Contribution of ground ice melting to the expansion of Selin Co (lake) on the Tibetan Plateau
Selin Co, located within permafrost regions surrounded by glaciers, has exhibited the greatest increase in water storage among all the lakes on the Tibetan Plateau over the last 50 years. Most of the increased lake water volume has been attributed to increased precipitation and the accelerated melti...
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ftdoajarticles:oai:doaj.org/article:40733eba0a4a4c019bd357ae0f802fec 2023-05-15T16:37:01+02:00 Contribution of ground ice melting to the expansion of Selin Co (lake) on the Tibetan Plateau L. Wang L. Zhao H. Zhou S. Liu E. Du D. Zou G. Liu Y. Xiao G. Hu C. Wang Z. Sun Z. Li Y. Qiao T. Wu C. Li X. Li 2022-07-01T00:00:00Z https://doi.org/10.5194/tc-16-2745-2022 https://doaj.org/article/40733eba0a4a4c019bd357ae0f802fec EN eng Copernicus Publications https://tc.copernicus.org/articles/16/2745/2022/tc-16-2745-2022.pdf https://doaj.org/toc/1994-0416 https://doaj.org/toc/1994-0424 doi:10.5194/tc-16-2745-2022 1994-0416 1994-0424 https://doaj.org/article/40733eba0a4a4c019bd357ae0f802fec The Cryosphere, Vol 16, Pp 2745-2767 (2022) Environmental sciences GE1-350 Geology QE1-996.5 article 2022 ftdoajarticles https://doi.org/10.5194/tc-16-2745-2022 2022-12-30T22:23:49Z Selin Co, located within permafrost regions surrounded by glaciers, has exhibited the greatest increase in water storage among all the lakes on the Tibetan Plateau over the last 50 years. Most of the increased lake water volume has been attributed to increased precipitation and the accelerated melting of glacier ice, but these processes are still not sufficient to close the water budget with the expansion of Selin Co. Ground ice meltwater released by thawing permafrost due to continuous climate warming over the past several decades is regarded as another source of lake expansion. This study presents the first attempt to quantify the water contribution of ground ice melting to the expansion of Selin Co by evaluating the ground surface deformation. We monitored the spatial distribution of surface deformation in the Selin Co basin using the small baseline subset (SBAS) interferometric synthetic aperture radar (InSAR) technique and compared the results with the findings of field surveys. Then, the ground ice meltwater volume in the watershed was calculated based on the cumulated settlement. Finally, this volume was compared with the lake volume change during the same period, and the contribution ratio was derived. SBAS-InSAR monitoring during 2017–2020 illustrated widespread and large subsidence in the upstream section of the Zhajiazangbu subbasin, where widespread continuous permafrost is present. The terrain subsidence rate was normally between 5 and 20 mm a −1 , indicating rapid ground ice loss in the region. The ground ice meltwater was released at a rate of <math xmlns="http://www.w3.org/1998/Math/MathML" id="M2" display="inline" overflow="scroll" dspmath="mathml"><mrow><mo>∼</mo><mn mathvariant="normal">57</mn><mo>×</mo><msup><mn mathvariant="normal">10</mn><mn mathvariant="normal">6</mn></msup></mrow></math> <svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="52pt" height="14pt" class="svg-formula" ... Article in Journal/Newspaper Ice permafrost The Cryosphere Directory of Open Access Journals: DOAJ Articles The Cryosphere 16 7 2745 2767 |
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Directory of Open Access Journals: DOAJ Articles |
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ftdoajarticles |
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English |
topic |
Environmental sciences GE1-350 Geology QE1-996.5 |
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Environmental sciences GE1-350 Geology QE1-996.5 L. Wang L. Zhao H. Zhou S. Liu E. Du D. Zou G. Liu Y. Xiao G. Hu C. Wang Z. Sun Z. Li Y. Qiao T. Wu C. Li X. Li Contribution of ground ice melting to the expansion of Selin Co (lake) on the Tibetan Plateau |
