Impact of Tidal Mixing on Water Mass Transformation and Circulation in the South China Sea
Using a high-resolution regional ocean model, the impact of tidal mixing on water mass transformation and circulation in the South China Sea (SCS) is investigated through a set of numerical experiments with different configurations of tide-induced diapycnal diffusivity. The results show that includi...
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description | Using a high-resolution regional ocean model, the impact of tidal mixing on water mass transformation and circulation in the South China Sea (SCS) is investigated through a set of numerical experiments with different configurations of tide-induced diapycnal diffusivity. The results show that including tidal mixing in both the Luzon Strait (LS) and SCS has significant impact on the LS transport and the intermediate–deep layer circulation in the SCS Basin. Analysis of the density field indicates that tidal mixing in both the LS and SCS are essential for sustaining a consistent density gradient and thus a persistent outward-directed baroclinic pressure gradient both between the western Pacific and LS and between the LS and SCS Basin, so as to maintain the strong deep-water transport through the LS. Further analysis of water mass properties suggests that tidal mixing in the deep SCS would strengthen the horizontal density gradient, intensify the basin-scale cyclonic circulation, induce more vigorous overturning, as well as generate the subbasin-scale eddies in the abyssal SCS. The results imply that tidal mixing in both the LS and SCS plays a key dynamic role in controlling water mass properties and deep circulation features in the SCS and thus need to be deliberately parameterized in ocean circulation models for this region. |
doi_str_mv | 10.1175/JPO-D-16-0171.1 |
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The results show that including tidal mixing in both the Luzon Strait (LS) and SCS has significant impact on the LS transport and the intermediate–deep layer circulation in the SCS Basin. Analysis of the density field indicates that tidal mixing in both the LS and SCS are essential for sustaining a consistent density gradient and thus a persistent outward-directed baroclinic pressure gradient both between the western Pacific and LS and between the LS and SCS Basin, so as to maintain the strong deep-water transport through the LS. Further analysis of water mass properties suggests that tidal mixing in the deep SCS would strengthen the horizontal density gradient, intensify the basin-scale cyclonic circulation, induce more vigorous overturning, as well as generate the subbasin-scale eddies in the abyssal SCS. The results imply that tidal mixing in both the LS and SCS plays a key dynamic role in controlling water mass properties and deep circulation features in the SCS and thus need to be deliberately parameterized in ocean circulation models for this region.</description><identifier>ISSN: 0022-3670</identifier><identifier>EISSN: 1520-0485</identifier><identifier>DOI: 10.1175/JPO-D-16-0171.1</identifier><language>eng</language><publisher>Boston: American Meteorological Society</publisher><subject>Abyssal zone ; Circulation ; Cyclonic circulation ; Deep layer ; Deep water ; Deep water circulation ; Density ; Density field ; Density gradients ; Eddies ; General circulation models ; High resolution ; Laboratories ; Mass ; Numerical experiments ; Ocean circulation ; Ocean circulation models ; Ocean currents ; Ocean models ; Oceanography ; Pressure gradients ; Properties ; Science ; Studies ; Tidal mixing ; Topography ; Transport ; Vortices ; Water ; Water analysis ; Water circulation ; Water mass properties ; Water mass transformation ; Water transport ; Wind</subject><ispartof>Journal of physical oceanography, 2017-02, Vol.47 (2), p.419-432</ispartof><rights>Copyright American Meteorological Society Feb 2017</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c376t-70b73d53af229e34ef52e3affa35c29a6716b0462d378fceb1cea7500063288d3</citedby><cites>FETCH-LOGICAL-c376t-70b73d53af229e34ef52e3affa35c29a6716b0462d378fceb1cea7500063288d3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,3681,27924,27925</link.rule.ids></links><search><creatorcontrib>Wang, Xiaowei</creatorcontrib><creatorcontrib>Liu, Zhiyu</creatorcontrib><creatorcontrib>Peng, Shiqiu</creatorcontrib><title>Impact of Tidal Mixing on Water Mass Transformation and Circulation in the South China Sea</title><title>Journal of physical oceanography</title><description>Using a high-resolution regional ocean model, the impact of tidal mixing on water mass transformation and circulation in the South China Sea (SCS) is investigated through a set of numerical experiments with different configurations of tide-induced diapycnal diffusivity. The results show that including tidal mixing in both the Luzon Strait (LS) and SCS has significant impact on the LS transport