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...
Published in: | The Cryosphere |
---|---|
Main Authors: | , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Copernicus Publications
2023
|
Subjects: | |
Online Access: | https://doi.org/10.5194/tc-17-5435-2023 https://doaj.org/article/5b9e9111005d48e28a954df6c061e157 |
id |
ftdoajarticles:oai:doaj.org/article:5b9e9111005d48e28a954df6c061e157 |
---|---|
record_format |
openpolar |
spelling |
ftdoajarticles:oai:doaj.org/article:5b9e9111005d48e28a954df6c061e157 2024-01-21T10:10:52+01:00 Annual to seasonal glacier mass balance in High Mountain Asia derived from Pléiades stereo images: examples from the Pamir and the Tibetan Plateau D. Falaschi A. Bhattacharya G. Guillet L. Huang O. King K. Mukherjee P. Rastner T. Yao T. Bolch 2023-12-01T00:00:00Z https://doi.org/10.5194/tc-17-5435-2023 https://doaj.org/article/5b9e9111005d48e28a954df6c061e157 EN eng Copernicus Publications https://tc.copernicus.org/articles/17/5435/2023/tc-17-5435-2023.pdf https://doaj.org/toc/1994-0416 https://doaj.org/toc/1994-0424 doi:10.5194/tc-17-5435-2023 1994-0416 1994-0424 https://doaj.org/article/5b9e9111005d48e28a954df6c061e157 The Cryosphere, Vol 17, Pp 5435-5458 (2023) Environmental sciences GE1-350 Geology QE1-996.5 article 2023 ftdoajarticles https://doi.org/10.5194/tc-17-5435-2023 2023-12-24T01:42:15Z 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 Directory of Open Access Journals: DOAJ Articles The Sentinel ENVELOPE(73.317,73.317,-52.983,-52.983) The Cryosphere 17 12 5435 5458 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Environmental sciences GE1-350 Geology QE1-996.5 |
spellingShingle |
Environmental sciences GE1-350 Geology QE1-996.5 D. Falaschi A. Bhattacharya G. Guillet L. Huang O. King K. Mukherjee P. Rastner T. Yao T. Bolch Annual to seasonal glacier mass balance in High Mountain Asia derived from Pléiades stereo images: examples from the Pamir and the Tibetan Plateau |
topic_facet |
Environmental sciences GE1-350 Geology QE1-996.5 |
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 |
D. Falaschi A. Bhattacharya G. Guillet L. Huang O. King K. Mukherjee P. Rastner T. Yao T. Bolch |
author_facet |
D. Falaschi A. Bhattacharya G. Guillet L. Huang O. King K. Mukherjee P. Rastner T. Yao T. Bolch |
author_sort |
D. Falaschi |
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 Publications |
publishDate |
2023 |
url |
https://doi.org/10.5194/tc-17-5435-2023 https://doaj.org/article/5b9e9111005d48e28a954df6c061e157 |
long_lat |
ENVELOPE(73.317,73.317,-52.983,-52.983) |
geographic |
The Sentinel |
geographic_facet |
The Sentinel |
genre |
The Cryosphere |
genre_facet |
The Cryosphere |
op_source |
The Cryosphere, Vol 17, Pp 5435-5458 (2023) |
op_relation |
https://tc.copernicus.org/articles/17/5435/2023/tc-17-5435-2023.pdf https://doaj.org/toc/1994-0416 https://doaj.org/toc/1994-0424 doi:10.5194/tc-17-5435-2023 1994-0416 1994-0424 https://doaj.org/article/5b9e9111005d48e28a954df6c061e157 |
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 |
_version_ |
1788702318701576192 |