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Sediment records of long chain alkyl diols in an upwelling area of the coastal northern South China Sea
Zhu, XW; Jia, GD; Mao, SY; Yan, W; jiagd@tongji.edu.cn
2018
Source PublicationORGANIC GEOCHEMISTRY
Volume121Pages:1-9
AbstractLong chain alkyl diols in sediment cores were studied in the Yuedong Upwelling (YDU) area in the coastal northern South China Sea to investigate whether sea surface temperature (SST) and upwelling intensity over the last few decades can be traced by the diol-derived indices, i.e., the LDI (long chain diol index) as a proxy for SST and the DI-1 and DI-2 (diol index 1 and 2) as proxies for upwelling intensity. The influence of riverine long chain alkyl diols (e.g., 1,13- and 1,15-diols), which may affect LDI-reconstructed SSTs, was largely ruled out based on the comparison between diol distributions in suspended particulate materials in the Pearl River estuary and the core sediments. LDI-derived SSTs in downcore sediments matched well with local annual mean SSTs. The records of DI-2 changed in parallel with the local wind stress and inversely with SST at times of upwelling, suggesting that DI-2 is an effective proxy for upwelling intensity of YDU. The DI-1 showed a generally inverse variation pattern with DI-2, implying a major influence by SST, and it is thus not an applicable upwelling indicator for YDU. A negative relationship of DI-1 and a positive relationship of DI-2 with LDI-derived SST were observed. This occurrence might be attributed to El Nino-Southern Oscillation (ENSO), because the SST and upwelling intensity were largely modulated by ENSO, showing a warm annual mean SST during the years of enhanced El Nino and intensified summer upwelling. (C) 2018 Elsevier Ltd. All rights reserved.
Department[Zhu, Xiaowei; Yan, Wen] Chinese Acad Sci, South China Sea Inst Oceanol, CAS Key Lab Ocean & Marginal Sea Geol, Guangzhou 510301, Guangdong, Peoples R China; [Jia, Guodong] Tongji Univ, State Key Lab Marine Geol, Shanghai 200092, Peoples R China; [Mao, Shengyi] Chinese Acad Sci, Guangzhou Inst Energy Convers, CAS Key Lab Gas Hydrate, Guangzhou 510640, Guangdong, Peoples R China; [Yan, Wen] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Subject AreaGeochemistry & Geophysics
Funding ProjectMSG
Document Type期刊论文
Identifierhttp://ir.scsio.ac.cn/handle/344004/17131
Collection中科院边缘海地质重点实验室
Corresponding Authorjiagd@tongji.edu.cn
Recommended Citation
GB/T 7714
Zhu, XW,Jia, GD,Mao, SY,et al. Sediment records of long chain alkyl diols in an upwelling area of the coastal northern South China Sea[J]. ORGANIC GEOCHEMISTRY,2018,121:1-9.
APA Zhu, XW,Jia, GD,Mao, SY,Yan, W,&jiagd@tongji.edu.cn.(2018).Sediment records of long chain alkyl diols in an upwelling area of the coastal northern South China Sea.ORGANIC GEOCHEMISTRY,121,1-9.
MLA Zhu, XW,et al."Sediment records of long chain alkyl diols in an upwelling area of the coastal northern South China Sea".ORGANIC GEOCHEMISTRY 121(2018):1-9.
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