DOI: 10.1016/j.palaeo.2015.08.040
论文题名: Evidence of Atlantic Multidecadal Oscillation in the magnetic properties of Alpine lakes during the last 2500years
作者: Lanci L. ; Hirt A.M.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2015
卷: 440 起始页码: 47
结束页码: 52
语种: 英语
英文关键词: Alpine Lakes
; Atlantic Multidecadal Oscillation
; Holocene
; Rock-magnetism
英文摘要: We re-analyzed rock-magnetic data of lake sediments from the Alpine region, which were previously recognized as sensitive climate proxy records, in search of decadal climate variability. Different methods of spectral analysis applied to the rock-magnetic data from two independent lake records show the presence of a coherent and statistically significant periodicity with a period of about 50-60. years. The frequency-filtered signal of this component co-varies with the instrumental record of the Atlantic Multidecadal Oscillation (AMO) over the last 110. years with a negligible phase shift. After having tested and ruled out the possible influence of solar irradiance in the putative AMO frequency band, based on spectral properties, we suggest that a significant influence of AMO in the Alpine region extends back in time for at least two millennia. Comparison of the amplitude of the AMO record with that of the Younger Dryas/Holocene transition suggests that AMO fluctuations played a significant role in pacing the past variability of the Alpine climate. © 2015 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/68721
Appears in Collections: 过去全球变化的重建
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作者单位: DiSBeF, University of Urbino, Urbino, Italy; Institute of Geophysics, ETH-Zurich, Switzerland
Recommended Citation:
Lanci L.,Hirt A.M.. Evidence of Atlantic Multidecadal Oscillation in the magnetic properties of Alpine lakes during the last 2500years[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2015-01-01,440