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Greenland meltwater storage in firn limited by near-surface ice formation - Nature Climate Change

  • ️van de Wal, Roderik S. W.
  • ️Mon Jan 04 2016
  • Letter
  • Published: 04 January 2016

Nature Climate Change volume 6, pages 390–393 (2016)Cite this article

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Abstract

Approximately half of Greenland’s current annual mass loss is attributed to runoff from surface melt1. At higher elevations, however, melt does not necessarily equal runoff, because meltwater can refreeze in the porous near-surface snow and firn2. Two recent studies suggest that all3 or most3,4 of Greenland’s firn pore space is available for meltwater storage, making the firn an important buffer against contribution to sea level rise for decades to come3. Here, we employ in situ observations and historical legacy data to demonstrate that surface runoff begins to dominate over meltwater storage well before firn pore space has been completely filled. Our observations frame the recent exceptional melt summers in 2010 and 2012 (refs 5,6), revealing significant changes in firn structure at different elevations caused by successive intensive melt events. In the upper regions (more than ∼1,900 m above sea level), firn has undergone substantial densification, while at lower elevations, where melt is most abundant, porous firn has lost most of its capability to retain meltwater. Here, the formation of near-surface ice layers renders deep pore space difficult to access, forcing meltwater to enter an efficient7 surface discharge system and intensifying ice sheet mass loss earlier than previously suggested3.

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References

  1. van den Broeke, M. et al. Partitioning recent Greenland mass loss. Science 326, 984–986 (2009).

    Article  CAS  Google Scholar 

  2. Pfeffer, W., Meier, M. & Illangasekare, T. H. Retention of Greenland runoff by refreezing: implications for projected future sea level change. J. Geophys. Res. 96, 22117–22124 (1991).

    Article  Google Scholar 

  3. Harper, J., Humphrey, N., Pfeffer, W. T., Brown, J. & Fettweis, X. Greenland ice-sheet contribution to sea-level rise buffered by meltwater storage in firn. Nature 491, 240–243 (2012).

    Article  CAS  Google Scholar 

  4. vanAngelen, J. H., Lenaerts, J. T. M., van den Broeke, M. R., Fettweis, X. & van Meijgaard, E. Rapid loss of firn pore space accelerates 21st century Greenland mass loss. Geophys. Res. Lett. 40, 2109–2113 (2013).

    Article  Google Scholar 

  5. Nghiem, S. V. et al. The extreme melt across the Greenland ice sheet in 2012. Geophys. Res. Lett. 39, L20502 (2012).

    Article  Google Scholar 

  6. van As, D. et al. Large surface meltwater discharge from the Kangerlussuaq sector of the Greenland ice sheet during the record-warm year 2010 explained by detailed energy balance observations. Cryosphere 6, 199–209 (2012).

    Article  Google Scholar 

  7. Smith, L. C. et al. Efficient meltwater drainage through supraglacial streams and rivers on the southwest Greenland ice sheet. Proc. Natl Acad. Sci. USA 112, 1001–1006 (2015).

    Article  CAS  Google Scholar 

  8. Herron, M. & Langway, J. C. Firn densification: an empirical model. J. Glaciol. 25, 373–385 (1980).

    Article  Google Scholar 

  9. Brown, J., Harper, J., Pfeffer, W., Humphrey, N. F. & Bradford, J. High resolution study of layering within the percolation and soaked facies of the Greenland ice sheet. Ann. Glaciol. 52, 35–41 (2011).

    Article  Google Scholar 

  10. Colbeck, S. C. A study of glacier flow for an open-pit mine: an exercise in applied glaciology. J. Glaciol. 13, 401–414 (1974).

    Article  Google Scholar 

  11. Forster, R. R. et al. Extensive liquid meltwater storage in firn within the Greenland ice sheet. Nature Geosci. 7, 95–98 (2013).

    Article  Google Scholar 

  12. Benson, C. S. Stratigraphic Studies in the Snow and Firn of the Greenland Ice Sheet Res. Rep. 70, reprint (US Army Corps of Engineers, Snow, Ice and Permafrost Research Establishment, 1996).

