Chronology and environmental changes from a sediment core spanning the last 485 ka from Lake Acıgöl (SW Anatolia)

IF 1.9 3区地球科学 Q3 GEOGRAPHY, PHYSICAL

Quaternary International Pub Date : 2025-02-27 DOI:10.1016/j.quaint.2025.109710

Hüseyin Çaldırak , Z. Bora Ön , M. Serkan Akkiraz , M. Namık Çağatay , Bassam Ghaleb , Sabine Wulf , K. Kadir Eriş , Dursun Acar , Jérôme Kaiser , Sena Akçer-Ön

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引用次数: 0

Abstract

This study details the construction of an age-depth model for the uppermost 128 m of the 600 m long Acıgöl2009-B03 sediment core, retrieved from the hypersaline Lake Acıgöl in southwestern Anatolia. The model aligns the arboreal pollen record from Acıgöl2009-B03 with the LR04 benthic δ¹⁸O stack marine oxygen isotope record. Initial correlation was achieved using the Dynamic Time Warping algorithm, which was subsequently refined through manual tuning and finalized with Bayesian age-depth modeling to enhance precision and report the associated uncertainty levels. The model's accuracy incorporates multiple chronological constraints, including three radiocarbon dates, three U/Th dates, and the Kos Plateau Tuff, dated at 161.3 ± 0.1 ka. According to this model, the upper 128 m of the Acıgöl2009-B03 sequence spans approximately the last 485,000 years, encompassing Marine Isotope Stages (MIS) 1–12 and part of MIS 13. Our model serves as an update to the previously published, linearly constructed, age model as being used more anchor points and an efficient algorithm for similarity measurements which lies on a robust statistical foundation. In this period, arboreal pollen data suggest increasing (decreasing) arboreal vegetation input during interglacial (glacial) periods.

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Acıgöl湖（西南安纳托利亚）沉积物岩心历时485 ka的年代学和环境变化

本研究详细构建了一个年龄深度模型，该模型取自安纳托利亚西南部Acıgöl高盐湖600 m长的Acıgöl2009-B03沉积物岩心的最上层128 m。该模型将Acıgöl2009-B03的树木花粉记录与LR04底栖生物δ18O堆海洋氧同位素记录进行了比对。使用动态时间扭曲算法实现初始相关性，随后通过手动调优对其进行改进，最后使用贝叶斯年龄深度建模来提高精度并报告相关的不确定性水平。该模型的准确性结合了多种年代限制，包括三个放射性碳年代、三个U/Th年代和科斯高原凝灰岩，其年代为161.3±0.1 ka。根据该模型，Acıgöl2009-B03层序的上部128 m跨度约为485,000年，包括海洋同位素阶段（MIS） 1-12和MIS 13的一部分。我们的模型是对先前发布的线性构建的年龄模型的更新，因为它使用了更多的锚点和有效的相似性测量算法，这是建立在强大的统计基础上的。在这一时期，树木花粉资料表明间冰期树木植被输入增加（减少）。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Quaternary International 地学-地球科学综合

CiteScore

5.60

自引率

4.50%

发文量

336

审稿时长

3 months

期刊介绍： Quaternary International is the official journal of the International Union for Quaternary Research. The objectives are to publish a high quality scientific journal under the auspices of the premier Quaternary association that reflects the interdisciplinary nature of INQUA and records recent advances in Quaternary science that appeal to a wide audience. This series will encompass all the full spectrum of the physical and natural sciences that are commonly employed in solving Quaternary problems. The policy is to publish peer refereed collected research papers from symposia, workshops and meetings sponsored by INQUA. In addition, other organizations may request publication of their collected works pertaining to the Quaternary.