RADIOCARBON AND STABLE CARBON ISOTOPES OF LABILE AND INERT ORGANIC CARBON IN THE CRITICAL ZONE OBSERVATORY IN ILLINOIS, USA
文献类型：期刊论文
| 作者 | Wang, Hong1,2; Stumpf, Andrew J.1; Kumar, Praveen3 |
| 刊名 | RADIOCARBON
 |
| 出版日期 | 2018-06-01 |
| 卷号 | 60期号:3页码:989-999 |
| ISSN号 | 0033-8222 |
| 关键词 | Carbon CyclIng In Critical Zone Environment Isotopes Radiocarbon Ams Dating |
| DOI | 10.1017/RDC.2018.31 |
| 文献子类 | Article |
| 英文摘要 | We applied the high temperature pyrolysis-combustion technique to partition the total soil organic carbon (SOC) into labile and inert carbon pools for accelerator mass spectrometry radiocarbon (AMS C-14) dating and stable carbon isotope (C-13), SOC, and carbonate carbon (CC) content analyses to examine SOC variability at a Critical Zone Observatory site in Illinois, USA. The AMS C-14 dates of labile and inert carbon in the top 1.55 m overlap except in the Bt horizon. Below 1.55 m the labile carbon is younger by 8000-14,800 years. The SOC content decreases from 3.61% to 0.12% and CC content increases from 0% to 19.16% at this depth. Results indicate that SOC production exceeds its loss in the weathering zone causing a continuous turnover of both SOC pools. A small amount of modern SOC infiltrates into deeper sediment below 1.55 m, making the labile carbon pool much younger. Their difference of AMS C-14 contents, (FC)-C-14, reveals 3-5% more modern carbon in the labile SOC pools except in the Bt horizon, further quantifying that <3-5% modern carbon with potential pollutants is translocated into the unweathered sediments. The C-13 reveals the sources for SOC cycling dynamics in both carbon pools at this site. |
| WOS关键词 | SOIL PROCESSES ; MATTER ; MECHANISMS ; DYNAMICS ; ADSORPTION ; FEEDBACKS ; ECOSYSTEM ; AGE |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| 出版者 | UNIV ARIZONA DEPT GEOSCIENCES |
| WOS记录号 | WOS:000434292700014 |
| 源URL | [http://ir.ieecas.cn/handle/361006/15633]  |
| 专题 | 地球环境研究所_黄土与第四纪地质国家重点实验室（2010~） |
| 通讯作者 | Wang, Hong |
| 作者单位 | 1.Univ Illinois, Prairie Res Inst, Illinois State Geol Survey, Champaign, IL 61820 USA 2.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710061, Shaanxi, Peoples R China 3.Univ Illinois, Dept Civil & Environm Engn, Urbana, IL 61801 USA |
| 推荐引用方式 GB/T 7714 | Wang, Hong,Stumpf, Andrew J.,Kumar, Praveen. RADIOCARBON AND STABLE CARBON ISOTOPES OF LABILE AND INERT ORGANIC CARBON IN THE CRITICAL ZONE OBSERVATORY IN ILLINOIS, USA[J]. RADIOCARBON,2018,60(3):989-999. |
| APA | Wang, Hong,Stumpf, Andrew J.,&Kumar, Praveen.(2018).RADIOCARBON AND STABLE CARBON ISOTOPES OF LABILE AND INERT ORGANIC CARBON IN THE CRITICAL ZONE OBSERVATORY IN ILLINOIS, USA.RADIOCARBON,60(3),989-999. |
| MLA | Wang, Hong,et al."RADIOCARBON AND STABLE CARBON ISOTOPES OF LABILE AND INERT ORGANIC CARBON IN THE CRITICAL ZONE OBSERVATORY IN ILLINOIS, USA".RADIOCARBON 60.3(2018):989-999. |
入库方式： OAI收割
来源：地球环境研究所
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