Efficiency of turbulent mixing in the abyssal ocean circulation
Turbulent mixing produced by breaking of internal waves plays an important role in setting the patterns of downwelling and upwelling of deep dense waters and thereby helps sustain the global deep ocean overturning circulation. A key parameter used to characterize turbulent mixing is its efficiency,...
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| Veröffentlicht in: | Geophysical research letters 2017-06, Vol.44 (12), p.6296-6306 |
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| container_title | Geophysical research letters |
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| creator | Mashayek, A. Salehipour, H. Bouffard, D. Caulfield, C. P. Ferrari, R. Nikurashin, M. Peltier, W. R. Smyth, W. D. |
| description | Turbulent mixing produced by breaking of internal waves plays an important role in setting the patterns of downwelling and upwelling of deep dense waters and thereby helps sustain the global deep ocean overturning circulation. A key parameter used to characterize turbulent mixing is its efficiency, defined here as the fraction of the energy available to turbulence that is invested in mixing. Efficiency is conventionally approximated by a constant value near one sixth. Here we show that efficiency varies significantly in the abyssal ocean and can be as large as approximately one third in density stratified regions near topographic features. Our results indicate that variations in efficiency exert a first‐order control over the rate of overturning of the lower branch of the meridional overturning circulation.
Efficiency of turbulent mixing in the abyssal ocean is highly variable, as opposed to being considered a constant traditionally
Variations in mixing efficiency has a leading order impact on the rate of overturning of the abyssal branch of circulation
Abyssal ocean turbulence plays a leading role in regulating the ocean's role in the carbon cycle and likely other tracer budgets |
| doi_str_mv | 10.1002/2016GL072452 |
| format | Article |
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Efficiency of turbulent mixing in the abyssal ocean is highly variable, as opposed to being considered a constant traditionally
Variations in mixing efficiency has a leading order impact on the rate of overturning of the abyssal branch of circulation
Abyssal ocean turbulence plays a leading role in regulating the ocean's role in the carbon cycle and likely other tracer budgets</description><identifier>ISSN: 0094-8276</identifier><identifier>EISSN: 1944-8007</identifier><identifier>DOI: 10.1002/2016GL072452</identifier><language>eng</language><publisher>Washington: John Wiley & Sons, Inc</publisher><subject>Abyssal circulation ; Abyssal zone ; Approximation ; Circulation ; Density ; Downwelling ; Efficiency ; Energy ; Energy management ; Internal waves ; Meridional overturning circulation ; Ocean circulation ; Ocean currents ; Physiographic features ; Power efficiency ; Turbulence ; Turbulent mixing ; Upwelling ; Water circulation</subject><ispartof>Geophysical research letters, 2017-06, Vol.44 (12), p.6296-6306</ispartof><rights>2017. American Geophysical Union. All Rights Reserved.</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c410t-73026ce3ac07bc3cf4ee517a618a360e999e2d06ac7183dbd3dfe4ba1610a3e3</citedby><cites>FETCH-LOGICAL-c410t-73026ce3ac07bc3cf4ee517a618a360e999e2d06ac7183dbd3dfe4ba1610a3e3</cites><orcidid>0000-0002-2005-9718 ; 0000-0001-5505-2009 ; 0000-0002-3170-9480 ; 0000-0002-5714-8343 ; 0000-0002-5555-7661 ; 0000-0003-1895-4294 ; 0000-0002-8378-0799</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,776,780,27901,27902</link.rule.ids></links><search><creatorcontrib>Mashayek, A.</creatorcontrib><creatorcontrib>Salehipour, H.</creatorcontrib><creatorcontrib>Bouffard, D.</creatorcontrib><creatorcontrib>Caulfield, C. P.</creatorcontrib><creatorcontrib>Ferrari, R.</creatorcontrib><creatorcontrib>Nikurashin, M.</creatorcontrib><creatorcontrib>Peltier, W. R.</creatorcontrib><creatorcontrib>Smyth, W. D.</creatorcontrib><title>Efficiency of turbulent mixing in the abyssal ocean circulation</title><title>Geophysical research letters</title><description>Turbulent mixing produced by breaking of internal waves plays an important role in setting the patterns of downwelling and upwelling of deep dense waters and thereby helps sustain the global deep ocean overturning circulation. A key parameter used to characterize turbulent mixing is its efficiency, defined here as the fraction of the energy available to turbulence that is invested in mixing. Efficiency is conventionally approximated by a constant value near one sixth. Here we show that efficiency varies significantly in the abyssal ocean and can be as large as approximately one third in density stratified regions near topographic features. Our results indicate that variations in efficiency exert a first‐order control over the rate of overturning of the lower branch of the meridional overturning circulation.
