Differential climate impacts for policy-relevant limits to global warming: the case of 1.5 °C and 2 °C
Tóm tắt
Abstract. Robust appraisals of climate impacts at different levels of global-mean temperature increase are vital to guide assessments of dangerous anthropogenic interference with the climate system. The 2015 Paris Agreement includes a two-headed temperature goal: "holding the increase in the global average temperature to well below 2 °C above pre-industrial levels and pursuing efforts to limit the temperature increase to 1.5 °C". Despite the prominence of these two temperature limits, a comprehensive overview of the differences in climate impacts at these levels is still missing. Here we provide an assessment of key impacts of climate change at warming levels of 1.5 °C and 2 °C, including extreme weather events, water availability, agricultural yields, sea-level rise and risk of coral reef loss. Our results reveal substantial differences in impacts between a 1.5 °C and 2 °C warming that are highly relevant for the assessment of dangerous anthropogenic interference with the climate system. For heat-related extremes, the additional 0.5 °C increase in global-mean temperature marks the difference between events at the upper limit of present-day natural variability and a new climate regime, particularly in tropical regions. Similarly, this warming difference is likely to be decisive for the future of tropical coral reefs. In a scenario with an end-of-century warming of 2 °C, virtually all tropical coral reefs are projected to be at risk of severe degradation due to temperature-induced bleaching from 2050 onwards. This fraction is reduced to about 90 % in 2050 and projected to decline to 70 % by 2100 for a 1.5 °C scenario. Analyses of precipitation-related impacts reveal distinct regional differences and hot-spots of change emerge. Regional reduction in median water availability for the Mediterranean is found to nearly double from 9 % to 17 % between 1.5 °C and 2 °C, and the projected lengthening of regional dry spells increases from 7 to 11 %. Projections for agricultural yields differ between crop types as well as world regions. While some (in particular high-latitude) regions may benefit, tropical regions like West Africa, South-East Asia, as well as Central and northern South America are projected to face substantial local yield reductions, particularly for wheat and maize. Best estimate sea-level rise projections based on two illustrative scenarios indicate a 50 cm rise by 2100 relative to year 2000-levels for a 2 °C scenario, and about 10 cm lower levels for a 1.5 °C scenario. In a 1.5 °C scenario, the rate of sea-level rise in 2100 would be reduced by about 30 % compared to a 2 °C scenario. Our findings highlight the importance of regional differentiation to assess both future climate risks and different vulnerabilities to incremental increases in global-mean temperature. The article provides a consistent and comprehensive assessment of existing projections and a good basis for future work on refining our understanding of the difference between impacts at 1.5 °C and 2 °C warming.
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Asseng, S., Ewert, F., Martre, P., Rötter, R., Lobell, D., Cammarano, D., Kimball, B. A., Ottman, M., Wall, G., White, J., Reynolds, M., Alderman, P., Prasad, P., Aggarwal, P., Anothai, J., Basso, B., Biernath, C., Challinor, A., De Sanctis, G., Doltra, J., Fereres, E., Garcia-Vila, M., Gayler, S., Hoogenboom, G., Hunt, L., Izaurralde, R., Jabloun, M., Jones, C., Kersebaum, K., Koehler, A.-K., Müller, C., Naresh Kumar, S., Nendel, C., O’Leary, G., Olesen, J., Palosuo, T., Priesack, E., Eyshi Rezaei, E., Ruane, A., Semenov, M., Shcherbak, I., Stöckle, C., Stratonovitch, P., Streck, T., Supit, I., Tao, F., Thorburn, P., Waha, K., Wang, E., Wallach, D., Wolf, J., Zhao, Z., and Zhu, Y.: Rising temperatures reduce global wheat production, Nat. Clim. Change, 5, 143–147, https://doi.org/10.1038/nclimate2470, 2014.
Ault, T. R., Cole, J. E., Overpeck, J. T., Pederson, G. T., and Meko, D. M.: Assessing the risk of persistent drought using climate model simulations and paleoclimate data, J. Climate, 27, 7529–7549, https://doi.org/10.1175/JCLI-D-12-00282.1, 2014.
Baker, A. C., Glynn, P. W., and Riegl, B.: Climate change and coral reef bleaching: An ecological assessment of long-term impacts, recovery trends and future outlook, Estuar. Coast. Shelf Sci., 435–471, 2008. https://doi.org/10.1007/s00382-012-1408-y, 2012.
Bindschadler, R. A., Nowicki, S., Abe-OUCHI, A., Aschwanden, A., Choi, H., Fastook, J., Granzow, G., Greve, R., Gutowski, G., Herzfeld, U., Jackson, C., Johnson, J., Khroulev, C., Levermann, A., Lipscomb, W. H., Martin, M. A., Morlighem, M., Parizek, B. R., Pollard, D., Price, S. F., Ren, D., Saito, F., Sato, T., Seddik, H., Seroussi, H., Takahashi, K., Walker, R., and Wang, W. L.: Ice-sheet model sensitivities to environmental forcing and their use in projecting future sea level (the SeaRISE project), J. Glaciol., 59, 195–224, https://doi.org/10.3189/2013JoG12J125, 2013.
Bodirsky, B. L. and Müller, C.: Robust relationship between yields and nitrogen inputs indicates three ways to reduce nitrogen pollution, Environ. Res. Lett., 9, 111005, https://doi.org/10.1088/1748-9326/9/11/111005, 2014.
Bodirsky, B. L., Popp, A., Lotze-Campen, H., Dietrich, J. P., Rolinski, S., Weindl, I., Schmitz, C., Müller, C., Bonsch, M., Humpenöder, F., Biewald, A., and Stevanovic, M.: Reactive nitrogen requirements to feed the world in 2050 and potential to mitigate nitrogen pollution, Nat. Commun., 5, 3858, https://doi.org/10.1038/ncomms4858, 2014.
