Downcore variations of carbon reservoir ages linked to lake level changes in northwest China
文献类型：期刊论文
| 作者 | Meng, Bowen1; Zhou, Aifeng2; Zhang, Yancheng1; Song, Mu1; Liu, Weiguo3; Xie, Zhouqing4; Li, Shenghua1; Liu, Zhonghui1 |
| 刊名 | QUATERNARY GEOCHRONOLOGY
 |
| 出版日期 | 2020-10-01 |
| 卷号 | 60页码:8 |
| 关键词 | Radiocarbon dating Carbon reservoir effect Lacustrine sediment Lake status Last two millennia |
| ISSN号 | 1871-1014 |
| DOI | 10.1016/j.quageo.2020.101105 |
| 通讯作者 | Zhang, Yancheng(ychzhang@hku.hk) |
| 英文摘要 | Lacustrine sediments provide an excellent opportunity to study climate change beyond the instrumental period and further to elucidate its intrinsic interactions with ecosystem. However, the radiocarbon (C-14)-based chronological framework of such natural archives, on which robust interpretation of geochemical proxies primarily depends, is commonly challenged due to the difficulty in properly correcting carbon reservoir effect. Here we combine new and existing C-14 dates on total organic carbon (TOC) in two sediment cores from Lake Qinghai and Manas, northwest China, to evaluate the reservoir effect (expressed by reservoir age, RA) over the past similar to 1500 years. Generally, these two cores characterize RA values ranging from similar to 2100 to 4200 and from similar to 350 to 2100 years respectively. Straightforward comparison with paleorecords generated from the same cores indicates a close correlation between RA changes and lake level fluctuations on multi-centennial timescales. Our results suggest that lake level changes (or hydrological variations), which are expected to control the relative input of terrigenous old carbon, merit careful consideration to reduce dating uncertainty. It is essential to select TOC samples across discrete depths, under the control of similar lake status, to allow comparable RAs and, as a result, to establish reliable chronology. |
| WOS关键词 | HOLOCENE MOISTURE EVOLUTION ; QINGHAI LAKE ; LATE PLEISTOCENE ; RADIOCARBON AGE ; ORGANIC-MATTER ; CENTRAL-ASIA ; DAIHAI LAKE ; ICE-AGE ; PLATEAU ; SEDIMENTS |
| 资助项目 | Strategic Priority Research Program of Chinese Academy of Sciences[XDB40000000] ; HK Research Grants Council[17325516] |
| WOS研究方向 | Physical Geography ; Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000571927500003 |
| 出版者 | ELSEVIER SCI LTD |
| 资助机构 | Strategic Priority Research Program of Chinese Academy of Sciences ; HK Research Grants Council |
| 源URL | [http://ir.ieecas.cn/handle/361006/15348]  |
| 专题 | 地球环境研究所_加速器质谱中心 |
| 通讯作者 | Zhang, Yancheng |
| 作者单位 | 1.Univ Hong Kong, Dept Earth Sci, Hong Kong, Peoples R China 2.Lanzhou Univ, Coll Earth & Environm Sci, MOE Key Lab Western Chinas Environm Syst, Lanzhou 730000, Peoples R China 3.Chinese Acad Sci, State Key Lab Loess & Quaternary Geol, Inst Earth Environm, Xian 710061, Peoples R China 4.Univ Sci & Technol China, Sch Earth & Space Sci, Hefei 230026, Peoples R China |
| 推荐引用方式 GB/T 7714 | Meng, Bowen,Zhou, Aifeng,Zhang, Yancheng,et al. Downcore variations of carbon reservoir ages linked to lake level changes in northwest China[J]. QUATERNARY GEOCHRONOLOGY,2020,60:8. |
| APA | Meng, Bowen.,Zhou, Aifeng.,Zhang, Yancheng.,Song, Mu.,Liu, Weiguo.,...&Liu, Zhonghui.(2020).Downcore variations of carbon reservoir ages linked to lake level changes in northwest China.QUATERNARY GEOCHRONOLOGY,60,8. |
| MLA | Meng, Bowen,et al."Downcore variations of carbon reservoir ages linked to lake level changes in northwest China".QUATERNARY GEOCHRONOLOGY 60(2020):8. |
入库方式： OAI收割
来源：地球环境研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。