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A recent volcanic eruption beneath the West Antarctic ice sheet

Abstract

Indirect evidence suggests that volcanic activity occurring beneath the West Antarctic ice sheet influences ice flow and sheet stability1,2,3. However, only volcanoes that protrude through the ice sheet4 and those inferred from geophysical techniques1,2 have been mapped so far. Here we analyse radar data from the Hudson Mountains, West Antarctica5, that contain reflections from within the ice that had previously been interpreted erroneously as the ice-sheet bed. We show that the reflections are present within an elliptical area of about 23,000 km2 that contains tephra from an explosive volcanic eruption. The tephra layer is thickest at a subglacial topographic high, which we term the Hudson Mountains Subglacial Volcano. The layer depth dates the eruption at 207 BC±240 years, which matches exceptionally strong but previously unattributed conductivity signals in nearby ice cores. The layer contains 0.019–0.31 km3 of tephra, which implies a volcanic explosive index of 3–4. Production and episodic release of water from the volcano probably affected ice flow at the time of the eruption. Ongoing volcanic heat production may have implications for contemporary ice dynamics in this glacial system.

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Figure 1: Distribution and interpretation of airborne radar data.
Figure 2: Terrain-corrected radar echogram (vertical exaggeration×35) for flight segment A–A shown in Fig. 1.
Figure 3: The relative reflected power of the tephra-layer echo for a section of profile A–A shown in Fig. 2, calculated for individual radar traces (crosses).

References

  1. Blankenship, D. D. et al. Active volcanism beneath the West Antarctic ice sheet and implications for ice-sheet stability. Nature 361, 526–529 (1993).

    Article  Google Scholar 

  2. Behrendt, J. C., Finn, C. A., Blankenship, D. D. & Bell, R. E. Aeromagnetic evidence for a volcanic caldera complex beneath the divide of the West Antarctic ice sheet. Geophys. Res. Lett. 25, 4385–4388 (1998).

    Article  Google Scholar 

  3. Vogel, S. W. & Tulaczyk, S. Ice-dynamical constraints on the existence and impact of subglacial volcanism on West Antarctic ice sheet stability. Geophys. Res. Lett. 33, L23502 (2006).

    Article  Google Scholar 

  4. Wilch, T. I., McIntosh, W. C. & Dunbar, N. W. Late Quaternary volcanic activity in Marie Byrd Land: Potential Ar-40/Ar-39-dated time horizons in West Antarctic ice and marine cores. Geol. Soc. Am. Bull. 111, 1563–1580 (1999).

    Article  Google Scholar 

  5. Vaughan, D. G. et al. New boundary conditions for the West Antarctic ice sheet: Subglacial topography beneath Pine Island Glacier. Geophys. Res. Lett. 33, L09501 (2006).

    Google Scholar 

  6. Shapiro, N. M. & Ritzwoller, M. H. Inferring surface heat flux distributions guided by a global seismic model: particular application to Antarctica. Earth Planet. Sci. Lett. 223, 213–224 (2004).

    Article  Google Scholar 

  7. Winberry, J. P. & Anandakrishnan, S. Crustal structure of the West Antarctic rift system and Marie Byrd Land hotspot. Geology 32, 977–980 (2004).

    Article  Google Scholar 

  8. Behrendt, J. C., Blankenship, D. D., Morse, D. L. & Bell, R. E. Shallow-source aeromagnetic anomalies observed over the West Antarctic Ice Sheet compared with coincident bed topography from radar ice sounding—new evidence for glacial “removal” of subglacially erupted late Cenozoic rift-related volcanic edifices. Glob. Planet. Change 42, 177–193 (2004).

    Article  Google Scholar 

  9. Winberry, J. P. & Anandakrishnan, S. Seismicity and neotectonics of West Antarctica. Geophys. Res. Lett. 30, 1931 (2003).

    Article  Google Scholar 

  10. Welch, B. C. & Jacobel, R. W. Analysis of deep-penetrating radar surveys of West Antarctica, US-ITASE 2001. Geophys. Res. Lett. 30, 1444 (2003).

    Article  Google Scholar 

  11. Rowley, P. D., Laudon, T. S., La Prade, K. E. & LeMasurier, W. E. in Volcanoes of the Antarctic Plate and Southern Oceans (eds LaMasurier, W. E. & Thomson, J. W.) 289–293 (American Geophysical Union, Washington, 1986).

    Google Scholar 

  12. Holt, J. W. et al. New boundary conditions for the West Antarctic ice sheet: Subglacial topography beneath Thwaites and Smith glaciers. Geophys. Res. Lett. 33, L09502 (2006).

