1 August, 2010

Persistence of Atoll Islands under sea level rise

A recent study comparing satellite images with older aerial pictures of 27 central-Pacific Atoll islands found only 14% of the studied islands decreased in net land area, whereas 43% increased in net area. These observations showed that the gross change in island area was generally much larger than changes in net area. This means most islands were observed to be ‘dynamic’: shorelines have shifted, with erosion on one side mostly compensated or overcompensated by accretion on another side, in most cases providing growth, of net land area.