Multi-centennial Holocene climate variability in proxy records and transient model simulations

Variability on centennial to multi-centennial timescales is mentioned as a feature in reconstructions of the Holocene climate. As more long transient model simulations with complex climate models become available and efforts have been made compile large proxy databases, there now unique opportunity study variability greater detail amount data than earlier. This paper presents spectral analysis from 9 120 records find common signals related oscillation periods geographic dependencies discuss implications for potential driving mechanisms. Multi-centennial significant most records, dominant around 120–130 years an average 240 years. Spectra model-based global mean temperature (GMT) agree well evidence all 120–150 It indicates comparatively good agreement between data. A lack latitudinal terms period found both However, highest density distributed over Northern hemisphere high latitudes, which could indicate particular sensitivity or mechanisms this region. Five also differentiated forcings various combinations forcing agents. Significant 100 200 scenarios, including those only orbital forcing. The different induce some system. Yet, none appear be predominant driver based analysis. Solar irradiance has hypothesized primary variability. without shown results then that internal operate timescales, North Atlantic-Arctic region interest aspect.