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



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ID: 377794.0, MPI für Meteorologie / Ocean in the Earth System
Observed decadal tropical Pacific-North Atlantic teleconnections
Authors:Mueller, W.; Frankignoul, C.; Chouaib, N.
Language:English
Date of Publication (YYYY-MM-DD):2008
Title of Journal:Geophysical Research Letters
Journal Abbrev.:Geophys. Res. Letts.
Volume:35
Sequence Number of Article:L24810
Review Status:Peer-review
Audience:Not Specified
Abstract / Description:Observations of the last century are considered to investigate the decadal scale Pacific/North Atlantic teleconnections. By using wavelet analysis we find a significant low-frequency coherency between major indices of climate variability. In particular, at periods between 10 and 20 yr, the North Atlantic Oscillation (NAO) tends to be out of phase with the El Nino/Southern Oscillation (ENSO) (strong Icelandic low during La Nina) and the Pacific Decadal Oscillation (PDO), but in phase with the North Pacific Index (NPI). Hence, the Icelandic low is strong during La Nina, but the Aleutian low is weak. The band-pass SST pattern shows a close relationship between the "decadal-ENSO'' mode in the Pacific and the sea surface temperature anomaly tripole in the Atlantic, consistent with the low-frequency global teleconnections. The spatial sea level patterns corresponding to the band-pass filtered indices suggest that the Aleutian-Icelandic Low seesaw is a main interbasin link on decadal time scale, consistent with the larger coherency of the NPI with the NAO than with ENSO.
External Publication Status:published
Document Type:Article
Communicated by:Carola Kauhs
Affiliations:MPI für Meteorologie/Ocean in the Earth System
Identifiers:DOI:10.1029/2008GL035901
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