The Characteristics of Signal versus Noise SST Variability in the North Pacific and the Tropical Pacific Ocean
- Authors
- Yeh, Sang-Wook; Kirtman, Ben P.
- Issue Date
- Mar-2006
- Publisher
- 한국해양과학기술원
- Keywords
- North Pacific; Equatorial Pacific; signal and noise; interactive ensemble model; SST variability
- Citation
- Ocean Science Journal, v.41, no.1, pp.1 - 10
- Indexed
- SCOPUS
KCI
- Journal Title
- Ocean Science Journal
- Volume
- 41
- Number
- 1
- Start Page
- 1
- End Page
- 10
- URI
- https://scholarworks.bwise.kr/erica/handle/2021.sw.erica/45002
- DOI
- 10.1007/BF03022401
- ISSN
- 1738-5261
- 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.
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Collections - COLLEGE OF SCIENCE AND CONVERGENCE TECHNOLOGY > DEPARTMENT OF MARINE SCIENCE AND CONVERGENCE ENGINEERING > 1. Journal Articles
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