| Isotopic signatures for natural versus anthropogenic Pb in high-altitude Mt. Everest ice cores during the past 800 years | |
| Lee, Khanghyun2; Do Hur, Soon2; Hou, Shugui3,4; Burn-Nunes, Laurie J.5; Hong, Sungmin1; Barbante, Carlo6,7; Boutron, Claude F.8,9; Rosman, Kevin J. R. | |
| 刊名 | SCIENCE OF THE TOTAL ENVIRONMENT
 |
| 2011-12-15 | |
| 卷号 | 412页码:194-202 |
| 关键词 | Pb isotopes Ice cores Mt. Everest Anthropogenic Pb contamination Leaded gasoline South Asia |
| ISSN号 | 0048-9697 |
| DOI | 10.1016/j.scitotenv.2011.10.002 |
| 通讯作者 | Hong, Sungmin(smhong@inha.ac.kr) |
| 英文摘要 | A long-term record, extending back 800 years (1205 to 2002 AD), of the Pb isotopic composition ((206)Pb/(207)Pb and (208)Pb/(207)Pb) as well as Pb concentrations from high altitude Mt. Everest ice cores has the potential to identify sources and source regions affecting natural and anthropogenic Pb deposition in central Asia. The results show that the regional natural background Pb isotope signature (similar to 120 for (206)Pb/(207)Pb and similar to 2.50 for (208)Pb/(207)Pb) in the central Himalayas was dominated by mineral dust over the last similar to 750 years from 1205 to 1960s. mostly originating from local sources with occasional contributions of long-range transported dust probably from Sahara desert and northwestern India. Since the 1970s, the Pb isotope ratios are characterized by a continuous decline toward less radiogenic ratios with the least mean ratios of 1.178 for (206)Pb/(207)Pb and 2.471 for (208)Pb/(207)Pb in the period 1990-1996. The depression of the (206)Pb/(207)Pb and (208)Pb/(207)Pb values during the corresponding periods is most likely due to an increasing influence of less radiogenic Pb of anthropogenic origin mainly from leaded gasoline used in South Asia (India as well as possibly Bangladesh and Nepal). From 1997 to 2002, isotopic composition tends to show a shift to slightly more radiogenic signature. This is likely attributed to reducing Pb emissions from leaded gasoline in source regions, coinciding with the nationwide reduction of Pb in gasoline and subsequent phase-out of leaded gasoline in South Asia since 1997. An interesting feature is the relatively high levels of Pb concentrations and enrichment factors (EF) between 1997 and 2002. Although the reason for this feature remains uncertain, it would be probably linked with an increasing influence of anthropogenic Pb emitted from other sources such as fossil fuel combustion and non-ferrous metal production. (C) 2011 Elsevier B.V. All rights reserved. |
| 收录类别 | SCI |
| WOS关键词 | LEAD ISOTOPES ; ATMOSPHERIC-POLLUTION ; NORTHERN-HEMISPHERE ; QOMOLANGMA EVEREST ; MASS-SPECTROMETRY ; TIBETAN PLATEAU ; GREENLAND SNOWS ; HEAVY-METALS ; CENTRAL-ASIA ; LATE 1960S |
| WOS研究方向 | Environmental Sciences & Ecology |
| WOS类目 | Environmental Sciences |
| 语种 | 英语 |
| 出版者 | ELSEVIER SCIENCE BV |
| WOS记录号 | WOS:000298534300023 |
| 内容类型 | 期刊论文 |
| URI标识 | http://www.corc.org.cn/handle/1471x/2556564 |
| 专题 | 寒区旱区环境与工程研究所 |
| 通讯作者 | Hong, Sungmin |
| 作者单位 | 1.Inha Univ, Dept Ocean Sci, Inchon 402751, South Korea 2.Korea Polar Res Inst, Inchon 406840, South Korea 3.Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, State Key Lab Cryospher Sci, Lanzhou 730000, Peoples R China 4.Nanjing Univ, Sch Geog & Oceanog Sci, Nanjing 210093, Peoples R China 5.Curtin Univ Technol, Dept Imaging & Appl Phys, Perth, WA 6845, Australia 6.Univ CaFoscari Venice, Dept Environm Sci, I-30123 Venice, Italy 7.Univ CaFoscari Venice, CNR, Inst Dynam Environm Proc, I-30123 Venice, Italy 8.Univ Grenoble 1, CNRS, UMR 5183, Lab Glaciol & Geophys Environm, F-38402 St Martin Dheres, France 9.Univ Grenoble 1, Inst Univ France, Unite Format & Rech Phys Ingn Terre Environm Meca, F-38041 Grenoble 9, France |
| 推荐引用方式 GB/T 7714 | Lee, Khanghyun,Do Hur, Soon,Hou, Shugui,et al. Isotopic signatures for natural versus anthropogenic Pb in high-altitude Mt. Everest ice cores during the past 800 years[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2011,412:194-202. |
| APA | Lee, Khanghyun.,Do Hur, Soon.,Hou, Shugui.,Burn-Nunes, Laurie J..,Hong, Sungmin.,...&Rosman, Kevin J. R..(2011).Isotopic signatures for natural versus anthropogenic Pb in high-altitude Mt. Everest ice cores during the past 800 years.SCIENCE OF THE TOTAL ENVIRONMENT,412,194-202. |
| MLA | Lee, Khanghyun,et al."Isotopic signatures for natural versus anthropogenic Pb in high-altitude Mt. Everest ice cores during the past 800 years".SCIENCE OF THE TOTAL ENVIRONMENT 412(2011):194-202. |
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