  13. Pfeffer, W. & Humphrey, N. F. Formation of ice layers by infiltration and refreezing of meltwater. Ann. Glaciol. 26, 83–91 (1998).

    Article  Google Scholar 

  14. Humphrey, N. F., Harper, J. T. & Pfeffer, W. T. Thermal tracking of meltwater retention in Greenland’s accumulation area. J. Geophys. Res. 117, F01010 (2012).

    Article  Google Scholar 

  15. Van de Wal, R. S. W. et al. Twenty-one years of mass balance observations along the K-transect, West Greenland. Earth Syst. Sci. Data 4, 31–35 (2012).

    Article  Google Scholar 

  16. Mosley-Thompson, E. et al. Local to regional-scale variability of annual net accumulation on the Greenland ice sheet from PARCA cores. J. Geophys. Res. 106, 33839–33851 (2001).

    Article  Google Scholar 

  17. Tedesco, M. et al. Evidence and analysis of 2012 Greenland records from spaceborne observations, a regional climate model and reanalysis data. Cryosphere 7, 615–630 (2013).

    Article  Google Scholar 

  18. Koenig, L. S., Miège, C., Forster, R. R. & Brucker, L. Initial in situ measurements of perennial meltwater storage in the Greenland firn aquifer. Geophys. Res. Lett. 41, 81–85 (2014).

    Article  Google Scholar 

  19. Bezeau, P., Sharp, M., Burgess, D. & Gascon, G. Firn profile changes in response to extreme 21st-century melting at Devon Ice Cap, Nunavut, Canada. J. Glaciol. 59, 981–991 (2013).

    Article  Google Scholar 

  20. Zdanowicz, C. et al. Summer melt rates on Penny Ice Cap, Baffin Island: past and recent trends and implications for regional climate. J. Geophys. Res. 117, F02006 (2012).

    Article  Google Scholar 

  21. Gascon, G., Sharp, M. J., Burgess, D. O., Bezeau, P. & Bush, A. Changes in accumulation area firn stratigraphy and meltwater flow during a period of climate warming, Devon Ice Cap, Nunavut, Canada. J. Geophys. Res. 118, 2380–2391 (2013).

    Article  Google Scholar 

  22. de la Peña, S. et al. Changes in the firn structure of the western Greenland Ice Sheet caused by recent warming. Cryosphere 9, 1203–1211 (2015).

    Article  Google Scholar 

  23. IPCC Climate Change 2013: The Physical Science Basis (eds Stocker, T. F. et al.) (Cambridge Univ. Press, 2013).

  24. McGrath, D., Colgan, W., Bayou, N., Muto, A. & Steffen, K. Recent warming at summit, Greenland: global context and implications. Geophys. Res. Lett. 40, 2091–2096 (2013).

    Article  Google Scholar 

  25. Liang, Y. et al. A decadal investigation of supraglacial lakes in West Greenland using a fully automatic detection and tracking algorithm. Remote Sens. Environ. 123, 127–138 (2012).

    Article  Google Scholar 

  26. Howat, I. M., Negrete, A. & Smith, B. E. The Greenland Ice Mapping Project (GIMP) land classification and surface elevation data sets. Cryosphere 8, 1509–1518 (2014).

    Article  Google Scholar 

  27. Lindbäck, K. et al. Subglacial water drainage, storage, and piracy beneath the Greenland ice sheet. Geophys. Res. Lett. 42, 7606–7614 (2015).

    Article  Google Scholar 

  28. Machguth, H., Purves, R. S., Oerlemans, J., Hölzle, M. & Paul, F. Exploring uncertainty in glacier mass balance modelling with Monte Carlo simulation. Cryosphere 2, 191–204 (2008).

    Article  Google Scholar 

  29. Kameda, T. et al. Melt features in ice cores from Site J, southern Greenland: some implications for summer climate since AD 1550. Ann. Glaciol. 21, 51–58 (1995).

