Detection of Strong Precession Cycles from the Late Pliocene Sedimentary Records of Northeastern Tibetan Plateau
文献类型：期刊论文
| 作者 | Su, Qingda4,5; Nie, Junsheng4,6; Luo, Zeng4; Li, Mingsong3; Heermance, Richard7; Garzione, Carmala1,2 |
| 刊名 | GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS
 |
| 出版日期 | 2019-08-01 |
| 卷号 | 20期号:8页码:3901-3912 |
| 关键词 | precession cycles magnetic susceptibility Qaidam Basin orbital climate |
| DOI | 10.1029/2019GC008447 |
| 通讯作者 | Nie, Junsheng(jnie@lzu.edu.cn) |
| 英文摘要 | Recent studies demonstrate that aridification is sensitive to eccentricity forcing based on the northeastern Tibetan Plateau Cenozoic fluvio-lacustrine stratigraphic records. However, it is unknown whether this is a bias associated with the fact that higher frequency periods normally have larger age model uncertainties, which tend to decrease spectral power of higher frequency orbital cycles (precession and obliquity) and enlarge lower frequency ones (eccentricity). Here we detect strong and well-resolved (similar to 23 and similar to 19 kyr) precession cycles in the magnetic susceptibility record of late Pliocene fluvio-lacustrine sediments from the Qaidam Basin, northwestern China. We interpret the magnetic susceptibility as a proxy for the degree of chemical weathering in this region, based on the positive correlation between low-frequency magnetic susceptibility and frequency-dependent magnetic susceptibility. The different responses of magnetic susceptibility and a halite content proxy to orbital forcing suggest that aridification is more sensitive to eccentricity forcing than precipitation, but precipitation is more sensitive to precession forcing. This study indicates that different climatic aspects have different sensitivity to orbital forcing. Furthermore, a comparison of the magnetic susceptibility variations in the western Qaidam Basin and global ice volume proxy records suggests ice volume control of Qaidam Basin precipitation and chemical weathering at million-year timescales. Plain Language Summary The cyclicity of Earth's climate is driven by changes in solar insolation associated with variations in Earth's orbital parameters (precession, obliquity, and eccentricity). It remains unclear how different climate processes respond to different orbital forcing. Here, proxy records of aridification and precipitation from the northeastern Tibetan Plateau suggest that variations in aridification were sensitive to eccentricity forcing, while the precipitation changes were sensitive to precession forcing during the late Pliocene. This study indicates that different climatic systems have different sensitivity to orbital forcing. |
| WOS关键词 | WESTERN QAIDAM BASIN ; CHINESE LOESS ; ENVIRONMENTAL MAGNETISM ; ASIAN MONSOON ; SUSCEPTIBILITY ; UPLIFT ; CYCLOSTRATIGRAPHY ; MAGNETOSTRATIGRAPHY ; STRATIGRAPHY ; CONSTRAINTS |
| 资助项目 | Second Tibetan Plateau Scientific Expedition[2019QZKK0704] ; National Natural Science Foundation of China[41672157] ; National Natural Science Foundation of China[41761144063] ; National Natural Science Foundation of China[41422204] ; Fundamental Research Funds for the Central Universities[lzujbky-2018ot05] ; Fundamental Research Funds for the Central Universities[lzujbky-2017-it84] ; Program of Introducing Talents of Discipline to Universities from China's Ministry of Education[BP2018001] ; State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, CAS[SKLLQG1819] ; U.S. National Science Foundation[1545859] |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000490955300006 |
| 出版者 | AMER GEOPHYSICAL UNION |
| 资助机构 | Second Tibetan Plateau Scientific Expedition ; National Natural Science Foundation of China ; Fundamental Research Funds for the Central Universities ; Program of Introducing Talents of Discipline to Universities from China's Ministry of Education ; State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, CAS ; U.S. National Science Foundation |
| 源URL | [http://ir.ieecas.cn/handle/361006/13303]  |
| 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 | Nie, Junsheng |
| 作者单位 | 1.Univ Rochester, Dept Earth & Environm Sci, Rochester, NY USA 2.Rochester Inst Technol, Dept Environm Sci, Rochester, NY 14623 USA 3.Penn State Univ, Dept Geosci, University Pk, PA 16802 USA 4.Lanzhou Univ, Key Lab Western Chinas Environm Syst, Minist Educ, Coll Earth & Environm Sci, Lanzhou, Gansu, Peoples R China 5.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian, Shaanxi, Peoples R China 6.Chinese Acad Sci, CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing, Peoples R China 7.Calif State Univ Northridge, Dept Geol Sci, Northridge, CA 91330 USA |
| 推荐引用方式 GB/T 7714 | Su, Qingda,Nie, Junsheng,Luo, Zeng,et al. Detection of Strong Precession Cycles from the Late Pliocene Sedimentary Records of Northeastern Tibetan Plateau[J]. GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS,2019,20(8):3901-3912. |
| APA | Su, Qingda,Nie, Junsheng,Luo, Zeng,Li, Mingsong,Heermance, Richard,&Garzione, Carmala.(2019).Detection of Strong Precession Cycles from the Late Pliocene Sedimentary Records of Northeastern Tibetan Plateau.GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS,20(8),3901-3912. |
| MLA | Su, Qingda,et al."Detection of Strong Precession Cycles from the Late Pliocene Sedimentary Records of Northeastern Tibetan Plateau".GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS 20.8(2019):3901-3912. |
入库方式： OAI收割
来源：地球环境研究所
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