DOI: 10.5194/cp-12-2127-2016
Scopus记录号: 2-s2.0-84999837831
论文题名: North Atlantic Oscillation controls on oxygen and hydrogen isotope gradients in winter precipitation across Europe; Implications for palaeoclimate studies
作者: Deininger M. ; Werner M. ; McDermott F.
刊名: Climate of the Past
ISSN: 18149324
出版年: 2016
卷: 12, 期: 11 起始页码: 2127
结束页码: 2143
语种: 英语
英文摘要: Winter (October to March) precipitation δ18OP and δDP values in central Europe correlate with the winter North Atlantic Oscillation index (wNAOi), but the causal mechanisms remain poorly understood. Here we analyse the relationships between precipitation-weighted δ18OP and δDP datasets (δ18Opw and δDpw) from European GNIP and ANIP stations and the wNAOi, with a focus on isotope gradients. We demonstrate that longitudinal δ18Opw and δDpw gradients across Europe ("continental effect") depend on the wNAOi state, with steeper gradients associated with more negative wNAOi states. Changing gradients reflect a combination of air temperature and variable amounts of precipitable water as a function of the wNAOi. The relationships between the wNAOi, δ18Opw and δDpw can provide additional information from palaeoclimate archives such as European speleothems that primarily record winter δ18Opw. Comparisons between present-day and past European longitudinal δ18O gradients inferred from Holocene speleothems suggest that atmospheric pressure configurations akin to negative wNAO modes dominated the early Holocene, whereas patterns resembling positive wNAO modes were more common in the late Holocene, possibly caused by persistent shifts in the relative locations of the Azores High and the Icelandic Low. © Author(s) 2016. 资助项目: SFI, Science Foundation Ireland
; SFI, Science Foundation Ireland
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/48960
Appears in Collections: 气候变化与战略
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Recommended Citation:
Deininger M.,Werner M.,McDermott F.. North Atlantic Oscillation controls on oxygen and hydrogen isotope gradients in winter precipitation across Europe; Implications for palaeoclimate studies[J]. Climate of the Past,2016-01-01,12(11)