| An assessment of variations in mercury deposition to Antarctica over the past 34,000 years |
| |
| 引用本文： | 尹雪斌,孙立广,谢周清. An assessment of variations in mercury deposition to Antarctica over the past 34,000 years[J]. 极地研究(英文版), 2003, 14(2) |
| |
| 作者姓名： | 尹雪斌 孙立广 谢周清 |
| |
| 作者单位： | Institute of Polar Environment，University of Science and Technology of China，Hefei 230026，China，Institute of Polar Environment，University of Science and Technology of China，Hefei 230026，China，Institute of Polar Environment，University of Science and Technology of China，Hefei 230026，China |
| |
| 基金项目： | 国家自然科学基金，The Commonweal Science Foundation from Ministry of Science and Technology |
| |
| 摘 要： | We performed a comparison analysis of the variations .in Mercury ( Hg) concentrations and the precipitation proxies ( e. g. , 18 O values and 10 Be concentrations) in the Dome C ice core. The results showed that there were significant correlations between Hg and δ 10O values, 10Be concentrations, indicating that the accumulation rate in Dome C is one of the key factors controlling the variations of Hg concentrations in the past 34 ,000 years, and implying that Hg concentrations in ice core can be used as another reliable proxy of precipitation rate in Antarctica. Based upon the high-resolution δ 18O values, we estimated the variations in mercury deposition flux to Antarctica over the past 34,000 years. The highest mercury deposition flux is about 3. 80 pg cm-2 yr-1 during the Last Glacial Maxium (LGM) as high as 3. 5 times of the mercury deposition flux ( about 1. 08 pg cm -2 yr -1) in Holocene due to the fluctuations in natural mercury emissions such as the oceanic biological emissions.
|
An assessment of variations in mercury deposition to Antarctica over the past 34,000 years |
| |
| Yin Xuebim,Sun Liguang and Xie ZhouqingInstitute of Polar Environment,University of Science and Technology of China,Hefei ,China. An assessment of variations in mercury deposition to Antarctica over the past 34,000 years[J]. Chinese Journal of Polar Science, 2003, 14(2) |
| |
| Authors: | Yin Xuebim Sun Liguang Xie ZhouqingInstitute of Polar Environment University of Science Technology of China Hefei China |
| |
| Affiliation: | Institute of Polar Environment, University of Science and Technology of China, Hefei 230026, China |
| |
| Abstract: | We performed a comparison analysis of the variations in Mercury (Hg)concentrations and the precipitation proxies (e. g. , 18 O values and 10 Be concentrations) in the Dome C ice core. The results showed that there were significant correlations between Hg and δ 18 O values, 10 Be concentrations, indicating that the accumulation rate in Dome C is one of the key factors controlling the variations of Hg concentrations in the past 34,000 years, and implying that Hg concentrations in ice core can be used as another reliable proxy of precipitation rate in Antarctica. Based upon the high-resolution δ 18 O values, we estimated the variations in mercury deposition flux to Antarctica over the past 34,000 years. The highest mercury deposition flux is about 3.80 pg cm -2 yr-1 during the Last Glacial Maxium (LGM) as high as 3.5 times of the mercury deposition flux (about 1.08 pg em-2 yr -1 ) in Holocene due to the fluctuations in natural mercury emissions such as the oceanic biological emissions. |
| |
| Keywords: | mercury deposition flux precipitation rate LGM Holocene Antarctic Dome C ice core. |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
