Reflection of equatorial Kelvin waves at eastern ocean boundaries Part I: hypothetical boundaries
A baroclinic shallow-water model is developed to investigate the effect of the orientation of the eastern ocean boundary on the behavior of equatorial Kelvin waves. The model is formulated in a spherical polar coordinate system and includes dissipation and non-linear terms, effects which have no...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Copernicus Publications
1999-06-01
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| Series: | Annales Geophysicae |
| Online Access: | https://www.ann-geophys.net/17/812/1999/angeo-17-812-1999.pdf |
| _version_ | 1819032858626359296 |
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| author | J. Soares I. Wainer N. C. Wells |
| author_facet | J. Soares I. Wainer N. C. Wells |
| author_sort | J. Soares |
| collection | DOAJ |
| description | A baroclinic shallow-water model is developed
to investigate the effect of the orientation of the eastern ocean boundary on
the behavior of equatorial Kelvin waves. The model is formulated in a spherical
polar coordinate system and includes dissipation and non-linear terms, effects
which have not been previously included in analytical approaches to the problem.
Both equatorial and middle latitude response are considered given the large
latitudinal extent used in the model. Baroclinic equatorial Kelvin waves of
intraseasonal, seasonal and annual periods are introduced into the domain as
pulses of finite width. Their subsequent reflection, transmission and
dissipation are investigated. It is found that dissipation is very important for
the transmission of wave energy along the boundary and for reflections from the
boundary. The dissipation was found to be dependent not only on the presence of
the coastal Kelvin waves in the domain, but also on the period of these coastal
waves. In particular the dissipation increases with wave period. It is also
shown that the equatorial <i>β</i>-plane approximation can allow an
anomalous generation of Rossby waves at higher latitudes. Nonlinearities
generally have a small effect on the solutions, within the confines of this
model.<br><br><b>Key words. </b>Oceanography: general (equatorial
oceanography; numerical modeling) · Oceanography: physical (eastern boundary
currents) |
| first_indexed | 2024-12-21T07:08:37Z |
| format | Article |
| id | doaj.art-35062fb92e9947f9a3b0b3e041f40190 |
| institution | Directory Open Access Journal |
| issn | 0992-7689 1432-0576 |
| language | English |
| last_indexed | 2024-12-21T07:08:37Z |
| publishDate | 1999-06-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Annales Geophysicae |
| spelling | doaj.art-35062fb92e9947f9a3b0b3e041f401902022-12-21T19:12:01ZengCopernicus PublicationsAnnales Geophysicae0992-76891432-05761999-06-011781282610.1007/s00585-999-0812-zReflection of equatorial Kelvin waves at eastern ocean boundaries Part I: hypothetical boundariesJ. Soares0I. Wainer1N. C. Wells2Departamento de Ciências Atmosféricas, Rua do Matão 1226, Universidade de São Paulo, SP, Brazil, 05508-900Departamento de Oceanografia Física, Praça do Oceanográfico 191, Universidade de São Paulo, SP, Brazil, 05508-900Southampton Oceanography Centre, European Way, Southampton, England, UK, SO14 3ZHA baroclinic shallow-water model is developed to investigate the effect of the orientation of the eastern ocean boundary on the behavior of equatorial Kelvin waves. The model is formulated in a spherical polar coordinate system and includes dissipation and non-linear terms, effects which have not been previously included in analytical approaches to the problem. Both equatorial and middle latitude response are considered given the large latitudinal extent used in the model. Baroclinic equatorial Kelvin waves of intraseasonal, seasonal and annual periods are introduced into the domain as pulses of finite width. Their subsequent reflection, transmission and dissipation are investigated. It is found that dissipation is very important for the transmission of wave energy along the boundary and for reflections from the boundary. The dissipation was found to be dependent not only on the presence of the coastal Kelvin waves in the domain, but also on the period of these coastal waves. In particular the dissipation increases with wave period. It is also shown that the equatorial <i>β</i>-plane approximation can allow an anomalous generation of Rossby waves at higher latitudes. Nonlinearities generally have a small effect on the solutions, within the confines of this model.<br><br><b>Key words. </b>Oceanography: general (equatorial oceanography; numerical modeling) · Oceanography: physical (eastern boundary currents)https://www.ann-geophys.net/17/812/1999/angeo-17-812-1999.pdf |
| spellingShingle | J. Soares I. Wainer N. C. Wells Reflection of equatorial Kelvin waves at eastern ocean boundaries Part I: hypothetical boundaries Annales Geophysicae |
| title | Reflection of equatorial Kelvin waves at eastern ocean boundaries Part I: hypothetical boundaries |
| title_full | Reflection of equatorial Kelvin waves at eastern ocean boundaries Part I: hypothetical boundaries |
| title_fullStr | Reflection of equatorial Kelvin waves at eastern ocean boundaries Part I: hypothetical boundaries |
| title_full_unstemmed | Reflection of equatorial Kelvin waves at eastern ocean boundaries Part I: hypothetical boundaries |
| title_short | Reflection of equatorial Kelvin waves at eastern ocean boundaries Part I: hypothetical boundaries |
| title_sort | reflection of equatorial kelvin waves at eastern ocean boundaries part i hypothetical boundaries |
| url | https://www.ann-geophys.net/17/812/1999/angeo-17-812-1999.pdf |
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