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  ECS Awardee 2023: Chhota shigri glacier (India) Mass balance over 2002-2020: Evaluation and correction

Azam, M. F., Vincent, C., Berthier, E., Srivastava, S., Wagnon, P., Kaushik, H., Mandal, A., Alagappan, R. (2023): ECS Awardee 2023: Chhota shigri glacier (India) Mass balance over 2002-2020: Evaluation and correction, XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) (Berlin 2023).
https://doi.org/10.57757/IUGG23-4271

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Item Permalink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5021707 Version Permalink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5021707_1
Genre: Conference Paper

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 Creators:
Azam, Mohd Farooq1, Author
Vincent, Christian1, Author
Berthier, Etienne1, Author
Srivastava, Smriti1, Author
Wagnon, Patrick1, Author
Kaushik, Himanshu1, Author
Mandal, Arindan1, Author
Alagappan, Ramanathan1, Author
Affiliations:
1IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations, ou_5011304              

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 Abstract: The mass balance observations have been carried out on Chhota Shigri Glacier since 2002. Due to difficult glacier accessibility, dynamics, and involvement of different researchers, the measurement network differs in space over time. Further, almost all glaciological mass balance series are affected by the systematic biases due to specifically designed point mass balance network, and lack of basal and internal mass loss measurements. The goal of this study is to re-analyze the mass balances on Chhota Shigri Glacier and provide a homogenized series. We applied the nonlinear model of Vincent and others (2018) to capture the spatiotemporal changes in point mass balances and re-estimated the annual glacier-wide mass balances over 2002-2020. The nonlinear model also allows to detect the erroneous point measurements which are either corrected from the field notebooks or removed from the analysis. The mass balances are then homogenized applying the areal changes estimated using SPOT5 (2005) and Pléiades images (2014 and 2020), assuming a linear areal change. Finally, the mass balances are adjusted using the geodetic mass balances estimated by differencing ASTER and Pléiades DEMs (Oct 2003–Sept 2014) and Pléiades DEMs (Sept 2014–Sept 2020). The reanalyzed mean annual glacier-wide mass balance is estimated to be –0.47 ± 0.18 m w.e. a−1 (equivalent to a cumulative mass loss of –8.40 m w.e.) with a standard deviation of 0.66 m w.e. a−1 over 2002-2020. The glacier lost maximum mass of –1.29 ± 0.16 m w.e. in 2017/18 while gained a mass of 0.49 ± 0.19 m w.e. in 2004/05.

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Language(s): eng - English
 Dates: 2023-07-112023-07-11
 Publication Status: Finally published
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 Rev. Type: -
 Identifiers: DOI: 10.57757/IUGG23-4271
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Title: XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG)
Place of Event: Berlin
Start-/End Date: 2023-07-11 - 2023-07-20

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Title: XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG)
Source Genre: Proceedings
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Publ. Info: Potsdam : GFZ German Research Centre for Geosciences
Pages: - Volume / Issue: - Sequence Number: - Start / End Page: - Identifier: -