IOCAS-IR  > 海洋地质与环境重点实验室
Seasonal variations in dissolved neodymium isotope composition in the Bay of Bengal
Yu, Zhaojie1; Colin, Christophe1; Meynadier, Laure2; Douville, Eric3; Dapoigny, Arnaud3; Reverdin, Gilles4; Wu, Qiong5; Wan, Shiming6,7; Song, Lina8; Xu, Zhaokai6; Bassinot, Frank3
2017-12-01
Source PublicationEARTH AND PLANETARY SCIENCE LETTERS
Volume479Pages:310-321
SubtypeArticle
AbstractConstraining the dissolved neodymium (Nd) cycle in the ocean is paramount for using Nd isotopic composition (epsilon(Nd)) as a tracer to reconstruct deep-sea paleocirculations or continental weathering on different time scales. Dissolved epsilon(Nd) has been measured in seawater samples from six hydrological stations collected along similar to 89 degrees E North-South transect in the Bay of Bengal (BoB) in order to assess the impact of seasonal freshwater and sediment discharges from the continental river systems. Seawater samples collected in this study during June 2012 reveal more radiogenic epsilon(Nd) (a difference of similar to 2 Epsilon units for the upper 2000 m, and similar to 0.5 Epsilon unit below 2000 m) and similar to 3-8 pmol/kg lower Nd concentrations than the reported values of nearby seawater samples collected in November 2008. These observations are most plausibly explained by a seasonal variations in dissolved Nd concentrations and epsilon(Nd) in the BoB, induced by seasonal variations in the freshwater and sediment discharges from the Ganges-Brahmaputra (G-B) river system. However, we cannot entirely exclude the possibility of spatial differences given that the water stations collected in this study are not exactly the same positions collected in November 2008. A two-box model suggests, (1) the particulate Nd inputs from the G-B river system mainly control the seasonal shift of epsilon(Nd) observed in the BoB seawater, and (2) a very rapid Nd exchange exists between lithogenic particles and seawater (at least on the scale of a few months). Seasonal changes in seawater epsilon(Nd) may also occur in other marginal seas and in the outflows of major rivers, and these need to be taken into account when using the epsilon(Nd) proxy in the ocean. (C) 2017 Elsevier B.V. All rights reserved.
KeywordNd Isotopic Composition Nd Cycles Bay Of Bengal Ganges-brahmaputra River System Indian Monsoon
DOI10.1016/j.epsl.2017.09.022
Indexed BySCI
Language英语
WOS IDWOS:000415778600027
Citation statistics
Document Type期刊论文
Identifierhttp://ir.qdio.ac.cn/handle/337002/143037
Collection海洋地质与环境重点实验室
海洋环流与波动重点实验室
Affiliation1.Univ Paris Saclay, Univ Paris Sud, CNRS, Lab GEOsci ParisSud GEOPS,UMR 8148, Batiment 504, F-91405 Orsay, France
2.Univ Paris Diderot, Equipe Geochim & Cosmochim, Inst Phys Globe Paris, UMR 7154,Sorbonne Paris Cite, Paris, France
3.Univ Paris Saclay, Lab Sci Climat & Environm, LSCE IPSL, CEA CNRS UVSQ, F-91191 Gif Sur Yvette, France
4.CNRS IRD Univ Pierre & Marie Curie MNHN, Inst Pierre Simon Laplace, Unite Mixte Rech 7159, LOCEAN Inst, Paris, France
5.Tongji Univ, State Key Lab Marine Geol, Shanghai 200092, Peoples R China
6.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Geol & Environm, Qingdao 266071, Peoples R China
7.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Geol, Qingdao 266061, Peoples R China
8.Chinese Acad Sci, Inst Oceanol, Key Lab Ocean Circulat & Waves, Qingdao 266071, Peoples R China
Recommended Citation
GB/T 7714
Yu, Zhaojie,Colin, Christophe,Meynadier, Laure,et al. Seasonal variations in dissolved neodymium isotope composition in the Bay of Bengal[J]. EARTH AND PLANETARY SCIENCE LETTERS,2017,479:310-321.
APA Yu, Zhaojie.,Colin, Christophe.,Meynadier, Laure.,Douville, Eric.,Dapoigny, Arnaud.,...&Bassinot, Frank.(2017).Seasonal variations in dissolved neodymium isotope composition in the Bay of Bengal.EARTH AND PLANETARY SCIENCE LETTERS,479,310-321.
MLA Yu, Zhaojie,et al."Seasonal variations in dissolved neodymium isotope composition in the Bay of Bengal".EARTH AND PLANETARY SCIENCE LETTERS 479(2017):310-321.
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