topic_facet |
Environmental sciences GE1-350 Geology QE1-996.5 |
description |
Selin Co, located within permafrost regions surrounded by glaciers, has exhibited the greatest increase in water storage among all the lakes on the Tibetan Plateau over the last 50 years. Most of the increased lake water volume has been attributed to increased precipitation and the accelerated melting of glacier ice, but these processes are still not sufficient to close the water budget with the expansion of Selin Co. Ground ice meltwater released by thawing permafrost due to continuous climate warming over the past several decades is regarded as another source of lake expansion. This study presents the first attempt to quantify the water contribution of ground ice melting to the expansion of Selin Co by evaluating the ground surface deformation. We monitored the spatial distribution of surface deformation in the Selin Co basin using the small baseline subset (SBAS) interferometric synthetic aperture radar (InSAR) technique and compared the results with the findings of field surveys. Then, the ground ice meltwater volume in the watershed was calculated based on the cumulated settlement. Finally, this volume was compared with the lake volume change during the same period, and the contribution ratio was derived. SBAS-InSAR monitoring during 2017–2020 illustrated widespread and large subsidence in the upstream section of the Zhajiazangbu subbasin, where widespread continuous permafrost is present. The terrain subsidence rate was normally between 5 and 20 mm a −1 , indicating rapid ground ice loss in the region. The ground ice meltwater was released at a rate of <math xmlns="http://www.w3.org/1998/Math/MathML" id="M2" display="inline" overflow="scroll" dspmath="mathml"><mrow><mo>∼</mo><mn mathvariant="normal">57</mn><mo>×</mo><msup><mn mathvariant="normal">10</mn><mn mathvariant="normal">6</mn></msup></mrow></math> <svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="52pt" height="14pt" class="svg-formula" ... |
format |
Article in Journal/Newspaper |
author |
L. Wang L. Zhao H. Zhou S. Liu E. Du D. Zou G. Liu Y. Xiao G. Hu C. Wang Z. Sun Z. Li Y. Qiao T. Wu C. Li X. Li |
author_facet |
L. Wang L. Zhao H. Zhou S. Liu E. Du D. Zou G. Liu Y. Xiao G. Hu C. Wang Z. Sun Z. Li Y. Qiao T. Wu C. Li X. Li |
author_sort |
L. Wang |
title |
Contribution of ground ice melting to the expansion of Selin Co (lake) on the Tibetan Plateau |
title_short |
Contribution of ground ice melting to the expansion of Selin Co (lake) on the Tibetan Plateau |
title_full |
Contribution of ground ice melting to the expansion of Selin Co (lake) on the Tibetan Plateau |
title_fullStr |
Contribution of ground ice melting to the expansion of Selin Co (lake) on the Tibetan Plateau |
title_full_unstemmed |
Contribution of ground ice melting to the expansion of Selin Co (lake) on the Tibetan Plateau |
title_sort |
contribution of ground ice melting to the expansion of selin co (lake) on the tibetan plateau |
publisher |
Copernicus Publications |
publishDate |
2022 |
url |
https://doi.org/10.5194/tc-16-2745-2022 https://doaj.org/article/40733eba0a4a4c019bd357ae0f802fec |
genre |
Ice permafrost The Cryosphere |
genre_facet |
Ice permafrost The Cryosphere |
op_source |
The Cryosphere, Vol 16, Pp 2745-2767 (2022) |
op_relation |
https://tc.copernicus.org/articles/16/2745/2022/tc-16-2745-2022.pdf https://doaj.org/toc/1994-0416 https://doaj.org/toc/1994-0424 doi:10.5194/tc-16-2745-2022 1994-0416 1994-0424 https://doaj.org/article/40733eba0a4a4c019bd357ae0f802fec |
op_doi |
https://doi.org/10.5194/tc-16-2745-2022 |
container_title |
The Cryosphere |
container_volume |
16 |
container_issue |
7 |
container_start_page |
2745 |
op_container_end_page |
2767 |
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1766027324838379520 |