Sedimental pollen records in the northern South China Sea and their paleoenvironmental significance

Bandara, Gayan, Luo, Chuanxiu, Chen, Chixin, Xiang, Rong, Herath, Dileep B., Yang, Zijie and Thilakanayaka, Vidusanka ORCID: (2023) Sedimental pollen records in the northern South China Sea and their paleoenvironmental significance. Journal of Asian Earth Sciences, 241. ISSN 1367-9120

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Studies on the reconstruction of long-term climatic and vegetation dynamics around the northern South China Sea (SCS) are limited. Therefore, this study was conducted to get a clear understanding of the paleoenvironmental significance around the Taiwan Strait in northern SCS. The chronology was based on the accelerator mass spectrometry (AMS) 14C dates of mixed planktonic foraminifera, then we compared and cross-validated the age–depth model based on the grain-size analysis and foraminifera data. Palynomorph data, including percentages and concentrations based on marine sediment cores (WQZK1, WQZK2, and WQZK3), were used to reconstruct the history of vegetation and climate changes and identify the provenance and transport mechanisms of pollen and spores. The findings indicated that fern spores dominated the interglacial period, suggesting intense summer monsoons during warm periods in marine isotope stages (MIS) 5–MIS 1. During MIS 5a, tropical and subtropical conifers with temperate components dominated, indicating the climate was comparatively warm at an increasing sea level. The lowest sea level subtly proved cooler and wetter climate, subsequently affecting a drastic increase of Pinus during MIS 4. Tropical and subtropical conifers dominated during the MIS 3, and the sea level increased comparatively to MIS 4, indicating warmer climate conditions. Pinus pollen and fern spores dominated MIS 1, implying that the paleoenvironment was comparable to the present day. Therefore, this study supports previous studies on the northern SCS region and suggests that a combination of pollen with other proxies provides a better understanding of vegetation and climatic dynamics in the past.

Item Type: Article
Additional Information: Funding Information: This work was funded by the Key Special Project for Introduced Talents Team of Southern Marine Science and Engineering at the Guangdong Laboratory, Guangzhou (Grant Number: GML2019ZD0206), the National Natural Science Foundation of China (Grant Numbers: NSFC 41876062 , 91228207 ), and the Strategic Priority Research Program of the Chinese Academy of Sciences (Grant Number: XDA11030104 ), and the Innovation Development Fund Projects of the Innovation Research Institute of the South China Sea for Ecological and Environmental Engineering, Chinese Academy of Sciences (Grant Number: ISEE2018PY02 ). Publisher Copyright: © 2022 Elsevier Ltd
Uncontrolled Keywords: paleoclimate,paleovegetation,pollen,south china sea,taiwan strait,geology,earth-surface processes,sdg 13 - climate action,sdg 14 - life below water ,/dk/atira/pure/subjectarea/asjc/1900/1907
Faculty \ School: Faculty of Science > School of Environmental Sciences
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Depositing User: LivePure Connector
Date Deposited: 21 Mar 2023 10:30
Last Modified: 28 Nov 2023 02:47
DOI: 10.1016/j.jseaes.2022.105457

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