Abstract Reconstruction of paleo relative sea level (RSL) is based on multi-proxy disciplines including archaeology. Saltpans, like fish tanks which are considered a reliable method for acquiring RSL index points, are also anthropogenic intertidal facilities, used continuously in the Mediterranean from early antiquity. The Dalmatian shore contains a large number of preserved and historically dated ancient saltpans, now flooded by the rising sea, providing great potential for past RSL indication. The primary objective of this study is to develop a new holistic approach for producing high quality elevation measurements of the saltpan structures and estimating paleo RSL during the last 2 ka. The study combined aerial photogrammetry of the site, bathymetry acoustics scanning, and underwater archaeological survey of the man-made structures, as well as sampling wood and mortar in situ where available. Evaluation of each site’s RSL and the functional height is based on the same assumptions and interpretations made for fish tanks, using elevation measurements on the top of the separation walls and the bottom of the sluice gates. In all the sites analyzed here, we achieved reliable digital surface models with continuous high-resolution data on the indicative structures with single centimeters level of accuracy. The study finds that during the 5th - 6th centuries, RSL was −92 ± 25 cm, increased to −62 ± 21 cm during the 7th - 11th centuries, and decreased to −104 ± 20 cm in the 14th century. Medieval RSL can be explained either by strong tectonic subsidence post 1300 AD or by fluctuations as observed in the East Mediterranean, which requires validation by further Medieval indicators.

中文翻译：

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盐田作为新的考古海平面代理：来自克罗地亚达尔马提亚的一个测试案例

摘要 古相对海平面（RSL）重建是基于包括考古学在内的多学科学科。盐田，如被认为是获取 RSL 指数点的可靠方法的鱼缸，也是人类活动的潮间带设施，自古以来一直在地中海地区使用。达尔马提亚海岸包含大量保存完好且历史悠久的古代盐田，现在被上升的海浪淹没，为过去的 RSL 指示提供了巨大的潜力。本研究的主要目标是开发一种新的整体方法，用于对盐田结构进行高质量的高程测量，并估算过去 2 ka 期间的古 RSL。该研究结合了现场的航空摄影测量、水深声学扫描和人造结构的水下考古调查，以及在可用的情况下就地取样木材和砂浆。每个站点的 RSL 和功能高度的评估基于对鱼缸所做的相同假设和解释，使用隔离墙顶部和闸门底部的高度测量。在此处分析的所有地点中，我们获得了可靠的数字表面模型，在指示性结构上具有连续的高分辨率数据，精度为 1 厘米。研究发现，5-6世纪RSL为-92±25厘米，7-11世纪增加到-62±21厘米，14世纪减少到-104±20厘米。中世纪的 RSL 可以用公元 1300 年后强烈的构造沉降或东地中海观察到的波动来解释，这需要进一步的中世纪指标验证。