Boers, N., Bookhagen, B., Barbosa, H., Marwan, N., and Kurths, J.: Prediction of extreme floods in the Central Andes by means of Complex Networks, Nat. Commun., 16, 7173, https://doi.org/10.1038/ncomms6199, 2014.
Caldeira, K.: Ocean model predictions of chemistry changes from carbon dioxide emissions to the atmosphere and ocean, J. Geophys. Res., 110, 1–12, https://doi.org/10.1029/2004JC002671, 2005.
Chadwick, R. and Good, P.: Understanding nonlinear tropical precipitation responses to CO2 forcing, Geophys. Res. Lett., 40, 4911–4915, https://doi.org/10.1002/grl.50932, 2013.
Chen, P.-Y., Chen, C.-C., Chu, L., and Mccarl, B.: Evaluating the economic damage of climate change on global coral reefs, Global Environ. Change, 30, 12–20, https://doi.org/10.1016/j.gloenvcha.2014.10.011, 2015.
Church, J. A., Clark, P. U., Cazenave, A., Gregory, J. M., Jevrejeva, S., Levermann, A., Merrifield, M. A., Milne, G. A., Nerem, R. S., Nunn, P. D., Payne, A. J., Pfeffer, W. T., Stammer, D., and Unnikrishnan, A. S.: Sea Level Change, in: Climate Change 2013: The Physical Science Basis, Contribution of Working Group I to the Fifth Assessment Report of the Intergovernmental Panel on Climate, edited by: Stocker, T. F., Qin, D., Plattner, G.-K., Tignor, M., Allen, S. K., Boschung, J., Nauels, A., Xia, Y., Bex, V., and Midgley, P. M., Cambridge University Press, Cambridge, UK and New York, NY, USA, 2013.
Cinner, J. E., Pratchett, M. S., Graham, N. A. J., Messmer, V., Fuentes, M. M. P. B., Ainsworth, T., Ban, N., Bay, L. K., Blythe, J., Dissard, D., Dunn, S., Evans, L., Fabinyi, M., Fidelman, P., Figueiredo, J., Frisch, A. J., Fulton, C. J., Hicks, C. C., Lukoschek, V., Mallela, J., Moya, A., Penin, L., Rummer, J. L., Walker, S., and Williamson, D. H.: A framework for understanding climate change impacts on coral reef social–ecological systems, Reg. Environ. Change, 16, 1133–1146 https://doi.org/10.1007/s10113-015-0832-z, 2016.
Clark, P. U., Shakun, J. D., Marcott, S. A., Mix, A. C., Eby, M., Kulp, S., Levermann, A., Milne, G. A., Pfister, P. L., Santer, B. D., Schrag, D. P., Solomon, S., Stocker, T. F., Strauss, B. H., Weaver, A. J., Winkelmann, R., Archer, D., Bard, E., Goldner, A., Lambeck, K., Pierrehumbert, R. T., and Plattner, G.-K.: Consequences of twenty-first-century policy for multi-millennial climate and sea-level change, Nat. Clim. Change, 6, 360–369, https://doi.org/10.1038/nclimate2923, 2016.
Coumou, D. and Robinson, A.: Historic and future increase in the global land area affected by monthly heat extremes, Environ. Res. Lett., 8, 034018, https://doi.org/10.1088/1748-9326/8/3/034018, 2013.
Dai, A.: Increasing drought under global warming in observations and models, Nat. Clim. Change, 3, 52–58, https://doi.org/10.1038/nclimate1633, 2012.
Deryng, D., Conway, D., Ramankutty, N., Price, J., and Warren, R.: Global crop yield response to extreme heat stress under multiple climate change futures, Environ. Res. Lett., 9, 034011, https://doi.org/10.1088/1748-9326/9/3/034011, 2014.
Diffenbaugh, N. S. and Scherer, M.: Observational and model evidence of global emergence of permanent, unprecedented heat in the 20th and 21st centuries, Climatic Change, 107, 615–624, https://doi.org/10.1007/s10584-011-0112-y, 2011.
Donner, S. D.: Coping with commitment: projected thermal stress on coral reefs under different future scenarios, PloS One, 4, e5712, https://doi.org/10.1371/journal.pone.0005712, 2009.
Donner, S. D., Skirving, W. J., Little, C. M., Oppenheimer, M., and Hoegh-Gulberg, O.: Global assessment of coral bleaching and required rates of adaptation under climate change, Global Change Biol., 11, 2251–2265, https://doi.org/10.1111/j.1365-2486.2005.01073.x, 2005.
Donner, S. D., Knutson, T. R., and Oppenheimer, M.: Model-based assessment of the role of human-induced climate change in the 2005 Caribbean coral bleaching event, P. Natl. Acad. Sci., 104, 5483–5488, https://doi.org/10.1073/pnas.0610122104, 2007.
Dutton, A., Carlson, A. E., Long, A. J., Milne, G. A., Clark, P. U., DeConto, R., Horton, B. P., Rahmstorf, S., and Raymo, M. E.: Sea-level rise due to polar ice-sheet mass loss during past warm periods, Science, 349, 6244, https://doi.org/10.1126/science.aaa4019, 2015.
Eamus, D.: The interaction of rising CO2 and temperatures with water use efficiency, Plant Cell Environ., 14, 843–852, https://doi.org/10.1111/j.1365-3040.1991.tb01447.x, 1991.
Favier, L., Durand, G., Cornford, S. L., Gudmundsson, G. H., Gagliardini, O., Gillet-Chaulet, F., Zwinger, T., Payne, A. J., and Le Brocq, A. M.: Retreat of Pine Island Glacier controlled by marine ice-sheet instability, Nat. Clim. Change, 4, 117–121, https://doi.org/10.1038/nclimate2094, 2014.
