Interactions between sea-level rise and wave exposure on reef island dynamics in the Solomon Islands
Interactions between sea-level rise and wave exposure on reef island dynamics in the Solomon Islands
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DOI：
10.1088/1748-9326/11/5/054011
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发表时间：
2016-05-01
影响因子：
6.7
通讯作者：
Woodroffe, Colin D.
中科院分区：
文献类型：
--
作者：
Albert, Simon;Leon, Javier X.;Woodroffe, Colin D.
所罗门群岛地势低洼的礁岛为了解未来全球海平面上升的影响提供了一个宝贵的窗口。据预测，海平面上升将造成太平洋中部低洼环礁的广泛侵蚀和淹没。然而，对西太平洋珊瑚礁岛屿的有限研究表明，迄今为止，大多数海岸线变化和淹没是极端事件、海堤和不适当开发造成的，而不仅仅是海平面上升。在这里，我们提出了第一次分析沿海动态从海平面上升热点在所罗门群岛。利用1947年至2014年33个岛屿的时间序列航空和卫星图像，沿着当地知识的历史洞察力，我们确定了五个植被覆盖的珊瑚礁岛屿在这段时间内已经消失，还有六个岛屿经历了严重的海岸线衰退。两个地点的海岸线衰退摧毁了至少自1935年以来就存在的村庄，导致社区搬迁。海岸线后退的速度在受到高波浪能量影响的地区要高得多，这表明海平面上升和波浪之间存在协同作用。了解这些使岛屿更容易遭受海岸侵蚀的当地因素对于指导这些偏远太平洋社区的适应对策至关重要。
Low-lying reef islands in the Solomon Islands provide a valuable window into the future impacts of global sea-level rise. Sea-level rise has been predicted to cause widespread erosion and inundation of low-lying atolls in the central Pacific. However, the limited research on reef islands in the western Pacific indicates the majority of shoreline changes and inundation to date result from extreme events, seawalls and inappropriate development rather than sea-level rise alone. Here, we present the first analysis of coastal dynamics from a sea-level rise hotspot in the Solomon Islands. Using time series aerial and satellite imagery from 1947 to 2014 of 33 islands, along with historical insight from local knowledge, we have identified five vegetated reef islands that have vanished over this time period and a further six islands experiencing severe shoreline recession. Shoreline recession at two sites has destroyed villages that have existed since at least 1935, leading to community relocations. Rates of shoreline recession are substantially higher in areas exposed to high wave energy, indicating a synergistic interaction between sea-level rise and waves. Understanding these local factors that increase the susceptibility of islands to coastal erosion is critical to guide adaptation responses for these remote Pacific communities.