DOI: 10.5194/cp-10-1925-2014
Scopus记录号: 2-s2.0-84908397612
论文题名: The influence of atmospheric circulation on the mid-Holocene climate of Europe: A data-model comparison
作者: Mauri A. ; Davis B.A.S. ; Collins P.M. ; Kaplan J.O.
刊名: Climate of the Past
ISSN: 18149324
出版年: 2014
卷: 10, 期: 5 起始页码: 1925
结束页码: 1938
语种: 英语
Scopus关键词: anticyclone
; atmospheric circulation
; atmospheric dynamics
; climate modeling
; climate variation
; database
; Holocene
; insolation
; paleoatmosphere
; paleoclimate
; top of atmosphere
; westerly
; Scandinavia
英文摘要: The atmospheric circulation is a key area of uncertainty in climate model simulations of future climate change, especially in mid-latitude regions such as Europe where atmospheric dynamics have a significant role in climate variability. It has been proposed that the mid-Holocene was characterized in Europe by a stronger westerly circulation in winter comparable with a more positive AO/NAO, and a weaker westerly circulation in summer caused by anti-cyclonic blocking near Scandinavia. Model simulations indicate at best only a weakly positive AO/NAO, whilst changes in summer atmospheric circulation have not been widely investigated. Here we use a new pollen-based reconstruction of European mid-Holocene climate to investigate the role of atmospheric circulation in explaining the spatial pattern of seasonal temperature and precipitation anomalies. We find that the footprint of the anomalies is entirely consistent with those from modern analogue atmospheric circulation patterns associated with a strong westerly circulation in winter (positive AO/NAO) and a weak westerly circulation in summer associated with anti-cyclonic blocking (positive SCAND). We find little agreement between the reconstructed anomalies and those from 14 GCMs that performed mid-Holocene experiments as part of the PMIP3/CMIP5 project, which show a much greater sensitivity to top-of-the-atmosphere changes in solar insolation. Our findings are consistent with data-model comparisons on contemporary timescales that indicate that models underestimate the role of atmospheric circulation in recent climate change, whilst also highlighting the importance of atmospheric dynamics in explaining interglacial warming. © Author(s) 2014. CC Attribution 3.0 License. 资助项目: SNSF, Swiss National Science Foundation
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/49212
Appears in Collections: 气候变化与战略
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Recommended Citation:
Mauri A.,Davis B.A.S.,Collins P.M.,et al. The influence of atmospheric circulation on the mid-Holocene climate of Europe: A data-model comparison[J]. Climate of the Past,2014-01-01,10(5)