Articles | Volume 15, issue 6
https://doi.org/10.5194/tc-15-3013-2021
https://doi.org/10.5194/tc-15-3013-2021
Brief communication
 | 
30 Jun 2021
Brief communication |  | 30 Jun 2021

Brief communication: Reduction in the future Greenland ice sheet surface melt with the help of solar geoengineering

Xavier Fettweis, Stefan Hofer, Roland Séférian, Charles Amory, Alison Delhasse, Sébastien Doutreloup, Christoph Kittel, Charlotte Lang, Joris Van Bever, Florent Veillon, and Peter Irvine

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Cited articles

Delhasse, A., Hanna, E., Kittel, C., and Fettweis, X.: Brief communication: CMIP6 does not suggest any atmospheric blocking increase in summer over Greenland by 2100, Int. J. Climatol., 41, 2589–2596, https://doi.org/10.1002/joc.6977, 2021. 
Feldmann, J., Levermann, A., and Mengel, M.: Stabilizing the West Antarctic Ice Sheet by surface mass deposition, Sci. Adv., 5, eaaw4132, https://doi.org/10.1126/sciadv.aaw4132, 2019. 
Fettweis, X.: TC, Greenland ice sheet and geoengineering: MAR outputs, Zenodo [data set], https://doi.org/10.5281/zenodo.5024965, 2021. 
Fettweis, X., Franco, B., Tedesco, M., van Angelen, J. H., Lenaerts, J. T. M., van den Broeke, M. R., and Gallée, H.: Estimating the Greenland ice sheet surface mass balance contribution to future sea level rise using the regional atmospheric climate model MAR, The Cryosphere, 7, 469–489, https://doi.org/10.5194/tc-7-469-2013, 2013. 
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Short summary
Without any reduction in our greenhouse gas emissions, the Greenland ice sheet surface mass loss can be brought in line with a medium-mitigation emissions scenario by reducing the solar downward flux at the top of the atmosphere by 1.5 %. In addition to reducing global warming, these solar geoengineering measures also dampen the well-known positive melt–albedo feedback over the ice sheet by 6 %. However, only stronger reductions in solar radiation could maintain a stable ice sheet in 2100.
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