DOI: 10.5281/zenodo.10908278
title: GloGEM CMIP6 global glacier projections

description: The files contain the glacier evolution as modelled with the Global Glacier Evolution Model (GloGEM; Huss and Hock, 2015) under the CMIP6 (Coupled Model Intercomparison Project Phase 6) climate models. For details about the simulations, refer to Zekollari et al. (2024), where the model setup and the results are described.

The files are provided at the regional scale, for each of the 19 glacier regions as defined in the Randolph Glacier Inventory v6.0 (RGI Consortium, 2017), for two variables (glacier volume and glacier area).

The folder structure is as follows:  ‘Variable/RGIXX’, with:



‘Variable’: ‘Area’ or ‘Volume'

‘RGIXX’: the region, where XX refers to the RGI v6.0 region number


Every file contains the evolution (of Volume [km3] or Area [km2]) for a given Shared Socioeconomic Pathways (SSP), with ssp119.csv corresponding to SSP1-1.9, ssp126 corresponding to SSP1-2.6,…etc.

If you use these data, please cite the dataset as following:



Cite ZENODO

Cite the corresponding publication (Zekollari et al., 2024)


 

Somes notes/remarks:



In these GloGEM simulations, every glacier is calibrated to match the glacier-specific observed mass changes by Hugonnet et al. (2021).

Until 2020, the glacier evolution forcing is from ERA5, while from 2020 onwards, the forcing comes from the respective climate models. Very slight differences can exist in the modelled glacier evolution prior to 2020 for the different climate models, because of randomly generated sub-monthly air temperature variability used to estimate monthly positive degree days more accurately.

In the manuscript that describes the glacier evolution (Zekollari et al., 2024), the results are shown for SSP1-2.6, SSP2-4.5, SSP3-7.0, and SSP5-8.5 (for 12 climate models). In the data provided here on ZENODO, the evolution as modelled under SSP1-1.9 is also included, but these simulations are not described in the manuscript (owing to limited climate model ensemble size, n=3).

For SSP1-2.6, SSP2-4.5, SSP3-7.0, and SSP5-8.5, the considered climate models are the same as in Rounce et al. (2023).

The glacier evolution was modelled with the same climate model forcing as OGGM v1.6.1. The OGGM v1.6.1 data is available from Schuster et al. (2023) and these projections are also described in Zekollari et al. (2024).


References

Hugonnet, R., McNabb, R., Berthier, E., Menounos, B., Nuth, C., Girod, L., Farinotti, D., Huss, M., Dussaillant, I., Brun, F., and Kääb, A.: Accelerated global glacier mass loss in the early twenty-first century, Nature, 592, 726–731, https://doi.org/10.1038/s41586-021-03436-z, 2021.

Huss, M. and Hock, R.: A new model for global glacier change and sea-level rise, Frontiers in Earth Science, 3, 54, https://doi.org/10.3389/feart.2015.00054, 2015.

RGI Consortium: Randolph Glacier Inventory – A Dataset of Global Glacier Outlines: Version 6.0: Technical Report, Global Land Ice Measurements from Space, Colorado, USA. Digital Media, , https://doi.org/10.7265/N5-RGI-60, 2017.

Rounce, D. R., Hock, R., Maussion, F., Hugonnet, R., Kochtitzky, W., Huss, M., Berthier, E., Brinkerhoff, D., Compagno, L., Copland, L., Farinotti, D., Menounos, B., and McNabb, R. W.: Global glacier change in the 21st century: Every increase in temperature matters, Science, 379, 78–83, https://doi.org/10.1126/science.abo1324, 2023.

Schuster, L., Schmitt, P., Vlug, A., and Maussion, F.: OGGM/oggm-standard-projections-csv-files: v1.0 (v1.0), https://doi.org/10.5281/zenodo.8286065, 2023.

Zekollari, H., Huss, M., Schuster, L., Maussion, F., Rounce, D. R., Aguayo, R., Champollion, N., Compagno, L., Hugonnet, R., Marzeion, B., Mojtabavi, S., and Farinotti, D.: Twenty-first century global glacier evolution under CMIP6 scenarios and the role of glacier-specific observations, The Cryosphere, 18, 5045-5066, https://doi.org/10.5194/tc-18-5045-2024, 2024.