Perspective | Published:

Choosing the future of Antarctica

Naturevolume 558pages233241 (2018) | Download Citation

Abstract

We present two narratives on the future of Antarctica and the Southern Ocean, from the perspective of an observer looking back from 2070. In the first scenario, greenhouse gas emissions remained unchecked, the climate continued to warm, and the policy response was ineffective; this had large ramifications in Antarctica and the Southern Ocean, with worldwide impacts. In the second scenario, ambitious action was taken to limit greenhouse gas emissions and to establish policies that reduced anthropogenic pressure on the environment, slowing the rate of change in Antarctica. Choices made in the next decade will determine what trajectory is realized.

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References

  1. 1.

    Intergovernmental Panel on Climate Change (IPCC) Climate Change 2013: The Physical Science Basis. Contribution of Working Group I to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change (eds Stocker, T. F. et al.) (Cambridge Univ. Press, 2013). The latest comprehensive assessment of the state and future of the climate system, based on observations and Earth system models

  2. 2.

    Frölicher, T. L. et al. Dominance of the Southern Ocean in anthropogenic carbon and heat uptake in CMIP5 models. J. Clim. 28, 862–886 (2015).

  3. 3.

    Armour, K. C., Marshall, J., Scott, J. R., Donohoe, A. & Newsom, E. R. Southern Ocean warming delayed by circumpolar upwelling and equatorward transport. Nat. Geosci. 9, 549–554 (2016).

  4. 4.

    Sarmiento, J. L., Gruber, N., Brzezinski, M. & Dunne, J. P. High-latitude controls of thermocline nutrients and low latitude biological productivity. Nature 427, 56–60 (2004).

  5. 5.

    Dodds, K., Hemmings, A. D. & Roberts, P. Handbook on the Politics of Antarctica (Edward Elgar, Cheltenham, 2017). A comprehensive overview of the political arrangements for Antarctica and the Southern Ocean, their current operation, and future challenges

  6. 6.

    Chown, S. L. et al. Challenges to the future conservation of the Antarctic. Science 337, 158–159 (2012). This horizon-scanning assessment provides an inclusive examination of current and future conservation challenges for Antarctica and the Southern Ocean.

  7. 7.

    Chown, S. L. et al. Antarctica and the strategic plan for biodiversity. PLoS Biol. 15, e2001656 (2017).

  8. 8.

    Mauritsen, T. & Pincus, R. Committed warming inferred from observations. Nat. Clim. Change 7, 652–655 (2017).

  9. 9.

    Rockström, J. et al. A roadmap for rapid decarbonisation. Science 355, 1269–1271 (2017). This paper presents a roadmap to decarbonisation consistent with achieving the goals of the Paris Agreement, highlighting the necessity for fossil fuel emissions to peak by 2020.

  10. 10.

    Drijfhout, S. et al. Catalogue of abrupt shifts in Intergovernmental Panel on Climate Change climate models. Proc. Natl Acad. Sci. USA 112, E5777–E5786 (2015).

  11. 11.

    Scheffer, M., Carpenter, S. R., Dakos, V. & van Nes, E. Generic indicators of ecological resilience: inferring the chance of a critical transition. Annu. Rev. Ecol. Evol. Syst. 46, 145–167 (2015).

  12. 12.

    Pol, K. et al. Climate variability features of the last interglacial in the East Antarctic EPICA Dome C ice core. Geophys. Res. Lett. 41, 4004–4012 (2014).

  13. 13.

    Thompson, D. W. J. et al. Signatures of the Antarctic ozone hole in Southern Hemisphere surface climate change. Nat. Geosci. 4, 741–749 (2011).

  14. 14.

    Swart, N. C. & Fyfe, J. C. Observed and simulated changes in the Southern Hemisphere surface westerly wind-stress. Geophys. Res. Lett. 39, L16711 (2012).

  15. 15.

    Durack, P. J., Wijffels, S. E. & Matear, R. J. Ocean salinities reveal strong global water cycle intensification during 1950 to 2000. Science 336, 455–458 (2012).

  16. 16.

