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Article: Burial of organic carbon in Holocene sediments of the Zhujiang (Pearl River) and Changjiang (Yangtze River) estuaries

TitleBurial of organic carbon in Holocene sediments of the Zhujiang (Pearl River) and Changjiang (Yangtze River) estuaries
Authors
KeywordsChangjiang
Continental shelf
East Asian monsoon
Estuary
Holocene
Organic carbon
Zhujiang
Issue Date2011
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/marchem
Citation
Marine Chemistry, 2011, v. 123 n. 1-4, p. 1-10 How to Cite?
AbstractThe East Asian marginal seas are important sinks of terrigenous materials transported by large rivers. In this study two cores from the Changjiang (Yangtze River) and Zhujiang (Pearl River) estuaries and one core from the inner shelf off of Hong Kong were investigated to examine the burial of organic matter during the postglacial period and its possible links with paleoenvironmental changes. Based on a simple two end-member mixing model, the terrestrial organic matter supplied primarily from the Zhujiang and Changjiang dominates the estuarine areas while marine organic matter contributes more to the inner-mid shelf. The competing contributions of terrestrial and marine organic matter are responsible for the downcore variations of organic elemental compositions. The overall decreasing shifts of total organic carbon concentrations and total organic carbon to total nitrogen ratios in the Zhujiang estuarine sediments since 6.5. kaBP seems to support the notion that depth profiles of organic matter compositions deposited in the Zhujiang Estuary can aid in the reconstruction of monsoon history in the Holocene. Nevertheless, organic matter compositions in the Changjiang Estuary and inner shelf off of southeastern Hong Kong respond in a different and more complex way to freshwater discharges or precipitation changes (monsoon variability) in the catchments, owing to complex controls of deposition and preservation of organic matter in these estuarine and shelf environments. Caution is therefore needed in using organic elemental and isotopic compositions to decipher paleoenvironmental changes in East Asian continental shelves where intense river-sea interactions occur and sedimentary environments change drastically. © 2010 Elsevier B.V.
Persistent Identifierhttp://hdl.handle.net/10722/134398
ISSN
2015 Impact Factor: 3.412
2015 SCImago Journal Rankings: 1.389
ISI Accession Number ID
Funding AgencyGrant Number
Research Grants Council of the Hong KongHKU 7058/069
National Science Foundation of China40676031
40830107
National Basic Research Program of China2007CB815906
Funding Information:

This work was supported by research grants awarded to W. W.-S. Yim by the Research Grants Council of the Hong Kong (project No. HKU 7058/069), and to S. Y. Yang by the National Science Foundation of China (Grant Nos. 40676031, 40830107) and by the National Basic Research Program of China (Grant No. 2007CB815906). The manuscript benefited from comments and suggestions of Philip Meyers, David Burdige and one anonymous reviewer.

References

 

DC FieldValueLanguage
dc.contributor.authorYang, Sen_HK
dc.contributor.authorTang, Men_HK
dc.contributor.authorYim, WWSen_HK
dc.contributor.authorZong, Yen_HK
dc.contributor.authorHuang, Gen_HK
dc.contributor.authorSwitzer, ADen_HK
dc.contributor.authorSaito, Yen_HK
dc.date.accessioned2011-06-17T09:19:28Z-
dc.date.available2011-06-17T09:19:28Z-
dc.date.issued2011en_HK
dc.identifier.citationMarine Chemistry, 2011, v. 123 n. 1-4, p. 1-10en_HK
dc.identifier.issn0304-4203en_HK
dc.identifier.urihttp://hdl.handle.net/10722/134398-
dc.description.abstractThe East Asian marginal seas are important sinks of terrigenous materials transported by large rivers. In this study two cores from the Changjiang (Yangtze River) and Zhujiang (Pearl River) estuaries and one core from the inner shelf off of Hong Kong were investigated to examine the burial of organic matter during the postglacial period and its possible links with paleoenvironmental changes. Based on a simple two end-member mixing model, the terrestrial organic matter supplied primarily from the Zhujiang and Changjiang dominates the estuarine areas while marine organic matter contributes more to the inner-mid shelf. The competing contributions of terrestrial and marine organic matter are responsible for the downcore variations of organic elemental compositions. The overall decreasing shifts of total organic carbon concentrations and total organic carbon to total nitrogen ratios in the Zhujiang estuarine sediments since 6.5. kaBP seems to support the notion that depth profiles of organic matter compositions deposited in the Zhujiang Estuary can aid in the reconstruction of monsoon history in the Holocene. Nevertheless, organic matter compositions in the Changjiang Estuary and inner shelf off of southeastern Hong Kong respond in a different and more complex way to freshwater discharges or precipitation changes (monsoon variability) in the catchments, owing to complex controls of deposition and preservation of organic matter in these estuarine and shelf environments. Caution is therefore needed in using organic elemental and isotopic compositions to decipher paleoenvironmental changes in East Asian continental shelves where intense river-sea interactions occur and sedimentary environments change drastically. © 2010 Elsevier B.V.en_HK
dc.languageengen_US
dc.publisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/marchemen_HK
dc.relation.ispartofMarine Chemistryen_HK
dc.subjectChangjiangen_HK
dc.subjectContinental shelfen_HK
dc.subjectEast Asian monsoonen_HK
dc.subjectEstuaryen_HK
dc.subjectHoloceneen_HK
dc.subjectOrganic carbonen_HK
dc.subjectZhujiangen_HK
dc.titleBurial of organic carbon in Holocene sediments of the Zhujiang (Pearl River) and Changjiang (Yangtze River) estuariesen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0304-4203&volume=123&issue=1-4&spage=1&epage=10&date=2011&atitle=Burial+of+organic+carbon+in+Holocene+sediments+of+the+Zhujiang+(Pearl+River)+and+Changjiang+(Yangtze+River)+estuaries-
dc.identifier.emailYim, WWS: wwsyim@hku.hken_HK
dc.identifier.emailZong, Y: yqzong@hku.hken_HK
dc.identifier.authorityYim, WWS=rp01746en_HK
dc.identifier.authorityZong, Y=rp00846en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.marchem.2010.07.001en_HK
dc.identifier.scopuseid_2-s2.0-78650306749en_HK
dc.identifier.hkuros185807en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-78650306749&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume123en_HK
dc.identifier.issue1-4en_HK
dc.identifier.spage1en_HK
dc.identifier.epage10en_HK
dc.identifier.isiWOS:000286859800001-
dc.publisher.placeNetherlandsen_HK
dc.identifier.scopusauthoridYang, S=7406950130en_HK
dc.identifier.scopusauthoridTang, M=54910890700en_HK
dc.identifier.scopusauthoridYim, WWS=7007024728en_HK
dc.identifier.scopusauthoridZong, Y=7005203454en_HK
dc.identifier.scopusauthoridHuang, G=7403425099en_HK
dc.identifier.scopusauthoridSwitzer, AD=10738884500en_HK
dc.identifier.scopusauthoridSaito, Y=7406266230en_HK
dc.identifier.citeulike7580418-

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