气候变化领域集成服务门户(CCPortal): Evaluation of Sedimentary Organic Carbon Reactivity and Burial in the Eastern China Marginal Seas

CCPortal

DOI	10.1029/2021JC017207
	Evaluation of Sedimentary Organic Carbon Reactivity and Burial in the Eastern China Marginal Seas
	Guo J.; Yuan H.; Song J.; Li X.; Duan L.; Li N.; Wang Y.
发表日期	2021
ISSN	21699275
卷号	126 期号:4
英文摘要	Dynamic physicochemical interactions along continental margins create complex organic carbon (OC) cycles that have a significant impact on the global climate but remain enigmatic; in particular, the OC burial behaviors in mud areas are still unclear. Herein, the molecular and bulk properties of sedimentary OC (SOC) were investigated in eastern China marginal seas to better understand the fate of SOC. The source discrimination analysis showed that SOC was mainly derived from indigenous production and experienced strong heterotrophic alteration, as indicated by low glucosamine/galactosamine ratios (<3) and the relatively high contribution of bacterial OC (∼25%). The South Yellow Sea mud area (SYSMA) and East China Sea mud area (ECSMA) both represented hot spots for SOC burial, but the SYSMA exhibited lower SOC reactivity than the ECSMA because of intense degradation in the water column. Although the net particulate OC deposition flux in the ECSMA was approximately 5 times that of the SYSMA, the SOC burial efficiencies (∼35%) of these two areas were similar due to the presence of cold water masses and cyclonic eddies in the SYSMA (which are beneficial for the storage of SOC) and the active remineralization driven by the priming effect and intense physical reworking in the ECSMA. As human disturbance and global climate change intensify, the role of distal mud areas (represented by the SYSMA) in SOC burial may become increasingly prominent, while the SOC burial in inner shelf mobile mud areas (such as the ECSMA) affected by large rivers may be significantly reduced. © 2021. American Geophysical Union. All Rights Reserved.
英文关键词	biomarker; burial; deposit; mud; reactivity; sedimentary organic carbon; source
语种	英语
来源期刊	Journal of Geophysical Research: Oceans
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/186384
作者单位	Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, China; Laboratory for Marine Ecology and Environmental Sciences, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China; University of Chinese Academy of Sciences, Beijing, China; Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao, China; Public Technology Service Center, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, China
推荐引用方式 GB/T 7714	Guo J.,Yuan H.,Song J.,et al. Evaluation of Sedimentary Organic Carbon Reactivity and Burial in the Eastern China Marginal Seas[J],2021,126(4).
APA	Guo J..,Yuan H..,Song J..,Li X..,Duan L..,...&Wang Y..(2021).Evaluation of Sedimentary Organic Carbon Reactivity and Burial in the Eastern China Marginal Seas.Journal of Geophysical Research: Oceans,126(4).
MLA	Guo J.,et al."Evaluation of Sedimentary Organic Carbon Reactivity and Burial in the Eastern China Marginal Seas".Journal of Geophysical Research: Oceans 126.4(2021).