Pacific islands growing not sinking as sea levels rise News The Week UK
Pacific islands previously thought to be on the verge of disappearing under the waves because of climate change are actually getting larger, according to scientists.
Kiribati (
above), Tuvalu and the Federated States of Micronesia are among the countries whose islands have grown, according to the study, which appears in Global and Planetary Change.
Paul Kench at the University of Auckland in New Zealand and Arthur Webb at the South Pacific Applied Geoscience Commission in Fiji conducted their study using historical aerial photography and satellite images of 27 coral atoll islands in the central Pacific to observe changes over the last 19 to 61 years. During that time, sea levels have actually risen by 2mm per year.
They found that 23 of the islands either maintained the same land area or increased in size, while only four suffered a net loss to the sea. Kench told the
New Scientist: "It has been thought that as the sea level goes up, islands will sit there and drown. But they won't. The sea level will go up and the island will start responding."
Why are the islands growing – and where does the extra material come from? Coral atoll islands are surrounded by coral reefs, which themselves continually grow, because they are formed by sea creatures. Reefs are eroded by waves crashing against them; the resulting coral debris is washed up on the islands – a process often helped by the presence of manmade structures such as causeways between islands.
And one effect of rising global temperatures – an increase in the frequency of hurricanes – could actually go some way to helping low-lying islands. When Tuvalu was hit by Hurricane Bebe in 1972, for instance, 140 hectares of debris washed up on a reef – and increased the area of the main island by 10 per cent.
Some Atoll Islands are growing, some aren't.............but the AGW cult says they will drown..........Again, Nature takes care of itself...................Land grows and adapts................but let us ignore that...............
According to the article the sea level rise their is 2mm a year..............or over the 61 years a 122mm increase if this article is correct.................which would be a rise of 4.8 inches at Atoll................