干旱区生态环境知识资源中心(Arid): The leaf wax biomarker record of a Namibian salt pan reveals enhanced summer rainfall during the Last Glacial-Interglacial Transition

Arid

DOI	10.1016/j.palaeo.2019.109561
	The leaf wax biomarker record of a Namibian salt pan reveals enhanced summer rainfall during the Last Glacial-Interglacial Transition
	Belz, Lukas 1,2; Schueller, Irka 3; Wehrmann, Achim 3; Koester, Juergen 1; Wilkes, Heinz 1,2
通讯作者	Wilkes, Heinz
来源期刊	PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
ISSN	0031-0182
EISSN	1872-616X
出版年	2020
卷号	543
英文摘要	Conventional continental geoarchives are rarely available in arid southern Africa. Therefore, palaeoclimate data in this area are still patchy and late Quaternary climate development is only poorly understood. In the western Kalahari, salt pans (playas, ephemeral lakes) are common and can feature quasi-continuous sedimentation. This study presents the first climate-related biomarker record using sediments from the Omongwa Pan, a Kalahari salt pan located in eastern Namibia. Our approach to reconstruct vegetation and hydrology focuses on biogeochemical bulk parameters and plant wax-derived lipid biomarkers (n-alkanes, n-alkanols, and fatty acids) and their compound-specific carbon and hydrogen isotopic compositions. The presented record reaches back to 27 ka. During the glacial, rather low delta H-2 values of n-alkanes and low sediment input exclude a strong influence of winter rainfall. n-Alkane and n-alkanol distributions and delta C-13 values of n-hentriacontane (n-C-31) indicate a shift to a vegetation with a higher proportion of C-4 plants at the end of the Last Glacial Maximum until the end of Heinrich Stadial I (ca. 18-14.8 ka), which we interpret to indicate an abrupt excursion to a short wetter period likely to be caused by a temporary southward shift of the Intertropical Convergence Zone. Shifts in delta H-2 values of n-C-31 and plant wax parameters give evidence for changes to drier conditions during early Holocene. Comparison of this dataset with representative continental records from the region points to a major influence of summer rainfall at Omongwa Pan during the regarded time span and demonstrates the potential of southern African salt pans as archives for biomarker-based climate proxies.
英文关键词	n-Alkanes n-Alkanols Organic geochemistry Southern Africa Late Quaternary Palaeohydrology
类型	Article
语种	英语
国家	Germany
收录类别	SCI-E
WOS记录号	WOS:000518707600016
WOS关键词	HYDROGEN-ISOTOPIC COMPOSITION ; SOUTH-AFRICA IMPLICATIONS ; N-ALKANE DISTRIBUTIONS ; FOSSIL HYRAX DUNG ; LATE PLEISTOCENE ; LATE QUATERNARY ; SOUTHWESTERN KALAHARI ; STABLE-ISOTOPE ; GEOGRAPHICAL-DISTRIBUTION ; HOLOCENE VEGETATION
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary ; Paleontology
WOS研究方向	Physical Geography ; Geology ; Paleontology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/315276
作者单位	1.Carl von Ossietzky Univ Oldenburg, Inst Chem & Biol Marine Environm ICBM, D-26111 Oldenburg, Germany; 2.GFZ German Res Ctr Geosci, Helmholtz Ctr Potsdam, D-14473 Potsdam, Germany; 3.Senckenberg Meer, Marine Res Dept, D-26382 Wilhelmshaven, Germany
推荐引用方式 GB/T 7714	Belz, Lukas,Schueller, Irka,Wehrmann, Achim,et al. The leaf wax biomarker record of a Namibian salt pan reveals enhanced summer rainfall during the Last Glacial-Interglacial Transition[J],2020,543.
APA	Belz, Lukas,Schueller, Irka,Wehrmann, Achim,Koester, Juergen,&Wilkes, Heinz.(2020).The leaf wax biomarker record of a Namibian salt pan reveals enhanced summer rainfall during the Last Glacial-Interglacial Transition.PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY,543.
MLA	Belz, Lukas,et al."The leaf wax biomarker record of a Namibian salt pan reveals enhanced summer rainfall during the Last Glacial-Interglacial Transition".PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY 543(2020).