DOI: 10.1016/j.palaeo.2017.08.037
论文题名: Geochemical fingerprints of climate variation and the extreme La Niña 2010-11 as recorded in a Tridacna squamosa shell from Sulawesi, Indonesia
作者: Arias-Ruiz C. ; Elliot M. ; Bézos A. ; Pedoja K. ; Husson L. ; Cahyarini S.Y. ; Cariou E. ; Michel E. ; La C. ; Manssouri F.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2017
语种: 英语
英文关键词: ENSO anomalies
; Southeast Sulawesi
; Trace elements
; Tridacna squamosa
; δ18O
英文摘要: We used a Tridacna squamosa (Tridacnidae, Bivalvia) shell that lived between 2006 and 2012 to reconstruct environmental conditions in South East Sulawesi (Indonesia). We focused mainly on estimating the influence of temperature and rainfall on the shell geochemistry, as well as ENSO anomalies. Comparison of the measured and theoretical δ18O values show clear seasonal variations and confirms that this species secretes its shell at isotopic equilibrium. The δ18O in T. squamosa shows how the increased rainfall associated with monsoon precipitations in this area influences the δ18O shell signal during the rainy season, the correlation between shell δ18O and SST (r2 =0.62) decrease in warm/wet seasons (SST>28.5°C). Shell Mg/Ca profiles presents better correlation with SST (r2 =0.8) than Sr/Ca profiles (r2 =0.52). Shell Ba/Ca ratio increases during each dry season when primary productivity is maximum. Secondary Ba/Ca peaks also occur during the certain wet seasons and appear associated with abnormal enhanced runoff. Shell δ13C co-varies with primary productivity and salinity, with highest δ13C values occurring during the dry seasons. During 2010-11, abnormal values were detected in all geochemical proxies as result of the strong La Niña event. This calibration study demonstrates the ability of T. squamosa shells to accurately reflect present day environmental processes with seasonal resolutions and to define the local signature of hydrological changes associated with ENSO. © 2017 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/68133
Appears in Collections: 过去全球变化的重建
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作者单位: Laboratoire de Planétologie et Géodynamique UMR 6112, 44300 Nantes, France; CNRS, UMR 6143 M2C, F-14000 Caen, France; ISTerre, Université de Grenoble Alpes, F-38014 Grenoble, France; LSCE/IPSL, Laboratoire CNRS-CEA-UVSQ, 91198 Gif-sur-Yvette, France; Indonesian Institute of Sciences (LIPI), Research Centre for Geotechnology, Sangkuriang, Bandung 40135, Indonesia
Recommended Citation:
Arias-Ruiz C.,Elliot M.,Bézos A.,et al. Geochemical fingerprints of climate variation and the extreme La Niña 2010-11 as recorded in a Tridacna squamosa shell from Sulawesi, Indonesia[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2017-01-01