Influence of orbital forcing and solar activity on water isotopes in precipitation during the mid and late Holocene


Contact
Stephan.Dietrich [ at ] awi.de

Abstract

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. Our 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. From our findings we conclude that the Holocene variability of δ18O in precipitation, as stored in many paleoclimate archives, is rather complex to understand since the combined effect of different external forcings on δ18O in precipitation is non-linear.



Item Type
Article
Authors
Divisions
Programs
Publication Status
Published
Eprint ID
31306
DOI 10.5194/cp-9-13-2013

Cite as
Dietrich, S. , Werner, M. , Spangehl, T. and Lohmann, G. (2013): Influence of orbital forcing and solar activity on water isotopes in precipitation during the mid and late Holocene , Climate of the Past, 9 , pp. 13-26 . doi: 10.5194/cp-9-13-2013


Download
[thumbnail of cp-9-13-2013.pdf]
Preview
PDF
cp-9-13-2013.pdf

Download (4MB) | Preview
Cite this document as:

Share
Add to AnyAdd to TwitterAdd to FacebookAdd to LinkedinAdd to PinterestAdd to Email


Citation

Research Platforms
N/A

Campaigns
N/A


Actions
Edit Item Edit Item