Current sea level rise
hideCurrent sea level rise has occurred at a mean rate of 1.8 mm per year for the past century, and more recently at rates estimated near 2.8 ± 0.4 to 3.1 ± 0.7 mm per year (1993-2003). Current sea level rise is due partly to human-induced global warming, which will increase sea level over the coming century and longer periods. Increasing temperatures result in sea level rise by the thermal expansion of water and through the addition of water to the oceans from the melting of continental ice sheets. Thermal expansion, which is well-quantified, is currently the primary contributor to sea level rise and is expected to be the primary contributor over the course of the next century. Glacial contributions to sea-level rise are less important, and are more difficult to predict and quantify. Values for predicted sea level rise over the course of the next century typically range from 90 to 880 mm, with a central value of 480 mm. Based on an analog to the deglaciation of North America at 9,000 years before present, some scientists predict sea level rise of 1.3 meters in the next century. However, models of glacial flow in the smaller present-day ice sheets show that a probable maximum value for sea level rise in the next century is 80 centimeters, based on limitations on how quickly ice can flow below the equilibrium line altitude and to the sea.
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News tagged with sea level rise
Mysteriously warm times in Antarctica
Space & Earth / Earth Sciences
Nov 18, 2009 |
4.2 / 5 (26) |
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(PhysOrg.com) -- A new study of Antarctica's past climate reveals that temperatures during the warm periods between ice ages (interglacials) may have been higher than previously thought. The latest analysis ...
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Greenland ice cap melting faster than ever
Space & Earth / Earth Sciences
Nov 12, 2009 |
3.6 / 5 (32) |
25
Satellite observations and a state-of-the art regional atmospheric model have independently confirmed that the Greenland ice sheet is loosing mass at an accelerating rate, reports a new study in Science.
Dutch build more dunes against rising seas
Nov 20, 2009 |
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On the beach at Monster, bulldozers painstakingly turn sand dredged from the bottom of the North Sea bed into dunes in an ambitious effort to safeguard the Netherlands from flooding.
Hawaii's famed white sandy beaches are shrinking
Nov 15, 2009 |
5 / 5 (1) |
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(AP) -- Jenn Boneza remembers when the white sandy beach near the boat ramp in her hometown was wide enough for people to build sand castles.
Antarctic ice loss vaster, faster than thought: study
Space & Earth / Earth Sciences
Nov 22, 2009 |
3.8 / 5 (50) |
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The East Antarctic icesheet, once seen as largely unaffected by global warming, has lost billions of tonnes of ice since 2006 and could boost sea levels in the future, according to a new study.
Australian scientists call for urgent 'global cooling' to save coral reefs
Nov 09, 2009 |
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(PhysOrg.com) -- Australian marine scientists have issued an urgent call for massive and rapid worldwide cuts in carbon emissions, deep enough to prevent atmospheric CO2 levels rising to 450 parts per million (ppm).
New insight into predicting cholera epidemics in the Bengal Delta
Nov 04, 2009 |
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Cholera, an acute diarrheal disease caused by the bacterium Vibrio cholerae, has reemerged as a global killer. Outbreaks typically occur once a year in Africa and Latin America. But in Bangladesh the epidemics occur twice ...
Climate experts debate strategies for reducing atmospheric carbon and future warming
Nov 25, 2009 |
2.6 / 5 (13) |
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(PhysOrg.com) -- Reducing carbon dioxide to safe levels may require extracting carbon from the air, says Cornell climate researcher.
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