Shortcomings of the dissipation rate for understanding the turbulent environment of plankton—And a potential solution.
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| Title: | Shortcomings of the dissipation rate for understanding the turbulent environment of plankton—And a potential solution. |
|---|---|
| Authors: | Franks, Peter J. S.1 (AUTHOR) pfranks@ucsd.edu, Inman, Bryce G.1 (AUTHOR) |
| Source: | Limnology & Oceanography. Dec2024 Supplement 1, Vol. 69, pS88-S103. 16p. |
| Subjects: | Ocean turbulence, Relative velocity, Ecosystem dynamics, Heat flux, Relative motion, Motion |
| Abstract: | Fundamental marine ecosystem dynamics such as mating, predation, and infection require individual plankton to move relative to one another. Ambient turbulence is often invoked as a mechanism to facilitate such interactions. The local intensity of turbulence is quantified as the dissipation rate of turbulent kinetic energy. While the dissipation rate is central to understanding large‐scale fluxes of heat, salt, and nutrients in the ocean, we show that it can be a poor descriptor of the turbulent environment experienced by individual plankton. A dissipation rate is a single integrated quantity representing all the complex motions in a turbulent region; the instantaneous turbulent environment of plankton may bear little resemblance to that predicted by the dissipation rate or quantities derived from it. Most importantly, the statistics (probabilities) of the relative motions of plankton in turbulence cannot be recovered from the dissipation rate or its spectrum: the probabilities of the plankton experiencing any given turbulent relative velocity are lost in the calculation. This presents a fundamental barrier to our understanding of the effects of ambient turbulence on planktonic ecosystem dynamics in the ocean. Rather than relying on dissipation rates, we show that quantifying the probability distributions of the microscale turbulent motions can provide much richer insights into the turbulent environment of individual plankton. Expanding such statistical analyses, and improving our understanding of the Lagrangian properties of ocean turbulence as experienced by plankton in the ocean will lead to significant increases in our ability to understand and quantify the effects of turbulence on plankton. [ABSTRACT FROM AUTHOR] |
| Copyright of Limnology & Oceanography is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
| FullText | Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 181948180 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Shortcomings of the dissipation rate for understanding the turbulent environment of plankton—And a potential solution. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Franks%2C+Peter+J%2E+S%2E%22">Franks, Peter J. S.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> pfranks@ucsd.edu</i><br /><searchLink fieldCode="AR" term="%22Inman%2C+Bryce+G%2E%22">Inman, Bryce G.</searchLink><relatesTo>1</relatesTo> (AUTHOR) – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Limnology+%26+Oceanography%22">Limnology & Oceanography</searchLink>. Dec2024 Supplement 1, Vol. 69, pS88-S103. 16p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Ocean+turbulence%22">Ocean turbulence</searchLink><br /><searchLink fieldCode="DE" term="%22Relative+velocity%22">Relative velocity</searchLink><br /><searchLink fieldCode="DE" term="%22Ecosystem+dynamics%22">Ecosystem dynamics</searchLink><br /><searchLink fieldCode="DE" term="%22Heat+flux%22">Heat flux</searchLink><br /><searchLink fieldCode="DE" term="%22Relative+motion%22">Relative motion</searchLink><br /><searchLink fieldCode="DE" term="%22Motion%22">Motion</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Fundamental marine ecosystem dynamics such as mating, predation, and infection require individual plankton to move relative to one another. Ambient turbulence is often invoked as a mechanism to facilitate such interactions. The local intensity of turbulence is quantified as the dissipation rate of turbulent kinetic energy. While the dissipation rate is central to understanding large‐scale fluxes of heat, salt, and nutrients in the ocean, we show that it can be a poor descriptor of the turbulent environment experienced by individual plankton. A dissipation rate is a single integrated quantity representing all the complex motions in a turbulent region; the instantaneous turbulent environment of plankton may bear little resemblance to that predicted by the dissipation rate or quantities derived from it. Most importantly, the statistics (probabilities) of the relative motions of plankton in turbulence cannot be recovered from the dissipation rate or its spectrum: the probabilities of the plankton experiencing any given turbulent relative velocity are lost in the calculation. This presents a fundamental barrier to our understanding of the effects of ambient turbulence on planktonic ecosystem dynamics in the ocean. Rather than relying on dissipation rates, we show that quantifying the probability distributions of the microscale turbulent motions can provide much richer insights into the turbulent environment of individual plankton. Expanding such statistical analyses, and improving our understanding of the Lagrangian properties of ocean turbulence as experienced by plankton in the ocean will lead to significant increases in our ability to understand and quantify the effects of turbulence on plankton. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Limnology & Oceanography is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1002/lno.12501 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 16 StartPage: S88 Subjects: – SubjectFull: Ocean turbulence Type: general – SubjectFull: Relative velocity Type: general – SubjectFull: Ecosystem dynamics Type: general – SubjectFull: Heat flux Type: general – SubjectFull: Relative motion Type: general – SubjectFull: Motion Type: general Titles: – TitleFull: Shortcomings of the dissipation rate for understanding the turbulent environment of plankton—And a potential solution. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Franks, Peter J. S. – PersonEntity: Name: NameFull: Inman, Bryce G. IsPartOfRelationships: – BibEntity: Dates: – D: 02 M: 12 Text: Dec2024 Supplement 1 Type: published Y: 2024 Identifiers: – Type: issn-print Value: 00243590 Numbering: – Type: volume Value: 69 Titles: – TitleFull: Limnology & Oceanography Type: main |
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