Preservation of black carbon in the shelf sediments of the East China Sea
文献类型：期刊论文
| 作者 | Wang XuChen; Li AnChun |
| 刊名 | CHINESE SCIENCE BULLETIN
 |
| 出版日期 | 2007-11-01 |
| 卷号 | 52期号:22页码:3155-3161 |
| 关键词 | Black Carbon Marine Sediment Carbon Cycle Changjiang River Estuary East China Sea |
| ISSN号 | 1001-6538 |
| DOI | 10.1007/s11434-007-0452-1 |
| 文献子类 | Article |
| 英文摘要 | Concentrations and carbon isotopic (C-14, C-13) compositions of black carbon (BC) were measured for three sediment cores collected from the Changjiang River estuary and the shelf of the East China Sea. BC concentrations ranged from 0.02 to 0.14 mg/g (dry weight), and accounted for 5% to 26% of the sedimentary total organic carbon (TOC) pool. Among the three sediment cores collected at each site, sediment from the Changjiang River estuary had relatively high BC contents compared with the sediments from the East China Sea shelf, suggesting that the Changjiang River discharge played an important role in the delivery of BC to the coastal region. Radiocarbon measurements indicate that the ages of BC are in the range of 6910 to 12250 years old B. P. (before present), that is in general, 3700 to 9000 years older than the C-14 ages of TOC in the sediments. These variable radiocarbon ages suggest that the BC preserved in the sediments was derived from the products of both biomass fire and fossil fuel combustion, as well as from ancient rock weathering. Based on an isotopic mass balance model, we calculated that fossil fuel combustion contributed most (60%. 80%) of the BC preserved in these sediments and varied with depth and locations. The deposition and burial of this "slow-cycling" BC in the sediments of the East China Sea shelf represent a significant pool of carbon sink and could greatly influence carbon cycling in the region.; Concentrations and carbon isotopic (C-14, C-13) compositions of black carbon (BC) were measured for three sediment cores collected from the Changjiang River estuary and the shelf of the East China Sea. BC concentrations ranged from 0.02 to 0.14 mg/g (dry weight), and accounted for 5% to 26% of the sedimentary total organic carbon (TOC) pool. Among the three sediment cores collected at each site, sediment from the Changjiang River estuary had relatively high BC contents compared with the sediments from the East China Sea shelf, suggesting that the Changjiang River discharge played an important role in the delivery of BC to the coastal region. Radiocarbon measurements indicate that the ages of BC are in the range of 6910 to 12250 years old B. P. (before present), that is in general, 3700 to 9000 years older than the C-14 ages of TOC in the sediments. These variable radiocarbon ages suggest that the BC preserved in the sediments was derived from the products of both biomass fire and fossil fuel combustion, as well as from ancient rock weathering. Based on an isotopic mass balance model, we calculated that fossil fuel combustion contributed most (60%. 80%) of the BC preserved in these sediments and varied with depth and locations. The deposition and burial of this "slow-cycling" BC in the sediments of the East China Sea shelf represent a significant pool of carbon sink and could greatly influence carbon cycling in the region. |
| 学科主题 | Multidisciplinary Sciences |
| URL标识 | 查看原文 |
| 语种 | 英语 |
| WOS记录号 | WOS:000251018700018 |
| 公开日期 | 2010-12-24 |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/5071]  |
| 专题 | 海洋研究所_海洋地质与环境重点实验室 |
| 作者单位 | 1.Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China 2.Univ Massachusetts, Dept Environm Earth & Ocean Sci, Boston, MA 02120 USA |
| 推荐引用方式 GB/T 7714 | Wang XuChen,Li AnChun. Preservation of black carbon in the shelf sediments of the East China Sea[J]. CHINESE SCIENCE BULLETIN,2007,52(22):3155-3161. |
| APA | Wang XuChen,&Li AnChun.(2007).Preservation of black carbon in the shelf sediments of the East China Sea.CHINESE SCIENCE BULLETIN,52(22),3155-3161. |
| MLA | Wang XuChen,et al."Preservation of black carbon in the shelf sediments of the East China Sea".CHINESE SCIENCE BULLETIN 52.22(2007):3155-3161. |
入库方式： OAI收割
来源：海洋研究所
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