DOI: 10.1016/j.quascirev.2016.01.016
Scopus记录号: 2-s2.0-84961340430
论文题名: Northern hemisphere climate control on the environmental dynamics in the glacial Black Sea "Lake"
作者: Wegwerth A. ; Kaiser J. ; Dellwig O. ; Shumilovskikh L.S. ; Nowaczyk N.R. ; Arz H.W.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2016
卷: 135 起始页码: 41
结束页码: 53
语种: 英语
英文关键词: Black Sea "Lake"
; Dansgaard-Oeschger stadials and interstadials
; Productivity
; Riverine and aeolian input
; Salinity
Scopus关键词: Climatology
; Glacial geology
; Paraffins
; Productivity
; Rain
; Strontium
; Trace elements
; Black sea
; Dansgaard-Oeschger cycles
; Environmental dynamics
; Interstadials
; Major and trace elements
; Marine isotope stages
; Riverine and aeolian input
; Salinity
; Lakes
; benthos
; Dansgaard-Oeschger cycle
; eolian deposit
; evaporation
; fluvial deposit
; lake level
; Last Glacial
; marine isotope stage
; Northern Hemisphere
; ostracod
; paleosalinity
; precipitation (climatology)
; primary production
; river discharge
; temperature
; vegetation cover
; westerly
; Black Sea
; Ostracoda
英文摘要: The Marine Isotope Stage (MIS) 3 stands out due to its abrupt changes from cold and dry stadials to warm and humid interstadials, the so-called Dansgaard-Oeschger cycles that also affected temperature and rainfall in the Black Sea region. This study is based on a gravity core from the southeastern (SE) Black Sea that covers the last glacial lake stage from 64 to 20 ka BP. By using the composition of major and trace elements in the sediments, terrestrial plant-derived n-alkane flux, and Sr/Ca from benthic ostracods, we reconstruct the variability of riverine and aeolian input, salinity, and productivity in the SE Black Sea region in response to the Northern Hemisphere climate oscillations. During colder and drier stadials, the aeolian input increased relative to the riverine discharge, potentially due to southward shifted and/or stronger westerly winds and due to changes in the vegetation cover. An evaporation exceeding freshwater supply by rainfall and rivers possibly caused higher salinity and a lower lake level. The environmental status during MIS 4 and 2 is very much comparable with the stadial conditions during MIS 3. During warmer and more humid interstadials, lower salinity and presumably positive lake level changes most likely resulted from increased precipitation and river discharge. This likely increased primary productivity through an augmented nutrient supply. Lowest average salinities are suggested for the middle part of MIS 3 in response to enhanced meltwater from the disintegrating Fennoscandian Ice Sheet and/or by generally more humid conditions. © 2016 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/59679
Appears in Collections: 过去全球变化的重建
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作者单位: Leibniz-Institute for Baltic Sea Research Warnemünde (IOW), Marine Geology, Rostock, Germany; Department of Palynology and Climate Dynamics, University of Göttingen, Göttingen, Germany; Laboratory of Biogeochemical and Remote Techniques of Environmental Monitoring, National Research Tomsk State University, Tomsk, Russian Federation; Helmholtz Centre Potsdam, GFZ German Research Centre for Geosciences, Section Climate Dynamics and Landscape Evolution, Potsdam, Germany
Recommended Citation:
Wegwerth A.,Kaiser J.,Dellwig O.,et al. Northern hemisphere climate control on the environmental dynamics in the glacial Black Sea "Lake"[J]. Quaternary Science Reviews,2016-01-01,135