Multi-scale waves in sound-proof global simulations with EULAG
Multi-scale waves in sound-proof global simulations with EULAG
dc.contributor.author | Prusa, Joseph | |
dc.contributor.author | Gutowski, William | |
dc.contributor.author | Gutowski, William | |
dc.contributor.department | Geological and Atmospheric Sciences | |
dc.date | 2018-02-18T00:35:01.000 | |
dc.date.accessioned | 2020-06-30T04:03:14Z | |
dc.date.available | 2020-06-30T04:03:14Z | |
dc.date.copyright | Sun Jan 01 00:00:00 UTC 2012 | |
dc.date.issued | 2011-12-01 | |
dc.description.abstract | <p>EULAG is a computational model for simulating flows across a wide range of scales and physical scenarios. A standard option employs an anelastic approximation to capture nonhydrostatic effects and simultaneously filter sound waves from the solution. In this study, we examine a localized gravity wave packet generated by instabilities in Held-Suarez climates. Although still simplified versus the Earth’s atmosphere, a rich set of planetary wave instabilities and ensuing radiated gravity waves can arise. Wave packets are observed that have lifetimes ≤ 2 days, are negligibly impacted by Coriolis force, and do not show the rotational effects of differential jet advection typical of inertia-gravity waves. Linear modal analysis shows that wavelength, period, and phase speed fit the dispersion equation to within a mean difference of ∼ 4%, suggesting an excellent fit. However, the group velocities match poorly even though a propagation of uncertainty analysis indicates that they should be predicted as well as the phase velocities. Theoretical arguments suggest the discrepancy is due to nonlinearity — a strong southerly flow leads to a critical surface forming to the southwest of the wave packet that prevents the expected propagation.</p> | |
dc.description.comments | <p>This article is from Acta Geophysica. Volume 59, Issue 6, Pages 1135–1157, ISSN (Online) 1895-7455, ISSN (Print) 1895-6572, DOI: <a href="http://dx.doi.org/10.2478/s11600-011-0050-0">10.2478/s11600-011-0050-0</a>, October 2011 </p> | |
dc.format.mimetype | application/pdf | |
dc.identifier | archive/lib.dr.iastate.edu/ge_at_pubs/127/ | |
dc.identifier.articleid | 1127 | |
dc.identifier.contextkey | 9349849 | |
dc.identifier.s3bucket | isulib-bepress-aws-west | |
dc.identifier.submissionpath | ge_at_pubs/127 | |
dc.identifier.uri | https://dr.lib.iastate.edu/handle/20.500.12876/38056 | |
dc.language.iso | en | |
dc.source.bitstream | archive/lib.dr.iastate.edu/ge_at_pubs/127/2011_Prusa_MultiScaleWaves.pdf|||Fri Jan 14 19:27:56 UTC 2022 | |
dc.source.uri | 10.2478/s11600-011-0050-0 | |
dc.subject.disciplines | Climate | |
dc.subject.keywords | anelastic; gravity waves; baroclinic instability | |
dc.title | Multi-scale waves in sound-proof global simulations with EULAG | |
dc.type | article | |
dc.type.genre | article | |
dspace.entity.type | Publication | |
relation.isAuthorOfPublication | a9f30fc3-02dd-4a1a-82e7-516c277638f5 | |
relation.isOrgUnitOfPublication | 29272786-4c4a-4d63-98d6-e7b6d6730c45 |
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