Feldmann, J. and Levermann, A.: Collapse of the West Antarctic Ice Sheet after local destabilization of the Amundsen Basin, P. Natl. Acad. Sci., 112, 14191–14196, https://doi.org/10.1073/pnas.1512482112, 2015.
Fettweis, X., Franco, B., Tedesco, M., van Angelen, J. H., Lenaerts, J. T. M., van den Broeke, M. R., and Gallée, H.: Estimating the Greenland ice sheet surface mass balance contribution to future sea level rise using the regional atmospheric climate model MAR, The Cryosphere, 7, 469–489, https://doi.org/10.5194/tc-7-469-2013, 2013.
Fischer, E.M. and Knutti, R.: Detection of spatially aggregated changes in temperature and precipitation extremes, Geophys. Res. Lett., 41, https://doi.org/10.1002/2013GL058499, 2014.
Fischer, E. M., Beyerle, U., and Knutti, R.: Robust spatially aggregated projections of climate extremes, Nat. Clim. Change, 3, 1033–1038, https://doi.org/10.1038/nclimate2051, 2013.
Flato, G., Marotzke, J., Abiodun, B., Braconnot, P., Chou, S. C., Collins, W., Cox, P., Driouech, F., Emori, S., Eyring, V., Forest, C., Gleckler, P., Guilyardi, E., Jakob, C., Kattsov, V., Reason, C., and Rummukainen, M.: Evaluation of Climate Models, book section 9, Cambridge University Press, Cambridge, UK and New York, NY, USA, 741–866, https://doi.org/10.1017/CBO9781107415324.020, 2013.
Frieler, K., Meinshausen, M., Golly, A., Mengel, M., Lebek, K., Donner, S. D., and Hoegh-Guldberg, O.: Limiting global warming to 2C is unlikely to save most coral reefs, Nat. Clim. Change, 3, 165–170, https://doi.org/10.1038/nclimate1674, 2012.
Frieler, K., Levermann, A., Elliott, J., Heinke, J., Arneth, A., Bierkens, M. F. P., Ciais, P., Clark, D. B., Deryng, D., Döll, P., Falloon, P., Fekete, B., Folberth, C., Friend, A. D., Gellhorn, C., Gosling, S. N., Haddeland, I., Khabarov, N., Lomas, M., Masaki, Y., Nishina, K., Neumann, K., Oki, T., Pavlick, R., Ruane, A. C., Schmid, E., Schmitz, C., Stacke, T., Stehfest, E., Tang, Q., Wisser, D., Huber, V., Piontek, F., Warszawski, L., Schewe, J., Lotze-Campen, H., and Schellnhuber, H. J.: A framework for the cross-sectoral integration of multi-model impact projections: land use decisions under climate impacts uncertainties, Earth Syst. Dynam., 6, 447–460, https://doi.org/10.5194/esd-6-447-2015, 2015.
Gattuso, J.-P., Magnan, A., Bille, R., Cheung, W. W. L., Howes, E. L., Joos, F., Allemand, D., Bopp, L., Cooley, S. R., Eakin, C. M., Hoegh-Guldberg, O., Kelly, R. P., Portner, H.-O., Rogers, A. D., Baxter, J. M., Laffoley, D., Osborn, D., Rankovic, A., Rochette, J., Sumaila, U. R., and Treyer, S.: Contrasting futures for ocean and society from different anthropogenic CO2 emissions scenarios, Science, 349, aac4722, https://doi.org/10.1126/science.aac4722, 2015.
Gourdji, S. M., Sibley, A. M., and Lobell, D. B.: Global crop exposure to critical high temperatures in the reproductive period: historical trends and future projections, Environ. Res. Lett., 8, 024041, https://doi.org/10.1088/1748-9326/8/2/024041, 2013.
Graham, N. A. J., Jennings, S., Macneil, M. A., Mouillot, D., and Wilson, S. K.: Predicting climate-driven regime shifts versus rebound potential in coral reefs, Nature, 518, 94–97, https://doi.org/10.1038/nature14140, 2015.
Gregory, J. M. and Huybrechts, P.: Ice-sheet contributions to future sea-level change, Philos. T. Roy. Soc. A, 364, 1709–1732, https://doi.org/10.1098/rsta.2006.1796, 2006.
Hansen, J., Sato, M., and Ruedy, R.: PNAS Plus: Perception of climate change, P. Natl. Acad. Sci., 109, E2415–E2423, https://doi.org/10.1073/pnas.1205276109, 2012.
Hawkins, E., Joshi, M., and Frame, D.: Wetter then drier in some tropical areas, Nat. Clim. Change, 4, 646–647, https://doi.org/10.1038/nclimate2299, 2014.
Held, I. M. and Soden, B. J.: Robust Responses of the Hydrological Cycle to Global Warming, J. Climate, 19, 5686–5699, 2006.
Hellmer, H. H., Kauker, F., Timmermann, R., Determann, J., and Rae, J.: Twenty-first-century warming of a large Antarctic ice-shelf cavity by a redirected coastal current, Nature, 485, 225–228, https://doi.org/10.1038/nature11064, 2012.
Hempel, S., Frieler, K., Warszawski, L., Schewe, J., and Piontek, F.: A trend-preserving bias correction – the ISI-MIP approach, Earth Syst. Dynam., 4, 219–236, https://doi.org/10.5194/esd-4-219-2013, 2013.
Herger, N., Sanderson, B. M., and Knutti, R.: Improved pattern scaling approaches for the use in climate impact studies, Geophys. Res. Lett., 42, 3486–3494, https://doi.org/10.1002/2015GL063569, 2015.
