古池湖沉积物生物标志物记录的全新世中晚期气候变化及其与陕北文化演变的关系

IF 3 3区 地球科学 Q2 GEOGRAPHY, PHYSICAL Progress in Physical Geography-Earth and Environment Pub Date : 2023-03-07 DOI:10.1177/03091333231159007
Rui Yang, Aifeng Zhou, Huan Zhang, Lin Chen, Kai Cao, Youliang Huang, Yongxiu Lu, Weimiao Dong
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引用次数: 0

摘要

全新世的气候和环境特征一直备受争议,特别是在全新世中期出现了一个气候最佳期,以及人类文明与环境的相互作用。了解华北毛乌素沙地全新世气候演化对了解陕北文化发展具有重要意义。然而,该地区几乎没有连续的高分辨率湖泊沉积记录。本文选取毛乌素沙地气候敏感区古池湖为研究对象,对该区中全新世以来的气候历史进行了正构烷烃等沉积有机指标的研究。结果表明,8130 ~ 4500 BP期间,区域气候相对温暖湿润,陆生植被以木本植物为主,湖泊营养水平相对稳定。然后气候逐渐变得干旱。然而,在2500 BP开始,有800年的温暖和潮湿条件。进入历史时期,人类活动对环境的影响有所增加。总体而言,古池地区的气候受东亚夏季风对北半球夏季日照变化的响应影响,而北半球夏季日照变化是全新世中期极大期的主要原因。勾池湖的气候记录与陕北地区的文化演变序列的对比显示出明显的关系。有利的气候条件与科技发展、人口增长和文明繁荣有关;而不利的气候条件则与文化停滞或衰退有关。
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Mid and late Holocene climate changes recorded by biomarkers in the sediments of Lake Gouchi and their relationship with the cultural evolution of northern Shaanxi
The climatic and environmental characteristics of the Holocene are much debated, especially the occurrence of a climatic optimum in the mid-Holocene and the interactions between human civilization and the environment. Knowledge of the Holocene climatic evolution of the Mu Us Sandy Land in North China is important for understanding the cultural development of northern Shaanxi. However, few continuous and high-resolution lake sedimentary records are available from the region. We selected Lake Gouchi, a climatically sensitive site in the Mu Us Sandy Land, for a study of sedimentary organic indicators such as n-alkanes, with the objective of reconstructing the regional climatic history since the mid-Holocene. Our results indicate that during 8130–4500 BP, the regional climate was relatively warm and humid, the terrestrial vegetation was dominated by woody plants, and the nutrient level of the lake was relatively stable. Then the climate gradually became arid. However, at the beginning of 2500 BP, there was an 800-year period of warm and humid conditions. Entering the historical period there was an increase in the environmental impacts of human activities. Overall, the climate of the Gouchi area was influenced by the response of the East Asian summer monsoon to changes in Northern Hemisphere summer insolation, which were responsible for the mid-Holocene Maximum. Comparison of the climatic record of Lake Gouchi with the sequence of cultural evolution in northern Shaanxi reveals a distinct relationship. Favorable climatic conditions were associated with technological development, an increasing population, and a flourishing civilization; whereas less favorable climatic conditions were associated with cultural stagnation or decline.
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来源期刊
CiteScore
7.20
自引率
5.10%
发文量
53
审稿时长
>12 weeks
期刊介绍: Progress in Physical Geography is a peer-reviewed, international journal, encompassing an interdisciplinary approach incorporating the latest developments and debates within Physical Geography and interrelated fields across the Earth, Biological and Ecological System Sciences.
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