Accessed November 18 2019. Potential Sea-Level Changes. The second mechanism is the melting of ice over land, which then adds water to the ocean. Their experts concluded that even with lowest possible greenhouse gas emission pathways, global mean sea level would rise at least 8 inches (0.2 meters) above 1992 levels by 2100. From the 1970s up through the last decade or so, melting and heat expansion were contributing roughly equally to observed sea level rise. The scenarios differ based on potential future rates of greenhouse gas emissions and differences in the plausible rates of glacier and ice sheet loss. Large images: 1917 | 2005. (2013). In the early 20th century, the glacier met the water and calved icebergs into a marginal lake near the bay. Chapter 3: Polar regions. In 2012, at the request of the U.S. Allen, J. Boschung, A. Nauels, Y. Xia, V. Bex and P.M. Midgley (eds.)]. To squeeze or stretch the graph in either direction, hold your Shift key down, then click and drag. In press. NASA photo by Maria-José Viñas. High-tide flooding is already a serious problem in many coastal communities, and it is only expected to get much worse in the future with continued rising seas. South Beach, Miami on May 3, 2007. The early part of the time series shown in the graph above comes from the sea level group of CSIRO (Commonwealth Scientific and Industrial Research Organisation), Australia's national science agency. Our large watersheds supply safe and clean drinking water to the greater Seattle area. Seattle Public Utilities (SPU) is comprised of three major direct-service providing utilities: the Water Utility, the Drainage and Wastewater Utility, and the Solid Waste Utility. As seas rise, saltwater is also contaminating freshwater aquifers, many of which sustain municipal and agricultural water supplies and natural ecosystems. A third, much smaller contributor to sea level rise is a decline in the amount of liquid water on land—aquifers, lakes and reservoirs, rivers, soil moisture. Explore information about some of Seattle Public Utilities' completed construction projects, including summaries and documentation. Photos courtesy of Louis H. Pedersen (1917) and Bruce F. Molina (2005), obtained from the Glacier Photograph Collection, Boulder, Colorado USA: National Snow and Ice Data Center/World Data Center for Glaciology. Pedersen Glacier, at Aialik Bay in Alaska’s Kenai Mountains, in 1917 (left) and 2005 (right). By 2005, the glacier had retreated, and the lake had become a small grassland. Based on their new scenarios, global sea level is very likely to rise at least 12 inches (0.3 meters) above 2000 levels by 2100 even on a low-emissions pathway. Address:
[online] http://cpo.noaa.gov/sites/cpo/Reports/2012/NOAA_SLR_r3.pdf. It is based on a weighted average of 373 global tide gauge records collected by the U.S. National Ocean Service, UHSLC, and partner agencies worldwide. NOAA Tech Memo OAR CPO-1. Pelto, M. (2019). The rate of sea level rise is accelerating: it has more than doubled from 0.06 inches (1.4 millimeters) per year throughout most of the twentieth century to 0.14 inches (3.6 millimeters) per year from 2006–2015. The Social Vulnerability Index , which shows areas of high human vulnerability to hazards, is based on population attributes from Census 2010 (e.g., age and poverty) and the built environment. The Water Utility provides more than 1.3 million customers in King County with a reliable water supply; the Drainage and Wastewater Utility collects and disposes of sewage and storm water; and the Solid Waste Utility collects and disposes of recycling, yard waste, and residential and commercial garbage. Rep. NOS CO-OPS 083. If Earth's climate continues to warm, then the volume of present-day ice sheets will decrease. Globally, sea levels have risen about 7 inches since the beginning of the 20th century. Church, J.A., P.U. NOAA Center for Operational Oceanographic Products and Services. This is an increase of 0.24 inches (6.1 mm) from 2018. From these gravity shifts, scientists estimate the amount of added water. Deeper temperatures are measured by instruments lowered from oceanographic research ships. Nerem, P.D. Pedersen Glacier, at Aialik Bay in Alaska’s Kenai Mountains, in 1917 (left) and 2005 (right). Both the low-end and “worst-case” possibilities were revised upward in 2017 following a review by the U.S. Interagency Sea Level Rise Taskforce. By the end of the century, global mean sea level is likely to rise at least one foot (0.3 meters) above 2000 levels, even if greenhouse gas emissions follow a relatively low pathway in coming decades. View central estimates. (2016). In all cases, however, rising sea levels are increasing coastal flood risk. 75pp. When water shifts from land to ocean, the increase in mass increases the strength of gravity over oceans by a small amount. Seattle has over 1,200 miles of sewer pipe. In the early 20th century, the glacier met the water and calved icebergs into a marginal lake near the bay. In no event will The City of Seattle be liable for any loss or damage including without limitation, indirect or consequential loss or damage, or any loss or damage whatsoever arising from loss of data or profits arising out of, or in connection with, the use of any SLR information. By the end of the century, global mean sea level is likely to rise at least one foot (0.3 meters) above 2000 levels, even if greenhouse gas emissions follow a relatively low pathway in coming decades. Sea level rise and nuisance flood frequency changes around the U.S. NOAA Technical Report NOS CO-OPS 73, 53p. (The global mean surface air temperature for that period was estimated to be 14°C (57°F), with an uncertainty of several