DOI: 10.5194/cp-9-2117-2013
Scopus记录号: 2-s2.0-84883695163
论文题名: A mid-Holocene climate reconstruction for eastern South America
作者: Prado L.F. ; Wainer I. ; Chiessi C.M. ; Ledru M.-P. ; Turcq B.
刊名: Climate of the Past
ISSN: 18149324
出版年: 2013
卷: 9, 期: 5 起始页码: 2117
结束页码: 2133
语种: 英语
Scopus关键词: continental margin
; data interpretation
; data set
; Holocene
; insolation
; lake level
; monsoon
; paleoclimate
; precipitation (climatology)
; proxy climate record
; reconstruction
; summer
; South America
英文摘要: The mid-Holocene (6000 calibrated years before present) is a key period in palaeoclimatology because incoming summer insolation was lower than during the late Holocene in the Southern Hemisphere, whereas the opposite happened in the Northern Hemisphere. However, the effects of the decreased austral summer insolation over South American climate have been poorly discussed by palaeodata syntheses. In addition, only a few of the regional studies have characterised the mid-Holocene climate in South America through a multiproxy approach. Here, we present a multiproxy compilation of mid-Holocene palaeoclimate data for eastern South America. We compiled 120 palaeoclimatological datasets, which were published in 84 different papers. The palaeodata analysed here suggest a water deficit scenario in the majority of eastern South America during the mid-Holocene if compared to the late Holocene, with the exception of northeastern Brazil. Low mid-Holocene austral summer insolation caused a reduced land-sea temperature contrast and hence a weakened South American monsoon system circulation. This scenario is represented by a decrease in precipitation over the South Atlantic Convergence Zone area, saltier conditions along the South American continental margin, and lower lake levels. © Author(s) 2013. CC Attribution 3.0 License. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/49382
Appears in Collections: 气候变化与战略
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Recommended Citation:
Prado L.F.,Wainer I.,Chiessi C.M.,et al. A mid-Holocene climate reconstruction for eastern South America[J]. Climate of the Past,2013-01-01,9(5)