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Influences of the tropical Indian and Atlantic Oceans on the predictability of ENSO
Author(s) -
Frauen Claudia,
Dommenget Dietmar
Publication year - 2012
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2011gl050520
Subject(s) - predictability , climatology , tropical atlantic , el niño southern oscillation , multivariate enso index , decoupling (probability) , environmental science , general circulation model , gcm transcription factors , teleconnection , oceanography , southern oscillation , climate change , geology , sea surface temperature , physics , control engineering , quantum mechanics , engineering
The El Niño Southern Oscillation (ENSO) is the leading mode of climate variability and predictable on interannual time scales. Recent studies suggest that the tropical Indian and Atlantic Oceans influence the dynamics and predictability of ENSO. Here we investigate these effects in a hybrid coupled model consisting of a full complexity atmospheric general circulation model (GCM) coupled to a strongly simplified linear 2‐dimensional ENSO recharge oscillator ocean model. We find that the tropical Indian and Atlantic Oceans have distinct effects on the dynamics and predictability. The decoupling of the tropical Indian Ocean has a strong impact onto ENSO dynamics, but the initial conditions of it have only a small impact on the ENSO predictability. In contrast, initial conditions of the tropical Atlantic have a stronger impact on the predictability of ENSO, but the decoupling of the tropical Atlantic has almost no effect on the ENSO dynamics.