    Haumann, F. A., Gruber, N., Münnich, M., Frenger, I. & Kern, S. Sea-ice transport driving Southern Ocean salinity and its recent trends. Nature 537, 89–92 (2016).

  17. 17.

    Jacobs, S., Giulivi, C. & Mele, P. Freshening of the Ross Sea during the late 20th century. Science 297, 386–389 (2002).

  18. 18.

    Purkey, S. G. & Johnson, G. C. Warming of global abyssal and deep Southern Ocean waters between the 1990s and 2000s: contributions to global heat and sea level rise budgets. J. Clim. 23, 6336–6351 (2010).

  19. 19.

    van Wijk, E. M. & Rintoul, S. R. Freshening drives contraction of Antarctic Bottom Water in the Australian Antarctic Basin. Geophys. Res. Lett. 41, 1657–1664 (2014).

  20. 20.

    Cai, W. Antarctic ozone depletion causes an intensification of the Southern Ocean super-gyre circulation. Geophys. Res. Lett. 33, L03712 (2006).

  21. 21.

    Sallée, J. B. et al. Assessment of Southern Ocean water mass circulation in CMIP5 models: historical bias and forcing response. J. Geophys. Res. 118, 1830–1844 (2013).

  22. 22.

    Hauri, C., Friedrich, T. & Timmermann, A. Abrupt onset and prolongation of aragonite undersaturation events in the Southern Ocean. Nat. Clim. Change 6, 172–176 (2016).

  23. 23.

    Schmidtko, S. et al. Multi-decadal warming of Antarctic waters. Science 346, 1227–1231 (2014). This paper summarises changes observed in the Southern Ocean in recent decades, showing that continental shelf waters have warmed in the Amundsen Sea and driven thinning of ice shelves and retreat of grounding lines in this sector.

  24. 24.

    Mercer, J. H. West Antarctic ice sheet and CO2 greenhouse effect: a threat of disaster. Nature 271, 321–325 (1978).

  25. 25.

    Favier, L. et al. Retreat of Pine Island Glacier controlled by marine ice-sheet instability. Nat. Clim. Change 4, 117–121 (2014).

  26. 26.

    Joughin, I., Smith, B. E. & Medley, B. Marine ice sheet collapse potentially under way for the Thwaites Glacier basin, West Antarctica. Science 344, 735–738 (2014). Ice sheet model simulations suggest that unstable retreat of the Thwaites Glacier, the largest drainage of the West Antarctic Ice Sheet, is already underway, although the timing of full collapse is uncertain.

  27. 27.

    Rignot, E., Mouginot, J., Morlighem, M., Seroussi, H. & Scheuchl, B. Widespread, rapid grounding line retreat of Pine Island, Thwaites, Smith, and Kohler glaciers, West Antarctica, from 1992 to 2011. Geophys. Res. Lett. 41, 3502–3509 (2014). Satellite observations show that the grounding lines of the primary glaciers draining the West Antarctic Ice Sheet have retreated over the past two decades.

  28. 28.

    Phillips, H. A. Surface meltstreams on the Amery Ice Shelf, East Antarctica. Ann. Glaciol. 27, 177–181 (1998).

  29. 29.

    Trusel, L. D. et al. Divergent trajectories of Antarctic surface melt under two twenty-first-century climate scenarios. Nat. Geosci. 8, 927–932 (2015).

  30. 30.

    Kingslake, J., Ely, J. C., Das, I. & Bell, R. E. Widespread movement of meltwater onto and across Antarctic ice shelves. Nature 544, 349–352 (2017).

  31. 31.

    Lenaerts, J. T. M. et al. Meltwater produced by wind-albedo interaction stored in an East Antarctic ice shelf. Nat. Clim. Change 7, 58–62 (2017).

  32. 32.

    Scambos, T., Hulbe, C. & Fahnestock, M. in Antarctic Peninsula Climate Variability: Historical and Paleoenvironmental Perspectives (eds Domack, E. et al.) Vol. 79, 79–92 (Antarctic Research Series, AGU, Washington, DC, 2003).

  33. 33.

