There is widespread concern that anthropogenic global warming will trigger Arctic climate tipping points. The Arctic has a long history of natural, abrupt climate changes, which together with current observations and model projections, can help us to identify which parts of the Arctic climate system might pass future tipping points. Here the climate tipping points are defined, noting that not all of them involve bifurcations leading to irreversible change. Past abrupt climate changes in the Arctic are briefly reviewed. Then, the current behaviour of a range of Arctic systems is summarised. Looking ahead, a range of potential tipping phenomena are described. This leads to a revised and expanded list of potential Arctic climate tipping elements, whose likelihood is assessed, in terms of how much warming will be required to tip them. Finally, the available responses are considered, especially the prospects for avoiding Arctic climate tipping points.
KeywordsArctic Tipping points Sea-ice Greenland ice sheet Atlantic thermohaline circulation Boreal forest
- Allison, I., N.L. Bindoff, R.A. Bindschadler, P.M. Cox, N. de Noblet, M.H. England, J.E. Francis, N. Gruber, et al. 2009. In The Copenhagen Diagnosis, 2009: Updating the world on the Latest Climate Science, 60 pp. The University of New South Wales Climate Change Research Centre (CCRC), Sydney, Australia.Google Scholar
- Carmack, C., F. McLaughlin, G. Whiteman, and T. Homer Dixon. 2012. Detecting and coping with potentially disruptive shocks and flips in complex adaptive Arctic Marine systems: a resilience approach to place and people. Ambio 41(1). doi: 10.1007/s13280-011-0225-6.
- Chapin, F.S., T.V. Callaghan, Y. Bergeron, M. Fukuda, J.F. Johnstone, G. Juday, and S.A. Zimov. 2004. Global change and the boreal forest: Thresholds, shifting states or gradual change? Ambio 33: 361–365.Google Scholar
- Duarte, C.M., S. Agustí., P. Wassmann, J.M. Arrieta, M. Alcaraz, A. Coello, N. Marbà, I.E. Hendriks, J. Holding, I. García-Zarandona, E. Kritzberg, and D. Vaqué. 2012. Tipping elements in the arctic marine ecosystem. In The Arctic in the Earth System perspective: the role of tipping points, ed. Wassmann, P., Lenton, T.M. Ambio. doi: 10.1007/s13280-011-0224-7.
- Egede-Nissen, B., and H.D. Venema. 2009. Desperate times, desperate measures: Advancing the geoengineering debate at the Arctic Council. Portagee: International Institute for Sustainable Development (IISD).Google Scholar
- Gladwell, M. 2000. The tipping point: How little things can make a big difference. New York: Little Brown.Google Scholar
- IPCC. 2007. Climate Change 2007: The Physical Science Basis. In Contribution of Working Group I to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change, ed. S. Solomon, S., D. Qin, M. Manning, Z. Chen, M. Marquis, K.B. Avery M. Tignor, and H.L. Miller. New York: Cambridge University Press.Google Scholar
- Joos, F., I.C. Prentice, S. Sitch, R. Meyer, G. Hooss, G.-K. Plattner, S. Gerber, and K. Hasselmann. 2001. Global warming feedbacks on terrestrial carbon uptake under the Intergovernmental Panel on Climate Change (IPCC) emissions scenarios. Global Biogeochemical Cycles 15: 891–907.CrossRefGoogle Scholar
- Khvorostyanov, D. V., P. Ciais, G. Krinner, and S. A. Zimov 2008a. Vulnerability of east Siberia’s frozen carbon stores to future warming. Geophysical Research Letters 35: L10703. Add Doi.Google Scholar
- Khvorostyanov, D.V., G. Krinner, P. Ciais, M. Heimann, and S.A. Zimov. 2008b. Vulnerability of permafrost carbon to global warming. Part I: model description and the role of heat generated by organic matter decomposition. Tellus B 60B: 250–264.Google Scholar
- Kurz, W.A., G. Stinson, G.J. Rampley, C.C. Dymond, and E.T. Neilson. 2008b. Risk of natural disturbances makes future contribution of Canada’s forests to the global carbon cycle highly uncertain. Proceedings of the National Academy of Sciences of the United States of America 105: 1551–1555.CrossRefGoogle Scholar
- Levermann, A., J. Bamber, S. Drijfhout, A. Ganopolski, W. Haeberli, N. R. P. Harris, M. Huss, K. Krüger, et al. 2011. Potential climatic transitions with profound impact on Europe: Review of the current state of six ‘tipping elements of the climate system’. Climatic Change: 10.1007/s10584-011-0126-5.
- Peng, T. H. 1995. Future climate surprises. In Future Climates of the World: A Modelling Perspective, ed. A. Henderson-Sellers, pp 517–535: Elsevier.Google Scholar
- Petoukhov, V., and V.A. Semenov. 2010. A link between reduced Barents-Kara sea ice and cold winter extremes over northern continents. Journal of Geophysical. Research. 115: D21111.Google Scholar
- Proshutinsky, A., R.H. Bourke, and F.A. McLaughlin 2002. The role of the Beaufort Gyre in Arctic climate variability: Seasonal to decadal climate scales. Geophysical Research Letters 29. doi 10.1029/2002GL015847.
- Proshutinsky, A., R. Krishfield, M.-L. Timmermans, J. Toole, E. Carmack, F. McLaughlin, W. J. Williams, S. Zimmermann, et al. 2009. Beaufort Gyre freshwater reservoir: State and variability from observations. Journal of Geophysical Research. 114: C00A10.Google Scholar
- Schellnhuber, H.J., W. Cramer, N. Nakicenovic, T. Wigley, and G. Yohe. 2006. Avoiding dangerous climate change. Cambridge: Cambridge University Press.Google Scholar
- Screen, J., and I. Simmonds. 2011. Declining summer snowfall in the Arctic: Causes, impacts and feedbacks. Climate Dynamics: 1–14. doi: 10.1007/s00382-011-1105-2.
- Shakhova, N., I. Semiletov, A. Salyuk, and D. Kosmach. 2008. Anomalies of methane in the atmosphere over the East Siberian shelf: Is there any sign of methane leakage from shallow shelf hydrates? Geophysical Research Abstracts 10, EGU2008-A-01526. Google Scholar
- Sitch, S., C. Huntingford, N. Gedney, P.E. Levy, M. Lomas, S.L. Piao, R. Betts, P. Ciais, et al. 2008. Evaluation of the terrestrial carbon cycle, future plant geography and climate-carbon cycle feedbacks using five Dynamic Global Vegetation Models (DGVMs). Global Change Biology 14: 2015–2039.CrossRefGoogle Scholar
- Smith, J.B., S.H. Schneider, M. Oppenheimer, G.W. Yohe, W. Hare, M.D. Mastrandrea, A. Patwardhan, I. Burton, et al. 2009. Assessing dangerous climate change through an update of the Intergovernmental Panel on Climate Change (IPCC) “reasons for concern”. Proceedings of the National Academy of Sciences of the United States of America 106: 4133–4137.CrossRefGoogle Scholar
- Wadhams, P. 2012. Ice cover, ice thickness and tipping points. Ambio 41(1). doi: 10.1007/s13280-011-0222-9.