DOI: 10.5194/cp-9-13-2013
Scopus记录号: 2-s2.0-84872735150
论文题名: Influence of orbital forcing and solar activity on water isotopes in precipitation during the mid-and late Holocene
作者: Dietrich S. ; Werner M. ; Spangehl T. ; Lohmann G.
刊名: Climate of the Past
ISSN: 18149324
出版年: 2013
卷: 9, 期: 1 起始页码: 13
结束页码: 26
语种: 英语
Scopus关键词: climate modeling
; Holocene
; isotopic composition
; orbital forcing
; oxygen isotope
; paleoenvironment
; precipitation (climatology)
; precipitation quality
; solar activity
; speleothem
; temperature profile
; water
; Bunker Cave
; Germany
; North Rhine-Westphalia
英文摘要: In this study we investigate the impact of mid-and late Holocene orbital forcing and solar activity on variations of the oxygen isotopic composition in precipitation. The investigation is motivated by a recently published speleothem δ18O record from the well-monitored Bunker Cave in Germany. The record reveals some high variability on multi-centennial to millennial scales that does not linearly correspond to orbital forcing. Our model study is based on a set of novel climate simulations performed with the atmosphere general circulation model ECHAM5-wiso enhanced by explicit water isotope diagnostics. From the performed model experiments, we derive the following major results: (1) the response of both orbital and solar forcing lead to changes in surface temperatures and δ18O in precipitation with similar magnitudes during the mid-and late Holocene. (2) Past δ18O anomalies correspond to changing temperatures in the orbital driven simulations. This does not hold true if an additional solar forcing is added. (3) Two orbital driven mid-Holocene experiments, simulating the mean climate state approximately 5000 and 6000 yr ago, yield very similar results. However, if an identical additional solar activity-induced forcing is added, the simulated changes of surface temperatures as well as δ18O between both periods differ. We conclude from our simulation results that non-linear effects and feedbacks of the orbital and solar activity forcing substantially alter the δ18O in precipitation pattern and its relation to temperature change. © Author(s) 2013. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/49488
Appears in Collections: 气候变化与战略
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Recommended Citation:
Dietrich S.,Werner M.,Spangehl T.,et al. Influence of orbital forcing and solar activity on water isotopes in precipitation during the mid-and late Holocene[J]. Climate of the Past,2013-01-01,9(1)