气候变化领域集成服务门户(CCPortal): Model results of orbital forcing and solar activity during the Holocene in NetCDF format

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DOI	https://doi.org/10.1594/PANGAEA.817926
	Model results of orbital forcing and solar activity during the Holocene in NetCDF format
	Dietrich; Stephan; Werner; Martin; Spangehl; T; Lohmann; Gerrit
发布日期	2013-08-13
数据集类型	dataset
英文简介	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 d18O 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 d18O in precipitation with similar magnitudes during the mid- and late Holocene. (2) Past d18O 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 d18O 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 d18O in precipitation pattern and its relation to temperature change.
语种	英语
国家	国际
学科大类	气候变化
学科子类	气候变化
文献类型	数据集
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/234553
推荐引用方式 GB/T 7714	Dietrich,Stephan,Werner,et al. Model results of orbital forcing and solar activity during the Holocene in NetCDF format.2013-08-13.https://doi.org/10.1594/PANGAEA.817926.