Anomalous Ba/Ca signals associated with low temperature stresses in Porites corals from Daya Bay,northern South China Sea

作     者：Tianran Chen Kefu Yu Shu Li Tegu Chen Qi Shi 

作者机构：Key Laboratory of Marginal Sea Geology South China Sea Institute of Oceanology Chinese Academy of Sciences Guangzhou 510301 China 

出 版 物：《Journal of Environmental Sciences》 (环境科学学报（英文版）)

年 卷 期：2011年第23卷第9期

页      面：1452-1459页

核心收录：

学科分类：080904[工学-电磁场与微波技术] 0709[理学-地质学] 07[理学] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 0810[工学-信息与通信工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 070903[理学-古生物学与地层学(含：古人类学)] 081105[工学-导航、制导与控制] 081001[工学-通信与信息系统] 081002[工学-信号与信息处理] 0825[工学-航空宇航科学与技术] 0811[工学-控制科学与工程] 

基　　金：supported by the "Strategic Priority Research Program" of the Chinese Academy of Sciences (No.XDA05080300) the National Natural Science Foundation of China (No.40830852,41025007,41106054) the National Basic Research Program (973) of China (No.2007CB815905,2010CB950101) the Knowledge Innovation Program of the Chinese Academy of Sciences (No.SQ201009) 

主　　题：Ba/Ca barium Porites coral cold water stress northern South China Sea 

摘      要：Barium to calcium （Ba/Ca） ratio in corals has been considered as a useful geochemical proxy for upwelling,river flood and other oceanic ***,recent studies indicated that additional environmental or biological factors can influence the incorporation of Ba into coral *** this study,Ba/Ca ratios of two Porites corals collected from Daya Bay,northern South China Sea were ***/Ca signals in the two corals were ‘anomalous’ in comparison with Ba behaviors seen in other near-shore corals influenced by upwelling or riverine *** Ba/Ca profiles displayed similar and remarkable patterns characterized by low and randomly fluctuating background signals periodically interrupted by sharp and large synchronous peaks,clearly indicating an environmental *** analysis indicated that the Ba/Ca profiles were not correlated with previously claimed environmental factors such as precipitation,coastal upwelling,anthropogenic activities or phytoplankton blooms in other *** maxima of Ba/Ca appeared to occur in the period of Sr/Ca maxima,coinciding with the winter minimum temperatures,which suggests that the anomalous high Ba/Ca signals were related to winter-time low sea surface *** speculated that the Ba/Ca peaks in corals of the Daya Bay were most likely the results of enrichment of Ba-rich particles in their skeletons when coral polyps retracted under the stresses of anomalous winter low *** this case,Ba/Ca ratio in relatively high-latitude corals can be a potential proxy for tracing the low temperature stress.