Comparing the role of absolute sea-level rise and vertical tectonic motions in coastal flooding, Torres Islands (Vanuatu)
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 t...
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Veröffentlicht in: | Proceedings of the National Academy of Sciences - PNAS 2011-08, Vol.108 (32), p.13019-13022 |
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creator | Ballu, Valérie Bouin, Marie-Noëlle Siméoni, Patricia Crawford, Wayne C Calmant, Stephane Boré, Jean-Michel Kanas, Tony Pelletier, Bernard |
description | 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 before and after this period caused several hundreds of mm of sudden vertical motion, generating larger apparent sea-level changes than those observed during the entire intervening period. Our results show that vertical ground motions must be accounted for when evaluating sea-level change hazards in active tectonic regions. These data are needed to help communities and governments understand environmental changes and make the best decisions for their future. |
doi_str_mv | 10.1073/pnas.1102842108 |
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These data are needed to help communities and governments understand environmental changes and make the best decisions for their future.</description><identifier>ISSN: 0027-8424</identifier><identifier>EISSN: 1091-6490</identifier><identifier>DOI: 10.1073/pnas.1102842108</identifier><identifier>PMID: 21795605</identifier><language>eng</language><publisher>United States: National Academy of Sciences</publisher><subject>Climate change ; Comparative analysis ; Earth Sciences ; Earthquakes ; Flooding ; Floods ; Geography ; Global positioning systems ; Islands ; Motion ; Oceans ; Physical Sciences ; Plantations ; Plate tectonics ; refugees ; Satellite Communications ; Sciences of the Universe ; Sea level ; Sea level rise ; Seawater ; Seismic activity ; Social Sciences ; Subduction zones ; Subsidence ; tectonics ; United Nations ; United Nations Environment Programme ; Vanuatu ; Vertical motion ; villages ; Water Movements</subject><ispartof>Proceedings of the National Academy of Sciences - PNAS, 2011-08, Vol.108 (32), p.13019-13022</ispartof><rights>copyright © 1993–2008 National Academy of Sciences of the United States of America</rights><rights>Copyright National Academy of Sciences Aug 9, 2011</rights><rights>Distributed under a Creative Commons Attribution 4.0 International License</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-a645t-79ca39fdcf26882b367f6ef3fb06ca017e11f1844b0765674ffa3533eb9c8fd03</citedby><cites>FETCH-LOGICAL-a645t-79ca39fdcf26882b367f6ef3fb06ca017e11f1844b0765674ffa3533eb9c8fd03</cites><orcidid>0000-0002-0437-6561 ; 0000-0002-3260-1826 ; 0000-0002-7985-4636</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Uhttp://www.pnas.org/content/108/32.cover.gif</thumbnail><linktopdf>$$Uhttps://www.jstor.org/stable/pdf/27979137$$EPDF$$P50$$Gjstor$$H</linktopdf><linktohtml>$$Uhttps://www.jstor.org/stable/27979137$$EHTML$$P50$$Gjstor$$H</linktohtml><link.rule.ids>230,314,723,776,780,799,881,27901,27902,53766,53768,57992,58225</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/21795605$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink><backlink>$$Uhttps://hal.science/hal-00812620$$DView record in HAL$$Hfree_for_read</backlink></links><search><creatorcontrib>Ballu, Valérie</creatorcontrib><creatorcontrib>Bouin, Marie-Noëlle</creatorcontrib><creatorcontrib>Siméoni, Patricia</creatorcontrib><creatorcontrib>Crawford, Wayne C</creatorcontrib><creatorcontrib>Calmant, Stephane</creatorcontrib><creatorcontrib>Boré, Jean-Michel</creatorcontrib><creatorcontrib>Kanas, Tony</creatorcontrib><creatorcontrib>Pelletier, Bernard</creatorcontrib><title>Comparing the role of absolute sea-level rise and vertical tectonic motions in coastal flooding, Torres Islands (Vanuatu)</title><title>Proceedings of the National Academy of Sciences - PNAS</title><addtitle>Proc Natl Acad Sci U S A</addtitle><description>Since the late 1990s, rising sea levels around the Torres Islands (north Vanuatu, southwest Pacific) have caused strong local and international concern. 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subjects | Climate change Comparative analysis Earth Sciences Earthquakes Flooding Floods Geography Global positioning systems Islands Motion Oceans Physical Sciences Plantations Plate tectonics refugees Satellite Communications Sciences of the Universe Sea level Sea level rise Seawater Seismic activity Social Sciences Subduction zones Subsidence tectonics United Nations United Nations Environment Programme Vanuatu Vertical motion villages Water Movements |
title | Comparing the role of absolute sea-level rise and vertical tectonic motions in coastal flooding, Torres Islands (Vanuatu) |
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