New satellite data reveals sea-level rise
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.
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Given the fact that ocean water is seldom if ever smooth and flat near land how do they account for a signal that is being returned off of an incoming swell? For people who have worked with radar ranging equipment around water this doesn't ring true. For people who know nothing about radar beyond what the media, or some Hollywood movie, has "informed" them I'm sure they'll buy it.