (−0.35 ± 0.15 m w.e.) mass budgets in Muztagh Ata and western Nyainqêntanglha (−0.03 ± 0.27 m w.e. in winter; −0.63 ± 0.07 m w.e. in summer) suggest winter- and summer-accumulation-type regimes, respectively. We support our findings by implementing the Sentinel-1-based Glacier Index to identify the firn and wet-snow areas on glaciers and characterize the accumulation type. The good match between the geodetic and Glacier Index results supports the potential of very-high-resolution Pléiades data to monitor mass balance at short timescales and improves our understanding of glacier accumulation regimes across High Mountain Asia. Article in Journal/Newspaper The Cryosphere Cranfield University: Collection of E-Research - CERES The Cryosphere 17 12 5435 5458 |
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Open Polar |
collection |
Cranfield University: Collection of E-Research - CERES |
op_collection_id |
ftcranfield |
language |
English |
description |
Glaciers are crucial sources of freshwater in particular for the arid lowlands surrounding High Mountain Asia. To better constrain glacio-hydrological models, annual, or even better, seasonal information about glacier mass changes is highly beneficial. In this study, we evaluate the suitability of very-high-resolution Pléiades digital elevation models (DEMs) to measure glacier mass balance at annual and seasonal scales in two regions of High Mountain Asia (Muztagh Ata in Eastern Pamirs and parts of western Nyainqêntanglha, south-central Tibetan Plateau), where recent estimates have shown contrasting glacier behaviour. The average annual mass balance in Muztagh Ata between 2019 and 2022 was −0.07 ± 0.20 m w.e. a−1, suggesting the continuation of a recent phase of slight mass loss following a prolonged period of balanced mass budgets previously observed. The mean annual mass balance in western Nyainqêntanglha was highly negative for the same period (−0.60 ± 0.15 m w.e. a−1), suggesting increased mass loss rates compared to the approximately previous 5 decades. The 2022 winter (+0.13 ± 0.24 m w.e.) and summer (−0.35 ± 0.15 m w.e.) mass budgets in Muztagh Ata and western Nyainqêntanglha (−0.03 ± 0.27 m w.e. in winter; −0.63 ± 0.07 m w.e. in summer) suggest winter- and summer-accumulation-type regimes, respectively. We support our findings by implementing the Sentinel-1-based Glacier Index to identify the firn and wet-snow areas on glaciers and characterize the accumulation type. The good match between the geodetic and Glacier Index results supports the potential of very-high-resolution Pléiades data to monitor mass balance at short timescales and improves our understanding of glacier accumulation regimes across High Mountain Asia. |
format |
Article in Journal/Newspaper |
author |
Falaschi, Daniel Bhattacharya, Atanu Guillet, Gregoire Huang, Lei King, Owen Mukherjee, Kriti Rastner, Philipp Yao, Tandong Bolch, Tobias |
spellingShingle |
Falaschi, Daniel Bhattacharya, Atanu Guillet, Gregoire Huang, Lei King, Owen Mukherjee, Kriti Rastner, Philipp Yao, Tandong Bolch, Tobias Annual to seasonal glacier mass balance in High Mountain Asia derived from Pléiades stereo images: examples from the Pamir and the Tibetan Plateau |
author_facet |
Falaschi, Daniel Bhattacharya, Atanu Guillet, Gregoire Huang, Lei King, Owen Mukherjee, Kriti Rastner, Philipp Yao, Tandong Bolch, Tobias |
author_sort |
Falaschi, Daniel |
title |
Annual to seasonal glacier mass balance in High Mountain Asia derived from Pléiades stereo images: examples from the Pamir and the Tibetan Plateau |
title_short |
Annual to seasonal glacier mass balance in High Mountain Asia derived from Pléiades stereo images: examples from the Pamir and the Tibetan Plateau |
title_full |
Annual to seasonal glacier mass balance in High Mountain Asia derived from Pléiades stereo images: examples from the Pamir and the Tibetan Plateau |
title_fullStr |
Annual to seasonal glacier mass balance in High Mountain Asia derived from Pléiades stereo images: examples from the Pamir and the Tibetan Plateau |
title_full_unstemmed |
Annual to seasonal glacier mass balance in High Mountain Asia derived from Pléiades stereo images: examples from the Pamir and the Tibetan Plateau |
title_sort |
annual to seasonal glacier mass balance in high mountain asia derived from pléiades stereo images: examples from the pamir and the tibetan plateau |
publisher |
Copernicus |
publishDate |
2023 |
url |
https://doi.org/10.5194/tc-17-5435-2023 https://dspace.lib.cranfield.ac.uk/handle/1826/20900 |
genre |
The Cryosphere |
genre_facet |
The Cryosphere |
op_relation |
Falaschi D, Bhattacharya A, Guillet G, et al., (2023) Annual to seasonal glacier mass balance in High Mountain Asia derived from Pléiades stereo images: examples from the Pamir and the Tibetan Plateau. The Cryosphere, Volume 17, Issue 12, 2023, pp. 5435-5458 https://doi.org/10.5194/tc-17-5435-2023 https://dspace.lib.cranfield.ac.uk/handle/1826/20900 1994-0424 |
op_rights |
Attribution 4.0 International http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.5194/tc-17-5435-2023 |
container_title |
The Cryosphere |
container_volume |
17 |
container_issue |
12 |
container_start_page |
5435 |
op_container_end_page |
5458 |
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1796932833289175040 |