DOI: 10.1016/j.quascirev.2015.06.021
Scopus记录号: 2-s2.0-84936884936
论文题名: Interhemispheric dynamics of the African rainbelt during the late Quaternary
作者: Singarayer J.S. ; Burrough S.L.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2015
卷: 124 起始页码: 48
结束页码: 67
语种: 英语
英文关键词: Africa
; Climate change
; Intertropical Convergence Zone (ITCZ)
; Quaternary
; Tropical rainbelt
Scopus关键词: Atmospheric temperature
; Climate change
; Glacial geology
; Moisture control
; Oceanography
; Precipitation (meteorology)
; Rain
; Surface waters
; Tropics
; Africa
; Climate model simulations
; Contraction and expansion
; Intertropical convergence zone
; Precipitation variability
; Quaternary
; Rainbelt
; Sea surface temperature (SST)
; Climate models
; climate modeling
; climate variation
; intertropical convergence zone
; paleoenvironment
; paleohydrology
; precipitation intensity
; Quaternary
; rainband
; sea surface temperature
; Africa
; Indian Ocean
英文摘要: The spatial pattern of precipitation variability in tropical and subtropical Africa over the late Quaternary has long been debated. Prevailing hypotheses variously infer (1) insolation-controlled asymmetry of wet phases between hemispheres, (2) symmetric contraction and expansion of the tropical rainbelt, and (3) independent control on moisture available in Southern Africa via sea surface temperatures in the Indian Ocean. In this study we use climate-model simulations covering the last glacial cycle (120. kyr) with HadCM3 and the multi-model ensembles from PMIP3 (the Palaeoclimate Model Intercomparison Project) to investigate the long-term behaviour of the African rainbelt, and test these simulations against existing empirical palaeohydrological records. Through regional model-data comparisons we find evidence for the validity of several hypotheses, with various proposed processes occurring concurrently but with different regional emphasis (e.g. asymmetric shifts at the seasonal extremes and symmetric expansions/contractions towards West equatorial regions). Crucially, variations in rainfall are associated with multiple forcing mechanisms that vary in their dominance both spatially and temporally over the glacial cycle an important consideration when interpreting and extrapolating from often relatively short palaeoenvironmental records. © 2015 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/59843
Appears in Collections: 过去全球变化的重建
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作者单位: Department of Meteorology and Centre for Past Climate Change, University of Reading, United Kingdom; Environmental Change Institute, University of Oxford, United Kingdom
Recommended Citation:
Singarayer J.S.,Burrough S.L.. Interhemispheric dynamics of the African rainbelt during the late Quaternary[J]. Quaternary Science Reviews,2015-01-01,124