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Decadal Variability Of The Meridional Geostrophic Transport In The Upper Tropical North Pacific Ocean

Title: Decadal Variability Of The Meridional Geostrophic Transport In The Upper Tropical North Pacific Ocean.
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Name(s): Zhou, Hui, author
Yuan, Dongliang, author
Yang, Lina, author
Li, Xiang, author
Dewar, William, author
Type of Resource: text
Genre: Journal Article
Text
Journal Article
Date Issued: 2018-08-01
Physical Form: computer
online resource
Extent: 1 online resource
Language(s): English
Abstract/Description: The meridional geostrophic transport (MGT) in the interior tropical North Pacific Ocean is estimated based on global ocean heat and salt content data. The decadal variations of the zonally and vertically integrated MGT in the tropical North Pacific Ocean are found to precede the Pacific decadal oscillation (PDO) by 1-3 years. The dynamics of the MGT are analyzed based on Sverdrup theory. It is found that the total meridional transport variability (MGT plus Ekman) is dominated by the MGT variability having positive correlations with the PDO index. The Sverdrup transports differ from the total meridional transport significantly and have insignificant correlations with PDO index, suggesting that the MGT variability is not controlled by the Sverdrup dynamics. In comparison, the simulated meridional transport variability in the models from phase 5 of the Coupled Model Intercomparison Project (CMIP5) and the Ocean General Circulation Model for the Earth Simulator are dominated by the Sverdrup transports, having insignificant correlations with the simulated PDO indices. The comparison suggests that the non-Sverdrup component in the MGT is important for the predictability of PDO and that significant deficiencies exist in these models in simulating a realistic structure of the tropical ocean gyre variability and predicting the decadal climate variations associated with it.
Identifier: FSU_libsubv1_wos_000438848800007 (IID), 10.1175/JCLI-D-17-0639.1 (DOI)
Keywords: dynamics, field, climate variability, sea-surface temperature, oscillation, argo profiles, current system, equatorial current, sverdrup
Publication Note: The publisher’s version of record is available at https://doi.org/10.1175/JCLI-D-17-0639.1
Persistent Link to This Record: http://purl.flvc.org/fsu/fd/FSU_libsubv1_wos_000438848800007
Owner Institution: FSU
Is Part Of: Journal of Climate.
0894-8755
Issue: iss. 15, vol. 31

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Zhou, H., Yuan, D., Yang, L., Li, X., & Dewar, W. (2018). Decadal Variability Of The Meridional Geostrophic Transport In The Upper Tropical North Pacific Ocean. Journal Of Climate. Retrieved from http://purl.flvc.org/fsu/fd/FSU_libsubv1_wos_000438848800007