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A condition on the average Richardson number for weak non-linearity of internal gravity waves
KTH, School of Engineering Sciences (SCI), Mechanics, Turbulence.
2007 (English)In: Tellus. Series A, Dynamic meteorology and oceanography, ISSN 0280-6495, E-ISSN 1600-0870, Vol. 59, no 5, 781-784 p.Article in journal (Refereed) Published
Abstract [en]

A condition on the average Richardson number, Ri, for weak non-linearity of an internal gravity wavefield is derived using a quasi-normal assumption. For weak non-linearity to be satisfied it is required that Ri(-1) << 0.5. This condition is very rarely satisfied in the ocean at vertical scales up to the order of 100 m, for which it is often found that Ri(-1) similar to 1. The analysis suggests that non-linear effects are of no less importance than linear effects in the dynamics of the interior of the ocean at these scales.

Place, publisher, year, edition, pages
2007. Vol. 59, no 5, 781-784 p.
Keyword [en]
time scales, shear, ocean
Identifiers
URN: urn:nbn:se:kth:diva-16968DOI: 10.1111/j.1600-0870.2007.00266.xISI: 000249664700019Scopus ID: 2-s2.0-34548723354OAI: oai:DiVA.org:kth-16968DiVA: diva2:335011
Note
QC 20100525Available from: 2010-08-05 Created: 2010-08-05 Last updated: 2017-12-12Bibliographically approved

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