DOI: 10.1016/j.quascirev.2018.08.014
Scopus记录号: 2-s2.0-85052951492
论文题名: Orbital-scale environmental and climatic changes recorded in a new ∼200,000-year-long multiproxy sedimentary record from Padul, southern Iberian Peninsula
作者: Camuera J. ; Jiménez-Moreno G. ; Ramos-Román M.J. ; García-Alix A. ; Toney J.L. ; Anderson R.S. ; Jiménez-Espejo F. ; Kaufman D. ; Bright J. ; Webster C. ; Yanes Y. ; Carrión J.S. ; Ohkouchi N. ; Suga H. ; Yamame M. ; Yokoyama Y. ; Martínez-Ruiz F.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2018
卷: 198 起始页码: 91
结束页码: 114
语种: 英语
英文关键词: Climate
; Environmental changes
; Facies
; Holocene
; Lake level
; Padul
; Pleistocene
Scopus关键词: Geochemistry
; Incident solar radiation
; Lakes
; Lithology
; Magnetic susceptibility
; Molluscs
; Organic carbon
; Sedimentology
; Vegetation
; Wetlands
; Climate
; Environmental change
; Facies
; Holocenes
; Lake levels
; Padul
; Pleistocene
; Climate change
; climate variation
; environmental change
; facies
; historical record
; Holocene
; lake level
; paleoecology
; paleoenvironment
; paleontology
; Pleistocene
; proxy climate record
; radiocarbon dating
; sedimentary sequence
; sedimentary structure
; vegetation cover
; vegetation dynamics
; wetland
; Andalucia
; California
; Granada [Andalucia]
; Iberian Peninsula
; Padul Basin
; Sierra Nevada [California]
; Spain
; United States
; Characeae
; Gastropoda
; Mollusca
英文摘要: Padul is one of the few wetland sites in southern Europe and the Mediterranean region that exhibits an unusually large temporal span (>100 kyr) and continuous Quaternary sedimentary record. Previous core-based studies from Padul yielded paleoecological datasets (i.e., pollen and organic geochemistry), but with a poor age control that resulted in rather arbitrary climate inferences. Therefore, precise age control and a multidisciplinary approach is necessary to understand long-term regional environmental and climate change and the associated local response of the Padul wetland environment. Here we present a new long sediment record (Padul-15-05) from this wetland in the southern Iberian Peninsula with the aim of improving the age control of the sedimentary sequence and carrying out up-to-date high-resolution multiproxy analyses. In this study the age control is based on 61 AMS radiocarbon dates for the last ca. 50 kyr BP and on the extent of amino acid racemization (AAR) in mollusc shells extending back ∼118 kyr BP. No numerical ages are available for the bottom part of the core but the sediment accumulation rates (SAR) and the cyclostratigraphic analysis of the multiproxy data suggest that the core preserves a continuous record of the last ∼197 kyr (from late MIS 7 to present) with millennial-scale time resolution. Sedimentological (lithology, magnetic susceptibility, XRD, color), geochemical (XRF, TOC, C/N, % carbonate content) and paleontological (pollen, charophytes, gastropods) data show co-varying cyclical paleoenvironmental changes linked to orbital-scale climatic variability. Silicon, magnetic susceptibility (MS) and total organic carbon (TOC) data show periodicities between ∼26.2–19.6 kyr linked to insolation, which is strongly dominated by precession cycles at this latitude. High values of Si and MS data have been related to high siliciclastic/detrital input from Sierra Nevada range during minima in insolation due to enhanced soil weathering/erosion during regional aridity and lower forest cover recorded by the arboreal pollen, which could also be favored by a minor biogenic productivity. In addition, warm climate conditions during maxima in insolation mostly resulted in negative precipitation/evapotranspiration balance and low lake levels, while cold glacial and stadial periods were mainly characterized by positive precipitation/evapotranspiration balance, and therefore, high lake levels. The improved chronology of the Padul sedimentary sequence along with a multiproxy study permitted us to better relate environmental and vegetation changes to climatic events and to demonstrate how both local (i.e., lake level, sedimentation) and regional (i.e., vegetation) environments responded to orbital-scale climate changes. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112042
Appears in Collections: 气候减缓与适应
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作者单位: Departamento de Estratigrafía y Paleontología, Universidad de Granada, Spain; School of Geographical and Earth Sciences, University of Glasgow, United Kingdom; School of Earth and Sustainability, Northern Arizona University, United States; Department of Biogeochemistry, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Japan; 7351 E. Speedway Blvd, 30C, Tucson, AZ, United States; Department of Geology, University of Cincinnati, United States; Departamento de Biología Vegetal, Facultad de Biología, Universidad de Murcia, Spain; Institute for Space-Earth Environmental Research, Nagoya University, Japan; Atmosphere and Ocean Research Institute, University of Tokyo, Kashiwanoha, Chiba, Japan; Instituto Andaluz de Ciencias de la Tierra (IACT), Consejo Superior de Investigaciones Científicas-Universidad de Granada (CSIC-UGR), Granada, Spain
Recommended Citation:
Camuera J.,Jiménez-Moreno G.,Ramos-Román M.J.,et al. Orbital-scale environmental and climatic changes recorded in a new ∼200,000-year-long multiproxy sedimentary record from Padul, southern Iberian Peninsula[J]. Quaternary Science Reviews,2018-01-01,198