Half-metre sea-level fluctuations on centennial timescales from mid-Holocene corals of Southeast Asia.
Half-metre sea-level fluctuations on centennial timescales from mid-Holocene corals of Southeast Asia.
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DOI：
10.1038/ncomms14387
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发表时间：
2017-02-10
影响因子：
16.6
通讯作者：
Suwargadi BW
中科院分区：
文献类型：
--
作者：
Meltzner AJ;Switzer AD;Horton BP;Ashe E;Qiu Q;Hill DF;Bradley SL;Kopp RE;Hill EM;Majewski JM;Natawidjaja DH;Suwargadi BW
海平面上升是一个全球性的问题，但要预测未来的变化，我们必须了解相对海平面（RSL）在过去是如何变化的，以及为什么变化，从局部到全球尺度。在东亚和东南亚，全新世RSL的细节知之甚少。在这里，我们提出了两个独立的高分辨率RSL代理记录从勿里洞岛的巽他大陆架。这些记录反映了冰川均衡调整和古潮汐范围的空间变化，但都揭示了6850 - 6500 cal年BP之间的RSL历史，包括两次0.6 m的波动，RSL变化率达到每年13±4 mm（2σ）。沿中国南部海岸沿着的观测，虽然分辨率较低，但显示出与巽他大陆架相似的幅度和时间波动。东南亚记录的一致性，从网站2,600公里，表明记录反映区域变化RSL是前所未有的现代。尽管人们对预期的海平面上升感到关切，但我们对过去相对海平面的了解，包括区域偏离全球平均水平的情况，仍然有限。在这里，作者展示了东南亚三个地点在6850年至6500年BP之间同步0.6米海平面波动的证据。
Sea-level rise is a global problem, yet to forecast future changes, we must understand how and why relative sea level (RSL) varied in the past, on local to global scales. In East and Southeast Asia, details of Holocene RSL are poorly understood. Here we present two independent high-resolution RSL proxy records from Belitung Island on the Sunda Shelf. These records capture spatial variations in glacial isostatic adjustment and paleotidal range, yet both reveal a RSL history between 6850 and 6500 cal years BP that includes two 0.6 m fluctuations, with rates of RSL change reaching 13±4 mm per year (2σ). Observations along the south coast of China, although of a lower resolution, reveal fluctuations similar in amplitude and timing to those on the Sunda Shelf. The consistency of the Southeast Asian records, from sites 2,600 km apart, suggests that the records reflect regional changes in RSL that are unprecedented in modern times. Despite concern over anticipated eustatic sea-level rise, our understanding of past relative sea level, including regional deviations from the global average, is limited. Here, the authors show evidence for synchronous 0.6-m sea-level fluctuations between 6850 and 6500 yr BP at three sites across Southeast Asia.