Worldwide glacier retreat and associated future runoff changes raise major concerns over the sustainability of global water resources1,2,3,4, but global-scale assessments of glacier decline and the resulting hydrological consequences are scarce5,6. Here we compute global glacier runoff changes for 56 large-scale glacierized drainage basins to 2100 and analyse the glacial impact on streamflow. In roughly half of the investigated basins, the modelled annual glacier runoff continues to rise until a maximum (‘peak water’) is reached, beyond which runoff steadily declines. In the remaining basins, this tipping point has already been passed. Peak water occurs later in basins with larger glaciers and higher ice-cover fractions. Typically, future glacier runoff increases in early summer but decreases in late summer. Although most of the 56 basins have less than 2% ice coverage, by 2100 one-third of them might experience runoff decreases greater than 10% due to glacier mass loss in at least one month of the melt season, with the largest reductions in central Asia and the Andes. We conclude that, even in large-scale basins with minimal ice-cover fraction, the downstream hydrological effects of continued glacier wastage can be substantial, but the magnitudes vary greatly among basins and throughout the melt season.
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Barnett, T. P., Adam, J. C. & Lettenmaier, D. P. Potential impacts of a warming climate on water availability in snow-dominated regions. Nature 438, 303–309 (2005).
Immerzeel, W. W., van Beek, L. P. H. & Bierkens, M. F. P. Climate change will affect the Asian water towers. Science 328, 1382–1385 (2010).
Kaser, G., Grosshauser, M. & Marzeion, B. Contribution potential of glaciers to water availability in different climate regimes. Proc. Natl Acad. Sci. USA 107, 20223–20227 (2010).
Pritchard, H. D. Asia’s glaciers are a regionally important buffer against drought. Nature 545, 169–174 (2017).
Bliss, A., Hock, R. & Radić, V. Global response of glacier runoff to twenty-first century climate change. J. Geophys. Res. Earth Surf. 119, 717–730 (2014).
Radić, V. & Hock, R. Glaciers in the Earth’s hydrological cycle: assessments of glacier mass and runoff changes on global and regional scales. Surv. Geophys. 35, 813–837 (2014).
Beniston, M. Climatic change in mountain regions: a review of possible impacts. Clim. Chang. 59, 5–31 (2003).
Xu, J. et al. The melting Himalayas: cascading effects of climate change on water, biodiversity, and livelihoods. Conserv. Biol. 23, 520–530 (2009).
Marzeion, B., Jarosch, A. H. & Hofer, M. Past and future sea-level change from the surface mass balance of glaciers. Cryosphere 6, 1295–1322 (2012).
Radić, V. et al. Regional and global projections of twenty-first century glacier mass changes in response to climate scenarios from global climate models. Clim. Dyn. 42, 37–58 (2014).
Huss, M. & Hock, R. A new model for global glacier change and sea-level rise. Frontiers in Earth Science 3, 54 (2015).
Gleick, P. H. & Palaniappan, M. Peak water limits to freshwater withdrawal and use. Proc. Natl Acad. Sci. USA 107, 11155–11162 (2010).
Jansson, P., Hock, R. & Schneider, T. The concept of glacier storage—a review. J. Hydrol. 282, 116–129 (2003).
Immerzeel, W. W., Pellicciotti, F. & Bierkens, M. F. P. Rising river flows throughout the twenty-first century in two Himalayan glacierized watersheds. Nat. Geosci. 6, 742–745 (2013).
Ragettli, S., Immerzeel, W. W. & Pellicciotti, F. Contrasting climate change impact on river flows from high-altitude catchments in the Himalayan and Andes Mountains. Proc. Natl. Acad. Sci. USA 113, 9222–9227 (2016).
Sorg, A., Huss, M., Rohrer, M. & Stoffel, M. The days of plenty might soon be over in glacierized Central Asian catchments. Environ. Res. Lett. 9, 104018 (2014).
Duethmann, D., Menz, C., Jiang, T. & Vorogushyn, S. Projections for headwater catchments of the Tarim River reveal glacier retreat and decreasing surface water availability but uncertainties are large. Environ. Res. Lett. 11, 054024 (2016).
Juen, I., Kaser, G. & Georges, C. Modelling observed and future runoff from a glacierized tropical catchment (Cordillera Blanca, Perú). Glob. Planet. Chang. 59, 37–48 (2007).
Baraer, M. et al. Glacier recession and water resources in Peru’s Cordillera Blanca. J. Glaciol. 58, 134–150 (2012).
Frans, C. et al. Implications of decadal to century scale glacio-hydrological change for water resources of the Hood River basin, OR, USA. Hydrol. Process. 30, 4314–4329 (2016).
Lambrecht, A. & Mayer, C. Temporal variability of the non-steady contribution from glaciers to water discharge in western Austria. J. Hydrol. 376, 353–361 (2009).
Comeau, L. E. L., Pietroniro, A. & Demuth, M. N. Glacier contribution to the North and South Saskatchewan Rivers. Hydrol. Process. 23, 2640–2653 (2009).
Neal, E. G., Hood, E. & Smikrud, K. Contribution of glacier runoff to freshwater discharge into the Gulf of Alaska. Geophys. Res. Lett. 37, L06404 (2010).
Huss, M. Present and future contribution of glacier storage change to runoff from macroscale drainage basins in Europe. Water Resour. Res. 47, W07511 (2011).
Schaner, N., Voisin, N., Nijssen, B. & Lettenmaier, D. P. The contribution of glacier melt to streamflow. Environ. Res. Lett. 7, 034029 (2012).
Stahl, K., Moore, R. D., Shea, J. M., Hutchinson, D. & Cannon, A. J. Coupled modelling of glacier and streamflow response to future climate scenarios. Water Resour. Res. 44, W02422 (2008).