    Article  Google Scholar 

Download references

Acknowledgements

This work is supported by the US National Aeronautics and Space Administration (NASA) Grant no. NNX10AR76G, ‘Comprehensive Assessment of Ice Sheet Contributions to Sea Level Based on Integrated Remote Sensing Observations’, by the Greenland Analogue Project (GAP), funded by Svensk Kärnbränslehantering AB, Sweden, Posiva Oy, Finland, and NWMO, Canada, the Refreeze Project funded by GEUS, the RETAIN project, funded by the Danish Council for Independent research (Grant no. 4002-00234) and the Programme for Monitoring of the Greenland Ice Sheet (PROMICE), funded by The Danish Energy Agency DANCEA programme. Collection and analyses of the legacy cores was supported by NASA’s PARCA Program. The K-transect programme has been funded by Utrecht University, the Netherlands Polar Program of NWO/ALW and a Spinoza grant. This publication is contribution number 62 of the Nordic Centre of Excellence SVALI, ‘Stability and Variations of Arctic Land Ice’, funded by the Nordic Top-level Research Initiative (TRI). The authors acknowledge field assistance by K. Alley, A. Crawford, S. Doyle, M. Eijkelboom, S. Grigsby, D. Hill, A. Heilig, A. Hubbard, K. Lindbäck, R. Petterson and M. Stevens as well as logistical contributions from W. Abdalati, R. Bauer, A. Hubbard and T. Scambos. Satellite imagery in Supplementary Fig. 1 is subject to copyright by European Space Imaging/DigitalGlobe.

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Author notes

  1. Horst Machguth

    Present address: Present address: Department of Geography, University of Zurich, 8057 Zurich, Switzerland.,

Authors and Affiliations

  1. Geological Survey of Denmark and Greenland GEUS, 1350 København K, Denmark

    Horst Machguth, Dirk van As, Jason E. Box, Charalampos Charalampidis, William Colgan & Robert S. Fausto

  2. Arctic Technology Centre ARTEK, Technical University of Denmark, 2800 Kgs. Lyngby, Denmark

    Horst Machguth

  3. Cooperative Institute for Research in Environmental Sciences (CIRES), University of Colorado at Boulder, Boulder, Colorado 80309, USA

    Mike MacFerrin

  4. Department of Earth Sciences, Uppsala University, 752 36 Uppsala, Sweden

    Charalampos Charalampidis

  5. Department of Earth and Space Science and Engineering, York University, Toronto, Ontario M3J 1P3, Canada

    William Colgan

  6. Centre for Isotope Research (CIO), Energy and Sustainability Research Institute Groningen (ESRIG), University of Groningen, 9747AG Groningen, The Netherlands

    Harro A. J. Meijer

  7. Byrd Polar and Climate Research Center and Department of Geography, The Ohio State University, Columbus, Ohio 43210, USA

    Ellen Mosley-Thompson

  8. Institute for Marine and Atmospheric Research Utrecht (IMAU), University of Utrecht, 3584CC Utrecht, The Netherlands

    Roderik S. W. van de Wal

Authors

  1. Horst Machguth

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  2. Mike MacFerrin

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  3. Dirk van As

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  4. Jason E. Box

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  5. Charalampos Charalampidis

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  6. William Colgan

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  7. Robert S. Fausto

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  8. Harro A. J. Meijer

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  9. Ellen Mosley-Thompson

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  10. Roderik S. W. van de Wal

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Contributions

H.M. conceived the study; M.M., D.v.A. and H.M. collaboratively designed and planned the field campaigns in which M.M., H.M., D.v.A., C.C. and W.C. participated; H.M., M.M., D.v.A., J.E.B., C.C., W.C., R.S.F. and E.M.-T. performed the data analysis; E.M.-T., R.S.W.v.d.W. and H.A.J.M. prepared and provided additional data. H.M. and M.M. wrote the manuscript; all authors continuously discussed the results and developed the analysis further.

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Correspondence to Horst Machguth.

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Machguth, H., MacFerrin, M., van As, D. et al. Greenland meltwater storage in firn limited by near-surface ice formation. Nature Clim Change 6, 390–393 (2016). https://doi.org/10.1038/nclimate2899

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  • Received: 07 April 2015

  • Accepted: 17 November 2015

  • Published: 04 January 2016

  • Issue Date: April 2016

  • DOI: https://doi.org/10.1038/nclimate2899

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