DOI: 10.1016/j.quascirev.2017.04.018
论文题名: Seasonal variability in Northern Hemisphere atmospheric circulation during the Medieval Climate Anomaly and the Little Ice Age
作者: Edwards T.W.D. ; Hammarlund D. ; Newton B.W. ; Sjolte J. ; Linderson H. ; Sturm C. ; St. Amour N.A. ; Bailey J.N.-L. ; Nilsson A.L.
刊名: Quaternary Science Reviews
出版年: 2017
卷: 165 起始页码: 102
结束页码: 110
语种: 英语
英文关键词: Arctic Oscillation
; Late Holocene
; North Atlantic Oscillation
; Northern Hemisphere extratropics
; Paleoclimatology
; Self-organizing maps
; Stable isotopes
; Synoptic circulation
Scopus关键词: Atmospheric pressure
; Climatology
; Conformal mapping
; Glacial geology
; Isotopes
; Trees (mathematics)
; Arctic Oscillation
; Extratropics
; Late Holocene
; North Atlantic oscillations
; Paleoclimatology
; Stable isotopes
; Synoptic circulations
; Self organizing maps
英文摘要: Here we report new reconstructions of winter temperature and summer moisture during the past millennium in southeastern Sweden, based on stable-isotope data from a composite tree-ring sequence, that further enhances our knowledge and understanding of seasonal climate variability in the Northern Hemisphere over the past millennium. Key features of these new climate proxy records include evidence for distinctive fluctuations in winter temperature in SE Sweden, superimposed upon the general pattern of cooling between the so-called Medieval Climate Anomaly (MCA) of the early millennium and the Little Ice Age (LIA) of the late millennium, as well as evidence for sustained summer wetness during the MCA, followed by drier and less variable conditions during the LIA. We also explore these new records within a circumpolar spatial context by employing self-organizing map analysis of meteorological reanalysis data to identify potential modern analogues of mid-tropospheric synoptic circulation types in the Northern Hemisphere extratropics that can reconcile varying seasonal climate states during the MCA and LIA in SE Sweden with less variable conditions in southwestern Canada, as portrayed by paleoclimate records developed in the same manner in an earlier study. © 2017 Elsevier Ltd 资助项目: Edwards, T.W.D.
; Earth and Environmental Sciences, University of Waterloo, 200 University Avenue West, Canada
; 电子邮件: twdedwar@uwaterloo.ca
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/59231
Appears in Collections: 过去全球变化的重建
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作者单位: Earth and Environmental Sciences, University of Waterloo, 200 University Avenue West, Waterloo, Canada; Quaternary Sciences, Department of Geology, Lund University, Sölvegatan 12, Lund, Sweden; Geography, University of Victoria, PO Box 1700 STN CSC, Victoria, Canada; Bert Bolin Centre for Climate Research, Stockholm University, Svante Arrhenius väg 8, Stockholm, Sweden
Recommended Citation:
Edwards T.W.D.,Hammarlund D.,Newton B.W.,et al. Seasonal variability in Northern Hemisphere atmospheric circulation during the Medieval Climate Anomaly and the Little Ice Age[J]. Quaternary Science Reviews,2017-01-01,165