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| RADIOCARBON AND STABLE CARBON ISOTOPES OF LABILE AND INERT ORGANIC CARBON IN THE CRITICAL ZONE OBSERVATORY IN ILLINOIS, USA | |
| Wang, Hong1,2; Stumpf, Andrew J.1; Kumar, Praveen3 | |
| 2018-06-01 | |
| Source Publication | RADIOCARBON
 |
| ISSN | 0033-8222 |
| Volume | 60Issue:3Pages:989-999 |
| Subtype | Article |
| Abstract | 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. |
| Keyword | Carbon CyclIng In Critical Zone Environment Isotopes Radiocarbon Ams Dating |
| WOS Headings | Science & Technology ; Physical Sciences |
| DOI | 10.1017/RDC.2018.31 |
| WOS Keyword | SOIL PROCESSES ; MATTER ; MECHANISMS ; DYNAMICS ; ADSORPTION ; FEEDBACKS ; ECOSYSTEM ; AGE |
| Indexed By | SCI |
| Language | 英语 |
| WOS Research Area | Geochemistry & Geophysics |
| WOS Subject | Geochemistry & Geophysics |
| WOS ID | WOS:000434292700014 |
| Publisher | UNIV ARIZONA DEPT GEOSCIENCES |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.ieecas.cn/handle/361006/15634 |
| Collection | 黄土与第四纪地质国家重点实验室（2010~） |
| Corresponding Author | Wang, Hong |
| Affiliation | 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 |
| Recommended Citation 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. |
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