Model results of orbital forcing and solar activity during the Holocene in NetCDF format

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.

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Dietrich, Stephan, Werner, Martin, Spangehl, T, Lohmann, Gerrit (2013). Dataset: Model results of orbital forcing and solar activity during the Holocene in NetCDF format. https://doi.org/10.1594/PANGAEA.817926

DOI retrieved: 2013

Additional Info

Field Value
Imported on November 30, 2024
Last update November 30, 2024
License CC-BY-3.0
Source https://doi.org/10.1594/PANGAEA.817926
Author Dietrich, Stephan
Given Name Stephan
Family Name Dietrich
More Authors
Werner, Martin
Spangehl, T
Lohmann, Gerrit
Source Creation 2013
Publication Year 2013
Resource Type application/zip - filename: Dietrich_2013
Subject Areas
Name: Atmosphere

Name: Lithosphere

Related Identifiers
Title: Influence of orbital forcing and solar activity on water isotopes in precipitation during the mid- and late Holocene
Identifier: https://doi.org/10.5194/cp-9-13-2013
Type: DOI
Relation: IsSupplementTo
Year: 2013
Source: Climate of the Past
Authors: Dietrich Stephan , Werner Martin , Spangehl T , Lohmann Gerrit .