Hinkel, J., Lincke, D., Vafeidis, A. T., Perrette, M., Nicholls, R. J., Tol, R. S. J., Marzeion, B., Fettweis, X., Ionescu, C., and Levermann, A.: Coastal flood damage and adaptation costs under 21st century sea-level rise, P. Natl. Acad. Sci., 111, 3292–3297, https://doi.org/10.1073/pnas.1222469111, 2014.
Hirabayashi, Y., Mahendran, R., Koirala, S., Konoshima, L., Yamazaki, D., Watanabe, S., Kim, H., and Kanae, S.: Global flood risk under climate change, Nat. Clim. Change, 3, 1–6, https://doi.org/10.1038/nclimate1911, 2013.
IPCC: Managing the Risks of Extreme Events and Disasters to Advance Climate Change Adaptation, in: A Special Report of Working Groups I and II of the Intergovernmental Panel on Climate Change, edited by: Field, C. B., Barros, V., Stocker, T. F., Qin, D., Dokken, D. J., Ebi, K. L., Mastrandrea, M. D., Mach, K. J., Plattner, G.-K., Allen, S. K., Tignor, M., and Midgley, P. M., Cambridge University Press, Cambridge, UK, and New York, NY, USA, 582 pp., 2012.
IPCC: Summary for Policymakers, in: Climate Change 2013: The Physical Science Basis, Contribution of Working Group I to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change, edited by: Stocker, T., Qin, D., Plattner, G.-K., Tignor, M., Allen, S., Boschung, J., Nauels, A., Xia, Y., Bex, V., and Midgley, P., IPCC AR WGI, Cambridge University Press, Cambridge, UK and New York, NY, USA, 1–100, 2013.
IPCC: Climate Change 2014: Synthesis Report, in: Contribution of Working Groups I, II and III to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change, IPCC Geneva, Switzerland, 151 pp., 2014a.
IPCC: Summary for Policy Makers, in: Climate Change 2014: Impacts, Adaptation and Vulnerability – Contributions of the Working Group II to the Fifth Assessment Report, edited by: Field, C. B., Barros, V. R., Dokken, D., Mach, K. J., Mastrandrea, M. D., Bilir, T. E., Chatterjee, M., Ebi, K. L., Estrada, Y., Genova, R., Girma, B., Kissel, E., Levy, A., MacCracken, S., Mastrandrea, P. R., and White, L., Cambridge University Press, Cambridge, UK and New York, NY, USA, 1–32, https://doi.org/10.1016/j.renene.2009.11.012, 2014b.
James, R. and Washington, R.: Changes in African temperature and precipitation associated with degrees of global warming, Climatic Change, 117, 859–872, https://doi.org/10.1007/s10584-012-0581-7, 2013.
Jiménez Cisneros, B. E., Oki, T., Arnell, N. W., Benito, G., Cogley, J G., Döll, P., Jiang, T., and Mwakalila, S. S.: Freshwater resources, in: Climate Change 2014: Impacts, Adaptation, and Vulnerability, Part A: Global and Sectoral Aspects, Contribution of Working Group II to the Fifth Assessment Report of the Intergovernmental Panel of Climate Change, edited by: Field, C. B., Barros, V. R., Dokken, D. J., Mach, K. J., Mastrandrea, M. D., Bilir, T. E., Chatterjee, M., Ebi, K. L., Estrada, Y. O., Genova, R. C., Girma, B., Kissel, E. S., Levy, A. N., MacCracken, S., Mastrandrea, P. R., and White, L. L., Cambridge University Press, Cambridge, UK and New York, NY, USA, 229–269, 2014.
Joughin, I., Smith, B. E., and Medley, B.: Marine Ice Sheet Collapse Potentially Underway for the Thwaites Glacier Basin, West Antarctica, Science, 344, 735–388, https://doi.org/10.1126/science.1249055, 2014.
Kelley, C. P., Mohtadi, S., Cane, M. A., Seager, R., and Kushnir, Y.: Climate change in the Fertile Crescent and implications of the recent Syrian drought, P. Natl. Acad. Sci. USA, 112, 3241–3246 https://doi.org/10.1073/pnas.1421533112, 2015.
Kendon, E. J., Rowell, D. P., Jones, R. G., and Buonomo, E.: Robustness of Future Changes in Local Precipitation Extremes, J. Climate, 21, 4280–4297, https://doi.org/10.1175/2008JCLI2082.1, 2008.
Kharin, V. V., Zwiers, F. W., Zhang, X., and Wehner, M.: Changes in temperature and precipitation extremes in the CMIP5 ensemble, Climatic Change, 119, 345–357, https://doi.org/10.1007/s10584-013-0705-8, 2013.
Kiem, A. and Verdon-Kidd, D.: Towards understanding hydroclimatic change in Victoria, Australia – preliminary insights into the "Big Dry", Hydrol. Earth Syst. Sci., 14, 433–445, https://doi.org/10.5194/hess-14-433-2010, 2010.
King, A. D., Donat, M. G., Fischer, E. M., Hawkins, E., Alexander, L. V., Karoly, D. J., Dittus, A. J., Lewis, S. C., and Perkins, S. E.: The timing of anthropogenic emergence in simulated climate extremes, Environ. Res. Lett., 10, 094015, https://doi.org/10.1088/1748-9326/10/9/094015, 2015.
Knutson, T. R., McBride, J. L., Chan, J., Emanuel, K., Holland, G., Landsea, C., Held, I., Kossin, J. P., Srivastava, A. K., and Sugi, M.: Tropical cyclones and climate change, Nat. Geosci., 3, 157–163, https://doi.org/10.1038/ngeo779, 2010.
Knutti, R. and Sedláček, J.: Robustness and uncertainties in the new CMIP5 climate model projections, Nat. Clim. Change, 3, 369–373, https://doi.org/10.1038/nclimate1716, 2012.
