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  Effect of half-degree warming on regional glacier evolution and impact on hydrology during the 21st century

Champollion, N., Maure, D., Samuel, C., Fabien, G.-C. (2023): Effect of half-degree warming on regional glacier evolution and impact on hydrology during the 21st century, XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) (Berlin 2023).
https://doi.org/10.57757/IUGG23-4236

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 Creators:
Champollion, Nicolas1, Author
Maure, Damien1, Author
Samuel, Cook1, Author
Fabien, Gillet-Chaulet1, 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 most recent IPCC reports highlighted that every degree counts when considering the impacts of global warming, especially for glacier evolution, and it has been recently confirmed by Rounce et al., 2023. Our study aims to simulate glacier evolution globally by 2100 and assess their impacts for downstream hydrology. We used the Open Global Glacier Model (https://oggm.org/) that permits to simulate the future of all glaciers individually in the 19 regions of the RGI inventory for the 21st century, simulating surface mass balance and ice dynamics in a coherent global framework. Climate forcing are derived from CMIP6 simulations, and are grouped by different 2100 global warming targets. Results show 3 kinds of glacier and related hydrology behavior during the 21st century: 1. regions where the maximum contribution of glaciers to river runoff, called peak water, is already reached, associated with a large decrease of glacier runoff and a low influence of the 2100 warming target; 2. regions where the peak water will probably be reached in the coming decades with generally a moderate influence of the climate scenario and a decrease of the monthly maximum glacier melt; 3. regions where the peak water will probably not be reached in the 21st century with a large influence of the 2100 warming target and an increase of glacier contribution to river runoff during the whole 21st century. Finally, results confirmed the importance of every half-degree of global warming but also highlighted very different behaviors between glacierized regions for downstream hydrology.

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Language(s): eng - English
 Dates: 2023-07-112023-07-11
 Publication Status: Finally published
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 Identifiers: DOI: 10.57757/IUGG23-4236
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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
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