Proceedings of the National Academy of Sciences, May 2019, 201817205; DOI:10.1073/pnas.1817205116 Every global shore touches the same ocean, and the ocean is rising. Kulp, S. A. Economic losses in China would matter for the rest of the world: the country is responsible for more than a quarter of the growth in today’s global economy and is projected to remain the world’s biggest economy, in purchasing power parity terms, in 2050. Sea level can rise by two different mechanisms with respect to climate change. “Cities boom and bust,” said Benjamin Strauss, coauthor of the new study and vice president for sea level and climate impacts at Climate Central, which researches and reports on climate change. 18. Climate Central surveys and conducts scientific research on climate change and informs the public of key findings. Stocker, T. et al. Impacts of Antarctic fast dynamics on sea-level projections and coastal flood defense. By overlaying social and economic data on a map that depicts sea level rise, a community can see the potential impact that sea level rise can have on vulnerable people and businesses. Human-caused climate change is creating more coastal flood days in the U.S. New analysis looks at the human-caused influence on the number of coastal flood days for various locations across the U.S. As the climate warms, rising sea levels will mean more damage from hurricane storm surge. Sea-level projections representing the deeply uncertain contribution of the West Antarctic ice sheet. Climate Central surveys and conducts scientific research on climate change and informs the public of key findings. World Meteorological Organization / Flickr, Interactive threat maps at coastal.climatecentral.org, Spreadsheet with country-level threats (CSV), http://doi.org/10.1038/s41598-017-04134-5, https://iopscience.iop.org/article/10.1088/1748-9326/7/1/014032/meta, https://doi.org/10.1007/s10584-016-1664-7, https://iopscience.iop.org/article/10.1088/1748-9326/aa6cb3/meta. Sefrioui S. (2017) Adapting to Sea Level Rise: A Law of the Sea Perspective. Kopp, R. E., DeConto, R. M., Bader, D. A., Hay, C. C., Horton, R. M., Kulp, S., Oppenheimer, M., Pollard, D., & Strauss, B. H. (2017). Back to top Res. In low-elevation coastal areas in the United States with population densities over 50,000 people per square mile, such as parts of Boston, Miami, and New York City, SRTM overestimates elevation by 15.5 feet on average. The second mechanism is the melting of ice over land, which then adds water to the ocean. Climate Central then added up populations (Landscan 2010) within the identified areas to compute how many people today live on implicated land. Climate Central calculated that “roughly three-quarters of the tidal flood days now occurring in towns along the East Coast would not be happening in the absence of the rise in the sea level caused by human emissions.” (See “Storms and Flooding” below.) Risk Finder includes projections, analysis, and downloadable graphics and reports for every coastal city, county, and state -- and more -- in the contiguous U.S. Explore where, when and what could be impacted near you. Sea level rise is a global story, and it affects every coastal nation. National Bureau of Statistics of China, National Data, custom information acquired via website. Global warming has raised global sea level about 8 inches since 1880, and the rate of rise is accelerating. Melting ice sheets will cause higher sea-level rise in the state due to how the Earth rotates and gravitational pull on the waters Climate Central built Surging Seas Risk Finder as a free web tool to help U.S. communities, planners and leaders better understand sea level rise and coastal flood risks. Kopp, R. E., R. M. Horton, C. M. Little, J. X. Mitrovica, M. Oppenheimer, D. J. Rasmussen, B. H. Strauss, and C. Tebaldi (2014). It is the peer-reviewed scientific paper upon which this report is based. By 2050, these projections increase to 4 and 19 inches, respectively. & Grinsted, A. https://doi.org/10.1007/978-3-319-51274-7_1 Moreover, such features are costly and require significant maintenance on an ongoing basis in order to be effective; in the U.S., for example, the American Society of Civil Engineers estimated in 2013 that only 8% of existing levees it had monitored were in “acceptable” condition. However, this report focuses on median projections from a sea level rise model that does not incorporate the higher end of potential ice sheet sensitivity (Kopp et al. In recent years, scientists have suggested that the sensitivity of Greenland and especially Antarctic ice sheets to global warming could make the global ocean rise more quickly than previously believed. Back to top Scientists have long worked to project how quickly various amounts of global warming could raise the level of the world’s oceans—a question about which much uncertainty remains, given the challenges of understanding how ice sheets will respond to the extreme pace of warming they are now experiencing. 4) Climate scenarios. Bakker, A. M. R., Wong, T. E., Ruckert, K. L. & Keller, K. Sea-level projections representing the deeply uncertain contribution of the West Antarctic ice sheet. Shortridge, A. In the Maldives, the figure is one in three. A flood peaking at a certain height will generally not inundate 100 percent of the nearby area below that height, if the flood peaks and redescends rapidly. Note that the coral rings “float” with the sea level, and because they are living things, they rise with the sea level as new coral grows. “Evaluating the Economic Cost of Coastal Flooding,” CEPR Discussion Papers 13128, C.E.P.R. Ocean currents, the upwelling of cold water from the deep ocean, winds, movements of heat and freshwater, and Earth’s gravitational pull all play a role in moving water masses around. Chart 1. To the many organizations that have financially supported Climate Central and its sea level program, including The Kresge Foundation and The Schmidt Family Foundation. The key variables will be how much warming pollution humanity dumps into the atmosphere and how quickly the land-based ice sheets in Greenland and especially Antarctica destabilize. 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