    DeConto, R. M. & Pollard, D. Contribution of Antarctica to past and future sea-level rise. Nature 531, 591–597 (2016). An ice sheet model, calibrated against sea level records from past warm periods, projects rapid loss of mass from the Antarctic Ice Sheet in response to unmitigated greenhouse gas emissions and a multi-centennial commitment to 15 m of sea level rise from Antarctica.

  34. 34.

    Paolo, F. S., Fricker, H. A. & Padman, L. Volume loss from Antarctic ice shelves is accelerating. Science 348, 327–331 (2015). A multi-mission record (1994 to 2012) of ice-shelf surface height from satellite radar altimetry showed accelerated loss of volume of Antarctica’s ice shelves, with early small increases in East Antarctica due to accumulation, and substantial losses in West Antarctica, where some ice shelves thinned by up to 18% in the 18 years.

  35. 35.

    Robel, A. A. Thinning sea ice weakens buttressing force of iceberg mélange and promotes calving. Nature Commun. 8, 14596 (2017).

  36. 36.

    Rintoul, S. et al. Ocean heat drives rapid basal melt of the Totten Ice Shelf. Sci. Adv. 2, e1601610 (2016).

  37. 37.

    Hellmer, H. H., Kauker, F., Timmermann, R., Determann, J. & Rae, J. Twenty-first-century warming of a large Antarctic ice-shelf cavity by a redirected coastal current. Nature 485, 225–228 (2012).

  38. 38.

    Ross, N. et al. Steep reverse bed slope at the grounding line of the Weddell Sea sector in West Antarctica. Nat. Geosci. 5, 393–396 (2012).

  39. 39.

    Golledge, N., Levy, R. L., McKay, R. & Naish, T. East Antarctic Ice Sheet vulnerable to Weddell Sea warming. Geophys. Res. Lett. 44, 2343–2351 (2017).

  40. 40.

    Liu, Y. et al. Ocean-driven thinning enhances iceberg calving and retreat of Antarctic ice shelves. Proc. Natl Acad. Sci. USA 112, 3263–3268 (2015).

  41. 41.

    Martin-Español, A., Bamber, J. L. & Zammit-Mangion, A. Constraining the mass balance of East Antarctica. Geophys. Res. Lett. 44, 4168–4175 (2017).

  42. 42.

    Medley, B. et al. Temperature and snowfall in western Queen Maud Land increasing faster than climate model projections. Geophys. Res. Lett. 45, 1472–1480 (2018).

  43. 43.

    Nicolas, J. P. & Bromwich, D. H. Climate of West Antarctica and influence of marine air intrusions. J. Clim. 24, 49–67 (2011).

  44. 44.

    Bassis, J. N. & Walker, C. C. Upper and lower limits on the stability of calving glaciers from the yield strength envelope of ice. Proc. R. Soc. A 468, 913–931 (2012).

  45. 45.

    Golledge, N. R. et al. The multi-millennial Antarctic commitment to future sea-level rise. Nature 526, 421–425 (2015).

  46. 46.

    Winkelmann, R., Levermann, A., Ridgwell, A. & Caldeira, K. Combustion of available fossil fuel resources sufficient to eliminate the Antarctic Ice Sheet. Sci. Adv. 1, e1500589 (2015).

  47. 47.

    Feldmann, J. & Levermann, A. Collapse of the West Antarctic Ice Sheet after local destabilization of the Amundsen Basin. Proc. Natl Acad. Sci. USA 112, 14191–14196 (2015).

  48. 48.

    Dutton, A. et al. Sea-level rise due to polar ice-sheet mass loss during past warm periods. Science 349, aaa4019 (2015).

  49. 49.

    Clark, P. et al. Consequences of twenty-first-century policy for multi-millennial climate and sea-level change. Nature Clim. Change 6, 360–369 (2016)

  50. 50.

    Hallegatte, S., Green, C., Nicholls, R. J. & Jan Corfee-Morlot, J. Future flood losses in major coastal cities. Nat. Clim. Change 3, 802–806 (2013).

  51. 51.

    Holloway, M. D. et al. Antarctic last interglacial isotope peak in response to sea ice retreat not ice-sheet collapse. Nature Commun. 7, 12293 (2016).

  52. 52.

