Wednesday, October 3rd 2012, 6:20 AM EDT
(CNN) -- 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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