A high-precision relative sea level (RSL) record over the past 6400 years, reconstructed from fossil coral microatoll colonies, is reported for Natuna Island, Indonesia. The timing of 11 fossil microatolls from four sites on Natuna Island is constrained by replicate ¹⁴C and ²³⁰Th dates. We investigate the local marine reservoir correction (∆R) using the replicate dates. The two sets of dates become aligned if a Marine20 ∆R of −143 ± 176 yr, 1σ (Marine13 ∆R of 15 ± 63 yr) is assigned to the ¹⁴C dates. The distribution of microatoll ages and elevations indicates that RSL was relatively stable from 6400 to 1400 yr BP at 0.2–0.7 ± 0.4 m (2σ) higher than present, before a fall to current levels. A comparison with the predictions of a suite of glacial isostatic adjustment (GIA) models for Southeast Asia suggests refinements are needed in ice-history models to fully capture our RSL data. These new constraints on past RSL of the Sunda Shelf contribute to further calibration of GIA models in the tropics, where RSL data are presently insufficient.

据报道，在印度尼西亚的纳图纳岛，有一个过去6400年的高精度相对海平面（RSL）记录，该记录是从化石珊瑚微礁殖民地重建而成的。来自纳图纳岛四个地点的11个微化石的时间安排受到重复的¹⁴ C和²³⁰ Th日期的限制。我们使用重复日期调查当地的海洋水库修正值（∆R）。如果-143±176年，1σ的Marine20ΔR（15±63岁的Marine13ΔR）被分配给成为对准的两组日期¹⁴C日期。微型滑坡年龄和海拔的分布表明，从6400年到1400年BP，RSL相对稳定，但比目前高0.2-0.7±0.4 m（2σ），然后才下降到当前水平。与针对东南亚的一套冰川均衡调整（GIA）模型的预测结果进行比较后，我们就需要对冰历史模型进行完善，以完全捕获我们的RSL数据。这些对the他架过去的RSL的新限制有助于进一步校准热带地区的GIA模型，因为那里的RSL数据目前不足。