DOI: 10.5194/cp-8-227-2012
Scopus记录号: 2-s2.0-84859891144
论文题名: Northern Hemisphere temperature patterns in the last 12 centuries
作者: Ljungqvist F.C. ; Krusic P.J. ; Brattström G. ; Sundqvist H.S.
刊名: Climate of the Past
ISSN: 18149324
出版年: 2012
卷: 8, 期: 1 起始页码: 227
结束页码: 249
语种: 英语
Scopus关键词: climate change
; dominance
; geographical variation
; land type
; Northern Hemisphere
; proxy climate record
; spatiotemporal analysis
; time series
英文摘要: We analyse the spatio-temporal patterns of temperature variability over Northern Hemisphere land areas, on centennial time-scales, for the last 12 centuries using an unprecedentedly large network of temperature-sensitive proxy records. Geographically widespread positive temperature anomalies are observed from the 9th to 11th centuries, similar in extent and magnitude to the 20th century mean. A dominance of widespread negative anomalies is observed from the 16th to 18th centuries. Though we find the amplitude and spatial extent of the 20th century warming is within the range of natural variability over the last 12 centuries, we also find that the rate of warming from the 19th to the 20th century is unprecedented in the context of the last 1200 yr. The positive Northern Hemisphere temperature change from the 19th to the 20th century is clearly the largest between any two consecutive centuries in the past 12 centuries. These results remain robust even after removing a significant number of proxies in various tests of robustness showing that the choice of proxies has no particular influence on the overall conclusions of this study. © 2009 Author(s). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/49522
Appears in Collections: 气候变化与战略
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Recommended Citation:
Ljungqvist F.C.,Krusic P.J.,Brattström G.,et al. Northern Hemisphere temperature patterns in the last 12 centuries[J]. Climate of the Past,2012-01-01,8(1)