SCSIO OpenIR  > 热带海洋环境国家重点实验室(LTO)
Testing coral paleothermometers (B/Ca, Mg/Ca, Sr/Ca, U/Ca and delta O-18) under impacts of large riverine runoff
Chen Tianran; Yu Kefu; Zhao Jianxin; Yan Hongqiang; Song Yinxian; Feng Yuexing; Chen Tegu; chentianran@scsio.ac.cn
2015
Source PublicationACTA OCEANOLOGICA SINICA
Volume34Issue:8Pages:20-26
AbstractSea surface temperature (SST) proxies including B/Ca, Mg/Ca, Sr/Ca, U/Ca and delta O-18 were analyzed in the skeleton of a Porites coral collected from the Zhujiang River (Pearl River) Estuary (ZRE). These geochemical proxies are influenced by river runoff and this area of the northern South China Sea is strongly affected by seasonal freshwater floods. We assessed the robustness of each SST proxy through comparison with the local instrumental SST. Coral Sr/Ca shows the highest correlation with SST variations (r (2)=0.59), suggesting Sr/Ca is the most robust SST proxy. In contrast, coral delta O-18 (r (2)=0.46), B/Ca (r (2)=0.43) and U/Ca (r (2)=0.41) ratios were only moderately correlated with SST variations, suggesting that they are disturbed by some other factors in addition to SST. The poor correlation (r (2)=0.27) between SST and Mg/Ca indicates that Mg/Ca in coral skeletons is not a simple function of SST variations. This may ultimately limit the use of Mg/Ca as a coral paleothermometer.
Department[Chen Tianran; Yu Kefu; Yan Hongqiang; Song Yinxian; Chen Tegu] Chinese Acad Sci, South China Sea Inst Oceanol, Key Lab Marginal Sea Geol, Guangzhou 510301, Guangdong, Peoples R China; [Zhao Jianxin; Feng Yuexing] Univ Queensland, Sch Earth Sci, Radiogen Isotope Lab, Brisbane, Qld 4072, Australia ; LTO
KeywordPorites Coral Sst Proxies Coral Paleothermometers Riverine Runoff Zhujiang River (Pearl River) Estuary Northern South China Sea
Subject AreaOceanography
Document Type期刊论文
Identifierhttp://ir.scsio.ac.cn/handle/344004/14939
Collection热带海洋环境国家重点实验室(LTO)
Corresponding Authorchentianran@scsio.ac.cn
Recommended Citation
GB/T 7714
Chen Tianran,Yu Kefu,Zhao Jianxin,et al. Testing coral paleothermometers (B/Ca, Mg/Ca, Sr/Ca, U/Ca and delta O-18) under impacts of large riverine runoff[J]. ACTA OCEANOLOGICA SINICA,2015,34(8):20-26.
APA Chen Tianran.,Yu Kefu.,Zhao Jianxin.,Yan Hongqiang.,Song Yinxian.,...&chentianran@scsio.ac.cn.(2015).Testing coral paleothermometers (B/Ca, Mg/Ca, Sr/Ca, U/Ca and delta O-18) under impacts of large riverine runoff.ACTA OCEANOLOGICA SINICA,34(8),20-26.
MLA Chen Tianran,et al."Testing coral paleothermometers (B/Ca, Mg/Ca, Sr/Ca, U/Ca and delta O-18) under impacts of large riverine runoff".ACTA OCEANOLOGICA SINICA 34.8(2015):20-26.
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