Pacific's Tuvalu expanding, likely to still be habitable in 100 years, despite rising sea levels

The tiny Pacific island nation of Tuvalu, thought to be under threat from sea level rise, has actually expanded in land area over the past 40 years and is likely to continue to be habitable a century from now, scientists say.

Research by the University of Auckland mapped shoreline change of each of Tuvalu's 101 islands across its nine atolls over a 40-year period.

Mapping of island size and position shows that Tuvalu has experienced a net increase in land area of 2.9 per cent or 73.5ha.  Overall 74 per cent of islands in the group - a total of 73 - are larger now than forty years ago.

Yet sea level rise in the region has been happening at twice the global average over the past 40 years.

"We tend to think of Pacific atolls as static landforms that will simply be inundated as sea levels rise but there is growing evidence these islands are geologically dynamic and are constantly changing," said researcher Professor Paul Kench.

Graphic showing changes at (a) Nanumaga reef platform island, (b) Fangaia island, (c) Fenualango island (d) Reef islands Nukulaelae reef rim, (e) Teafuone island. Source: University of Auckland

"The study findings may seem counterintuitive given that sea level has been rising in the region over the past half century, but the dominant mode of change over that time on Tuvalu has been expansion, not erosion," he said.

Professor Kench says sea level is just one factor that can influence island change and a range of environmental processes have contributed to that pattern including sediment supply and wave patterns.

Those processes, particularly during extreme events such as Cyclone Bebe in 1972, could account for the expansion of larger mixed sand-gravel islands and gravel islands, while smaller islands which are predominantly sand are more likely to have been destabilised, he said.

"On the basis of this research we project a markedly different trajectory for Tuvalu's islands over the next century and while we recognise that habitability rests on a number of factors, loss of land is unlikely to be a factor in forcing depopulation of Tuvalu."

Rather than simple re-location or migration, the researchers say new adaptations could be considered that involve the community in decision-making on issues of planning, development goals and land tenure systems that take into account the dynamic nature of islands.

The research team used aerial photos going as far back as 1943, and photo collections from 1971 and 1984 with updated satellite imagery from 2004-2014, to compare how the shoreline of each atoll changed between 1971 and 2014.

The research has just been published in Nature Communications. 



Meet the Kiwi t-shirt designer flying high after Sheldon wore his design on The Big Bang Theory

Sick of his day job at aged 33, Glenn Jones decided to start making t-shirts, now he is the undisputed King of Kiwiana

"T-shirts saved my life. It just gave me this whole new creative release which I really needed," says the graphic artist.

Now he has a claim to fame - he designed a melting Rubik's Cube t-shirt which was worn on the US television show, The Big Bang Theory, viewed by an audience of millions.

"We get an alert every time an order comes in, and literally, we sold thousands of t-shirts after Sheldon (from The Big Bang Theory) wore it for ten seconds in the opening credits."

American pop culture he says, isn't his style. Instead he wants to stick to retro Kiwiana.

"I grew up in the 70s. I grew up beside a diary where you take your bottles back and you get cents for it for a ten cent lolly mixture."

The last four years have proven successful for the Kiwiana business with him and his wife selling over 20,000 prints and now they have moved to tea towels, mugs and fridge magnets.

Glenn Jones' designs have gone global. Tim Wilson caught up with him. Source: Seven Sharp

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Unlikely New Zealand mum and daughter music duo crack the big time in China

A New Zealand mother and daughter singing duo have become hugely popular in China. 

Samantha Toner-Green and her mother Celine Toner can't believe their success either with their lives in China being made up of TV appearances, glittery-glam outfits and audiences of thousands. 

The pair have appeared on television in China to an audience of millions.

"It was televised and streamed to 500 million people.. which is insane to get one's head around," says daughter, Samantha.

They describe their genre as a Celtic-classical crossover and combining that with their Kiwi look, it's worked to their success. 

Celine says: "Because we are coming from New Zealand as well, the whole Kiwi exoticness that comes with that, they just love it."

With the two of them on vocals it leaves dad Barry to be the manager meaning they get to work together as a family

"We do travel as a family and Barry is always with us, when people find out we're traveling as a family - husband, wife and daughter - they always say family family family!'"

On the surface they're just a standard singing duo from New Zealand. Source: Seven Sharp