Instability of horizontally and vertically sheared parallel flow
| dc.contributor.author | Ringerud, Mark A., author | |
| dc.contributor.author | Stevens, Duane E., author | |
| dc.contributor.author | Ciesielski, Paul E., author | |
| dc.date.accessioned | 2022-03-23T17:53:40Z | |
| dc.date.available | 2022-03-23T17:53:40Z | |
| dc.date.issued | 1989-06 | |
| dc.description | June 1989. | |
| dc.description | Also issued as Mark A. Ringerud's thesis (M.S.) -- Colorado State University, 1988. | |
| dc.description.abstract | This study examines the effects of various windshears on the perturbation growths within inertially unstable regions. A primary focus is determining what type of instability is preferred, symmetric or asymmetric, through the development of a two-dimensional model using the primitive equations and a jet with horizontally and vertically sheared flow. A necessary condition for inertial instability is when the basic state potential vorticity, f P < 0. The potential vorticity can be viewed as having two influences, that due to the horizontal wind shear and vertical shear. With this in mind, I examine the relationship between the shears in inertial instability. This study extends previous results where the basic state contained only horizontal shear, u(y). These results, obtained with a shallow water model, showed that asymmetric modes had larger growth rates than symmetric modes. By examining various jet profiles which contained both horizontal and vertical shear, the results in this more general case (i.e., u(y, z) again revealed that asymmetric instabilities are preferred. | |
| dc.description.sponsorship | Sponsored by the National Science Foundation under grants ATM-8305759 and ATM-8352205. | |
| dc.format.medium | reports | |
| dc.identifier.uri | https://hdl.handle.net/10217/234569 | |
| dc.language | English | |
| dc.language.iso | eng | |
| dc.publisher | Colorado State University. Libraries | |
| dc.relation | Catalog record number (MMS ID): 991023629869703361 | |
| dc.relation | QC852 .C6 no. 445 | |
| dc.relation.ispartof | Atmospheric Science Papers (Blue Books) | |
| dc.relation.ispartof | Atmospheric science paper, no. 445 | |
| dc.rights | Copyright and other restrictions may apply. User is responsible for compliance with all applicable laws. For information about copyright law, please see https://libguides.colostate.edu/copyright. | |
| dc.subject | Wind shear | |
| dc.subject | Vertical wind shear | |
| dc.subject | Dynamic meteorology -- Mathematical models | |
| dc.title | Instability of horizontally and vertically sheared parallel flow | |
| dc.type | Text | |
| dcterms.rights.dpla | This Item is protected by copyright and/or related rights (https://rightsstatements.org/vocab/InC/1.0/). You are free to use this Item in any way that is permitted by the copyright and related rights legislation that applies to your use. For other uses you need to obtain permission from the rights-holder(s). |
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