Multiscale monsoon variability during the last two climatic cycles revealed by spectral signals in Chinese loess and speleothem records | |
Li, Y.1; Su, N.2,3; Liang, L.1; Ma, L.1; Yan, Y.1; Sun, Y.1 | |
2015 | |
发表期刊 | CLIMATE OF THE PAST |
ISSN | 1814-9324 |
卷号 | 11期号:8页码:1067-1075 |
文章类型 | Article |
摘要 | The East Asian Monsoon (EAM) exhibits a significant variability on timescales ranging from tectonic to centennial as inferred from loess, speleothem and marine records. However, the relative contributions and plausible driving forces of the monsoon variability at different timescales remain controversial. Here, we spectrally explore time series of loess grain size and speleothem delta O-18 records and decompose the two proxies into intrinsic components using the empirical mode decomposition method. Spectral results of these two proxies display clear glacial and orbital periodicities corresponding to ice volume and solar cycles, and evident millennial signals which are in pace with Heinrich rhythm and Dansgaard-Oeschger (DO) cycles. Five intrinsic components are parsed out from loess grain size and six intrinsic components from speleothem delta O-18 records. Combined signals are correlated further with possible driving factors including the ice volume, insolation and North Atlantic cooling from a linear point of view. The relative contributions of components differ significantly between loess grain size and speleothem delta O-18 records. Coexistence of glacial and orbital components in the loess grain size implies that both ice volume and insolation have distinctive impacts on the winter monsoon variability, in contrast to the predominant precessional impact on the speleothem delta O-18 variability. Moreover, the millennial components are evident in loess grain size and speleothem delta O-18 records with variances of 13 and 17 %, respectively. A comparison of the millennial-scale signals of these two proxies reveals that abrupt changes in the winter and summer monsoons over the last 260 kyr share common features and similar driving forces linked to high-latitude Northern Hemisphere climate. |
WOS标题词 | Science & Technology ; Physical Sciences |
DOI | 10.5194/cp-11-1067-2015 |
关键词[WOS] | East-asian Monsoon ; North-atlantic Oscillation ; Paleoclimatic Time-series ; Millennial-scale ; Summer Monsoon ; Late Pleistocene ; Oxygen Isotopes ; Greenland Ice ; Cave Records ; Grain-size |
收录类别 | SCI |
语种 | 英语 |
WOS研究方向 | Geology ; Meteorology & Atmospheric Sciences |
WOS类目 | Geosciences, Multidisciplinary ; Meteorology & Atmospheric Sciences |
WOS记录号 | WOS:000360642800003 |
出版者 | COPERNICUS GESELLSCHAFT MBH |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://ir.ieecas.cn/handle/361006/9258 |
专题 | 生态环境研究室 |
通讯作者 | Li, Y. |
作者单位 | 1.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710061, Shaanxi, Peoples R China 2.James Cook Univ, Coll Sci Technol & Engn, Cairns, Qld 4870, Australia 3.Shenyang Normal Univ, Sch Math & Syst Sci, Shenyang 110034, Liaoning, Peoples R China |
推荐引用方式 GB/T 7714 | Li, Y.,Su, N.,Liang, L.,et al. Multiscale monsoon variability during the last two climatic cycles revealed by spectral signals in Chinese loess and speleothem records[J]. CLIMATE OF THE PAST,2015,11(8):1067-1075. |
APA | Li, Y.,Su, N.,Liang, L.,Ma, L.,Yan, Y.,&Sun, Y..(2015).Multiscale monsoon variability during the last two climatic cycles revealed by spectral signals in Chinese loess and speleothem records.CLIMATE OF THE PAST,11(8),1067-1075. |
MLA | Li, Y.,et al."Multiscale monsoon variability during the last two climatic cycles revealed by spectral signals in Chinese loess and speleothem records".CLIMATE OF THE PAST 11.8(2015):1067-1075. |
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