Dörffel, T. and Papke, A. and Klein, R. and Smolarkiewicz, P. (2017) Intensification of tilted atmospheric vortices by asymmetric diabatic heating. SFB 1114 Preprint in arXiv:1708.07674 . pp. 122. (Unpublished)

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Official URL: https://arxiv.org/abs/1708.07674
Abstract
Päschke et al. (JFM, 701, 137{170 (2012)) studied the nonlinear dynamics of strongly tilted vortices subject to asymmetric diabatic heating by asymptotic methods. They found, i.a., that an azimuthal Fourier mode 1 heating pattern can intensify or attenuate such a vortex depending on the relative orientation of tilt and heating asymmetries. The theory originally addressed the gradient wind regime which, asymptotically speaking, corresponds to vortex Rossby numbers of order O(1) in the limit. Formally, this restricts the appicability of the theory to rather weak vortices in the near equatorial region. It is shown below that said theory is, in contrast, uniformly valid for vanishing Coriolis parameter and thus applicable to vortices up to hurricane strength. The paper's main contribution is a series of threedimensional numerical simulations which fully support the analytical predictions.
Item Type:  Article 

Subjects:  Mathematical and Computer Sciences > Mathematics > Applied Mathematics 
Divisions:  Department of Mathematics and Computer Science > Institute of Mathematics > Geophysical Fluid Dynamics Group 
ID Code:  2099 
Deposited By:  Silvia Hoemke 
Deposited On:  25 Aug 2017 12:27 
Last Modified:  19 Dec 2017 16:41 
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