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学科主题: Environmental Sciences ; Geosciences, Multidisciplinary
题名: Environmental controls on coral skeletal delta C-13 in the northern South China Sea
作者: [Deng, Wenfeng ; Wei, Gangjian] Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Isotope Geochem, Guangzhou 510640, Guangdong, Peoples R China ; [Xie, Luhua] Chinese Acad Sci, Guangzhou Inst Geochem, Key Lab Marginal Sea Geol, Guangzhou 510640, Guangdong, Peoples R China ; [Yu, Kefu] Chinese Acad Sci, South China Sea Inst Oceanol, Key Lab Marginal Sea Geol, Guangzhou 510640, Guangdong, Peoples R China
通讯作者: wfdeng@gig.ac.cn ; gjwei@gig.ac.cn
关键词: coral C-13 ; solar insolation ; rainfall ; sea surface temperature ; South China Sea
刊名: JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
发表日期: 2013
卷: 118, 期:4, 页:1359-1368
部门归属: 海洋地质
资助者: The authors would like to thank the Editor Dennis Baldocchi and two anonymous reviewers for their helpful comments and constructive suggestions. Allan Chivas is thanked for his valuable suggestions and discussions. The English of the manuscript was improved by Stallard Scientific Editing. This work was financially supported by the National Basic Research Program of China (2009CB421206, 2013CB956103) and the National Natural Sciences Foundation of China (41173004, 40902050, 40830852). This is contribution IS-1738. from GIGCAS.
摘要: In this paper, we investigate the relationship between seasonal climatic and environmental variables, and the skeletal C-13 of modern and mid-Holocene Porites lutea corals from the southern coast of Hainan Island in the northern South China Sea. No significant correlations were observed between C-13 in the modern coral and solar insolation or sea surface temperature. However, seasonal variability of C-13 in the modern coral covaries with rainfall on Hainan Island. Furthermore, the seasonal variations of C-13 in both the modern and mid-Holocene coral are synchronous with those of the coral O-18, which is a proxy for seawater O-18 and, in turn, largely controlled by local rainfall. These observations suggest that coral C-13 variations are closely associated with rainfall in this region. Given that river runoff contains dissolved inorganic carbon (DIC) with a negative C-13, we suggest that periods of high rainfall on Hainan Island deliver increased amounts of C-13-depleted DIC to coastal seawater, resulting in an enhanced negative C-13 in the corals. Our findings, together with previous studies, appear to demonstrate that in coastal environments, coral skeletal C-13 levels are controlled mainly by terrestrial carbon input and are significantly influenced by terrestrial river runoff. Consequently, the geochemical interpretation of coral C-13 records may differ between coastal areas and offshore areas or the open ocean.
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000329871400002
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内容类型: 期刊论文
URI标识: http://ir.scsio.ac.cn/handle/344004/11092
Appears in Collections:中科院边缘海地质重点实验室_期刊论文

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[Deng, Wenfeng; Wei, Gangjian] Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Isotope Geochem, Guangzhou 510640, Guangdong, Peoples R China; [Xie, Luhua] Chinese Acad Sci, Guangzhou Inst Geochem, Key Lab Marginal Sea Geol, Guangzhou 510640, Guangdong, Peoples R China; [Yu, Kefu] Chinese Acad Sci, South China Sea Inst Oceanol, Key Lab Marginal Sea Geol, Guangzhou 510640, Guangdong, Peoples R China.Environmental controls on coral skeletal delta C-13 in the northern South China Sea,JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES,2013,118(4):1359-1368
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