Interactions Between Depositional Regime and Climate Proxies in the Northern South China Sea Since the Last Glacial Maximum

IF 3.2 2区地球科学 Q2 GEOSCIENCES, MULTIDISCIPLINARY

Paleoceanography and Paleoclimatology Pub Date : 2023-03-01 DOI:10.1029/2022PA004591

Xuesong Wang, Yi Zhong, P. Clift, Yingci Feng, David J. Wilson, Stefanie Kaboth‐Bahr, A. Bahr, X. Gong, Debo Zhao, Zhong-rong Chen, Yanan Zhang, Yuhang Tian, Yuxing Liu, Xiaoyu Liu, Jiabo Liu, Wenyue Xia, Huihui Yang, Wei Cao, Qingsong Liu

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引用次数: 2

Abstract

Sedimentary deposits from the northern South China Sea (SCS) can provide important constraints on past changes in ocean currents and the East Asian summer monsoon (EASM) in this region. However, the interpretation of such records spanning the last deglaciation is complicated because sea‐level change may also have influenced the depositional processes and patterns. Here, we present new records of grain size, clay mineralogy, and magnetic mineralogy spanning the past 24 kyr from both shallow and deep‐water sediment cores in the northern SCS. Our multi‐proxy comparison among multiple cores helps constrain the influence of sea‐level change, providing confidence in interpreting the regional climate‐forced signals. After accounting for the influence of sea‐level change, we find that these multi‐proxy records reflect a combination of changes in (a) the strength of the North Pacific Intermediate Water inflow, (b) the EASM strength, and (c) the Kuroshio Current extent. Overall, this study provides new insights into the roles of varying terrestrial weathering and oceanographic processes in controlling the depositional record on the northern SCS margin in response to climate and sea‐level fluctuations.

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末次盛冰期以来南海北部沉积制度与气候指标的相互作用

南海北部的沉积沉积对该地区过去洋流和东亚夏季风的变化具有重要的制约作用。然而，由于海平面变化也可能影响了沉积过程和模式，因此对上一次冰川消退期间的此类记录的解释很复杂。在这里，我们展示了南海北部浅水和深水沉积物岩芯在过去24 kyr中的粒度、粘土矿物学和磁性矿物学的新记录。我们在多个核心之间进行的多代理比较有助于限制海平面变化的影响，为解释区域气候强迫信号提供信心。在考虑了海平面变化的影响后，我们发现这些多代理记录反映了（a）北太平洋中间水流入强度、（b）EASM强度和（c）黑潮范围的变化组合。总的来说，这项研究为不同的陆地风化和海洋学过程在控制南海北部边缘沉积记录以应对气候和海平面波动方面的作用提供了新的见解。

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来源期刊

Paleoceanography and Paleoclimatology Earth and Planetary Sciences-Atmospheric Science

CiteScore

6.20

自引率

11.40%

发文量

107

期刊介绍： Paleoceanography and Paleoclimatology (PALO) publishes papers dealing with records of past environments, biota and climate. Understanding of the Earth system as it was in the past requires the employment of a wide range of approaches including marine and lacustrine sedimentology and speleothems; ice sheet formation and flow; stable isotope, trace element, and organic geochemistry; paleontology and molecular paleontology; evolutionary processes; mineralization in organisms; understanding tree-ring formation; seismic stratigraphy; physical, chemical, and biological oceanography; geochemical, climate and earth system modeling, and many others. The scope of this journal is regional to global, rather than local, and includes studies of any geologic age (Precambrian to Quaternary, including modern analogs). Within this framework, papers on the following topics are to be included: chronology, stratigraphy (where relevant to correlation of paleoceanographic events), paleoreconstructions, paleoceanographic modeling, paleocirculation (deep, intermediate, and shallow), paleoclimatology (e.g., paleowinds and cryosphere history), global sediment and geochemical cycles, anoxia, sea level changes and effects, relations between biotic evolution and paleoceanography, biotic crises, paleobiology (e.g., ecology of “microfossils” used in paleoceanography), techniques and approaches in paleoceanographic inferences, and modern paleoceanographic analogs, and quantitative and integrative analysis of coupled ocean-atmosphere-biosphere processes. Paleoceanographic and Paleoclimate studies enable us to use the past in order to gain information on possible future climatic and biotic developments: the past is the key to the future, just as much and maybe more than the present is the key to the past.