Global sea-level rise: weighing country responsibility and risk
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Accelerated sea-level rise will be one of the most significant effects of global warming. Global mean sea level has risen more than 0.2 m since 1880 and continues rising at above 4 mm yr.−1. Here we allocate responsibility to countries for global sea-level rise commitment (SLRC) over the period 1850 to 2100 and weigh that against their exposure to inundation from sea-level rise. We bridge two lines of climate-related research by combining assessment of countries’ greenhouse gas emissions with predictions of the multi-millennial sea level response to global warming. Under the Intergovernmental Panel on Climate Change’s business-as-usual scenario our findings show that the five most responsible countries for global SLRC are also the most exposed to absolute land loss. This is mostly due to their own emissions, which we call intrinsic risk. We also assess extrinsic risk, defined as a country’s land exposed to inundation due to all other countries’ emissions. We show that for 6 m of global SLRC, the two non-island countries with the highest extrinsic risk are predicted to lose 27 % and 15 % of their own land, yet contributed less than 1.1 % each to the emissions driving SLRC. We anticipate that our findings will directly inform policy discussions in international climate negotiations by identifying the relative degree of country responsibility and risk associated with sea-level rise.
This material is based upon country-level GHG emissions research conducted by Ward and Mahowald (2014). We thank Dr. Ward for sharing the emissions data for countries and for feedback on an earlier version of the manuscript.
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Conflict of interest
The authors declare that they have no conflict of interest.
- Adger WN, Paavola J, Huq S, Mace MJ (2006) Fairness in adaptation to climate change. MIT Press, CambridgeGoogle Scholar
- Albert S, Leon JX, Grinham AR, Church JA, Gibbes BR, Woodroffe CD (2016) Interactions between sea-level rise and wave exposure on reef island dynamics in the Solomon Islands. Environ Res Lett 11:054011Google Scholar
- Dutton A, Carlson AE, Long AJ, Milne GA, Clark PU, DeConto R, Horton BP, Rahmstorf S, Raymo ME (2015) Sea-level rise due to polar ice-sheet mass loss during past warm periods. Science 349:153Google Scholar
- Farr TG, Rosen PA, Caro E, Crippen R, Duren R, Hensley S, Kobrick M, Paller M, Rodriguez E, Roth L, Seal D, Shaffer S, Shimada J, Umland J, Werner M, Oskin M, Burbank D, Alsdorf D (2007) The shuttle radar topography mission. Rev Geophys 45:RG2004Google Scholar
- Hansen J, Sato M, Hearty P, Ruedy R, Kelley M, Masson-Delmotte V, Russell G, Tselioudis G, Cao J, Rignot E, Velicogna I, Tormey B, Donovan B, Kandiano E, von Schuckmann K, Kharecha P, Legrande AN, Bauer M, Lo KW (2016) Ice melt, sea level rise and superstorms: evidence from paleoclimate data, climate modeling, and modern observations that 2 °C global warming could be dangerous. Atmos Chem Phys 16:3761–3812CrossRefGoogle Scholar
- Hauer ME, Evans JM, Mishra DR (2016) Millions projected to be at risk from sea-level rise in the continental United States. Nat Clim Chang. doi: 10.1038/NCLIMATE2961. Advance online publication
- IPCC (2013) Climate change 2013: the physical science basis. Contribution of working group I to the fifth assessment report of the intergovernmental panel on climate change. Cambridge University Press, CambridgeGoogle Scholar
- Jarvis A, Reuter HI, Nelson A, Guevara E (2008) Hole-filled SRTM for the globe Version 4, available from the CGIAR-CSI SRTM 90 m Database (http://srtm.csi.cgiar.org)
- Jevrejeva S, Moore JC, Grinsted A, Woodworth PL (2008) Recent global sea level acceleration started over 200 years ago? Geophys Res Lett 35:L08715Google Scholar
- Kelso NV, Patterson T (2010) Introducing natural earth data - naturalearthdata.com. Geographia Technica 5:82–89Google Scholar
- Kopp RE, Horton RM, Little CM, Mitrovica JX, Oppenheimer M, Rasmussen DJ, Strauss BH, Tebaldi C (2014) Probabilistic 21st and 22nd century sea-level projections at a global network of tide-gauge sites. Earth's Future 2:383–406Google Scholar
- NOAA (2012) Detailed methodology for mapping sea-level rise inundation. NOAA Coastal Services Center. URL: https://coast.noaa.gov/slr/assets/pdfs/Inundation_Methods.pdf
- Strauss BH, Kulp S, Levermann A (2015b) Mapping choices: carbon, climate, and rising seas, our global legacy. Climate Central Research Report, Princeton, pp 1–38Google Scholar
- United Nations (2015) World population prospects: The 2015 revision, key findings and advance tables. Department of Economic and Social Affairs, Population Division. Working Paper No. ESA/P/WP.241Google Scholar
- Wei T, Yang S, Moore JC, Shi P, Cui X, Duan Q, Xu B, Dai Y, Yuan W, Wei X, Yang Z, Wen T, Teng F, Gao Y, Chou J, Yan X, Wei Z, Guo Y, Jiang Y, Gao X, Wang K, Zheng X, Ren F, Lv S, Yu Y, Liu B, Luo Y, Li W, Ji D, Feng J, Wu Q, Cheng H, He J, Fu C, Ye D, Xu G, Dong W (2012) Developed and developing world responsibilities for historical climate change and CO2 mitigation. Proc Natl Acad Sci 109:12911–12915CrossRefGoogle Scholar