DOI: 10.1016/j.palaeo.2013.12.010
论文题名: Speleothem based 1000-year high resolution record of Indian monsoon variability during the last deglaciation
作者: Lone M.A. ; Ahmad S.M. ; Dung N.C. ; Shen C.-C. ; Raza W. ; Kumar A.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2014
卷: 395 起始页码: 1
结束页码: 8
语种: 英语
英文关键词: δ18O
; Deglaciation
; Indian summer monsoon
; Southern India
; Speleothem
; Termination 1a
英文摘要: A high resolution record of the Indian summer monsoon (ISM) is generated using a δ18O time series from a stalagmite collected from the Valmiki cave in southern India. This record covers a time span of ~1000years from 15,700 to 14,700yr BP (before 1950AD) with an average sampling resolution of ~5years. High amplitude δ18O variation in this record reflects abrupt changes in ISM activity during the last deglaciation and suggest an age for the onset of Termination 1a (T1a) at ~14,800yr BP in the Indian sub-continent. This record shows evidence for strong changes in tropical climate during the last deglaciation. Coincident variability in VSPM4 δ18O with speleothems from southern China during Termination 1a suggests that these caves reflect fluctuations in ISM activity. The variance in δ18O amplitude reveals significant multidecadal variability in ISM activity. Our record reveals intervals of strong monsoon activity during the later phase of Heinrich event 1 (H1) and shows synchronous multidecadal variability between ISM and East Asian monsoon (EAM). Spectral analysis of δ18O time series in VSPM4 reveals solar forcing and strong ocean-atmospheric circulation control on ISM dynamics during the studied time interval.© 2013 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/69463
Appears in Collections: 过去全球变化的重建
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作者单位: CSIR-National Geophysical Research Institute, Hyderabad 500007, India; High-Precision Mass Spectrometry and Environment Change Laboratory (HISPEC), Department of Geosciences, National Taiwan University, Taipei 10617, Taiwan
Recommended Citation:
Lone M.A.,Ahmad S.M.,Dung N.C.,et al. Speleothem based 1000-year high resolution record of Indian monsoon variability during the last deglaciation[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2014-01-01,395