A 150-year record of heavy metals in the varved sediments of Lake Bolterskardet, Svalbarl
文献类型：期刊论文
| 作者 | Sun, Qing; Chu, Guoqiang; Liu, Jiaqi; Gao, Denyi |
| 刊名 | ARCTIC ANTARCTIC AND ALPINE RESEARCH
 |
| 出版日期 | 2006-08-01 |
| 卷号 | 38期号:3页码:436-445 |
| ISSN号 | 1523-0430 |
| 文献子类 | Article |
| 英文摘要 | Laminated sediments from Bolterskardet Lake on Svalbard provide a new 150-year record of heavy metals in the Arctic. Independent data of (CS)-C-137 and Pb-210 indicate that these laminations are annually deposited varves. The high sedimentation rate and varved sediments make Lake Bolterskardet a good site for studying history of heavy metal pollution in the region. A suite of heavy metals (Pb, As, Cd, Cu, Cr, Co, Ni, and Sn) were studied. The variations of Cu, Cr, Co, and Ni concentrations show an inverse pattern with the median grain size. It suggests that the particle size has a significant role in the accumulation and enrichment of heavy metals in the sediments. In the concentration profiles of studied heavy metals, only Pb concentrations show a significant increase from the lower parts to the upper parts of the core. Profiles of "total," "lithogenic," and "anthropogenic" Pb flux also show an increasing pattern. Anthropogenic Ph flux varies between 0.1 mu g cm(-2) yr(-1) and 12.3 mu g cm(-2) yr(-1), with a mean value of 2.4 mu g cm(-2) yr(-1). The anthropogenic Pb fluxes were relatively low at around 0.7 mu g cm(-2) yr(-1) prior to 1945, slowly increased after 1945, and reached a sidestep (between 1940s and 1970s) with mean value of 1.8 mu g cm(-2) yr(-1). Second high value period was between 1980s and 1990s with mean value of 5.9 mu g cm(-2) yr(-1). The variation of anthropogenic Pb fluxes before 1970 in Bolterskardet Lake coincides with the sulfate record and Pb concentration data from Greenland snow and ice, and the acidity concentration in the Svalbard ice cores. However, the anthropogenic Pb fluxes during the last two decades show a rapidly increasing trend. This regional pattern may suggest that local source is an important factor for heavy metal contamination in Svalbard, and the complex of long-range transport contaminations for regional and global process. |
| WOS关键词 | RECENT ENVIRONMENTAL-CHANGE ; PROGLACIAL BEAR LAKE ; C-14 YR BP ; DEVON ISLAND ; TEMPORAL TRENDS ; ICE CORES ; ATMOSPHERIC CONTAMINATION ; ANTHROPOGENIC SULFATE ; NORTHERN-HEMISPHERE ; ACCUMULATION RATES |
| WOS研究方向 | Environmental Sciences & Ecology ; Physical Geography |
| 语种 | 英语 |
| 出版者 | INST ARCTIC ALPINE RES |
| WOS记录号 | WOS:000240449600016 |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/67174]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Chu, Guoqiang |
| 作者单位 | 1.Natl Res Ctr Geoanal, Beijing 100037, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China 3.Chinese Acad Sci, Inst Atmospher Phys, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Sun, Qing,Chu, Guoqiang,Liu, Jiaqi,et al. A 150-year record of heavy metals in the varved sediments of Lake Bolterskardet, Svalbarl[J]. ARCTIC ANTARCTIC AND ALPINE RESEARCH,2006,38(3):436-445. |
| APA | Sun, Qing,Chu, Guoqiang,Liu, Jiaqi,&Gao, Denyi.(2006).A 150-year record of heavy metals in the varved sediments of Lake Bolterskardet, Svalbarl.ARCTIC ANTARCTIC AND ALPINE RESEARCH,38(3),436-445. |
| MLA | Sun, Qing,et al."A 150-year record of heavy metals in the varved sediments of Lake Bolterskardet, Svalbarl".ARCTIC ANTARCTIC AND ALPINE RESEARCH 38.3(2006):436-445. |
入库方式： OAI收割
来源：地质与地球物理研究所
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