Doppler-shifted inertial oscillations on a beta plane
On the spherical earth, and in the absence of a background flow, the poleward propagation of near-inertial oscillations is restricted by the turning latitude. A background flow, on the other hand, provides a way to increase the apparent frequency of near-inertial waves through Doppler shifting. In t...
| Váldodahkkit: | , , |
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| Materiálatiipa: | Journal article |
| Giella: | English |
| Almmustuhtton: |
2005
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| _version_ | 1826281639337000960 |
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| author | Zhai, X Greatbatch, R Sheng, J |
| author_facet | Zhai, X Greatbatch, R Sheng, J |
| author_sort | Zhai, X |
| collection | OXFORD |
| description | On the spherical earth, and in the absence of a background flow, the poleward propagation of near-inertial oscillations is restricted by the turning latitude. A background flow, on the other hand, provides a way to increase the apparent frequency of near-inertial waves through Doppler shifting. In this note, it is shown that near-inertial oscillations can be advected to latitudes higher than their turning latitude. Associated with the poleward advection there is a squeezing of the meridional wavelength. A numerical model is used to verify this result. The squeezed inertial oscillations are vulnerable to nonlinear interactions, which could eventually lead to small-scale dissipation and mixing. © 2005 American Meteorological Society. |
| first_indexed | 2024-03-07T00:31:49Z |
| format | Journal article |
| id | oxford-uuid:801201c6-c934-44f2-b19b-5a2edcefc60b |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T00:31:49Z |
| publishDate | 2005 |
| record_format | dspace |
| spelling | oxford-uuid:801201c6-c934-44f2-b19b-5a2edcefc60b2022-03-26T21:20:57ZDoppler-shifted inertial oscillations on a beta planeJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:801201c6-c934-44f2-b19b-5a2edcefc60bEnglishSymplectic Elements at Oxford2005Zhai, XGreatbatch, RSheng, JOn the spherical earth, and in the absence of a background flow, the poleward propagation of near-inertial oscillations is restricted by the turning latitude. A background flow, on the other hand, provides a way to increase the apparent frequency of near-inertial waves through Doppler shifting. In this note, it is shown that near-inertial oscillations can be advected to latitudes higher than their turning latitude. Associated with the poleward advection there is a squeezing of the meridional wavelength. A numerical model is used to verify this result. The squeezed inertial oscillations are vulnerable to nonlinear interactions, which could eventually lead to small-scale dissipation and mixing. © 2005 American Meteorological Society. |
| spellingShingle | Zhai, X Greatbatch, R Sheng, J Doppler-shifted inertial oscillations on a beta plane |
| title | Doppler-shifted inertial oscillations on a beta plane |
| title_full | Doppler-shifted inertial oscillations on a beta plane |
| title_fullStr | Doppler-shifted inertial oscillations on a beta plane |
| title_full_unstemmed | Doppler-shifted inertial oscillations on a beta plane |
| title_short | Doppler-shifted inertial oscillations on a beta plane |
| title_sort | doppler shifted inertial oscillations on a beta plane |
| work_keys_str_mv | AT zhaix dopplershiftedinertialoscillationsonabetaplane AT greatbatchr dopplershiftedinertialoscillationsonabetaplane AT shengj dopplershiftedinertialoscillationsonabetaplane |