Authors
RM Gladstone, I Ross, PJ Valdes, A Abe‐Ouchi, P Braconnot, S Brewer, M Kageyama, A Kitoh, A Legrande, O Marti, R Ohgaito, B Otto‐Bliesner, WR Peltier, G Vettoretti
Publication date
2005/8
Journal
Geophysical Research Letters
Volume
32
Issue
16
Description
The mid‐Holocene (6000 years before present) North Atlantic Oscillation (NAO) from nine models in the Paleoclimate Modeling Intercomparison Project Phase 2 is studied, primarily through principal component analysis of winter time North Atlantic sea level pressure (SLP). Modeled mid‐Holocene NAO and mean SLP show small changes compared to pre‐industrial control runs, with a shift in mean state towards a more positive NAO regime for three of the models. Modeled NAO variability shows little change, with a small increase for some models in the fraction of time spent in the NAO‐negative phase during the mid‐Holocene. Proxy based reconstructions of the NAO indicate a more positive NAO regime compared to present day during the mid‐ Holocene. We hypothesise that there was a small NAO+ like shift in mean state during the mid‐Holocene.
Total citations
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Scholar articles
RM Gladstone, I Ross, PJ Valdes, A Abe‐Ouchi… - Geophysical Research Letters, 2005