DOI: 10.1002/2013GL058999
论文题名: Astronomically forced variations in western African rainfall (21°N-20°S) during the Last Interglacial period
作者: Govin A. ; Varma V. ; Prange M.
刊名: Geophysical Research Letters
ISSN: 0094-10246
EISSN: 1944-9977
出版年: 2014
卷: 41, 期: 6 起始页码: 2117
结束页码: 2125
语种: 英语
英文关键词: Africa
; astronomical forcing
; Last Interglacial
; marine sediment cores
; model simulations
; precipitation
Scopus关键词: Computer simulation
; Incident solar radiation
; Precipitation (chemical)
; Sea ice
; Sedimentation
; Submarine geology
; Africa
; Astronomical forcing
; Last interglacial
; Marine sediments
; Model simulation
; Rain
; astronomy
; climate forcing
; general circulation model
; iceberg
; insolation
; Last Interglacial
; marine sediment
; melting
; paleoclimate
; precipitation (climatology)
; proxy climate record
; rainfall
; sediment core
; West Africa
英文摘要: This study documents the long-term evolution of western African precipitation during the Last Interglacial (LIG). We compare geochemical records obtained on nine sediment cores from the western African margin to a transient simulation (130-115 ka) performed with an ocean-atmosphere general circulation model and insolation as sole forcing. Good agreement between proxy records and model outputs indicates that long-term changes in western African precipitation largely responded to insolation variations during most of the LIG. After an early LIG dry phase (related to high-latitude iceberg melting or dating uncertainties), boreal summer insolation controlled the intensification of the North African monsoon between 127 and 122 ka, perhaps facilitating human migrations out of Africa. Equatorial African rainfall slightly increased throughout the LIG in response to increasing annual insolation. East-west contrasting rainfall evolutions at 10-20°S illustrate the complex southern African response, in contrast to more direct responses of North and equatorial western Africa, to insolation forcing. © 2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84898872033&doi=10.1002%2f2013GL058999&partnerID=40&md5=06bdea255c8ae1c28dd03b65bcf5d697
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/7510
Appears in Collections: 气候减缓与适应
There are no files associated with this item.
作者单位: MARUM-Center for Marine Environmental Sciences, University of Bremen, Bremen, Germany
Recommended Citation:
Govin A.,Varma V.,Prange M.. Astronomically forced variations in western African rainfall (21°N-20°S) during the Last Interglacial period[J]. Geophysical Research Letters,2014-01-01,41(6).