DOI: 10.5194/cp-11-931-2015
Scopus记录号: 2-s2.0-84932649107
论文题名: A tropical speleothem record of glacial inception, the South American Summer Monsoon from 125 to 115 ka
作者: Burns S.J. ; Kanner L.C. ; Cheng H. ; Lawrence Edwards R.
刊名: Climate of the Past
ISSN: 18149324
出版年: 2015
卷: 11, 期: 6 起始页码: 931
结束页码: 938
语种: 英语
Scopus关键词: atmospheric circulation
; carbon dioxide
; climate variation
; glacial environment
; ice cover
; Last Interglacial
; long-term change
; monsoon
; Northern Hemisphere
; paleoclimate
; rainfall
; speleothem
; temperature effect
; terrestrial environment
; tropical environment
; Andes
; Peru
英文摘要: Relatively few marine or terrestrial paleoclimate studies have focused on glacial inception, the transition from an interglacial to a glacial climate state. As a result, neither the timing and structure of glacial inception nor the spatial pattern of glacial inception in different parts of the world is well known. Here we present results of a study of a speleothem from the Peruvian Andes that records changes in the intensity of South American Summer Monsoon (SASM) rainfall over the period from 125 to 115 ka. The results show that late in the last interglacial period, at 123 ka, SASM rainfall decreased, perhaps in response to a decrease in temperature and ice cover in the high northern latitudes and associated changes in atmospheric circulation. Then at 120.8 ka, a rapid increase in SASM rainfall marks the end of the last interglacial. After a more gradual increase between 120 and 117 ka, a second abrupt increase occurs at 117 ka. This pattern of change is mirrored to a remarkable degree by changes in the East Asian Monsoon. It is interpreted to reflect both a long-term gradual response of the monsoons to orbitally driven insolation changes and to rapid changes in Northern Hemisphere ice volume and temperature. Both monsoon systems are close to their full glacial conditions by 117 ka, before any significant decrease in atmospheric CO2 . © Author(s) 2015. 资助项目: NSF, National Stroke Foundation
; NSF, National Stroke Foundation
; NSF, National Stroke Foundation
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/49133
Appears in Collections: 气候变化与战略
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Recommended Citation:
Burns S.J.,Kanner L.C.,Cheng H.,et al. A tropical speleothem record of glacial inception, the South American Summer Monsoon from 125 to 115 ka[J]. Climate of the Past,2015-01-01,11(6)