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          Institute: MPI für Meteorologie     Collection: Ocean in the Earth System     Display Documents



ID: 423505.0, MPI für Meteorologie / Ocean in the Earth System
Is the observed NAO variability during the instrumental record unusual?
Authors:Semenov, V. A.; Latif, M.; Jungclaus, J. H.; Park, W.
Language:English
Date of Publication (YYYY-MM-DD):2008-06
Title of Journal:Geophysical Research Letters
Journal Abbrev.:Geophys. Res. Letts.
Volume:35
Sequence Number of Article:L11701
Review Status:not specified
Audience:Not Specified
Abstract / Description:Observed multidecadal variability (30 yr running means, trends, and moving standard deviations) of the North Atlantic Oscillation (NAO) during the instrumental record is compared to that simulated by two different coupled general circulation models in extended-range control experiments. Simulated NAO exhibits strong low frequency fluctuations, even on multi-centennial time scale. Observed multi-decadal NAO variations agree well with the model variability. Trend probability distribution functions, observed and simulated, were not found to be different with statistical significance. Thus, multi-decadal NAO changes similar to those observed during the instrumental record, including the recent increase in 1965-1995, may be internally generated within the coupled atmosphere-ocean system without considering external forcing.
External Publication Status:published
Document Type:Article
Communicated by:Carola Kauhs
Affiliations:MPI für Meteorologie/Ocean in the Earth System
Identifiers:DOI:10.1029/2008GL033273
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