DOI: 10.1016/j.quascirev.2018.11.030
Scopus记录号: 2-s2.0-85057979676
论文题名: Investigating the 8.2 ka event in northwestern Madagascar: Insight from data–model comparisons
作者: Voarintsoa N.R.G. ; Matero I.S.O. ; Railsback L.B. ; Gregoire L.J. ; Tindall J. ; Sime L. ; Cheng H. ; Edwards R.L. ; Brook G.A. ; Kathayat G. ; Li X. ; Michel Rakotondrazafy A.F. ; Madison Razanatseheno M.O.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2019
卷: 204 起始页码: 172
结束页码: 186
语种: 英语
英文关键词: 8.2 ka event
; AMOC
; Data–model comparisons
; Holocene
; ITCZ–Monsoon
; Madagascar
; Paleoclimate modeling
; Speleothems
; Stable isotopes
Scopus关键词: Atmospheric thermodynamics
; Oceanography
; 8.2 ka event
; AMOC
; Holocenes
; Madagascar
; Model comparison
; Paleoclimates
; Speleothems
; Stable isotopes
; Climate models
; climate modeling
; comparative study
; Holocene
; intertropical convergence zone
; meridional circulation
; Northern Hemisphere
; paleoclimate
; proxy climate record
; speleothem
; stable isotope
; Atlantic Ocean
; Madagascar
英文摘要: The 8.2 ka event is a well-known cooling event in the Northern Hemisphere, but is poorly understood in Madagascar. Here, we compare paleoclimate data and outputs from paleoclimate simulations to better understand it. Records from Madagascar suggest two distinct sub-events (8.3 ka and 8.2 ka), that seem to correlate with records from northern high latitude. This could indicate causal relationships via changes in the Atlantic Meridional Overturning Circulation (AMOC) with changes in moisture source's δ18O, and changes in the mean position of the Inter-Tropical Convergence Zone (ITCZ), as climate modelling suggests. These two sub-events are also apparent in other terrestrial records, but the climatic signals are different. The prominent 8.2 ka sub-event records a clear antiphase relationship between the northern and southern hemisphere monsoons, whereas such relationship is less evident during the first 8.3 ka sub-event. Data–model comparison have also shown a mismatch between the paleoclimate data and the model outputs, the causes of which are more or less understood and may lie in the proxies, in the model, or in both data and model. Knowing that paleoclimate proxies and climate models produce different sets of variables, further research is needed to improve the data–model comparison approach, so that both paleoclimate data and paleoclimate models will better predict the likely climate status of a region during a specified time in the past with minimal uncertainties. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/117412
Appears in Collections: 气候变化与战略
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Recommended Citation:
Voarintsoa N.R.G.,Matero I.S.O.,Railsback L.B.,et al. Investigating the 8.2 ka event in northwestern Madagascar: Insight from data–model comparisons[J]. Quaternary Science Reviews,2019-01-01,204