DOI: 10.1016/j.quascirev.2015.07.026
Scopus记录号: 2-s2.0-84938766887
论文题名: The 5.2 ka climate event: Evidence from stable isotope and multi-proxy palaeoecological peatland records in Ireland
作者: Roland T.P. ; Daley T.J. ; Caseldine C.J. ; Charman D.J. ; Turney C.S.M. ; Amesbury M.J. ; Thompson G.J. ; Woodley E.J.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2015
卷: 124 起始页码: 209
结束页码: 223
语种: 英语
英文关键词: 5.2 ka event
; Ireland
; Mid-Holocene
; Multi-proxy
; North Atlantic Oscillation (NAO)
; Peatlands
; Plant macrofossils
; Stable isotopes
; Testate amoebae
Scopus关键词: Atmospheric pressure
; Balloons
; Cellulose
; Earth atmosphere
; Isotopes
; Protozoa
; 5.2 ka event
; Holocenes
; Ireland
; Multi proxies
; North Atlantic oscillations
; Peat land
; Plant macrofossils
; Stable isotopes
; Testate amoebae
; Wetlands
; air-sea interaction
; airflow
; carbon isotope
; chronology
; climate variation
; fossil record
; Holocene
; meridional circulation
; North Atlantic Oscillation
; overturn
; oxygen isotope
; paleoclimate
; paleoecology
; peatland
; precipitation (climatology)
; proxy climate record
; stable isotope
; Ireland
; Bryophyta
英文摘要: Evidence for a major climate event at 5.2 ka has been reported globally and is associated with considerable societal disruption, but is poorly characterised in northwest Europe. This event forms part of a broader period of re-organisation in the Earth's ocean-atmosphere circulation system between 6 and 5 ka. This study tests the nature and timing of the event in northwest Europe, a region highly sensitive to change in meridional overturning circulation and mid-latitude westerly airflow. Here we report three high-resolution Irish multi-proxy records obtained from ombrotrophic peatlands that have robust chronological frameworks. We identify the 5.2 ka event by a sustained decrease in δ18Ocellulose at all three sites, with additional and parallel changes in δ13Ccellulose and palaeoecological (testate amoebae, plant macrofossil and humification) data from two sites in northern Ireland. Data from Sluggan Moss demonstrate a particularly coherent shift towards wetter conditions. These data support the hypothesis that the event was caused by a prolonged period of positive North Atlantic Oscillation conditions, resulting in pervasive cyclonic weather patterns across northwest Europe, increasing precipitation over Ireland. © 2015 The Authors. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/59845
Appears in Collections: 过去全球变化的重建
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作者单位: Geography, College of Life and Environmental Sciences, University of Exeter, United Kingdom; School of Geography, Earth and Environmental Sciences, Plymouth University, United Kingdom; School of Biological, Earth and Environmental Sciences, University of New South Wales, Australia
Recommended Citation:
Roland T.P.,Daley T.J.,Caseldine C.J.,et al. The 5.2 ka climate event: Evidence from stable isotope and multi-proxy palaeoecological peatland records in Ireland[J]. Quaternary Science Reviews,2015-01-01,124