Knutti, R., Rogelj, J., Sedláček, J., and Fischer, E. M.: A scientific critique of the two-degree climate change target, Nat. Geosci., 9, 13–18, https://doi.org/10.1038/ngeo2595, 2015.
Leakey, A. D. B., Uribelarrea, M., Ainsworth, E. A., Naidu, S. L., Rogers, A., Ort, D. R., and Long, S. P.: Photosynthesis, productivity, and yield of maize are not affected by open-air elevation of CO2 concentration in the absence of drought, Plant Physiol., 140, 779–790, https://doi.org/10.1104/pp.105.073957, 2006.
Lesk, C., Rowhani, P., and Ramankutty, N.: Influence of extreme weather disasters on global crop production, Nature, 529, 84–87, https://doi.org/10.1038/nature16467, 2016.
Levermann, A., Clark, P. U., Marzeion, B., Milne, G. A., Pollard, D., Radic, V., and Robinson, A.: The multimillennial sea-level commitment of global warming, P. Natl. Acad. Sci. USA, 110, 13745–13750, https://doi.org/10.1073/pnas.1219414110, 2013.
Levermann, A., Winkelmann, R., Nowicki, S., Fastook, J. L., Frieler, K., Greve, R., Hellmer, H. H., Martin, M. A., Meinshausen, M., Mengel, M., Payne, A. J., Pollard, D., Sato, T., Timmermann, R., Wang, W. L., and Bindschadler, R. A.: Projecting Antarctic ice discharge using response functions from SeaRISE ice-sheet models, Earth Syst. Dynam., 5, 271–293, https://doi.org/10.5194/esd-5-271-2014, 2014.
Lobell, D. B. and Tebaldi, C.: Getting caught with our plants down: the risks of a global crop yield slowdown from climate trends in the next two decades, Environ. Res. Lett., 9, 074003, https://doi.org/10.1088/1748-9326/9/7/074003, 2014.
Lobell, D. B., Sibley, A., and Ivan Ortiz-Monasterio, J.: Extreme heat effects on wheat senescence in India, Nat. Clim. Change, 2, 186–189, https://doi.org/10.1038/nclimate1356, 2012.
Lopez, A., Suckling, E. B., and Smith, L. A.: Robustness of pattern scaled climate change scenarios for adaptation decision support, Climatic Change, 122, 555–566, https://doi.org/10.1007/s10584-013-1022-y, 2013.
Marotzke, J. and Forster, P. M.: Forcing, feedback and internal variability in global temperature trends, Nature, 517, 565–570, https://doi.org/10.1038/nature14117, 2014.
Maynard, J., van Hooidonk, R., Eakin, C. M., Puotinen, M., Garren, M., Williams, G., Heron, S. F., Lamb, J., Weil, E., Willis, B., and Harvell, C. D.: Projections of climate conditions that increase coral disease susceptibility and pathogen abundance and virulence, Nat. Clim. Change, 5, 688–694, https://doi.org/10.1038/nclimate2625, 2015.
McGrath, J. M. and Lobell, D. B.: Regional disparities in the CO2 fertilization effect and implications for crop yields, Environ. Res. Lett., 8, 014054, https://doi.org/10.1088/1748-9326/8/1/014054, 2013.
McSweeney, C. F. and Jones, R. G.: How representative is the spread of climate projections from the 5 {CMIP5} {GCMs} used in ISI-MIP?, Climate Services, 1, 24–29, https://doi.org/10.1016/j.cliser.2016.02.001, 2016.
Meehl, G., Stocker, T., Collins, W., Friedlingstein, P., Gaye, A., Gregory, J., Kitoh, A., Knutti, R., Murphy, J., Noda, A., Raper, S., Watterson, I., Weaver, A., and Zhao, Z.-C.: Global climate projections, in: Climate Change 2007: The Physical Science Basis, Contribution of Working Group I to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change, chap. 10, edited by: Solomon, S., Qin, D., Manning, M., Chen, Z., Marquis, M., Averyt, K., Tignor, M., and Miller, H., Cambridge University Press, Cambridge, UK and New York, NY, USA, 747–845, 2007.
Meinshausen, M., Meinshausen, N., Hare, W., Raper, S. C. B., Frieler, K., Knutti, R., Frame, D. J., and Allen, M. R.: Greenhouse-gas emission targets for limiting global warming to 2 °C, Nature, 458, 1158–1162, https://doi.org/10.1038/nature08017, 2009.
Meinshausen, M., Raper, S. C. B., and Wigley, T. M. L.: Emulating coupled atmosphere-ocean and carbon cycle models with a simpler model, MAGICC6 – Part 1: Model description and calibration, Atmos. Chem. Phys., 11, 1417–1456, https://doi.org/10.5194/acp-11-1417-2011, 2011.
Meissner, K. J., Lippmann, T., and Sen Gupta, A.: Large-scale stress factors affecting coral reefs: open ocean sea surface temperature and surface seawater aragonite saturation over the next 400 years, Coral Reefs, 31, 309–319, https://doi.org/10.1007/s00338-011-0866-8, 2012.
Mengel, M. and Levermann, A.: Ice plug prevents irreversible discharge from East Antarctica, Nat. Clim. Change, 27, 1–5, https://doi.org/10.1038/NCLIMATE2226, 2014.
Monfreda, C., Ramankutty, N., and Foley, J.: Farming the planet: 2. Geographic distribution of crop areas, yields, physiological types, and net primary production in the year 2000, Global Biogeochem. Cy., 22, 1–19, https://doi.org/10.1029/2007GB002947, 2008.
Moore, F. C. and Lobell, D. B.: The fingerprint of climate trends on European crop yields, P. Natl. Acad. Sci., 112, 2670–2675 https://doi.org/10.1073/pnas.1409606112, 2015.
