Eddy transport with a beta effect: a joint experimental and numerical study
This study investigates eddy heat transport in a differentially heated and rotating annulus. The parameterization of eddy transports of heat and materially conserved tracers in oceans and some planetary atmospheres is essential to model the climates of these systems. To study eddy transports quantit...
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| Format: | Thesis |
| Language: | English |
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2024
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| _version_ | 1824458619401273344 |
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| author | Qian, C |
| author_facet | Qian, C |
| author_sort | Qian, C |
| collection | OXFORD |
| description | This study investigates eddy heat transport in a differentially heated and rotating annulus. The parameterization of eddy transports of heat and materially conserved tracers in oceans and some planetary atmospheres is essential to model the climates of these systems. To study eddy transports quantitatively using numerical global climate models requires computational resolutions with relatively high costs. As an alternative approach, laboratory experiments can be used to measure the properties of baroclinic instability which is dynamically similar to those found in atmospheres and oceans. In this study, laboratory experiments are combined with numerical simulations to study the scaling of the eddy heat transport. The study investigates the impact of a beta effect on eddy transport by concurrent measurements of calorimetry and particle image velocimetry, with an innovative application to test the impact of a beta effect on the generalized Fickian assumption for the down-gradient diffusion of tracers and energetic constraints of eddy parameterization theories. Annulus measurements in the f-plane configuration do not support the assumption of down-gradient diffusion of temperature and this result is consistent with past simulation studies. The hypotheses of energetic constraints in the GEOMETRIC parameterization theory are not rejected but the data distribution is not as approximately linear as the tests with a beta effect. The measurements with a topographic beta effect are more consistent with a generalized Fickian assumption as well as the energetic constraints theory, which imply the support for its application towards eddy closure for climate studies. |
| first_indexed | 2025-02-19T04:28:46Z |
| format | Thesis |
| id | oxford-uuid:ae6ac25b-5e39-498a-8b99-05d31ee08482 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2025-02-19T04:28:46Z |
| publishDate | 2024 |
| record_format | dspace |
| spelling | oxford-uuid:ae6ac25b-5e39-498a-8b99-05d31ee084822024-12-09T16:28:58ZEddy transport with a beta effect: a joint experimental and numerical studyThesishttp://purl.org/coar/resource_type/c_db06uuid:ae6ac25b-5e39-498a-8b99-05d31ee08482EnglishHyrax Deposit2024Qian, CThis study investigates eddy heat transport in a differentially heated and rotating annulus. The parameterization of eddy transports of heat and materially conserved tracers in oceans and some planetary atmospheres is essential to model the climates of these systems. To study eddy transports quantitatively using numerical global climate models requires computational resolutions with relatively high costs. As an alternative approach, laboratory experiments can be used to measure the properties of baroclinic instability which is dynamically similar to those found in atmospheres and oceans. In this study, laboratory experiments are combined with numerical simulations to study the scaling of the eddy heat transport. The study investigates the impact of a beta effect on eddy transport by concurrent measurements of calorimetry and particle image velocimetry, with an innovative application to test the impact of a beta effect on the generalized Fickian assumption for the down-gradient diffusion of tracers and energetic constraints of eddy parameterization theories. Annulus measurements in the f-plane configuration do not support the assumption of down-gradient diffusion of temperature and this result is consistent with past simulation studies. The hypotheses of energetic constraints in the GEOMETRIC parameterization theory are not rejected but the data distribution is not as approximately linear as the tests with a beta effect. The measurements with a topographic beta effect are more consistent with a generalized Fickian assumption as well as the energetic constraints theory, which imply the support for its application towards eddy closure for climate studies. |
| spellingShingle | Qian, C Eddy transport with a beta effect: a joint experimental and numerical study |
| title | Eddy transport with a beta effect: a joint experimental and numerical study |
| title_full | Eddy transport with a beta effect: a joint experimental and numerical study |
| title_fullStr | Eddy transport with a beta effect: a joint experimental and numerical study |
| title_full_unstemmed | Eddy transport with a beta effect: a joint experimental and numerical study |
| title_short | Eddy transport with a beta effect: a joint experimental and numerical study |
| title_sort | eddy transport with a beta effect a joint experimental and numerical study |
| work_keys_str_mv | AT qianc eddytransportwithabetaeffectajointexperimentalandnumericalstudy |