DOI: 10.1016/j.quascirev.2013.08.001
Scopus记录号: 2-s2.0-84884710039
论文题名: Central southern Africa at the time of the African Humid Period: A new analysis of Holocene palaeoenvironmental and palaeoclimate data
作者: Burrough S.L. ; Thomas D.S.G.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2013
卷: 80 起始页码: 29
结束页码: 46
语种: 英语
英文关键词: African Humid Period
; CAB
; Central southern Africa
; Holocene
; ITCZ
; Kalahari
Scopus关键词: CAB
; Central southern Africa
; Holocenes
; Humid periods
; ITCZ
; Kalahari
; Geology
; Natural sciences
; aridity
; climate effect
; climate variation
; environmental response
; Holocene
; humid environment
; paleoclimate
; regional pattern
; Central Africa
英文摘要: The Holocene African Humid Period (c 14.8-5.5ka) is now recognised in high-resolution records from western Africa as well as in tropical Africa north of the equator. Establishing a clear picture of Late Quaternary, including Holocene, environmental changes in central southern Africa is proving both difficult and contentious. This is because in dryland systems in particular it can be difficult to distinguish the effects of sub-millennial scale regional climatic variability from those of major externally-forced global climate changes, and because it is essential to distinguish records of environmental drivers from those of environmental responses. We analyse and review existing records for central southern Africa, and neighbouring areas affected by the same climate systems, to understand the primary controls of regional hydrological systems during the Holocene. We then present new data from Makgadikgadi basin barchan dunes that indicate mid-late Holocene aridity following a period of marked hydrological dynamism extending from the early Holocene. We suggest that present-day conditions in central southern Africa are relatively stable compared to the early and mid-Holocene and infer that this period of relative stability in the landscape has occurred since ca 2ka. We explain Holocene hydrological changes through analysis of changing zonal climatic influences linked to Congo Air Boundary (CAB) and Intertropical Convergence Zone (ITCZ) dynamics, the effects of which filter into the region via complex drainage basin dynamics. It is proposed that, s. ensu stricto, the AHP was not a spatially uniform feature of early Holocene central southern Africa. © 2013 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/60458
Appears in Collections: 过去全球变化的重建
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作者单位: School of Geography and Environment, University of Oxford, South Parks Road, Oxford OX1 3QY, United Kingdom; Long Term Ecology Laboratory, Department of Zoology, University of Oxford, United Kingdom; Department of Environmental and Geographical Science, University of Cape Town, South Africa
Recommended Citation:
Burrough S.L.,Thomas D.S.G.. Central southern Africa at the time of the African Humid Period: A new analysis of Holocene palaeoenvironmental and palaeoclimate data[J]. Quaternary Science Reviews,2013-01-01,80