Farinotti, D., Usselmann, S., Huss, M., Bauder, A. & Funk, M. Runoff evolution in the Swiss Alps: projections for selected high-alpine catchments based on ENSEMBLES scenarios. Hydrol. Process. 26, 1909–1924 (2012).
Lutz, A., Immerzeel, W., Shrestha, A. & Bierkens, M. Consistent increase in High Asia’s runoff due to increasing glacier melt and precipitation. Nat. Clim. Chang. 4, 587–592 (2014).
Kundzewicz, Z. W. et al. The implications of projected climate change for freshwater resources and their management. Hydrol. Sci. J. 53, 3–10 (2008).
Carey, M. et al. Impacts of glacier recession and declining meltwater on mountain societies. Ann. Am. Assoc. Geogr. 107, 350–359 (2017).
Arendt, A. et al. Randolph Glacier Inventory—a dataset of global glacier outlines: Version 4.0 Global Land Ice Measurements from Space (Digital Media, 2014).
Jarvis, J., Reuter, H., Nelson, A. & Guevara, E. SRTM 90m Digital Elevation Data Version 4 (CGIAR-CSI, 2008); http://srtm.csi.cgiar.org
Tachikawa, T., Hato, M., Kaku, M. & Iwasaki, A. Characteristics of ASTER GDEM version 2 Geoscience and Remote Sensing Symposium (IGARSS) 3657–3660 (IEEE, New York, 2011).
Huss, M. & Farinotti, D. Distributed ice thickness and volume of all glaciers around the globe. J. Geophys. Res. 117, F04010 (2012).
Major River Basins of the World (Global Runoff Data Centre, 2007); www.bafg.de/GRDC/
Long-Term Mean Monthly Discharges and Annual Characteristics of GRDC Stations (Global Runoff Data Centre, accessed 17 July 2016).
Fekete, B., Vörösmarty, C. & Grabs, W. High-resolution fields of global runoff combining observed river discharge and simulated water balances. Glob. Biogeochem. Cycles 16, 15-1–15-10 (2002).
Fekete, B. & Vörösmarty, C. ISLSCP II UNH/GRDC Composite Monthly Runoff (2011); http://dx.doi.org/10.3334/ORNLDAAC/994
Dee, D. P. et al. The ERA-Interim reanalysis: configuration and performance of the data assimilation system. Q. J. R. Meteorol. Soc. 137, 553–597 (2011).
Taylor, K. E., Stouffer, R. J. & Meehl, G. A. An Overview of CMIP5 and the experiment design. Bull. Am. Meteorol. Soc. 93, 485–498 (2012).
Meinshausen, M. et al. The RCP greenhouse gas concentrations and their extensions from1765 to 2300. Clim. Chang. 109, 213–241 (2011).
Cogley, J. et al. Glossary of Glacier Mass Balance and Related Terms Technical Documents in Hydrology No. 86 (IACS, 2011).
Oerlemans, J. & Nick, F. M. A minimal model of a tidewater glacier. Ann. Glaciol. 42, 1–6 (2005).
Huss, M., Jouvet, G., Farinotti, D. & Bauder, A. Future high-mountain hydrology: a new parameterization of glacier retreat. Hydrol. Earth Syst. Sci. 14, 815–829 (2010).
Gardner, A. S. et al. A reconciled estimate of glacier contributions to sea level rise: 2003 to 2009. Science 340, 852–857 (2013).
WGMS. Fluctuations of Glaciers, 2005–2010 Vol. 10 (World Glacier Monitoring Service, 2012).
Nieuwenhuyse, E. V. Empirical model for predicting a catchment-scale metric of surface water transit time in streams. Can. J. Fish. Aquat. Sci. 62, 492–504 (2005).
Milly, P. C. D., Dunne, K. A. & Vecchia, A. V. Global pattern of trends in streamflow and water availability in a changing climate. Nature 438, 347–350 (2005).
Piao, S. et al. Changes in climate and land use have a larger direct impact than rising CO2 on global river runoff trends. Proc. Natl Acad. Sci. USA 104, 15242–15247 (2007).
Gabbi, J., Farinotti, D., Bauder, A. & Maurer, H. Ice volume distribution and implications on runoff projections in a glacierized catchment. Hydrol. Earth Syst. Sci. 16, 4543–4556 (2012).
Farinotti, D. et al. How accurate are estimates of glacier ice thickness? Results from ITMIX, the Ice Thickness Models Intercomparison eXperiment. Cryosphere 11, 949–970 (2017).
Bahr, D. B., Meier, M. F. & Peckham, S. D. The physical basis of glacier volume-area scaling. J. Geophys. Res. 102, 20355–20362 (1997).
We thank the Randolph Glacier Inventory consortium for providing global glacier inventory data, the European Centre for Medium-range Weather Forecasts for the ERA-interim Reanalysis and the GRDC for discharge data and drainage-basin outlines. We acknowledge the World Climate Research Programme’s Working Group on Coupled Modelling, which is responsible for CMIP, and we thank the climate modelling groups (listed in Supplementary Table 2) for producing and making available their model output. R.H acknowledges funding from grants from the National Aeronautics and Space Administration (NNX17AB27G and NNX11AO23G). A. Aschwanden, D. Farinotti, A. Johnsson, D. Rounce and M. Truffer commented on a previous version of the manuscript.
The authors declare that they have no competing financial interests.
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Huss, M., Hock, R. Global-scale hydrological response to future glacier mass loss. Nature Clim Change 8, 135–140 (2018). https://doi.org/10.1038/s41558-017-0049-x
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