Mora, C., Frazier, A. G., Longman, R. J., Dacks, R. S., Walton, M. M., Tong, E. J., Sanchez, J. J., Kaiser, L. R., Stender, Y. O., Anderson, J. M., Ambrosino, C. M., Fernandez-Silva, I., Giuseffi, L. M., and Giambelluca, T. W.: The projected timing of climate departure from recent variability, Nature, 502, 183–187, https://doi.org/10.1038/nature12540, 2013.
Mueller, B. and Seneviratne, S. I.: Hot days induced by precipitation deficits at the global scale, P. Natl. Acad. Sci. USA, 109, 12398–12403, https://doi.org/10.1073/pnas.1204330109, 2012.
Müller, C., Waha, K., Bondeau, A., and Heinke, J.: Hotspots of climate change impacts in sub-Saharan Africa and implications for adaptation and development, Global Change Biol., 20, 2505–2517, https://doi.org/10.1111/gcb.12586, 2014.
Olsson, L., Opondo, M., Tschakert, P., Agrawal, A., Eriksen, S. H., Ma, S., Perch, L. N., and Zakieldeen, S. A.: Livelihoods and poverty, in: Climate Change 2014: Impacts, Adaptation, and Vulnerability, Part A: Global and Sectoral Aspects. Contribution of Working Group II to the Fifth Assessment Report of the Intergovernmental Panel of Climate Change, edited by: Field, C. B., Barros, V. R., Dokken, D. J., Mach, K. J., Mastrandrea, M. D., Bilir, T. E., Chatterjee, M., Ebi, K. L., Estrada, Y. O., Genova, R. C., Girma, B., Kissel, E. S., Levy, A. N., MacCracken, S., Mastrandrea, P. R., and White, L. L., Cambridge University Press, Cambridge, UK and New York, NY, USA, 793–832, 2014.
O'Neill, B. C., Kriegler, E., Riahi, K., Ebi, K. L., Hallegatte, S., Carter, T. R., Mathur, R., and Vuuren, D. P.: A new scenario framework for climate change research: the concept of shared socioeconomic pathways, Climatic Change, 122, 387–400, https://doi.org/10.1007/s10584-013-0905-2, 2013.
Oppenheimer, M., Campos, M., Warren, R., Birkmann, J., Luber, G., O'Neill, B., and Kikkawa, T.: Emergent Risks and Key Vulnerabilities, in: Climate Change 2014: Impacts, Adaptation, and Vulnerability, Part A: Global and Sectoral Aspects. Contribution of Working Group II to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change, chap. 19, edited by: Field, C. B., Barros, V. R., Dokken, D., Mach, K. J., Mastrandrea, M. D., Bilir, T. E., Chatterjee, M., Ebi, K. L., Estrada, Y., Genova, R., Girma, B., Kissel, E., Levy, A., MacCracken, S., Mastrandrea, P. R., and White, L., Cambridge University Press, Cambridge, UK and New York, NY, USA, 1039–1099, 2014.
Orlowsky, B. and Seneviratne, S. I.: Global changes in extreme events: regional and seasonal dimension, Climatic Change, 110, 669–696, https://doi.org/10.1007/s10584-011-0122-9, 2012.
Perrette, M., Landerer, F., Riva, R., Frieler, K., and Meinshausen, M.: A scaling approach to project regional sea level rise and its uncertainties, Earth Syst. Dynam., 4, 11–29, https://doi.org/10.5194/esd-4-11-2013, 2013.
Porter, J., Liyong, X., Challinor, A., Cochrane, K., Howden, M., Iqbal, M., Lobell, D., and Travasso, M.: Food Security and Food Production Systems, in: IPCC 2014: Climate Change 2014: Impacts, Adaptation, and Vulnerability, Contribution of Working Group II to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change, Chapter 7, Final Draft, October 2013, IPCC AR5 WGII, Cambridge University Press, Cambridge and New York, 1–82, 2014.
Pörtner, H.-O., Karl, D. M., Boyd, P. W., Cheung, W. W. L., Lluch-Cota, S. E., Nojiri, Y., Schmidt, D. N., and Zavialov, P.: Ocean Systems, in: Climate Change 2014: Impacts, Adaptation, and Vulnerability. Part A: Global and Sectoral Aspects, Contribution of Working Group II to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change, chap. 06, edited by: Field, C. B., Barros, V. R., Dokken, D., Mach, K. J., Mastrandrea, M. D., Bilir, T. E., Chatterjee, M., Ebi, K. L., Estrada, Y., Genova, R., Girma, B., Kissel, E., Levy, A., MacCracken, S., Mastrandrea, P. R., and White, L., Cambridge University Press, Cambridge, UK and New York, NY, USA, 411–484, 2014.
Power, S., Delage, F., Chung, C., Kociuba, G., and Keay, K.: Robust twenty-first-century projections of El Niño and related precipitation variability, Nature, 502, 541–545, https://doi.org/10.1038/nature12580, 2013.
Prudhomme, C., Giuntoli, I., Robinson, E. L., Clark, D. B., Arnell, N. W., Dankers, R., Fekete, B. M., Franssen, W., Gerten, D., Gosling, S. N., Hagemann, S., Hannah, D. M., Kim, H., Masaki, Y., Satoh, Y., Stacke, T., Wada, Y., and Wisser, D.: Hydrological droughts in the 21st century, hotspots and uncertainties from a global multimodel ensemble experiment, P. Natl. Acad. Sci., 111, 3262–3267, https://doi.org/10.1073/pnas.1222473110, 2013.
Riahi, K., Grübler, A., and Nakicenovic, N.: Scenarios of long-term socio-economic and environmental development under climate stabilization, Technol. Forecast. Social Change, 74, 887–935, https://doi.org/10.1016/j.techfore.2006.05.026, 2007.
