dc.contributor.author
Dörffel, Tom
dc.contributor.author
Papke, Ariane
dc.contributor.author
Klein, Rupert
dc.contributor.author
Ernst, Natalia
dc.contributor.author
Smolarkiewicz, Piotr K.
dc.date.accessioned
2021-12-03T14:10:59Z
dc.date.available
2021-12-03T14:10:59Z
dc.identifier.uri
https://refubium.fu-berlin.de/handle/fub188/32999
dc.identifier.uri
http://dx.doi.org/10.17169/refubium-32723
dc.description.abstract
Päschke et al. (J Fluid Mech, 2012) studied the nonlinear dynamics of strongly tilted vortices subject to asymmetric diabatic heating by asymptotic methods. They found, inter alia, that an azimuthal Fourier mode 1 heating pattern can intensify or attenuate such a vortex depending on the relative orientation of the tilt and the heating asymmetries. The theory originally addressed the gradient wind regime which, asymptotically speaking, corresponds to vortex Rossby numbers of order unity in the limit. Formally, this restricts the applicability of the theory to rather weak vortices. It is shown below that said theory is, in contrast, uniformly valid for vanishing Coriolis parameter and thus applicable to vortices up to low hurricane strengths. An extended discussion of the asymptotics as regards their physical interpretation and their implications for the overall vortex dynamics is also provided in this context. The paper’s second contribution is a series of three-dimensional numerical simulations examining the effect of different orientations of dipolar diabatic heating on idealized tropical cyclones. Comparisons with numerical solutions of the asymptotic equations yield evidence that supports the original theoretical predictions of Päschke et al. In addition, the influence of asymmetric diabatic heating on the time evolution of the vortex centerline is further analyzed, and a steering mechanism that depends on the orientation of the heating dipole is revealed. Finally, the steering mechanism is traced back to the correlation of dipolar perturbations of potential temperature, induced by the vortex tilt, and vertical velocity, for which diabatic heating not necessarily needs to be responsible, but which may have other origins.
en
dc.format.extent
43 Seiten
dc.subject
Tropical cyclones
en
dc.subject
Asymptotic analysis
en
dc.subject
Idealized simulations
en
dc.subject.ddc
500 Naturwissenschaften und Mathematik::530 Physik::530 Physik
dc.title
Dynamics of tilted atmospheric vortices under asymmetric diabatic heating
dc.type
Wissenschaftlicher Artikel
dcterms.bibliographicCitation.doi
10.1007/s00162-021-00591-x
dcterms.bibliographicCitation.journaltitle
Theoretical and Computational Fluid Dynamics
dcterms.bibliographicCitation.number
6
dcterms.bibliographicCitation.pagestart
831
dcterms.bibliographicCitation.pageend
873
dcterms.bibliographicCitation.volume
35
dcterms.bibliographicCitation.url
https://doi.org/10.1007/s00162-021-00591-x
refubium.affiliation
Mathematik und Informatik
refubium.affiliation.other
Institut für Mathematik
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refubium.funding
Springer Nature DEAL
refubium.note.author
Die Publikation wurde aus Open Access Publikationsgeldern der Freien Universität Berlin gefördert.
refubium.resourceType.isindependentpub
no
dcterms.accessRights.openaire
open access
dcterms.isPartOf.eissn
1432-2250
refubium.resourceType.provider
WoS-Alert