A pollen-based reconstruction of middle to late holocene precipitation dynamics in Anyang archaeological area, Central Plains, China

IF 1.9 3区地球科学 Q3 GEOGRAPHY, PHYSICAL

Quaternary International Pub Date : 2024-06-04 DOI:10.1016/j.quaint.2024.05.014

Songna Wang , Xiaodong Miao , Zhengchuang Hui , Zijuan Yong , Tianyu Shi

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Abstract

In the context of global warming, the dynamics of East Asian Summer Monsoon (EASM) are of great significance for predicting future climate change. The variations of humidity indicated by various climate proxies in Central China are controversial. This study relies on pollen data retrieved from lacustrine sediment at the Anshang site in Anyang archaeological area, Central Plains of China to quantitatively reconstruct the change in PANN (mean annual precipitation). The results show that the region experienced three distinct dry-wet intervals during the ∼8.54 to ∼3.26 cal ka BP: the earlier portion of the mid-Holocene (∼8.5–∼6.0 cal ka BP) witnessed the higher PANN; the latter portion of the mid-Holocene (∼6.0–∼3.6 cal ka BP) enjoyed the highest PANN of the past ∼8500 years with a noticeable cold and dry event occurred around 4.2 cal ka BP; the late Holocene (∼3.6–∼3.2 cal ka BP) experienced the lower PANN. Periodic analysis on pollen-based precipitation further reveals ∼500-year and ∼800-year cycles, matching well with regional climate records. Our regional comparison suggests that the Central Plains of China shared similar climatic controls with the southern region of China during the ∼8.54 to ∼3.26 cal ka BP. Shifts of Western Pacific Subtropical High (WPSH), driven by the ENSO (El Niño-Southern Oscillation) conditions and SST (Sea Surface Temperatures) in the western tropical Pacific, regulated the positioning of the EASM-related rain-belt during ∼8.54 to ∼3.26 cal ka BP. This study provides more reliable variations of humidity in the Central Plains under the influence of the EASM, which is helpful to predict future climate change.

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基于花粉的中国中原安阳考古区全新世中晚期降水动态重建

在全球变暖的背景下，东亚夏季季候风（EASM）的动态变化对预测未来气候变化具有重要意义。华中地区各种气候代用指标所显示的湿度变化存在争议。本研究利用中国中原安阳考古区安上遗址湖相沉积物中的花粉数据，定量重建了年平均降水量（PANN）的变化。结果表明，在公元前 8.54∼∼3.26 年期间，该地区经历了三个不同的干湿分期：全新世中期早期（公元前 8.5-∼6.0 年）PANN 较高；全新世中期晚期（公元前 6.0-∼3.0 年）PANN 较低；全新世中期晚期（公元前 6.0-∼3.0 年）PANN 较高；全新世中期晚期（公元前 6.0-∼3.0 年）PANN 较低。0-∼3.6 cal ka BP）的 PANN 是过去∼8500 年中最高的，在 4.2 cal ka BP 左右出现了明显的寒冷和干旱事件；全新世晚期（∼3.6-∼3.2 cal ka BP）的 PANN 较低。基于花粉的降水周期分析进一步揭示了 ∼500 年和 ∼800 年的周期，与区域气候记录非常吻合。我们的区域比较表明，在 8.54 ∼ 3.26 cal ka BP 期间，中国中原地区与中国南方地区有着相似的气候控制。受厄尔尼诺-南方涛动（ENSO）和西太平洋海表温度（SST）的影响，西太平洋副热带高纬度（WPSH）的移动调节了公元前8.54～前3.26年与EASM相关的雨带的位置。该研究提供了更可靠的EASM影响下的中原地区湿度变化，有助于预测未来气候变化。

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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.