Rignot, E., Mouginot, J., Morlighem, M., Seroussi, H., and 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, https://doi.org/10.1002/2014GL060140, 2014.
Robinson, A., Calov, R., and Ganopolski, A.: Multistability and critical thresholds of the Greenland ice sheet, Nat. Clim. Change, 2, 429–432, https://doi.org/10.1038/nclimate1449, 2012.
Rogelj, J., Meinshausen, M., and Knutti, R.: Global warming under old and new scenarios using IPCC climate sensitivity range estimates, Nat. Clim. Change, 2, 248–253, https://doi.org/10.1038/nclimate1385, 2012.
Rogelj, J., McCollum, D. L., Reisinger, A., Meinshausen, M., and Riahi, K.: Probabilistic cost estimates for climate change mitigation, Nature, 493, 79–83, https://doi.org/10.1038/nature11787, 2013.
Rogelj, J., Meinshausen, M., Sedláček, J., and Knutti, R.: Implications of potentially lower climate sensitivity on climate projections and policy, Environ. Res. Lett., 9, 031003, https://doi.org/10.1088/1748-9326/9/3/031003, 2014.
Rogelj, J., Luderer, G., Pietzcker, R. C., Kriegler, E., Schaeffer, M., Krey, V., and Riahi, K.: Energy system transformations for limiting end-of-century warming to below 1.5 °C, Nat. Clim. Change, 5, 519–527, https://doi.org/10.1038/nclimate2572, 2015.
Rosenzweig, C., Elliott, J., Deryng, D., Ruane, A. C., Müller, C., Arneth, A., Boote, K. J., Folberth, C., Glotter, M., Khabarov, N., Neumann, K., Piontek, F., Pugh, T. A. M., Schmid, E., Stehfest, E., Yang, H., and Jones, J. W.: Assessing agricultural risks of climate change in the 21st century in a global gridded crop model intercomparison, P. Natl. Acad. Sci. USA, 11, 3268–3273, https://doi.org/10.1073/pnas.1222463110, 2014.
Schaeffer, M., Hare, W., Rahmstorf, S., and Vermeer, M.: Long-term sea-level rise implied by 1.5 °C and 2 °C warming levels, Nat. Clim. Change, 2 , 867–870, https://doi.org/10.1038/nclimate1584, 2012.
Schellnhuber, H.-J., Hare, W. L., Serdeczny, O., Adams, S., Coumou, D., Frieler, K., Marin, M., Otto, I. M., Perrette, M., Robinson, A., Rocha, M., Schaeffer, M., Schewe, J., Wang, X., and Warszawski, L.: Turn Down the Heat: Why a 4 °C Warmer World Must be Avoided, Tech. rep., commissioned by the World Bank, Washington, D.C., 2012.
Schellnhuber, H. J., Hare, B., Serdeczny, O., Schaeffer, M., Adams, S., Baarsch, F., Schwan, S., Coumou, D., Robinson, A., Vieweg, M., and others: Turn down the heat: climate extremes, regional impacts, and the case for resilience, Tech. rep., commissioned by the World Bank, Washington, D.C., 2013.
Schellnhuber, H. J., Reyer, C., Hare, B., Waha, K., Otto, I. M., Serdeczny, O., Schaeffer, M., Schleuß ner, C.-F., Reckien, D., Marcus, R., Kit, O., Eden, A., Adams, S., Aich, V., Albrecht, T., Baarsch, F., Boit, A., Canales Trujillo, N., Cartsburg, M., Coumou, D., Fader, M., Hoff, H., Jobbins, G., Jones, L., Krummenauer, L., Langerwisch, F., Le Masson, V., Ludi, E., Mengel, M., Möhring, J., Mosello, B., Norton, A., Perette, M., Pereznieto, P., Rammig, A., Reinhardt, J., Robinson, A., Rocha, M., Sakschewski, B., Schaphoff, S., Schewe, J., Stagl, J., and Thonicke, K.: Turn Down the Heat: Confronting the New Climate Normal, Tech. rep., commissioned by the World Bank, Washington, D.C., 2014.
Schewe, J., Heinke, J., Gerten, D., Haddeland, I., Arnell, N. W., Clark, D. B., Dankers, R., Eisner, S., Fekete, B. M., Colon-Gonzalez, F. J., Gosling, S. N., Kim, H., Liu, X., Masaki, Y., Portmann, F. T., Satoh, Y., Stacke, T., Tang, Q., Wada, Y., Wisser, D., Albrecht, T., Frieler, K., Piontek, F., Warszawski, L., and Kabat, P.: Multimodel assessment of water scarcity under climate change, P. Natl. Acad. Sci., 111, 3245–3250, https://doi.org/10.1073/pnas.1222460110, 2014.
Schleussner, C.-F., Levermann, A., and Meinshausen, M.: Probabilistic Projections of the Atlantic Overturning, 127, 579–586, https://doi.org/10.1007/s10584-014-1265-2, 2014
Schleussner, C. F., Runge, J., Lehmann, J., and Levermann, A.: The role of the North Atlantic overturning and deep-ocean for multi-decadal global-mean-temperature variability, Earth Syst. Dynam., 4, 967–1013, https://doi.org/10.5194/esdd-4-967-2013, 2014b.
SED: UNFCCC: Report on the Structured Expert Dialogue (SED) on the 2013–2015 review, FCCC/SB/2015/INF.1, 2015.
Seneviratne, S. I., Donat, M. G., Pitman, A. J., Knutti, R., and Wilby, R. L.: Allowable CO2 emissions based on regional and impact-related climate targets, Nature, 1870, 1–7, https://doi.org/10.1038/nature16542, 2016.
