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L'arcipelago di Tuvalu, una piccola nazione del Pacifico considerata sull'orlo della sparizione a causa del riscaldamento globale, sta in realtà espandendo il suo territorio, secondo un nuovo studio pubblicato venerdì.
L'Università di Auckland ha esaminato i cambiamenti nella geografia dei nove atolli corallini che lo compongono, utilizzando fotografie aeree e immagini satellitari. Durante il periodo tra il 1971 e il 2014, otto atolli e tre quarti delle isole si sono espansi. La superficie terrestre è aumentata del 2,9%, anche se il livello del mare è cresciuto del doppio rispetto alla media mondiale.
Paul Kench, co-autore dello studio pubblicato sulla rivista Nature Communications, contraddice l'idea che le isole basse sarebbero inghiottite dall' innalzamento del livello del mare a causa dei cambiamenti climatici.
Fattori quali l'orientamento delle onde e i sedimenti accumulati durante le tempeste possono compensare l'erosione causata dall'accrescimento del livello delle acque.
AFP/AnP
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