气候变化领域集成服务门户(CCPortal): Shifts in the Distribution and Fate of Sedimentary Polycyclic Aromatic Hydrocarbons Within the Estuarine-Inner Shelf Areas of the East China Sea: Response to Human-Induced Catchment Change

CCPortal

DOI	10.1029/2019JC015773
	Shifts in the Distribution and Fate of Sedimentary Polycyclic Aromatic Hydrocarbons Within the Estuarine-Inner Shelf Areas of the East China Sea: Response to Human-Induced Catchment Change
	Wang C.; Hao Z.; Feng Z.; Zhang C.; Li Y.; Yu W.; Zou X.
发表日期	2020
ISSN	21699275
卷号	125 期号:1
英文摘要	Human-induced changes in river catchments, such as damming, can affect estuarine depositional settings and further affect the transport of sediments and associated pollutants. Polycyclic aromatic hydrocarbons (PAHs) in surface sediments from the East China Sea (ECS) at two time nodes (2006 and 2018) were compared to understand the response of PAHs to human-induced catchment changes. PAH concentrations in the ECS ranged from 8–414 ng g−1 (dry weight), with a mean value of 112 ± 77 ng g−1, relatively low than that in 2006 (38–308 ng g−1, with a mean of 122 ± 60 ng g−1). Sharp decreases in sediment loads have triggered erosion in subaqueous delta and changed the distribution of sediment components, which may eventually influence the distribution pattern of PAHs. The obvious spatial differentiation of PAHs between 2006 and 2018 suggested that the depositional center of PAHs shifted from the estuary to the inner shelf area. PAH deposition patterns in the ECS were primarily influenced by riverine input before 2006 but are now dominated by winnowing processes related to long-distance transport due to sharply decreased sediment loads. Dam construction in the river catchment intercepted large amounts of sediments and PAHs, shifting the Changjiang-derived PAH depositional center from the ocean to reservoirs. Overall, depositional patterns of PAHs in the ECS were largely altered by human-induced catchment changes, which may cause significant impacts on the region's biogeochemical cycles and ecosystem health. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	catchment changes; East China Sea; human activity; Polycyclic aromatic hydrocarbons; sediment grain-size
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/187017
作者单位	School of Geography and Ocean Science, Ministry of Education Key Laboratory for Coast and Island Development, Nanjing University, Nanjing, China; Key Laboratory of Engineering Oceanography, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou, China; Collaborative Innovation Center of South China Sea Studies, Nanjing University, Nanjing, China; Marine Fisheries Research Institute of Jiangsu Province, Nantong, China
推荐引用方式 GB/T 7714	Wang C.,Hao Z.,Feng Z.,et al. Shifts in the Distribution and Fate of Sedimentary Polycyclic Aromatic Hydrocarbons Within the Estuarine-Inner Shelf Areas of the East China Sea: Response to Human-Induced Catchment Change[J],2020,125(1).
APA	Wang C..,Hao Z..,Feng Z..,Zhang C..,Li Y..,...&Zou X..(2020).Shifts in the Distribution and Fate of Sedimentary Polycyclic Aromatic Hydrocarbons Within the Estuarine-Inner Shelf Areas of the East China Sea: Response to Human-Induced Catchment Change.Journal of Geophysical Research: Oceans,125(1).
MLA	Wang C.,et al."Shifts in the Distribution and Fate of Sedimentary Polycyclic Aromatic Hydrocarbons Within the Estuarine-Inner Shelf Areas of the East China Sea: Response to Human-Induced Catchment Change".Journal of Geophysical Research: Oceans 125.1(2020).