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A 60-year record of 129I in Taal Lake sediments (Philippines): Influenceof human nuclear activities at low latitude region
Zhang, LY(Zhang, Luyuan)1; Hou, XL(Hou, Xiaolin)1,2; Li, HC(Li, Hongchun)3; Xu, XM(Xu, Xiaomei)4; Hou, Xiaolin
2017-11-23
Source PublicationChemosphere
Volume193Issue:2018Pages:1149-1156
Subtype期刊论文
AbstractThe influence of human nuclear activities on environmental radioactivity is not well known at low latitude regions that are distant from nuclear test sites and nuclear facilities. A sediment core collected from Taal Lake in the central Philippines was analyzed for 129I and 127I to investigate this influence in a low-latitude terrestrial system. A baseline of 129I/127I atomic ratios was established at (2.04e5.14) * 10-12 in the pre-nuclear era in this region. Controlled by the northeasterly equatorial trade winds, increased
129I/127I ratios of (20.1e69.3) * 10-12 suggest that atmospheric nuclear weapons tests at the Pacific Proving Grounds in the central Pacific Ocean was the major source of 129I in the sediment during 1956-1962. The 129I/127I ratios, up to 157.5*10-12 after 1964, indicate a strong influence by European nuclear fuel reprocessing plants. The East Asian Winter Monsoon is found to be the dominant driving force in the atmospheric dispersion of radioactive iodine (129I) from the European nuclear fuel reprocessing plants to Southeast Asia, which is also important for dispersion of other airborne pollutants from the middle-high to low latitude regions. A significant 129I/127I peak at 42.8 cm in the Taal Lake core appears to be the signal of the Chernobyl accident in 1986. In addition, volcanic activities are reflected in the iodine isotope profiles in the sediment core, suggesting the potential of using iodine isotopes as an indicator of volcanic eruptions.
KeywordOdIne-129 In Sediment Taal Lake Human Nuclear Activities Northeasterly Trade Winds East Asian Winter Monsoon Indicator Of Volcanic Activity
DOI10.1016/j.chemosphere.2017.11.134
Indexed BySCI
Language英语
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Cited Times:5[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/5250
Collection加速器质谱中心
Corresponding AuthorHou, Xiaolin
Affiliation1.State Key Laboratory of Loess and Quaternary Geology, Xi'an AMS Center, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, 710061,China
2.Center for Nuclear Technologies, Technical University of Denmark, Risø Campus, Roskilde, 4000, Denmark
3.Department of Geosciences, National Taiwan University, Taipei, 10617, Taiwan
4.Department of Earth System Science, University of California, Irvine, CA 92697, USA
Recommended Citation
GB/T 7714
Zhang, LY,Hou, XL,Li, HC,et al. A 60-year record of 129I in Taal Lake sediments (Philippines): Influenceof human nuclear activities at low latitude region[J]. Chemosphere,2017,193(2018):1149-1156.
APA Zhang, LY,Hou, XL,Li, HC,Xu, XM,&Hou, Xiaolin.(2017).A 60-year record of 129I in Taal Lake sediments (Philippines): Influenceof human nuclear activities at low latitude region.Chemosphere,193(2018),1149-1156.
MLA Zhang, LY,et al."A 60-year record of 129I in Taal Lake sediments (Philippines): Influenceof human nuclear activities at low latitude region".Chemosphere 193.2018(2017):1149-1156.
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