Efficiency of turbulent mixing in the abyssal ocean is highly variable, as opposed to being considered a constant traditionally
Variations in mixing efficiency has a leading order impact on the rate of overturning of the abyssal branch of circulation
Abyssal ocean turbulence plays a leading role in regulating the ocean's role in the carbon cycle and likely other tracer budgets</description><subject>Abyssal circulation</subject><subject>Abyssal zone</subject><subject>Approximation</subject><subject>Circulation</subject><subject>Density</subject><subject>Downwelling</subject><subject>Efficiency</subject><subject>Energy</subject><subject>Energy management</subject><subject>Internal waves</subject><subject>Meridional overturning circulation</subject><subject>Ocean circulation</subject><subject>Ocean currents</subject><subject>Physiographic features</subject><subject>Power efficiency</subject><subject>Turbulence</subject><subject>Turbulent mixing</subject><subject>Upwelling</subject><subject>Water circulation</subject><issn>0094-8276</issn><issn>1944-8007</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2017</creationdate><recordtype>article</recordtype><recordid>eNpNkEFLAzEUhIMoWKs3f0DAq6vvJbtJcxIptQoFL70v2eyLpmyzNdkF--9dqQdPM4ePGWYYu0V4QADxKADVegNalJU4YzM0ZVksAPQ5mwGYyQutLtlVzjsAkCBxxp5W3gcXKLoj7z0fxtSMHcWB78N3iB88RD58ErfNMWfb8d6RjdyF5MbODqGP1-zC2y7TzZ_O2fZltV2-Fpv39dvyeVO4EmEotAShHEnrQDdOOl8SVaitwoWVCsgYQ6IFZZ3GhWybVraeysaiQrCS5JzdnWIPqf8aKQ_1rh9TnBprNNPOysiqmqj7E-VSn3MiXx9S2Nt0rBHq34fq_w_JH6fVWAY</recordid><startdate>20170628</startdate><enddate>20170628</enddate><creator>Mashayek, A.</creator><creator>Salehipour, H.</creator><creator>Bouffard, D.</creator><creator>Caulfield, C. 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Here we show that efficiency varies significantly in the abyssal ocean and can be as large as approximately one third in density stratified regions near topographic features. Our results indicate that variations in efficiency exert a first‐order control over the rate of overturning of the lower branch of the meridional overturning circulation.
Efficiency of turbulent mixing in the abyssal ocean is highly variable, as opposed to being considered a constant traditionally
Variations in mixing efficiency has a leading order impact on the rate of overturning of the abyssal branch of circulation
Abyssal ocean turbulence plays a leading role in regulating the ocean's role in the carbon cycle and likely other tracer budgets</abstract><cop>Washington</cop><pub>John Wiley & Sons, Inc</pub><doi>10.1002/2016GL072452</doi><tpages>11</tpages><orcidid>https://orcid.org/0000-0002-2005-9718</orcidid><orcidid>https://orcid.org/0000-0001-5505-2009</orcidid><orcidid>https://orcid.org/0000-0002-3170-9480</orcidid><orcidid>https://orcid.org/0000-0002-5714-8343</orcidid><orcidid>https://orcid.org/0000-0002-5555-7661</orcidid><orcidid>https://orcid.org/0000-0003-1895-4294</orcidid><orcidid>https://orcid.org/0000-0002-8378-0799</orcidid><oa>free_for_read</oa></addata></record> |
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| source | Wiley-Blackwell AGU Digital Library; Wiley Online Library Journals Frontfile Complete; Wiley Online Library Free Content; Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals |
| subjects | Abyssal circulation Abyssal zone Approximation Circulation Density Downwelling Efficiency Energy Energy management Internal waves Meridional overturning circulation Ocean circulation Ocean currents Physiographic features Power efficiency Turbulence Turbulent mixing Upwelling Water circulation |
| title | Efficiency of turbulent mixing in the abyssal ocean circulation |
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