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dc.contributor.authorCrowe, MN
dc.contributor.authorTaylor, JR
dc.date.accessioned2018-11-14T00:30:50Z
dc.date.available2018-11-14T00:30:50Z
dc.date.issued2018-09-10
dc.identifier.issn0022-1120
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/285032
dc.description.abstract<jats:p>Here, we examine the influence of small-scale turbulence on the evolution of fronts in the ocean and atmosphere. Specifically, we consider the evolution of an initially balanced density front subject to an imposed viscosity and diffusivity as a simple analogue for small-scale turbulence. At late times, the dominant balance is found to be the quasisteady turbulent thermal wind balance with time evolution due to an advection–diffusion balance in the buoyancy equation. We use the leading-order balance to determine analytical similarity solutions for the spreading of a front and find that the spreading rate is maximum for an intermediate value of the Ekman number, with the spreading resulting from shear dispersion associated with the cross-front flow and vertical diffusion of density. In response to shear dispersion, the front evolves towards a density profile that is nearly linear in the cross-front coordinate. At the edges of the frontal zone, the density field develops large curvature, and these regions are associated with narrow bands of intense vertical velocity.</jats:p>
dc.publisherCambridge University Press (CUP)
dc.titleThe evolution of a front in turbulent thermal wind balance. Part 1. Theory
dc.typeArticle
prism.endingPage211
prism.publicationDate2018
prism.publicationNameJournal of Fluid Mechanics
prism.startingPage179
prism.volume850
dc.identifier.doi10.17863/CAM.32402
dcterms.dateAccepted2018-05-16
rioxxterms.versionofrecord10.1017/jfm.2018.448
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserved
rioxxterms.licenseref.startdate2018-09-10
dc.contributor.orcidTaylor, John [0000-0002-1292-3756]
dc.identifier.eissn1469-7645
rioxxterms.typeJournal Article/Review
cam.issuedOnline2018-07-04
rioxxterms.freetoread.startdate2019-09-10


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