    Collins, M. A., Brickle, P., Brown, J. & Belchier, M. The Patagonian toothfish: biology, ecology and fishery. Adv. Mar. Biol. 58, 227–300 (2010).

  53. 53.

    Xiong, X. et al. DNA barcoding reveals substitution of Sablefish (Anoplopoma fimbria) with Patagonian and Antarctic Toothfish (Dissostichus eleginoides and Dissostichus mawsoni) in online market in China: how mislabelling opens door to IUU fishing. Food Control 70, 380–391 (2016).

  54. 54.

    Watson, R. A. et al. Global marine yield halved as fishing intensity redoubles. Fish Fish. 14, 493–503 (2013).

  55. 55.

    Nicol, S. & Foster, J. in Biology and Ecology of Antarctic Krill (ed. Siegel, V.) 387–421 (Springer, Cham, 2016).

  56. 56.

    Kawaguchi, S. et al. Risk maps for Antarctic krill under projected Southern Ocean acidification. Nat. Clim. Change 3, 843–847 (2013).

  57. 57.

    Atkinson, A., Siegel, V., Pakhomov, E. A. & Rothery, P. Long-term decline in krill stock and increase in salps within the Southern Ocean. Nature 432, 100–103 (2004).

  58. 58.

    Hofman, R. J. Sealing, whaling and krill fishing in the Southern Ocean: past and possible future effects on catch regulations. Polar Rec. 53, 88–99 (2017).

  59. 59.

    Hill, S. et al. Is current management of the Antarctic krill fishery in the Atlantic sector of the Southern Ocean precautionary? CCAMLR Sci. 23, 31–51 (2016).

  60. 60.

    Brooks, C. M. et al. Science-based management in decline in the Southern Ocean. Science 354, 185–187 (2016). Here, an evidence-based argument is laid out for why the Commission for the Conservation of Antarctic Marine Living Resources (CCAMLR) faces a critical window of opportunity to remain a global leader in resource management.

  61. 61.

    Trivelpiece, W. Z. et al. Variability in krill biomass links harvesting and climate warming to penguin population changes in Antarctica. Proc. Natl Acad. Sci. USA 108, 7625–7628 (2011).

  62. 62.

    Trathan, P. N. et al. Pollution, habitat loss, fishing, and climate change as critical threats to penguins. Conserv. Biol. 29, 31–41 (2015).

  63. 63.

    Ainley, D. G. et al. How overfishing a large piscine mesopredator explains growth in Ross Sea populations of penguin populations: a framework to better understand impacts of a controversial fishery. Ecol. Modell. 349, 69–75 (2017).

  64. 64.

    Xavier, J. C. et al. Seasonal changes in the diet and feeding behaviour of a top predator indicate a flexible response to deteriorating oceanographic conditions. Mar. Biol. 160, 1597–1606 (2013).

  65. 65.

    Ainley, D. G., Ribic, C. A. & Fraser, W. R. Does prey preference affect habitat choice in Antarctic seabirds? Mar. Ecol. Prog. Ser. 90, 207–221 (1992).

  66. 66.

    Barrera-Oro, E. The role of fish in the Antarctic marine food web: differences between inshore and offshore waters in the southern Scotia Arc and west Antarctic Peninsula. Antarct. Sci. 14, 293–309 (2002).

  67. 67.

    Xavier, J. C., Wood, A. G., Rodhouse, P. G. & Croxall, J. P. Interannual variations in cephalopod consumption by albatrosses at South Georgia: implications for future commercial exploitation of cephalopods. Mar. Freshw. Res. 58, 1136–1143 (2007).

  68. 68.

    St. John, M. A. et al. A dark hole in our understanding of marine ecosystems and their services: perspectives from the mesopelagic community. Front. Mar. Sci. 3, 31 (2016).

  69. 69.

    Krüger, L. et al. Projected distributions of Southern Ocean albatrosses, petrels and fisheries as a consequence of climatic change. Ecography 41, 195–208 (2017).

  70. 70.

    Montes-Hugo, M. et al. Recent changes in phytoplankton communities associated with rapid regional climate change along the Western Antarctic Peninsula. Science 323, 1470–1473 (2009).

  71. 71.

