DOI: 10.1016/j.quascirev.2014.09.027
Scopus记录号: 2-s2.0-84909599486
论文题名: Lake level and climate records of the last 90ka from the Northern Basin of Lake Van, eastern Turkey
作者: Çağatay M.N. ; Öğretmen N. ; Damci E. ; Stockhecke M. ; Sancar Ü. ; Eriş K.K. ; Özeren S.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2014
卷: 104 起始页码: 97
结束页码: 116
语种: 英语
英文关键词: 90ka climate records
; ICDP PaleoVan
; Lake level
; Lake Van
; Multproxy analyses
; Northern Basin
Scopus关键词: Climate record
; ICDP PaleoVan
; Lake levels
; Lake vans
; Multproxy analyses
; Northern basins
; authigenesis
; climate variation
; Dansgaard-Oeschger cycle
; Holocene
; interstadial
; lake level
; marine isotope stage
; paleoclimate
; precipitation (climatology)
; proxy climate record
; Anatolia
; Atlantic Ocean
; Iran
; Kordestan
; Lake Urmia
; Lake Van
; Lake Zeribar
; Levant
; Mediterranean Region
; Turkey
英文摘要: Sedimentary, geochemical and mineralogical analyses of the ICDP cores recovered from the Northern Basin (NB) of Lake Van provide evidence of lake level and climatic changes related to orbital and North Atlantic climate system over the last 90ka. High lake levels are generally observed during the interglacial and interstadial periods, which are marked by deposition of varved sediments with high total organic carbon (TOC), total inorganic carbon (TIC), low detrital influx (high Ca/F) and high δ18O and δ13C values of authigenic carbonate. During the glacial and stadial periods of 71-58kaBP (Marine Isotope Stage 4, MIS4) and end of last glaciation-deglaciation (30-14.5kaBP; MIS3) relatively low lake levels prevailed, and grey homogeneous to faintly laminated clayey silts were deposited at high sedimentation and low organic productivity rates.Millennial-scale variability of the proxies during 60-30kaBP (MIS3 is correlated with the Dansgaard-Oeschger (D-O)) and Holocene abrupt climate events in the Atlantic. These events are characterized by laminated sediments, with high TOC, TIC, Ca/Fe, δ18O and δ13C values. The Lake Van NB records correlate well in the region with the climate records from the lakes Zeribar and Urmia in Iran and the Sofular Cave in NW Anatolia, but are in general in anti-phase to those from the Dead Sea Basin (Lake Lisan) in the Levant. The relatively higher δ18O values (0 to-0.4‰) for the interglacial and interstadial periods in the Lake Van NB section are due to the higher temperature and seasonality of precipitation and higher evaporation, whereas the lower values (-0.8 to-2‰) during the glacial and stadial periods are caused mainly by relative decrease in both temperature and seasonality of precipitation. The high δ18O values (up to 4.2‰) during the Younger Dryas, together with the presence of dolomite and low TOC contents, supports evaporative conditions and low lake level. A gradual decrease in the δ18O values from an average of-0.4‰ during the humid early Holocene to an average of-3.5‰ during the more arid late Holocene suggests an increasing contribution of winter precipitation. The changes in the seasonality of precipitation in eastern Anatolia are probably caused by changes in the temperatures of North Atlantic and Mediterranean and in the strength of Siberian High. © 2014 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/60124
Appears in Collections: 过去全球变化的重建
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作者单位: Istanbul Technical University, Eastern Mediterranean Centre for Oceanography and Limnology (EMCOL), Ayazağa Kampusu, Maslak, Istanbul, Turkey; Istanbul Technical University, Faculty of Mines, Geological Engineering Department, Turkey; Istanbul Technical University, Eurasia Institute of Earth Sciences, Turkey; Eawag, Swiss Federal Institute of Aquatic Science and Technology, Department of Surface Waters Research and Management, Switzerland; ETH, Geological Institute, Zurich Universitaetsstrasse 5, Zurich, Switzerland; Firat University, Department of Geological Engineering, Elaziğ, Turkey
Recommended Citation:
Çağatay M.N.,Öğretmen N.,Damci E.,et al. Lake level and climate records of the last 90ka from the Northern Basin of Lake Van, eastern Turkey[J]. Quaternary Science Reviews,2014-01-01,104