High-resolution record of temporal change in organic matter burial over the past similar to 8,600years on the northwestern continental slope of the South China Sea

doi:10.3389/feart.2023.1238920

IOCAS-IR

	High-resolution record of temporal change in organic matter burial over the past similar to 8,600years on the northwestern continental slope of the South China Sea
	Tong, Gang 1,2; Chen, Lilei 3,4; Zhang, Guangxu 5; Liu, Jian 1; Chen, Bin 1; Xu, Gang 1; Liu, Ming 6; An, Yuhui 6; Chen, Duanxin 5
	2023-08-17
发表期刊	FRONTIERS IN EARTH SCIENCE
卷号	11 页码:15
通讯作者	Chen, Lilei(llchen@qnlm.ac) ; Chen, Duanxin(chenduanxin07@qdio.ac.can)
摘要	Sedimentary organic matter (SOM) on continental slopes in marine regions can sensitively record climatic and environmental changes. In this study, total organic carbon content (TOC), total nitrogen content (TN), and their stable isotope compositions (delta C-13 and delta N-15) for sediments of core G02 were investigated (at similar to 24.2-year resolution) to reveal the temporal variations in organic matter sources and the main controls on the sources and distribution of buried organic matter on the northwestern continental slope of the South China Sea over the last similar to 8600 years. Results of a delta C-13 binary mixing model reveal that similar to 82.3 +/- 3% of SOM is derived from marine autochthonous sources. We suggest that the carbon and nitrogen contents and compositions of SOM are governed by distinct factors. The more positive delta N-15 values before the Pulleniatina Minimum Event occurrence are ascribed to stronger subsurface water intrusion by the Kuroshio Current, which led to enhanced subsurface denitrification and in turn counteracted the effect of mixing with surface water caused by the East Asian winter monsoon. Sedimentary delta C-13 values show a fluctuant decrease during ca. 8.6-3.0 cal kyr BP and a conspicuous increase during ca. 3.0-1.4 cal kyr BP. These changes are attributed to the decrease of marine productivity induced by the continuous weakening East Asian monsoon effect and the decrease of terrigenous organic carbon input induced by the weakened Indian summer monsoon precipitation, respectively. Since ca. 1.4 cal kyr BP, human activities have become the dominant factor in controlling the production and distribution of organic carbon. The results provide an important basis for understanding of source-sink processes of organic matter and the factors influencing these processes on continental slopes in low-latitude marginal seas.
关键词	South China Sea continental slope sedimentary organic matter denitrification Asian monsoon changes human activity
DOI	10.3389/feart.2023.1238920
收录类别	SCI
语种	英语
资助项目	This work was financially supported by the National Natural Science Foundation of China (Grant Nos 41906062, 41906066, 42076070, and 42176071), Natural Science Foundation of Shandong Province, China (Grant Nos ZR2020MD069 and ZR2020MD079) and Asia Cooperat[41906066] ; This work was financially supported by the National Natural Science Foundation of China (Grant Nos 41906062, 41906066, 42076070, and 42176071), Natural Science Foundation of Shandong Province, China (Grant Nos ZR2020MD069 and ZR2020MD079) and Asia Cooperat[42076070] ; This work was financially supported by the National Natural Science Foundation of China (Grant Nos 41906062, 41906066, 42076070, and 42176071), Natural Science Foundation of Shandong Province, China (Grant Nos ZR2020MD069 and ZR2020MD079) and Asia Cooperat[42176071] ; This work was financially supported by the National Natural Science Foundation of China (Grant Nos 41906062, 41906066, 42076070, and 42176071), Natural Science Foundation of Shandong Province, China (Grant Nos ZR2020MD069 and ZR2020MD079) and Asia Cooperat[ZR2020MD069] ; National Natural Science Foundation of China[ZR2020MD079] ; Natural Science Foundation of Shandong Province, China ; Asia Cooperation Fund (Comparative Study of Geoenvironment) ; [41906062]
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:001058927200001
出版者	FRONTIERS MEDIA SA
WOS关键词	ASIAN MONSOON ; SHELF SEDIMENTS ; INNER SHELF ; MILLENNIAL-SCALE ; NITROGEN-SOURCES ; WINTER MONSOON ; CLIMATE-CHANGE ; LATE HOLOCENE ; PEARL RIVER ; ARABIAN SEA
引用统计
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/182916
专题	中国科学院海洋研究所
通讯作者	Chen, Lilei; Chen, Duanxin
作者单位	1.Qingdao Inst Marine Geol, CGS, Qingdao, Peoples R China 2.China Univ Geosci, Sch Ocean Sci, Beijing, Peoples R China 3.Deep sea Multidisciplinary Res Ctr, Laoshan Lab, Qingdao, Peoples R China 4.Lab Marine Geol, Laoshan Lab, Qingdao, Peoples R China 5.Chinese Acad Sci, Inst Oceanol, Qingdao, Peoples R China 6.Ocean Univ China, Coll Marine Geosci, Qingdao, Peoples R China
通讯作者单位	中国科学院海洋研究所
推荐引用方式 GB/T 7714	Tong, Gang,Chen, Lilei,Zhang, Guangxu,et al. High-resolution record of temporal change in organic matter burial over the past similar to 8,600years on the northwestern continental slope of the South China Sea[J]. FRONTIERS IN EARTH SCIENCE,2023,11:15.
APA	Tong, Gang.,Chen, Lilei.,Zhang, Guangxu.,Liu, Jian.,Chen, Bin.,...&Chen, Duanxin.(2023).High-resolution record of temporal change in organic matter burial over the past similar to 8,600years on the northwestern continental slope of the South China Sea.FRONTIERS IN EARTH SCIENCE,11,15.
MLA	Tong, Gang,et al."High-resolution record of temporal change in organic matter burial over the past similar to 8,600years on the northwestern continental slope of the South China Sea".FRONTIERS IN EARTH SCIENCE 11(2023):15.