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dc.contributor.authorShen, Mao-Lin
dc.contributor.authorKeenlyside, Noel
dc.contributor.authorBhatt, Bhuwan Chandra
dc.contributor.authorDuane, Gregory
dc.date.accessioned2018-07-05T14:55:47Z
dc.date.available2018-07-05T14:55:47Z
dc.date.issued2017-12-29
dc.identifier.citationShen M, Keenlyside N, Bhatt BC, Duane G. Role of atmosphere-ocean interactions in supermodeling the tropical Pacific climate. Chaos. 2017;27(12)eng
dc.identifier.urihttp://hdl.handle.net/1956/17876
dc.description.abstractThe supermodel strategy interactively combines several models to outperform the individual models comprising it. A key advantage of the approach is that nonlinear improvements can be achieved, in contrast to the linear weighted combination of individual unconnected models. This property is found in a climate supermodel constructed by coupling two versions of an atmospheric model differing only in their convection scheme to a single ocean model. The ocean model receives a weighted combination of the momentum and heat fluxes. Optimal weights can produce a supermodel with a basic state similar to observations: a single Intertropical Convergence zone (ITCZ), with a western Pacific warm pool and an equatorial cold tongue. This is in stark contrast to the erroneous double ITCZ pattern simulated by both of the two stand-alone coupled models. By varying weights, we develop a conceptual scheme to explain how combining the momentum fluxes of the two different atmospheric models affects equatorial upwelling and surface wind feedback so as to give a realistic basic state in the tropical Pacific. In particular, we propose a mechanism based on the competing influences of equatorial zonal wind and off-equatorial wind stress curl in driving equatorial upwelling in the coupled models. Our results show how nonlinear ocean-atmosphere interaction is essential in combining these two effects to build different sea surface temperature structures, some of which are realistic. They also provide some insight into observed and modelled tropical Pacific climate.eng
dc.language.isoengeng
dc.publisherAIP Publishingeng
dc.relation.urihttp://aip.scitation.org/doi/pdf/10.1063/1.4990713
dc.titleRole of atmosphere-ocean interactions in supermodeling the tropical Pacific climateeng
dc.typeJournal articleeng
dc.date.updated2018-03-28T10:01:43Z
dc.rights.holderCopyright the authorseng
dc.type.versionpublishedVersioneng
bora.peerreviewedPeer reviewedeng
dc.type.documentJournal article
dc.identifier.cristinID1545181
dc.identifier.doi10.1063/1.4990713eng
dc.source.issn1054-1500eng
dc.source.issn1089-7682eng
dc.relation.projectIDNotur/NorStore: nn9385k
dc.relation.projectIDNotur/NorStore: nn9039k
dc.relation.projectIDNotur/NorStore: ns9039k
dc.relation.projectIDNotur/NorStore: nn9207k
dc.relation.projectIDEC/H2020: 648982
dc.relation.projectIDNotur/NorStore: ns9207k
dc.relation.projectIDEC/H2020: 658602
dc.relation.journalChaos


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