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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
ISSN1814-9324
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
DOI10.5194/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
被引频次:21[WOS]   [WOS记录]     [WOS相关记录]
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
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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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