Arid
DOI10.1371/journal.pone.0076514
Dynamics of Green Sahara Periods and Their Role in Hominin Evolution
Larrasoana, Juan C.1,2; Roberts, Andrew P.2; Rohling, Eelco J.2,3
通讯作者Larrasoana, Juan C.
来源期刊PLOS ONE
ISSN1932-6203
出版年2013
卷号8期号:10
英文摘要

Astronomically forced insolation changes have driven monsoon dynamics and recurrent humid episodes in North Africa, resulting in green Sahara Periods (GSPs) with savannah expansion throughout most of the desert. Despite their potential for expanding the area of prime hominin habitats and favouring out-of-Africa dispersals, GSPs have not been incorporated into the narrative of hominin evolution due to poor knowledge of their timing, dynamics and landscape composition at evolutionary timescales. We present a compilation of continental and marine paleoenvironmental records from within and around North Africa, which enables identification of over 230 GSPs within the last 8 million years. By combining the main climatological determinants of woody cover in tropical Africa with paleoenvironmental and paleoclimatic data for representative (Holocene and Eemian) GSPs, we estimate precipitation regimes and habitat distributions during GSPs. Their chronology is consistent with the ages of Saharan archeological and fossil hominin sites. Each GSP took 2-3 kyr to develop, peaked over 4-8 kyr, biogeographically connected the African tropics to African and Eurasian mid latitudes, and ended within 2-3 kyr, which resulted in rapid habitat fragmentation. We argue that the well-dated succession of GSPs presented here may have played an important role in migration and evolution of hominins.


类型Article
语种英语
国家Spain ; Australia ; England
收录类别SCI-E ; SSCI ; AHCI
WOS记录号WOS:000326019400068
WOS关键词DAKHLA OASIS REGION ; WESTERN DESERT ; NORTH-AFRICA ; MONSOON VARIABILITY ; LATE QUATERNARY ; PLUVIAL EPISODES ; HUMAN DISPERSAL ; WATER-BALANCE ; PAST CLIMATE ; FAZZAN BASIN
WOS类目Multidisciplinary Sciences
WOS研究方向Science & Technology - Other Topics
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/179427
作者单位1.Inst Geol & Minero Espana, Zaragoza, Spain;
2.Australian Natl Univ, Res Sch Earth Sci, Canberra, ACT, Australia;
3.Univ Southampton, Sch Ocean & Earth Sci, Natl Oceanog Ctr, Southampton, Hants, England
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GB/T 7714
Larrasoana, Juan C.,Roberts, Andrew P.,Rohling, Eelco J.. Dynamics of Green Sahara Periods and Their Role in Hominin Evolution[J],2013,8(10).
APA Larrasoana, Juan C.,Roberts, Andrew P.,&Rohling, Eelco J..(2013).Dynamics of Green Sahara Periods and Their Role in Hominin Evolution.PLOS ONE,8(10).
MLA Larrasoana, Juan C.,et al."Dynamics of Green Sahara Periods and Their Role in Hominin Evolution".PLOS ONE 8.10(2013).
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