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Detecting changes at the leading edge of an interface between oceanic water layers
Many physical phenomena in the ocean involve interactions between water masses of different temperatures and salinities at boundaries. Of particular interest is the characterisation of finescale structure at the marginal interaction zones of these boundaries, where the structure is either destroyed...
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| Published in: | Nature communications 2019-10, Vol.10 (1), p.4674-8, Article 4674 |
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| creator | Tang, Qunshu Tong, Vincent C. H. Hobbs, Richard W. Morales Maqueda, Miguel Ángel |
| description | Many physical phenomena in the ocean involve interactions between water masses of different temperatures and salinities at boundaries. Of particular interest is the characterisation of finescale structure at the marginal interaction zones of these boundaries, where the structure is either destroyed by mixing or formed by stratification. Using high-resolution seismic reflection imaging, we present observations of temporal changes at the leading edge of an interface between sub-thermocline layers in the Panama Basin. By studying time-lapse images of a seismic reflector between two water boundaries with subtle differences, we provide empirical constraints on how stratified layers evolve. The leading edge of this reflector, which is characterised by a gradual lateral decrease in vertical temperature contrast (
∣
Δ
T
∣
), increases in length over ~3 days coupled with an increase in
∣
Δ
T
∣
. A critical mixing state, in which turbulent diffusion is gradually replaced by double-diffusion as the dominant mixing process, is thus revealed.
The marginal interaction zones of oceans are understudied. Here, the authors analyse seismic observations of temporal changes at the interface between thermocline layers in the Panama Basin, that reveal a critical mixing state in which turbulent diffusion is gradually replaced by double-diffusion as the dominant mixing process. |
| doi_str_mv | 10.1038/s41467-019-12621-8 |
| format | article |
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∣
Δ
T
∣
), increases in length over ~3 days coupled with an increase in
∣
Δ
T
∣
. A critical mixing state, in which turbulent diffusion is gradually replaced by double-diffusion as the dominant mixing process, is thus revealed.
The marginal interaction zones of oceans are understudied. Here, the authors analyse seismic observations of temporal changes at the interface between thermocline layers in the Panama Basin, that reveal a critical mixing state in which turbulent diffusion is gradually replaced by double-diffusion as the dominant mixing process.</description><identifier>ISSN: 2041-1723</identifier><identifier>EISSN: 2041-1723</identifier><identifier>DOI: 10.1038/s41467-019-12621-8</identifier><identifier>PMID: 31611557</identifier><language>eng</language><publisher>London: Nature Publishing Group UK</publisher><subject>704/829 ; 704/829/2737 ; Basins ; Boundaries ; Change detection ; Earth science ; Eddy diffusion ; Humanities and Social Sciences ; Image resolution ; Interfaces ; multidisciplinary ; Physical properties ; Science ; Science (multidisciplinary) ; Seismic surveys ; Stratigraphy ; Temperature ; Thermocline ; Turbulent diffusion ; Water masses</subject><ispartof>Nature communications, 2019-10, Vol.10 (1), p.4674-8, Article 4674</ispartof><rights>The Author(s) 2019</rights><rights>2019. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c540t-595eb84a81e0a8fe0ea05cbe11ebbe02f4dc8f0802f54901c4f2c749af4494593</citedby><cites>FETCH-LOGICAL-c540t-595eb84a81e0a8fe0ea05cbe11ebbe02f4dc8f0802f54901c4f2c749af4494593</cites><orcidid>0000-0002-9009-3807 ; 0000-0001-5131-9239</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://www.proquest.com/docview/2305536465/fulltextPDF?pq-origsite=primo$$EPDF$$P50$$Gproquest$$Hfree_for_read</linktopdf><linktohtml>$$Uhttps://www.proquest.com/docview/2305536465?pq-origsite=primo$$EHTML$$P50$$Gproquest$$Hfree_for_read</linktohtml><link.rule.ids>230,314,727,780,784,885,25753,27924,27925,37012,37013,44590,53791,53793,75126</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/31611557$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Tang, Qunshu</creatorcontrib><creatorcontrib>Tong, Vincent C. H.