Sillmann, J., Kharin, V. V., Zhang, X., Zwiers, F. W., and Bronaugh, D.: Climate extremes indices in the CMIP5 multimodel ensemble: Part 1. Model evaluation in the present climate, J. Geophys. Res.-Atmos., 118, 1716–1733, https://doi.org/10.1002/jgrd.50203, 2013a.
Sillmann, J., Kharin, V. V., Zhang, X., Zwiers, F. W., and Bronaugh, D.: Climate extremes indices in the CMIP5 multimodel ensemble: Part 2. Future climate projections, J. Geophys. Res.-Atmos., 118, 2473–2493, https://doi.org/10.1002/jgrd.50188, 2013b.
Sippel, S., Zscheischler, J., Heimann, M., Otto, F. E. L., Peters, J., and Mahecha, M. D.: Quantifying changes in climate variability and extremes: Pitfalls and their overcoming, Geophys. Res. Lett., 42, 9990–9998, https://doi.org/10.1002/2015GL066307, 2015.
Smith, K. R., Woodward, A., Campbell-Lendrum, D., Chadee, D., Honda, Y., Liu, Q., Olwoch, J., Revich, B., and Sauerborn, R.: Human Health: Impacts, Adaptation, and Co-Benefits, in: Climate Change 2014: Impacts, Adaptation, and Vulnerability, Contribution of Working Group II to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change, chap. 11, edited by: Field, C. B., Barros, V. R., Dokken, D., Mach, K. J., Mastrandrea, M. D., Bilir, T. E., Chatterjee, M., Ebi, K. L., Estrada, Y., Genova, R., Girma, B., Kissel, E., Levy, A., MacCracken, S., Mastrandrea, P. R., and White, L., Cambridge University Press, Cambridge, UK and New York, NY, USA, 709–754, 2014.
Tai, A. P. K., Martin, M. V., and Heald, C. L.: Threat to future global food security from climate change and ozone air pollution, Nat. Clim. Change, 4, 817–821, https://doi.org/10.1038/nclimate2317, 2014.
Taylor, K. E., Stouffer, R. J., and Meehl, G. A.: An Overview of CMIP5 and the Experiment Design, B. Am. Meteorol. Soc., 93, 485–498, https://doi.org/10.1175/BAMS-D-11-00094.1, 2011.
Tebaldi, C. and Arblaster, J. M.: Pattern scaling: Its strengths and limitations, and an update on the latest model simulations, Climatic Change, 122, 459–471, https://doi.org/10.1007/s10584-013-1032-9, 2014.
Tebaldi, C. and Friedlingstein, P.: Delayed detection of climate mitigation benefits due to climate inertia and variability, P. Natl. Acad. Sci., 110, 17229–17234, https://doi.org/10.1073/pnas.1300005110, 2013.
Tebaldi, C., Arblaster, J. M., and Knutti, R.: Mapping model agreement on future climate projections, Geophys. Res. Lett., 38, L23701, https://doi.org/10.1029/2011GL049863, 2011.
Teh, L. S. L., Teh, L. C. L., and Sumaila, U. R.: A Global Estimate of the Number of Coral Reef Fishers, PLoS ONE, 8, e65397, https://doi.org/10.1371/journal.pone.0065397, 2013.
Timmermann, R. and Hellmer, H. H.: Southern Ocean warming and increased ice shelf basal melting in the twenty-first and twenty-second centuries based on coupled ice-ocean finite-element modelling, Ocean Dynam., 63, 1011–1026, https://doi.org/10.1007/s10236-013-0642-0, 2013.
UNFCCC – United Nations Framework Convention on Climate Change: Framework Convention on Climate Change, United Nations (UN), New York, 1992.
UNFCCC: Decision 1/CP.21. The Paris Agreement, 2015.
Vaughan, M. M., Huffaker, A., Schmelz, E. A., Dafoe, N. J., Christensen, S., Sims, J., Martins, V. F., Swerbilow, J., Romero, M., Alborn, H. T., Allen, L. H., and Teal, P. E. A.: Effects of elevated CO2 on maize defence against mycotoxigenic Fusarium verticillioides, Plant Cell Environ., 37, 2691–2706, https://doi.org/10.1111/pce.12337, 2014.
Wada, Y., van Beek, L. P. H., Sperna Weiland, F. C., Chao, B. F., Wu, Y.-H., and Bierkens, M. F. P.: Past and future contribution of global groundwater depletion to sea-level rise, Geophys. Res. Lett., 39, 1–6, https://doi.org/10.1029/2012GL051230, 2012.
Warszawski, L., Frieler, K., Huber, V., Piontek, F., Serdeczny, O., and Schewe, J.: The Inter-Sectoral Impact Model Intercomparison Project (ISI-MIP): Project framework, P. Natl. Acad. Sci. USA, 111, 3228–3232, https://doi.org/10.1073/pnas.1312330110, 2014.
Werner, A. D., Bakker, M., Post, V. E. A., Vandenbohede, A., Lu, C., Ataie-Ashtiani, B., Simmons, C. T., and Barry, D. A.: Seawater intrusion processes, investigation and management: Recent advances and future challenges, Adv. Water Resour., 51, 3-26, https://doi.org/10.1016/j.advwatres.2012.03.004, 2013.
Wigley, T. M. L. and Raper, S. C. B.: Extended scenarios for glacier melt due to anthropogenic forcing, Geophys. Res. Lett., 32, L05704, https://doi.org/10.1029/2004GL021238, 2005.
Zhang, X., Alexander, L., Hegerl, G. C., Jones, P., Tank, A. K., Peterson, T. C., Trewin, B., and Zwiers, F. W.: Indices for monitoring changes in extremes based on daily temperature and precipitation data, Wiley Interdisciplinary Reviews: Climate Change, 2, 851–870, https://doi.org/10.1002/wcc.147, 2011.