干旱区生态环境知识资源中心(Arid): Pronounced Northwest African Monsoon Discharge During the Mid- to Late Holocene

Arid

DOI	10.3389/feart.2019.00314
	Pronounced Northwest African Monsoon Discharge During the Mid- to Late Holocene
	Hoepker, Sebastian 1,2,3; Wu, Henry C.1; Mueller, Peter 1,4; Barusseau, Jean Paul 5; Vernet, Robert 6; Lucassen, Friedrich 2,7; Kasemann, Simone A.2,7; Westphal, Hildegard 1,2
通讯作者	Hoepker, Sebastian ; Wu, Henry C.
来源期刊	FRONTIERS IN EARTH SCIENCE
EISSN	2296-6463
出版年	2019
卷号	7
英文摘要	The mid- to late Holocene aridification pattern of NW Africa remains a matter of controversial debate. While many marine climate reconstructions indicate a relatively abrupt aridification at similar to 5.5 ka BP, terrestrial palaeoclimate records rather show a spatially and temporally heterogeneous transition towards the modern arid state. To bridge conflicting evidence, we analysed high-resolution (sub-seasonal) ontogenetic oxygen isotope (delta O-18) records and bulk Sr-87/Sr-86 ratios of bivalve shells and fish otoliths of estuarine-associated species. Samples were excavated from archaeological deposits formed during the mid- to late Holocene in a large palaeo-estuary east of the Banc d'Arguin, Mauritania. The mid-Holocene (similar to 5.2 ka BP) delta O-18 records indicated unrealistically high water temperatures when assuming a modern value for delta O-18(Seawater), suggesting a substantial input of isotopically lighter water to the study area. Respective salinity estimates consistently indicated persistent monsoonal discharge. Moreover, Sr-87/Sr-86 ratios of bivalve shells deviated considerably from the rather stable global seawater composition, further supporting the presence of significant terrestrial runoff between 5.0 and 5.3 ka BP. Altogether, our results support doubts regarding an abrupt termination of the African Humid Period (AHP) in the coastal areas of NW Africa, and show that fully marine conditions were established along the Banc d'Arguin by similar to 3.0 ka BP.
英文关键词	African Humid Period Mauritania sclerochronology bivalves fish otoliths archaeology oxygen isotopes Sr- 87 Sr-86
类型	Article
语种	英语
国家	Germany ; New Zealand ; France ; Mauritania
开放获取类型	gold, Green Published
收录类别	SCI-E
WOS记录号	WOS:000502776800001
WOS关键词	HUMID PERIOD ; HIGH-RESOLUTION ; MOLLUSK SHELLS ; SALOUM DELTA ; BANC DARGUIN ; CLIMATE ; ISOTOPE ; STRONTIUM ; OXYGEN ; DUST
WOS类目	Geosciences, Multidisciplinary
WOS研究方向	Geology
EI主题词	2019-11-29
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/311016
作者单位	1.Leibniz Ctr Trop Marine Res ZMT GmbH, Bremen, Germany; 2.Univ Bremen, Fac Geosci, Bremen, Germany; 3.Univ Waikato, Fac Sci & Engn, Sch Sci, Environm Res Inst, Hamilton, New Zealand; 4.BDG Berufsverband Deutsch Geowissensch eV, Bonn, Germany; 5.Univ Perpignan Via Domitia, UMR 5110, Ctr Format & Rech Environm Mediterraneens, Perpignan, France; 6.Inst Mauritanien Rech Sci, Nouakchott, Mauritania; 7.Univ Bremen, MARUM Ctr Marine Environm Sci, Bremen, Germany
推荐引用方式 GB/T 7714	Hoepker, Sebastian,Wu, Henry C.,Mueller, Peter,et al. Pronounced Northwest African Monsoon Discharge During the Mid- to Late Holocene[J],2019,7.
APA	Hoepker, Sebastian.,Wu, Henry C..,Mueller, Peter.,Barusseau, Jean Paul.,Vernet, Robert.,...&Westphal, Hildegard.(2019).Pronounced Northwest African Monsoon Discharge During the Mid- to Late Holocene.FRONTIERS IN EARTH SCIENCE,7.
MLA	Hoepker, Sebastian,et al."Pronounced Northwest African Monsoon Discharge During the Mid- to Late Holocene".FRONTIERS IN EARTH SCIENCE 7(2019).