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Comparing the role of absolute sea-level rise and vertical tectonic motions in coastal flooding, Torres Islands (Vanuatu) ArchiMer
Ballu, Valerie; Bouin, Marie-noelle; Simeoni, Patricia; Crawford, Wayne C.; Calmant, Stephane; Bore, Jean-michel; Kanas, Tony; Pelletier, Bernard.
Since the late 1990s, rising sea levels around the Torres Islands (north Vanuatu, southwest Pacific) have caused strong local and international concern. In 2002-2004, a village was displaced due to increasing sea incursions, and in 2005 a United Nations Environment Programme press release referred to the displaced village as perhaps the world's first climate change "refugees." We show here that vertical motions of the Torres Islands themselves dominate the apparent sea-level rise observed on the islands. From 1997 to 2009, the absolute sea level rose by 150 +/- 20 mm. But GPS data reveal that the islands subsided by 117 +/- 30 mm over the same time period, almost doubling the apparent gradual sea-level rise. Moreover, large earthquakes that occurred just...
Tipo: Text Palavras-chave: Geodesy; Seismic cycle; Island arcs; Vertical motion.
Ano: 2011 URL: https://archimer.ifremer.fr/doc/00144/25575/23734.pdf
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