DOI: 10.1016/j.quascirev.2013.07.031
Scopus记录号: 2-s2.0-84883039083
论文题名: A 500,000 year record of Indian summer monsoon dynamics recorded by eastern equatorial Indian Ocean upper water-column structure
作者: Bolton C.T. ; Chang L. ; Clemens S.C. ; Kodama K. ; Ikehara M. ; Medina-Elizalde M. ; Paterson G.A. ; Roberts A.P. ; Rohling E.J. ; Yamamoto Y. ; Zhao X.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2013
卷: 77 起始页码: 167
结束页码: 180
语种: 英语
英文关键词: Half-precession
; Indian Ocean
; Millennial
; Monsoon
; Precession
; Stratification
; Wind
Scopus关键词: Half-precession
; Indian ocean
; Millennial
; Monsoon
; Precession
; Atmospheric thermodynamics
; Glacial geology
; Incident solar radiation
; Isotopes
; Thermal stratification
; Wind
; Climate change
; carbon isotope
; climate effect
; foraminifera
; heat transfer
; insolation
; isotopic analysis
; monsoon
; nitrogen isotope
; Northern Hemisphere
; Ocean Drilling Program
; paleoceanography
; paleoclimate
; precession
; stable isotope
; stratification
; summer
; thermocline
; water column
; Arabian Sea
; Indian Ocean
; Indian Ocean (Equatorial)
英文摘要: The Indian Summer Monsoon (ISM) is an inter-hemispheric and highly variable ocean-atmosphere-land interaction that directly affects the densely populated Indian subcontinent. Here, we present new records of palaeoceanographic variability that span the last 500,000 years from the eastern equatorial Indian Ocean, a relatively under-sampled area of ISM influence. We have generated carbon and oxygen stable isotope records from three foraminiferal species from Ocean Drilling Program Site 758 (5°N, 90°E) to investigate the oceanographic history of this region. We interpret our resultant δδ18O (surface-thermocline) record of upper water-column stratification in the context of past ISM variability, and compare orbital phase relationships in our Site 758 data to other climate and monsoon proxies in the region. Results suggest that upper water-column stratification at Site 758, which is dominated by variance at precession and half-precession frequencies (23, 19 and 11ka), is forced by both local (5°N) insolation and ISM winds. In the precession (23ka) band, stratification minima at Site 758 lag northern hemisphere summer insolation maxima (precession minima) by 9ka, which is consistent with Arabian Sea ISM phase estimates and suggests a common wind forcing in both regions. This phase implicates a strong sensitivity to both ice volume and southern hemisphere insolation forcing via latent heat export from the southern subtropical Indian Ocean. Additionally, we find evidence of possible overprinting of millennial-scale events during glacial terminations in our stratification record, which suggests an influence of remote abrupt climate events on ISM dynamics. © 2013 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/60527
Appears in Collections: 过去全球变化的重建
There are no files associated with this item.
作者单位: School of Ocean and Earth Science, National Oceanography Centre, University of Southampton, Southampton SO14 3ZH, United Kingdom; Department of Geological Sciences, Brown University, Providence, RI, United States; Center for Advanced Marine Core Research, Kochi University, Kochi, Japan; Research School of Earth Sciences, The Australian National University, Canberra, ACT 0200, Australia; Centro de Investigación Científica de Yucatán, UCIA, Cancún, Mexico; Key Laboratory of Earth's Deep Interior, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China
Recommended Citation:
Bolton C.T.,Chang L.,Clemens S.C.,et al. A 500,000 year record of Indian summer monsoon dynamics recorded by eastern equatorial Indian Ocean upper water-column structure[J]. Quaternary Science Reviews,2013-01-01,77