Energetic Constraints on Baroclinic Eddy Heat Transport With a Beta Effect in the Laboratory
Abstract Hypotheses involving energetic constraints and the down‐gradient diffusion of heat in eddy parameterization theories are tested by estimating baroclinic eddy transports in rotating annulus laboratory experiments. Particle Imaging Velocimetry measurements are supplemented by numerical simula...
Saved in:
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2025-03-01
|
| Series: | Geophysical Research Letters |
| Subjects: | |
| Online Access: | https://doi.org/10.1029/2024GL112196 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1850187525526650880 |
|---|---|
| author | Cheng Qian Peter L. Read David P. Marshall |
| author_facet | Cheng Qian Peter L. Read David P. Marshall |
| author_sort | Cheng Qian |
| collection | DOAJ |
| description | Abstract Hypotheses involving energetic constraints and the down‐gradient diffusion of heat in eddy parameterization theories are tested by estimating baroclinic eddy transports in rotating annulus laboratory experiments. Particle Imaging Velocimetry measurements are supplemented by numerical simulations to estimate variables not measured directly. The results with a topographic beta effect broadly support Fick's first law, and are consistent with the GEOMETRIC framework in which eddy buoyancy flux is constrained by total eddy energy. With the topographic beta effect, a relatively simple relation is observed between the eddy buoyancy flux and the total eddy energy, with the ratio quantifying the eddy transport efficiency. This efficiency decreases in more complex flow regimes with larger rotation rates, associated with the changing energy partition between eddy available potential energy and eddy kinetic energy. In the absence of a topographic beta effect, more complicated dependencies are found, suggesting roles for other variables. |
| format | Article |
| id | doaj-art-4095de32d79f4ab0b649cc9181ea5555 |
| institution | OA Journals |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-4095de32d79f4ab0b649cc9181ea55552025-08-20T02:16:05ZengWileyGeophysical Research Letters0094-82761944-80072025-03-01525n/an/a10.1029/2024GL112196Energetic Constraints on Baroclinic Eddy Heat Transport With a Beta Effect in the LaboratoryCheng Qian0Peter L. Read1David P. Marshall2Department of Physics University of Oxford Oxford UKDepartment of Physics University of Oxford Oxford UKDepartment of Physics University of Oxford Oxford UKAbstract Hypotheses involving energetic constraints and the down‐gradient diffusion of heat in eddy parameterization theories are tested by estimating baroclinic eddy transports in rotating annulus laboratory experiments. Particle Imaging Velocimetry measurements are supplemented by numerical simulations to estimate variables not measured directly. The results with a topographic beta effect broadly support Fick's first law, and are consistent with the GEOMETRIC framework in which eddy buoyancy flux is constrained by total eddy energy. With the topographic beta effect, a relatively simple relation is observed between the eddy buoyancy flux and the total eddy energy, with the ratio quantifying the eddy transport efficiency. This efficiency decreases in more complex flow regimes with larger rotation rates, associated with the changing energy partition between eddy available potential energy and eddy kinetic energy. In the absence of a topographic beta effect, more complicated dependencies are found, suggesting roles for other variables.https://doi.org/10.1029/2024GL112196eddy heat transportenergetic constraintseddy parameterization |
| spellingShingle | Cheng Qian Peter L. Read David P. Marshall Energetic Constraints on Baroclinic Eddy Heat Transport With a Beta Effect in the Laboratory Geophysical Research Letters eddy heat transport energetic constraints eddy parameterization |
| title | Energetic Constraints on Baroclinic Eddy Heat Transport With a Beta Effect in the Laboratory |
| title_full | Energetic Constraints on Baroclinic Eddy Heat Transport With a Beta Effect in the Laboratory |
| title_fullStr | Energetic Constraints on Baroclinic Eddy Heat Transport With a Beta Effect in the Laboratory |
| title_full_unstemmed | Energetic Constraints on Baroclinic Eddy Heat Transport With a Beta Effect in the Laboratory |
| title_short | Energetic Constraints on Baroclinic Eddy Heat Transport With a Beta Effect in the Laboratory |
| title_sort | energetic constraints on baroclinic eddy heat transport with a beta effect in the laboratory |
| topic | eddy heat transport energetic constraints eddy parameterization |
| url | https://doi.org/10.1029/2024GL112196 |
| work_keys_str_mv | AT chengqian energeticconstraintsonbarocliniceddyheattransportwithabetaeffectinthelaboratory AT peterlread energeticconstraintsonbarocliniceddyheattransportwithabetaeffectinthelaboratory AT davidpmarshall energeticconstraintsonbarocliniceddyheattransportwithabetaeffectinthelaboratory |