Soil nitrogen isotopic composition of the Xifeng loess-paleosol sequence and its potential for use as a paleoenvironmental proxy
文献类型：期刊论文
| 作者 | Liu, Junchi1,2; Liu, Weiguo1,3 |
| 刊名 | QUATERNARY INTERNATIONAL
 |
| 出版日期 | 2017-06-08 |
| 卷号 | 440期号:PtA页码:35-41 |
| 关键词 | Nitrogen Isotope Paleoenvironment Loess-paleosol Sequence Glacial-interglacial Cycle Chinese Loess Plateau |
| DOI | 10.1016/j.quaint.2016.04.018 |
| 文献子类 | Article |
| 英文摘要 | The isotopic composition of soil nitrogen (soil delta N-15 values) has been widely used to explore the soil biogeochemical cycle and study land vegetation conditions. However, the delta N-15 values in the loess-paleosol sequence have not been thoroughly studied. In this study, we provide the first report of delta N-15 values from the Xifeng loess-paleosol profile, which spans the last 130 ka. The delta N-15 values show great variation (2.1 parts per thousand-6.1 parts per thousand) in the Xifeng loess sequence. According to these results, the delta N-15 values have a similar pattern with changes in the magnetic susceptibility (MS) and exhibit significant differences within the glacial-interglacial cycle over the last 130 ka. We hypothesize that climate conditions and land vegetation conversion could be reflected by the changes in the delta N-15 values within the glacial-interglacial cycle. (1) The delta N-15 values are positively correlated with the reconstructed mean annual temperature (MAT) and mean annual precipitation (MAP) on the glacial-interglacial time scale. Moreover, it appears that the MAT may be more effective than the MAP for the delta N-15 changes in the Xifeng loess-paleosol sequence. (2) Vegetation changing from grasses to shrubs may cause N-15 depletion during the glacial period. In addition, increasing grass groups may cause N-15 enrichment of the soil during the interglacial stage in the Xifeng loess-paleosol sequence. Because nitrogen is one of the most significant nutrient elements for vegetation, paleovegetation changes may be the main controlling factor for delta N-15 values in the loess-paleosol section. Therefore, delta N-15 values have the potential for use as a proxy in paleoenvironmental reconstructions of the Chinese Loess Plateau. (C) 2016 Elsevier Ltd and INQUA. All rights reserved. |
| WOS关键词 | LAST GLACIAL MAXIMUM ; N-15 NATURAL-ABUNDANCE ; CHINESE LOESS ; ORGANIC-MATTER ; LEAF WAXES ; MONSOON PRECIPITATION ; PEDOGENIC CARBONATE ; PLANT ABUNDANCE ; SOUTHERN CHINA ; NORTHERN CHINA |
| WOS研究方向 | Physical Geography ; Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000404315300004 |
| 源URL | [http://ir.ieecas.cn/handle/361006/5442]  |
| 专题 | 地球环境研究所_加速器质谱中心 |
| 作者单位 | 1.Chinese Acad Sci, IEE, State Key Lab Loess & Quaternary Geol, Xian 710061, Peoples R China 2.Univ Chinese Acad Sci, Beijing, Peoples R China 3.Xi An Jiao Tong Univ, Sch Human Settlement & Civil Engn, Xian 710049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, Junchi,Liu, Weiguo. Soil nitrogen isotopic composition of the Xifeng loess-paleosol sequence and its potential for use as a paleoenvironmental proxy[J]. QUATERNARY INTERNATIONAL,2017,440(PtA):35-41. |
| APA | Liu, Junchi,&Liu, Weiguo.(2017).Soil nitrogen isotopic composition of the Xifeng loess-paleosol sequence and its potential for use as a paleoenvironmental proxy.QUATERNARY INTERNATIONAL,440(PtA),35-41. |
| MLA | Liu, Junchi,et al."Soil nitrogen isotopic composition of the Xifeng loess-paleosol sequence and its potential for use as a paleoenvironmental proxy".QUATERNARY INTERNATIONAL 440.PtA(2017):35-41. |
入库方式： OAI收割
来源：地球环境研究所
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