The characteristics of signal versus noise SST variability in the North Pacific and the tropical Pacific Ocean SCOPUS KCI

Title
The characteristics of signal versus noise SST variability in the North Pacific and the tropical Pacific Ocean
Author(s)
Yeh, S.-W.; Kirtman, B.P.
Publication Year
2006
Abstract
Total sea surface temperature (SST) in a coupled GCM is diagnosed by separating the variability into signal variance and noise variance. The signal and the noise is calculated from multi-decadal simulations from the COLA anomaly coupled GCM and the interactive ensemble model by assuming both simulations have a similar signal variance. The interactive ensemble model is a new coupling strategy that is designed to increase signal to noise ratio by using an ensemble of atmospheric realizations coupled to a single ocean model. The procedure for separating the signal and the noise variability presented here does not rely on any ad hoc temporal or spatial filter. Based on these simulations, we find that the signal versus the noise of SST variability in the North Pacific is significantly different from that in the equatorial Pacific. The noise SST variability explains the majority of the total variability in the North Pacific, whereas the signal dominates in the deep tropics. It is also found that the spatial characteristics of the signal and the noise are also distinct in the North Pacific and equatorial Pacific.
ISSN
1738-5261
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/4950
DOI
10.1007/BF03022401
Bibliographic Citation
Ocean Science Journal, v.41, no.1, pp.1 - 10, 2006
Subject
coupling; general circulation model; sea surface temperature; simulation; Pacific Ocean; Pacific Ocean (Equatorial); Pacific Ocean (North); Pacific Ocean (Tropical)
Keywords
Equatorial Pacific; Interactive ensemble model; North Pacific; Signal and noise; SST variability
Type
Article
Language
English
Document Type
Article
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