    Article  Google Scholar 

  13. Crabtree, R. D. & Doake, C. S. M. Pine Island Glacier and its drainage basin: Results from radio echo-sounding. Ann. Glaciol. 3, 65–70 (1982).

    Article  Google Scholar 

  14. Lythe, M., Vaughan, D. G. & The BEDMAP Consortium, BEDMAP: A new ice thickness and subglacial topographic model of Antarctica. J. Geophys. Res. 106, 11335–11352 (2001).

    Article  Google Scholar 

  15. Thomas, R. et al. Accelerated sea-level rise from West Antarctica. Science 306, 255–258 (2004).

    Article  Google Scholar 

  16. Rignot, E. et al. Improved estimate of the mass balance of glaciers draining into the Amundsen Sea of West Antarctica from CECS/NASA 2002 campaign. Ann. Glaciol. 39, 231–237 (2004).

    Article  Google Scholar 

  17. Paterson, W. S. B. The Physics of Glaciers (Elsevier, Oxford, 1994).

    Google Scholar 

  18. Arthern, R. J., Winebrenner, D. P. & Vaughan, D. G. Antarctic snow accumulation mapped using polarization of 4.3 cm wavelength microwave emission. J. Geophys. Res. 111, D06107 (2006).

    Article  Google Scholar 

  19. Papale, P. & Rosi, M. A case of no-wind Plinian fallout at Pululagua Caldera (Ecuador)—Implications for models of clast dispersal. Bull. Volcanol. 55, 523–535 (1993).

    Article  Google Scholar 

  20. Pyle, D. M. The thickness, volume and grainsize of tephra fall deposits. Bull. Volcanol. 51, 1–15 (1989).

    Article  Google Scholar 

  21. Siebert, L. & Simkin, T. Volcanoes of the World: An Illustrated Catalog of Holocene Volcanoes and their Eruptions (http://www.volcano.si.edu/world/) (Smithsonian Institution, Washington, 2002).

  22. Haran, T., Bohlander, J., Scambos, T., Fahnestock, M. & compilers, MODIS Mosaic of Antarctica (MOA) Image Map: Digital Media (National Snow and Ice Data Center, Boulder, 2005).

    Google Scholar 

  23. Gudmundsson, M. T., Sigmundsson, F. & Bjornsson, H. Ice–volcano interaction of the 1996 Gjalp subglacial eruption, Vatnajokull, Iceland. Nature 389, 954–957 (1997).

    Article  Google Scholar 

  24. Icelandic Meteorological Office. <http://hraun.vedur.is/ hs/myndir/vinna/vinna/Grimsvotn_report_November4.doc> (Reykavik, Iceland, 2004).

  25. Hammer, C. U., Clausen, H. B. & Langway, C. C. 50,000 years of recorded global volcanism. Clim. Change 35, 1–15 (1997).

    Article  Google Scholar 

  26. Kurbatov, A. V. et al. A 12,000 year record of explosive volcanism in the Siple Dome Ice Core, West Antarctica. J. Geophys. Res. 111, D12307 (2006).

    Article  Google Scholar 

  27. Joughin, I., Rignot, E., Rosanova, C. E., Lucchitta, B. K. & Bohlander, J. Timing of recent accelerations of Pine Island Glacier, Antarctica. Geophys. Res. Lett. 30, 1706 (2003).

    Google Scholar 

  28. Shepherd, A., Wingham, D. J. & Mansley, J. A. D. Inland thinning of the Amundsen Sea sector, West Antarctica. Geophys. Res. Lett. 29, 1364 (2002).

    Article  Google Scholar 

  29. Stenoien, M. D. & Bentley, C. R. Pine Island Glacier, Antarctica: A study of the catchment using interferometric synthetic aperture radar measurements and radar altimetry. J. Geophys. Res. 105, 21761–21779 (2000).

    Article  Google Scholar 

  30. Shepherd, A., Wingham, D. J. & Rignot, E. Warm ocean is eroding West Antarctic Ice Sheet. Geophys. Res. Lett. 31, L23402 (2004).

    Article  Google Scholar 

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Acknowledgements

The field campaign received logistical support from the British Antarctic Survey and US National Science Foundation and was conducted in collaboration with the University of Texas. We acknowledge the support from field personnel who assisted us, and discussions from many researchers who improved the manuscript.

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H.F.J.C and D.G.V. contributed equally to this work.

Corresponding author

Correspondence to Hugh F. J. Corr.

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Supplementary table S1 (PDF 272 kb)

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Corr, H., Vaughan, D. A recent volcanic eruption beneath the West Antarctic ice sheet. Nature Geosci 1, 122–125 (2008). https://doi.org/10.1038/ngeo106

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