    Deppeler, S. L. & Davidson, A. T. Southern Ocean phytoplankton in a changing climate. Front. Mar. Sci. 4, 40 (2017).

  72. 72.

    Schloss, I. R. et al. Response of phytoplankton dynamics to 19-year (1991–2009) climate trends in Potter Cove (Antarctica). J. Mar. Syst. 92, 53–66 (2012).

  73. 73.

    Fuentes, V. et al. Glacial melting: an overlooked threat to Antarctic krill. Sci. Rep. 6, 27234 (2016).

  74. 74.

    Lynch, H. J., Naveen, R., Trathan, P. N. & Fagan, W. F. Spatially integrated assessment reveals widespread changes in penguin populations on the Antarctic Peninsula. Ecology 93, 1367–1377 (2012).

  75. 75.

    Clucas, G. V. et al. A reversal of fortunes: climate change ‘winners’ and ‘losers’ in Antarctic Peninsula penguins. Sci. Rep. 4, 5024 (2014).

  76. 76.

    Cross, E. L., Peck, L. S. & Harper, E. M. Ocean acidification does not impact shell growth or repair of the Antarctic brachiopod Liothyrella uva (Broderip, 1833). J. Exp. Mar. Biol. Ecol. 462, 29–35 (2015).

  77. 77.

    Bednaršek, N. et al. Extensive dissolution of live pteropods in the Southern Ocean. Nat. Geosci. 5, 881–885 (2012).

  78. 78.

    Gutt, J. et al. The Southern Ocean ecosystem under multiple climate change stresses—an integrated circumpolar assessment. Glob. Change Biol. 21, 1434–1453 (2015). An integrated assessment of how environmental change drivers will act in concert to affect Southern Ocean benthic, pelagic and sea-ice species and ecosystems.

  79. 79.

    Lee, J. R. et al. Climate change drives expansion of Antarctic ice-free habitat. Nature 547, 49–54 (2017).

  80. 80.

    Cannone, N., Guglielmin, M., Convey, P., Worland, M. R. & Longo, S. E. F. Vascular plant changes in extreme environments: effects of multiple drivers. Clim. Change 134, 651–665 (2016).

  81. 81.

    Molina-Montenegro, M. A. et al. Occurrence of the non-native annual bluegrass on the Antarctic mainland and its negative effects on native plants. Conserv. Biol. 26, 717–723 (2012).

  82. 82.

    Chown, S. L. et al. Continent-wide risk assessment for the establishment of nonindigenous species in Antarctica. Proc. Natl Acad. Sci. USA 109, 4938–4943 (2012b).

  83. 83.

    Duffy, G. A. et al. Barriers to globally significant invaders are weakening across the Antarctic. Divers. Distrib. 23, 982–996 (2017).

  84. 84.

    Terauds, A. et al. Conservation biogeography of the Antarctic. Divers. Distrib. 18, 726–741 (2012).

  85. 85.

    Hughes, K. A., Pertierra, L. R., Molina-Montenegro, M. A. & Convey, P. Biological invasions in terrestrial Antarctica: what is the current status and can we respond? Biodivers. Conserv. 24, 1031–1055 (2015).

  86. 86.

    Hughes, K. A. & Pertierra, L. Evaluation of non-native species policy development and implementation within the Antarctic Treaty area. Biol. Conserv. 200, 149–159 (2016).

  87. 87.

    Tin, T., Liggett, D., Maher, P. D. & Lamers, M. (eds) Antarctic Futures. Human Engagement with the Antarctic Environment (Springer, Dordrecht, 2014).

  88. 88.

    Chown, S. L. & Duffy, G. A. The veiled ecological danger of rising sea levels. Nat. Ecol. Evol. 1, 1219–1221 (2017).

  89. 89.

    Gerland, P. et al. World population stabilization unlikely this century. Science 346, 234–237 (2014).

  90. 90.

    Ng, M. et al. Global, regional, and national prevalence of overweight and obesity in children and adults during 1980–2013: a systematic analysis for the Global Burden of Disease Study 2013. Lancet 384, 766–781 (2014).

  91. 91.

