DOI: 10.1016/j.quascirev.2017.02.009
Scopus记录号: 2-s2.0-85012181545
论文题名: Climatic variability in Mfabeni peatlands (South Africa) since the late Pleistocene
作者: Baker A. ; Pedentchouk N. ; Routh J. ; Roychoudhury A.N.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2017
卷: 160 起始页码: 57
结束页码: 66
语种: 英语
英文关键词: Continental biomarkers
; Holocene
; Paleoclimatology
; Peatland
; Pleistocene
; Southern Africa
; Stable isotopes
Scopus关键词: Atmospheric temperature
; Isotopes
; Oceanography
; Stratigraphy
; Surface waters
; Holocenes
; Paleoclimatology
; Peatland
; Pleistocene
; Southern Africa
; Stable isotopes
; Wetlands
; biomarker
; climate forcing
; deglaciation
; global climate
; growing season
; Holocene
; Last Glacial Maximum
; Northern Hemisphere
; overprinting
; paleoclimate
; paleoenvironment
; palynology
; peatland
; sea surface temperature
; Southern Hemisphere
; stable isotope
; Younger Dryas
; Indian Ocean
; South Africa
英文摘要: It has been postulated that a bipolar seesaw interhemispheric mechanism dominated the relationship between the Northern and Southern hemisphere climates since the late Pleistocene. A key test for this proposition would be to undertake palaeoenvironmental studies on terrestrial archives in climatically sensitive regions. Southern Africa's contemporary C3 and C4 terrestrial plant distributions display a definitive geographical pattern dictated by different growing season rainfall and temperature zones; however, the region is generally archive poor due to its overall semi-arid climate and high relief topography. The Mfabeni peatland, with a basal age of c. 47 k yrs calibrated before present (kcal yr BP), is one of the oldest continuous coastal peat deposits in Southern Africa. Molecular leaf wax isotopes (δ13Cwax) were generated for a 810 cm long core, and combined with previously published bulk geochemical (δ13Cbulk, %TOC), palynological, and stratigraphic data, to reconstruct the late Pleistocene and Holocene palaeoenvironments. We interpreted environmental shifts associated with the Heinrich 4, Last Glacial Maximum, deglacial and Holocene periods, which are consistent with adjacent Indian Ocean sea surface temperature records. However, the other shorter climate perturbations during the Heinrich 5, 3, 2, 1, Antarctic cold reversal and Younger Dryas, were muted, most likely due to local hydrological overprinting on the Mfabeni record. A general anti-phase sequence was observed between the Mfabeni record and better established Northern Hemisphere events, underpinning the bipolar seesaw interhemispheric mechanism proposed for global climate forcing since the Late Pleistocene. © 2017 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/59293
Appears in Collections: 过去全球变化的重建
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作者单位: Department of Earth Sciences, Stellenbosch University, Stellenbosch, South Africa; School of Environmental Sciences, University of East Anglia, Norwich, United Kingdom; Department of Thematic Studies – Environmental Change, Linköping University, Linköping, Sweden
Recommended Citation:
Baker A.,Pedentchouk N.,Routh J.,et al. Climatic variability in Mfabeni peatlands (South Africa) since the late Pleistocene[J]. Quaternary Science Reviews,2017-01-01,160