Sea level rise: Why 13.1 million Americans might need to move

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Up to 13.1 million people could be at risk from sea level rise in coastal communities in the United States by the end of this century, according to new research.

The study, published Monday, coupled projections of population growth with location-specific environmental data to produce small-scale assessments of how individual communities could be affected.

The estimates emerging from this survey depend upon both sea level rises and population trends.

Records and research show that sea level has been steadily rising at a rate of 0.04 to 0.1 inches per year since 1900.

Since 1992, new methods of satellite altimetry (the measurement of elevation or altitude) indicate a rate of rise of 0.12 inches per year. This is a significantly larger rate than the sea-level rise averaged over the last several thousand years.


http://www.csmonitor.com/Science/2016/0314/Sea-level-rise-Why-13.1-million-Americans-might-need-to-move
 
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Sea-levels are rising unevenly around the world, with Pacific countries in particular suffering significant increases over the past two decades, according to accurate new satellite data.

On average, global sea-levels have been rising at about three millimeters (mm) a year, however, this masks large differences between regions of the world.

While some regions have seen sea-level rises of 12 mm a year, others have actually seen decreases of about 12 mm a year.

The results are based on radar readings from the European Space Agency (ESA) over an 18-year period from October 1992 to March 2010.

ESA used its satellites to send radar pulses to the sea surface below, recording the time delay in its return and creating a precise measurement of their height above the surface.

In Venice, where the sea-level data was released, engineers are constructing a new set of tidal barriers to protect the historic city.

The city, which attracts millions of tourists every year, is seeing sea-level rises of around 2 mm per year.

http://www.cnn.com/2012/10/02/tech/satellites-sea-level-rise/
 
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