DOI: 10.1016/j.palaeo.2019.109518
论文题名: High-resolution record of Holocene climate change dynamics from southern Africa's temperate-tropical boundary, Baviaanskloof, South Africa
作者: Chase B.M. ; Boom A. ; Carr A.S. ; Quick L.J. ; Reimer P.J.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 310182
出版年: 2020
卷: 539 语种: 英语
英文关键词: Holocene
; Palaeoclimate
; Rock hyrax middens
; South Africa
; Stable isotopes
Scopus关键词: climate change
; climatic region
; historical record
; Holocene
; hydrometeorology
; paleoclimate
; paleoenvironment
; paleotemperature
; reconstruction
; regional climate
; sea ice
; sea surface temperature
; stable isotope
; temperate environment
; tropical environment
; westerly
; Cape Province
; Eastern Cape
; South Africa
; Southern Ocean
; Procavia capensis
英文摘要: South Africa's southern Cape is a highly dynamic climatic region that is influenced by changes in both temperate and tropical atmospheric and oceanic circulation dynamics. Recent research initiatives suggest that the major elements of the regional climate system have acted both independently and in combination to establish a mosaic of distinct climate regions and potentially steep climate response gradients across the southern Cape. To consider this further, we present new high resolution δ13C and δ15N data from a rock hyrax (Procavia capensis) midden from Baviaanskloof, in the Cape Fold Mountains of South Africa's Eastern Cape Province. Spanning the last 7200 years, these data provide detailed information regarding environmental changes in the mid- and late Holocene, allowing us to assess the spatio-temporal nature of climate change anomalies across the wider region. Throughout the full duration of the record, a negative correlation between humidity and palaeotemperature reconstructions from nearby Cango Cave is observed. In conjunction with correlations with Southern Ocean sea-surface temperatures and sea-ice presence, we infer a dominant influence of the southern westerlies in determining multi-millennial scale hydroclimate variability. At shorter, multi-centennial to millennial timescales, the Baviaanskloof data indicate a clearer expression of tropical influences, highlighting a delicate balance between the mechanisms driving regional climate dynamics across timescales, and the sensitivity of the region to changes in global boundary conditions. © 2019 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/159523
Appears in Collections: 气候变化与战略
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作者单位: Institut des Sciences de l'Evolution-Montpellier (ISEM), University of Montpellier, Centre National de la Recherche Scientifique (CNRS), EPHE, IRD, Montpellier, France; School of Geography, Geology and the Environment, University of Leicester, Leicester, LE1 7RH, United Kingdom; African Centre for Coastal Palaeoscience, Nelson Mandela University, Port Elizabeth, Eastern Cape 6031, South Africa; School of Natural and Built Environment, Queen's University Belfast, Belfast, Northern Ireland BT7 1NN, United Kingdom
Recommended Citation:
Chase B.M.,Boom A.,Carr A.S.,et al. High-resolution record of Holocene climate change dynamics from southern Africa's temperate-tropical boundary, Baviaanskloof, South Africa[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2020-01-01,539