    Jacquet, J., Blood-Patterson, E., Brooks, C. & Ainley, D. G. ‘Rational use’ in Antarctic waters. Mar. Policy 63, 28–34 (2016).

  92. 92.

    Haward, M., Jabour, J. & Press, A. J. Antarctic treaty system ready for a challenge. Science 338, 603 (2012).

  93. 93.

    Soga, M. & Gaston, K. J. Extinction of experience: the loss of human–nature interactions. Front. Ecol. Environ. 14, 94–101 (2016).

  94. 94.

    Frieler, K., Mengel, M. & Levermann, A. Delaying future sea-level rise by storing water in Antarctica. Earth Syst. Dynam. 7, 203–210 (2016).

  95. 95.

    United Nations The Sustainable Development Goals Report 2017. https://unstats.un.org/sdgs/files/report/2017/TheSustainableDevelopmentGoalsReport2017.pdf (UN, 2017).

  96. 96.

    Paolo, F. S. et al. Response of Pacific-sector Antarctic ice shelves to the El Niño/Southern Oscillation. Nat. Geosci. 11, 121–126 (2018).

  97. 97.

    Fogt, R. L., Bromwich, D. H. & Hines, K. M. Understanding the SAM influence on the South Pacific ENSO teleconnection. Clim. Dyn. 36, 1555–1576 (2011).

  98. 98.

    Eyring, V. et al. Sensitivity of 21st century stratospheric ozone to greenhouse gas scenarios. Geophys. Res. Lett. 37, L16807 (2010).

  99. 99.

    Eyring, V. et al. Long-term ozone changes and associated climate impacts in CMIP5 simulation. J. Geophys. Res. Atmos. 118, 5029–5060 (2013).

  100. 100.

    Kuipers Munneke, P., Ligtenberg, S. R. M., van den Broeke, M. R., van Angelen, J. H. & Forster, R. R. Explaining the presence of perennial liquid water bodies in the firn of the Greenland Ice Sheet. Geophys. Res. Lett. 41, 476–483 (2014).

  101. 101.

    Seroussi, H. et al. Continued retreat of Thwaites Glacier, West Antarctica, controlled by bed topography and ocean circulation. Geophys. Res. Lett. 44, 6191–6199 (2017).

  102. 102.

    Antarctic Treaty Consultative Meeting (ATCM)Santiago Declaration on the Twenty Fifth Anniversary of the signing of the Protocol on Environmental Protection to the Antarctic Treaty. www.ats.aq/documents/ATCM39/ad/atcm39_ad003_e.pdf (ATCM, 2016).

  103. 103.

    Margules, C. R. & Pressey, R. L. Systematic conservation planning. Nature 405, 243–253 (2000).

  104. 104.

    Constable, A. J. et al. Change in Southern Ocean ecosystems I: How changes in physical habitats directly affect marine biota. Glob. Change Biol. 20, 3004–3025 (2014).

  105. 105.

    Rindi, L., Bello, M. D., Dai, L., Gore, J. & Benedetti-Cecchi, L. Direct observation of increasing recovery length before collapse of a marine benthic ecosystem. Nature Ecol. Evol. 1, 0153 (2017).

  106. 106.

    Boyd, P. W. in Geoengineering Responses to Climate Change: Selected Entries from the Encyclopedia of Sustainability Science and Technology (eds Lenton, T. & Vaughan, N.) 53–72 (Springer, New York, 2013).

  107. 107.

    Pardo, D., Jenouvrier, S., Weimerskirch, H. & Barbraud, C. Effect of extreme sea surface temperature events on the demography of an age-structured albatross population. Phil. Trans. R. Soc. Lond. B 372, 20160143 (2017).

  108. 108.

    Weimerskirch, H., Louzao, M., de Grissac, S. & Delord, K. Changes in wind pattern alter albatross distribution and life-history traits. Science 335, 211–214 (2012).

  109. 109.

    Andriuzzi, W. S., Adams, B. J., Barett, J. E., Virginia, R. A. & Wall, D. H. Observed trends of soil fauna in the Antarctic Dry Valleys: early signs of shifts predicted under climate change. Ecology 99, 312–321 (2017).

  110. 110.