tenths of a degree.) For the densely populated Atlantic seaboard north of Virginia and the western Gulf of Mexico, sea level rise will likely be higher than the global average for all pathways. From 2018 to 2019, global sea level rose 0.24 inches (6.1 millimeters). Surveys in Geophysics, 32(4-5), 585–602. Photos courtesy of Louis H. Pedersen (1917) and Bruce F. Molina (2005), obtained from the Glacier Photograph Collection, Boulder, Colorado USA: National Snow and Ice Data Center/World Data Center for Glaciology. The global mean water level in the ocean rose by 0.14 inches (3.6 millimeters) per year from 2006–2015, which was 2.5 times the average rate of 0.06 inches (1.4 millimeters) per year throughout most of the twentieth century. The values are shown as change in sea level in millimeters compared to the 1993-2008 average. There are many opportunities for you to become involved and help us keep Seattle great. The pace of global sea level rise more than doubled from 1.4 mm per year throughout most of the twentieth century to 3.6 mm per year from 2006–2015. Fires and floods: maps of Europe predict scale of climate catastrophe This article is more than 10 months old Without urgent action, rising sea levels by end of century could leave cities under water Learn environmentally friendly ways you can save money on utilities. SPU has several financial assistance resources available, including flexible payment plans, utility discounts, and emergency bill assistance. Sea level is measured by two main methods: tide gauges and satellite altimeters. View our garbage, recycling, and food & yard waste (compost) services, find the nearest transfer station (dump/landfill) for extra waste, and learn about your collection day. Church, J. Climate change impacts the world’s water in complex ways. Nuisance flooding in Annapolis in 2012. [online pdf] http://www.star.nesdis.noaa.gov/sod/lsa/SeaLevelRise/documents/NOAA_NESD.... Accessed November 18, 2019. 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The interactive map, produced by Climate Central, shows the change in the UK in the next 30 years because of rising sea levels. Using data from scores of stations around the world, scientists can calculate a global average and adjust it for seasonal differences. Our connection to the community is very important. Volunteer to remove graffiti or join a cleaning event. Ice loss from the Greenland Ice Sheet increased seven-fold from 34 billion tons per year between 1992-2001 to 247 billion tons per year between 2012 and 2016. The light blue line shows seasonal (3-month) sea level estimates from Church and White (2011). NOAA Tech. Construction projects can learn how to salvage or dispose of solid waste during and after the build, including hauling requirements and dust control. Explore the programs we offer for you to learn about the environment and get involved. Melt streams on the Greenland Ice Sheet on July 19, 2015. The map illustrates how climate change could affect the global economy as regions connected by trade are affected by changes in crop yield, droughts, flooding and high temperatures. About the data used in the interactive graph. Climate change encompasses not only rising average temperatures but also extreme weather events, shifting wildlife populations and habitats, rising seas, and a range of other impacts. Also read about what to do if your bill seems too high. Sweet, W.V., Kopp, R.E., Weaver, C.P., Obeysekera, T., Horton, R.M., Thieler, E.R., and Zervas, C. (2017). Zoom into a familiar location, create a point, and share your story. Ice loss from the Greenland and Antarctic Ice Sheets as well as alpine glaciers has accelerated in recent decades. Will your city or county be flooded by 2020? In the natural world, rising sea level creates stress on coastal ecosystems that provide recreation, protection from storms, and habitat for fish and wildlife, including commercially valuable fisheries. Changes in ocean currents such as the Gulf Stream can also affect sea levels by pushing more water against some coastlines and pulling it away from others, raising or lowering sea levels accordingly. The budget of recent global sea level rise: 1995-2013. In: Climate Change 2013: The Physical Science Basis. We're here to help. The pace of sea level rise accelerated beginning in the 1990s, coinciding with acceleration in glacier and ice sheet melting. Payne, W.T. Observed sea level since the start of the satellite altimeter record in 1993 (black line), plus independent estimates of the different contributions to sea level rise: thermal expansion (red) and added water, mostly due to glacier melt (blue). Vital Signs of the Planet: Global Climate Change and Global Warming. In press. Allen, J. Boschung, A. Nauels, Y. Xia, V. Bex and P.M. Midgley (eds.)]. [Online: https://tidesandcurrents.noaa.gov/publications/NOAA_Technical_Report_NOS_COOPS_073.pdf], Global Ocean Heat and Salt Content page at NCEI, Tides and Currents Sea Level Trends page at the National Ocean Service, Digital Coast Sea Level Rise Viewer at the Coastal Services Center, Coastal Flood Risk page at the U.S. King Tides: Snap the Shore, See the Future A collaboration of NOAA’s Office for Coastal Management and the King Tides Project to help people understand the global impact of sea level rise. NOAA Climate.gov graph, adapted from Figure 8 in Sweet et al., 2017. http://doi.org/10.1007/s10712-011-9119-1, Domingues, R., Goni, G., Baringer, M., & Volkov, D. (2018). https://report.ipcc.ch/srocc/pdf/SROCC_SPM_Approved.pdf. Interactive Map Climate change Snapshots of a warming world. Sea level has risen 8–9 inches (21–24 centimeters) since 1880. 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