气候变化领域集成服务门户(CCPortal): A high-resolution δ18O record of modern Tridacna gigas bivalve and its paleoenvironmental implications

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DOI	10.1016/j.palaeo.2020.109800
	A high-resolution δ18O record of modern Tridacna gigas bivalve and its paleoenvironmental implications
	Ma X.; Yan H.; Fei H.; Liu C.; Shi G.; Huang E.; Wang Y.; Qu X.; Lian E.; Dang H.
发表日期	2020
ISSN	0031-0182
卷号	554
英文摘要	The lack of monthly-resolved paleoenvironmental records beyond the instrumental era hinders our full understanding of global climate dynamics. Tridacna gigas shells have a large potential to quantitatively document the variability of the ocean surface environment on time scales from daily to interannual in the past, while the applicability of the geochemical proxies of Tridacna gigas needs to be quantitively investigated. Here we establish a chronology for a Tridacna gigas shell from the southern South China Sea (SCS) by identifying daily growth laminae using a laser scanning confocal microscope (LSCM). Our high-resolution Tridacna gigas shell δ18Oshell record throughout 1989–2013 shows a high correlation with changes in local precipitation and the index of El Niño-Southern Oscillations (ENSO) on the interannual time scale. Together with observed sea surface temperature (SST), we calculated seawater δ18O (δ18Osw) and derived sea surface salinity (SSS) change in the southern SCS based on the Tridacna gigas shell δ18O record. Our salinity-budget calculation results suggest that the SSS variability in the southern SCS is predominantly affected by the vertical mixing and sea surface freshwater flux. Our study reveals that the Tridacna gigas shell is an ideal archive for high-resolution and quantitative paleoenvironmental reconstructions in tropical ocean regions, thus providing a new window to explore paleoenvironmental changes on annual and interannual time scales. © 2020 Elsevier B.V.
英文关键词	Daily growth laminae; ENSO; LSCM; Sea surface salinity; South China Sea
语种	英语
scopus关键词	bivalve; chronology; correlation; El Nino-Southern Oscillation; global climate; paleoenvironment; sea surface temperature; seawater; shell; vertical mixing; Pacific Ocean; South China Sea; Bivalvia; Tridacna gigas
来源期刊	Palaeogeography, Palaeoclimatology, Palaeoecology
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/150444
作者单位	State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, 710061, China; CAS Center for Excellence in Quaternary Science and Global Change, Xi'an, 710061, China; State Key Laboratory of Marine Geology, Tongji University, Shanghai, 200092, China; Open Studio for Oceanic-Continental Climate and Environment Changes, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266061, China; Institute of Global Environmental Change, Xi'an Jiaotong University, Xi'an, 710049, China; University of Chinese Academy of Sciences, Beijing, 100049, China; State Key Laboratory for Manufacturing Systems Engineering, Xi'an Jiaotong University, Xi'an, 710049, China
推荐引用方式 GB/T 7714	Ma X.,Yan H.,Fei H.,et al. A high-resolution δ18O record of modern Tridacna gigas bivalve and its paleoenvironmental implications[J],2020,554.
APA	Ma X..,Yan H..,Fei H..,Liu C..,Shi G..,...&Dang H..(2020).A high-resolution δ18O record of modern Tridacna gigas bivalve and its paleoenvironmental implications.Palaeogeography, Palaeoclimatology, Palaeoecology,554.
MLA	Ma X.,et al."A high-resolution δ18O record of modern Tridacna gigas bivalve and its paleoenvironmental implications".Palaeogeography, Palaeoclimatology, Palaeoecology 554(2020).