    Chown, S. L. et al. The changing form of Antarctic biodiversity. Nature 522, 431–438 (2015).

  111. 111.

    Cavicchioli, R. Microbial ecology of Antarctic aquatic systems. Nat. Rev. Microbiol. 13, 691–706 (2015).

  112. 112.

    Saul, B. & Stephens, S. T. Antarctica in International Law (Hart Publishing, Oxford, 2015).

  113. 113.

    Aronson, R. B. et al. No barrier to emergence of bathyal king crabs on the Antarctic shelf. Proc. Natl Acad. Sci. USA 112, 12997–13002 (2015).

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Acknowledgements

This work arose from a panel of Muse Fellows organised as part of a ‘horizon scan’ by the Scientific Committee on Antarctic Research. We acknowledge the contribution of C. Kennicutt, who conceived and led the horizon scan. We also acknowledge the Tinker Foundation for their support of the Tinker–Muse Prize for Science and Policy in Antarctica. J. Matthews and L. Bell drafted the figures. S.R.R. was supported by the Australian Government Cooperative Research Centre (CRC) programme through the Antarctic Climate and Ecosystems CRC, the National Environmental Science Program, and the Centre for Southern Hemisphere Oceans Research (a partnership between CSIRO and the Qingdao National Laboratory for Marine Research). S.L.C. was supported by the Australian Antarctic Science Program. M.H.E. was supported by the Australian Research Council. V.M.D. acknowledges support from Institut Paul Emile Victor and Agence Nationale de la Recherche (ASUMA project number ANR-14-CE01-0001). T.R.N. was supported by a New Zealand Antarctic Research Institute grant and a Royal Society of New Zealand James Cook Fellowship. M.J.S. acknowledges support from the Grantham Foundation for the Protection of the Environment, the UK Natural Environment Research Council and the British Council. J.C.X. was supported by the Foundation for Science and Technology Investigator programme (IF/00616/2013) and the MARE strategic programme (MARE-UID/MAR/04292/2013). R.M.D. was supported by the NSF under award ICER 1664013, and NASA’s Sea Level Rise Program.

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Nature thanks D. Ainley, K. Dodds and J. Lenaerts for their contribution to the peer review of this work.

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Affiliations

  1. CSIRO Oceans & Atmosphere, Hobart, Tasmania, Australia

    • S. R. Rintoul
  2. Antarctic Climate and Ecosystems Cooperative Research Centre, Hobart, Tasmania, Australia

    • S. R. Rintoul
  3. Centre for Southern Hemisphere Oceans Research, Hobart, Tasmania, Australia

    • S. R. Rintoul
  4. School of Biological Sciences, Monash University, Victoria, Australia

    • S. L. Chown
  5. University of Massachusetts, Amherst, MA, USA

    • R. M. DeConto
  6. ARC Centre of Excellence for Climate System Science, University of New South Wales, Sydney, New South Wales, Australia

    • M. H. England
  7. Scripps Institution of Oceanography, La Jolla, CA, USA

    • H. A. Fricker
  8. LSCE (IPSL, CEA-CNRS-UVSQ, Université Paris Saclay), Paris, France

    • V. Masson-Delmotte
  9. Victoria University of Wellington, Wellington, New Zealand

    • T. R. Naish
  10. Grantham Institute and Department of Earth Science and Engineering, Imperial College London, London, UK

    • M. J. Siegert
  11. Marine and Environmental Science Centre MARE, Department of Life Sciences, University of Coimbra, Coimbra, Portugal

    • J. C. Xavier
  12. British Antarctic Survey, Natural Environment Research Council, Cambridge, UK

    • J. C. Xavier

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Contributions

S.R.R. conceived the retrospective narrative approach as a vehicle to highlight the dependence of the future of Antarctica and the Southern Ocean on choices made today. S.R.R. and S.L.C. wrote the initial draft. S.R.R. coordinated the drafting of the paper and developed the concept for the figures. All authors contributed to the discussion of ideas and the writing of the paper.

Competing interests

S.L.C. is President of the Scientific Committee on Antarctic Research.

Corresponding author

Correspondence to S. R. Rintoul.

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