Nonnormal Frontal Dynamics

DSpace/Manakin Repository

Nonnormal Frontal Dynamics

Citable link to this page

 

 
Title: Nonnormal Frontal Dynamics
Author: Feliks, Yizhak; Tziperman, Eli; Farrell, Brian F.

Note: Order does not necessarily reflect citation order of authors.

Citation: Feliks, Yizhak, Eli Tziperman, and Brian F. Farrell. 2010. “Nonnormal Frontal Dynamics.” Journal of the Atmospheric Sciences 67 (4) (April): 1218–1231. doi:10.1175/2009jas3214.1. http://dx.doi.org/10.1175/2009JAS3214.1.
Full Text & Related Files:
Abstract: The generalized stability of the secondary atmospheric circulation over strong SST fronts is studied using a hydrostatic, Boussinesq, two-dimensional f-plane model. It is shown that even in a parameter regime in which these circulations are stable to small perturbations, significant nonnormal growth of optimal initial perturbations occurs. The maximum growth factor in perturbation total energy is 250 and is dominated by the potential energy, which obtains a growth factor of 219 two to five hours after the beginning of the integration. This domination of potential energy growth is consistent with the observation that the available potential energy (APE) of the secondary circulation is larger by two orders of magnitude than the kinetic energy as well as with the transfer of kinetic to potential perturbation energy at the beginning of the growth of the perturbations. The norm kernel is found to significantly influence the structure of the optimal initial perturbation as well as the energy obtained by the mature perturbations, but the physical mechanism of growth and the structure of the mature perturbations are robust.
Published Version: doi:10.1175/2009jas3214.1
Terms of Use: This article is made available under the terms and conditions applicable to Other Posted Material, as set forth at http://nrs.harvard.edu/urn-3:HUL.InstRepos:dash.current.terms-of-use#LAA
Citable link to this page: http://nrs.harvard.edu/urn-3:HUL.InstRepos:11892263
Downloads of this work:

Show full Dublin Core record

This item appears in the following Collection(s)

 
 

Search DASH


Advanced Search
 
 

Submitters