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Pacific Islands are getting bigger

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Hundreds of Pacific Islands are getting bigger despite global warming

By Paul Homewood

New research says hundreds of islands in the Pacific are growing in land size, even as climate change-related sea level rises threaten the region.

Key points:

  • Coral reef sediment was responsible for the increase in land size
  • Waves sweep up the sediment and deposit it on islands
  • However some islands are becoming smaller due to coastal erosion

Scientists at the University of Auckland found atolls in the Pacific nations of Marshall Islands and Kiribati, as well as the Maldives archipelago in the Indian Ocean, have grown up to 8 per cent in size over the past six decades despite sea level rise.

They say their research could help climate-vulnerable nations adapt to global warming in the future.

The scientists used satellite images of islands as well as on-the-ground analysis to track the changes.

Coastal geomorphologist Dr Paul Kench said coral reef sediment was responsible for building up the islands.

Dr Kench said in areas where coral reefs were healthy, enough sediment was being produced to cause islands to grow.

“The majority of islands in each of those nations has either got larger or stayed very similar in size,” he said.

“So, you know, one of the remarkable takeaways of the work is that these islands are actually quite dynamic in a physical sense.”

Coastal erosion from rising sea level is considered a major threat to many Pacific communities, with some already watching shorelines recede.

Dr Kench said about 10 per cent of islands captured in the study had gotten smaller in size.

He said a better understanding of which islands are growing and which are eroding could help Pacific nations adapt to climate change.

“That gives the island nations some power to think about adaptation strategies, about where do you focus further development, and you would perhaps choose those islands which we can demonstrate are actually growing in size,” he said.

Dr Kench said there was more work to be done in understanding other factors influencing the growth or reduction of Pacific islands.

“So we’re not suggesting here by any stretch of the imagination that islands have nothing to worry about.

“I guess one of the messages from the work that we’re doing is that the outcome and the prognosis for islands is going to vary quite markedly from one site to the other.”

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4 COMMENTS

  1. …..”hundreds of islands in the Pacific are growing in land size”……

    Of course they are. They’re being flattened & the compressed land mass is being pushed outward by the combined weight of the obese PI’s wobbling over them. Another few tonnes of lamb flaps & fatty corned beef together with a few thousand dialysis units is all they need.

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  2. Hank Johnson Congressman and devout Trump hater once reckoned that Guam was getting so overpopulated that he feared it would “tip over and sink”, he wasn’t joking and I’m pretty sure he’s still in Congress making law for the American people to follow and still hating Trump.

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