</creatorcontrib><creatorcontrib>Hobbs, Richard W.</creatorcontrib><creatorcontrib>Morales Maqueda, Miguel Ángel</creatorcontrib><title>Detecting changes at the leading edge of an interface between oceanic water layers</title><title>Nature communications</title><addtitle>Nat Commun</addtitle><addtitle>Nat Commun</addtitle><description>Many physical phenomena in the ocean involve interactions between water masses of different temperatures and salinities at boundaries. Of particular interest is the characterisation of finescale structure at the marginal interaction zones of these boundaries, where the structure is either destroyed by mixing or formed by stratification. Using high-resolution seismic reflection imaging, we present observations of temporal changes at the leading edge of an interface between sub-thermocline layers in the Panama Basin. By studying time-lapse images of a seismic reflector between two water boundaries with subtle differences, we provide empirical constraints on how stratified layers evolve. The leading edge of this reflector, which is characterised by a gradual lateral decrease in vertical temperature contrast (
∣
Δ
T
∣
), increases in length over ~3 days coupled with an increase in
∣
Δ
T
∣
. A critical mixing state, in which turbulent diffusion is gradually replaced by double-diffusion as the dominant mixing process, is thus revealed.
The marginal interaction zones of oceans are understudied. 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H.</au><au>Hobbs, Richard W.</au><au>Morales Maqueda, Miguel Ángel</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Detecting changes at the leading edge of an interface between oceanic water layers</atitle><jtitle>Nature communications</jtitle><stitle>Nat Commun</stitle><addtitle>Nat Commun</addtitle><date>2019-10-14</date><risdate>2019</risdate><volume>10</volume><issue>1</issue><spage>4674</spage><epage>8</epage><pages>4674-8</pages><artnum>4674</artnum><issn>2041-1723</issn><eissn>2041-1723</eissn><abstract>Many physical phenomena in the ocean involve interactions between water masses of different temperatures and salinities at boundaries. Of particular interest is the characterisation of finescale structure at the marginal interaction zones of these boundaries, where the structure is either destroyed by mixing or formed by stratification. Using high-resolution seismic reflection imaging, we present observations of temporal changes at the leading edge of an interface between sub-thermocline layers in the Panama Basin. By studying time-lapse images of a seismic reflector between two water boundaries with subtle differences, we provide empirical constraints on how stratified layers evolve. The leading edge of this reflector, which is characterised by a gradual lateral decrease in vertical temperature contrast (
∣
Δ
T
∣
), increases in length over ~3 days coupled with an increase in
∣
Δ
T
∣
. A critical mixing state, in which turbulent diffusion is gradually replaced by double-diffusion as the dominant mixing process, is thus revealed.
The marginal interaction zones of oceans are understudied. Here, the authors analyse seismic observations of temporal changes at the interface between thermocline layers in the Panama Basin, that reveal a critical mixing state in which turbulent diffusion is gradually replaced by double-diffusion as the dominant mixing process.</abstract><cop>London</cop><pub>Nature Publishing Group UK</pub><pmid>31611557</pmid><doi>10.1038/s41467-019-12621-8</doi><tpages>8</tpages><orcidid>https://orcid.org/0000-0002-9009-3807</orcidid><orcidid>https://orcid.org/0000-0001-5131-9239</orcidid><oa>free_for_read</oa></addata></record> |
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| subjects | 704/829 704/829/2737 Basins Boundaries Change detection Earth science Eddy diffusion Humanities and Social Sciences Image resolution Interfaces multidisciplinary Physical properties Science Science (multidisciplinary) Seismic surveys Stratigraphy Temperature Thermocline Turbulent diffusion Water masses |
| title | Detecting changes at the leading edge of an interface between oceanic water layers |
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