DOI: 10.1016/j.epsl.2018.04.046
Scopus记录号: 2-s2.0-85046660762
论文题名: Precession and glacial-cycle controls of monsoon precipitation isotope changes over East Asia during the Pleistocene
作者: Huang E. ; Chen Y. ; Schefuß E. ; Steinke S. ; Liu J. ; Tian J. ; Martínez-Méndez G. ; Mohtadi M.
刊名: Earth and Planetary Science Letters
ISSN: 0012821X
出版年: 2018
卷: 494 起始页码: 1
结束页码: 11
语种: 英语
英文关键词: hydroclimate
; monsoon
; plant lipids
; precession
; precipitation isotopes
; South China Sea
Scopus关键词: Atmospheric thermodynamics
; Glacial geology
; Incident solar radiation
; Lipids
; Moisture
; Repair
; hydroclimate
; monsoon
; Plant lipids
; precession
; South China sea
; Isotopes
; atmospheric moisture
; boundary condition
; hydrogen isotope
; isotopic composition
; isotopic fractionation
; lipid
; monsoon
; paleoclimate
; plant
; Pleistocene
; precipitation quality
; speleothem
; Far East
; Pacific Ocean
; South China Sea
英文摘要: Precipitation isotope reconstructions derived from speleothems and plant waxes are important archives for understanding hydroclimate dynamics. Their climatic significance in East Asia, however, remains controversial. Here we present terrestrial plant-wax stable hydrogen isotope (δDwax) records over periods covering the last four interglacials and glacial terminations from sediment cores recovered from the northern South China Sea (SCS) as an archive of regionally-integrated precipitation isotope changes in Southeast China. Combined with previous precipitation isotope reconstructions from China, we find that the SCS δDwax and Southwest-Central China stalagmite δ18O records show relatively enriched and depleted isotopic values, respectively, during interglacial peaks; but relatively similar isotopic variations during most sub-interglacials and glacial periods over the past 430 thousand years. During interglacial peaks, strong summer insolation should have intensified the convection intensity, the isotopic fractionation along moisture trajectories and the seasonality, which are all in favor of causing isotopically-depleted rainfall over the East Asian monsoon regime. These effects in combination with a relatively high proportion of Indian Ocean- versus Pacific-sourced moisture influx should have resulted in strongly depleted precipitation isotopes (stalagmite δ18O) over most parts of China. However, Southeast China should have been affected by a relatively low ratio of Indian Ocean- versus Pacific-sourced moisture influx, which dominated over effects yielding depleted precipitation isotopes and led to enriched precipitation isotopes (δDwax). It is thus concluded that glacial boundary conditions and insolation forcing are the two most important factors for causing regional differences in precipitation isotope compositions over subtropical East Asia on orbital timescales. © 2018 Elsevier B.V.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/109846
Appears in Collections: 影响、适应和脆弱性 气候变化事实与影响
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作者单位: State Key Laboratory of Marine Geology, Tongji University, 1239 Siping Road, Shanghai, 200092, China; MARUM – Center for Marine Environmental Sciences, University of Bremen, Bremen, 28359, Germany; Department of Geological Oceanography, State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen, China
Recommended Citation:
Huang E.,Chen Y.,Schefuß E.,et al. Precession and glacial-cycle controls of monsoon precipitation isotope changes over East Asia during the Pleistocene[J]. Earth and Planetary Science Letters,2018-01-01,494