and the intermediate–deep layer circulation in the SCS Basin. Analysis of the density field indicates that tidal mixing in both the LS and SCS are essential for sustaining a consistent density gradient and thus a persistent outward-directed baroclinic pressure gradient both between the western Pacific and LS and between the LS and SCS Basin, so as to maintain the strong deep-water transport through the LS. Further analysis of water mass properties suggests that tidal mixing in the deep SCS would strengthen the horizontal density gradient, intensify the basin-scale cyclonic circulation, induce more vigorous overturning, as well as generate the subbasin-scale eddies in the abyssal SCS. The results imply that tidal mixing in both the LS and SCS plays a key dynamic role in controlling water mass properties and deep circulation features in the SCS and thus need to be deliberately parameterized in ocean circulation models for this region.</description><subject>Abyssal zone</subject><subject>Circulation</subject><subject>Cyclonic circulation</subject><subject>Deep layer</subject><subject>Deep water</subject><subject>Deep water circulation</subject><subject>Density</subject><subject>Density field</subject><subject>Density gradients</subject><subject>Eddies</subject><subject>General circulation models</subject><subject>High resolution</subject><subject>Laboratories</subject><subject>Mass</subject><subject>Numerical experiments</subject><subject>Ocean circulation</subject><subject>Ocean circulation models</subject><subject>Ocean currents</subject><subject>Ocean models</subject><subject>Oceanography</subject><subject>Pressure gradients</subject><subject>Properties</subject><subject>Science</subject><subject>Studies</subject><subject>Tidal mixing</subject><subject>Topography</subject><subject>Transport</subject><subject>Vortices</subject><subject>Water</subject><subject>Water analysis</subject><subject>Water circulation</subject><subject>Water mass properties</subject><subject>Water mass transformation</subject><subject>Water transport</subject><subject>Wind</subject><issn>0022-3670</issn><issn>1520-0485</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2017</creationdate><recordtype>article</recordtype><sourceid>8G5</sourceid><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>AZQEC</sourceid><sourceid>BEC</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><sourceid>GNUQQ</sourceid><sourceid>GUQSH</sourceid><sourceid>M2O</sourceid><recordid>eNotkFFLwzAUhYMoOKfPvgZ8zpabtEn7KJ3OycaETQRfwl2buIytnUkL-u_tmE-Xwz2cw_kIuQc-AtDp-PVtySYMFOOgYQQXZACp4IwnWXpJBpwLwaTS_JrcxLjjnCsQ-YB8zg5HLFvaOLr2Fe7pwv_4-os2Nf3A1ga6wBjpOmAdXRMO2Pr-g3VFCx_Kbn_Wvqbt1tJV07VbWmx9jXRl8ZZcOdxHe_d_h-T9-WldvLD5cjorHueslFq1TPONllUq0QmRW5lYlwrbK4cyLUWOSoPa8ESJSurMlXYDpUWdnhZIkWWVHJKHc-4xNN-dja3ZNV2o-0oDuUi0zJVWvWt8dpWhiTFYZ47BHzD8GuDmBND0AM3EgDIngAbkH05pYqc</recordid><startdate>20170201</startdate><enddate>20170201</enddate><creator>Wang, Xiaowei</creator><creator>Liu, Zhiyu</creator><creator>Peng, Shiqiu</creator><general>American Meteorological Society</general><scope>AAYXX</scope><scope>CITATION</scope><scope>3V.</scope><scope>7TG</scope><scope>7TN</scope><scope>7XB</scope><scope>88F</scope><scope>88I</scope><scope>8AF</scope><scope>8FE</scope><scope>8FG</scope><scope>8FK</scope><scope>8G5</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>ARAPS</scope><scope>ATCPS</scope><scope>AZQEC</scope><scope>BEC</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>BHPHI</scope><scope>BKSAR</scope><scope>CCPQU</scope><scope>DWQXO</scope><scope>F1W</scope><scope>GNUQQ</scope><scope>GUQSH</scope><scope>H96</scope><scope>HCIFZ</scope><scope>KL.</scope><scope>L.G</scope><scope>M1Q</scope><scope>M2O</scope><scope>M2P</scope><scope>MBDVC</scope><scope>P5Z</scope><scope>P62</scope><scope>PATMY</scope><scope>PCBAR</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PYCSY</scope><scope>Q9U</scope><scope>S0X</scope></search><sort><creationdate>20170201</creationdate><title>Impact of Tidal Mixing on Water Mass Transformation and Circulation in the South China Sea</title><author>Wang, Xiaowei ; Liu, Zhiyu ; Peng, Shiqiu</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c376t-70b73d53af229e34ef52e3affa35c29a6716b0462d378fceb1cea7500063288d3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2017</creationdate><topic>Abyssal zone</topic><topic>Circulation</topic><topic>Cyclonic circulation</topic><topic>Deep layer</topic><topic>Deep water</topic><topic>Deep water circulation</topic><topic>Density</topic><topic>Density field</topic><topic>Density gradients</topic><topic>Eddies</topic><topic>General circulation models</topic><topic>High resolution</topic><topic>Laboratories</topic><topic>Mass</topic><topic>Numerical experiments</topic><topic>Ocean circulation</topic><topic>Ocean circulation models</topic><topic>Ocean currents</topic><topic>Ocean models</topic><topic>Oceanography</topic><topic>Pressure gradients</topic><topic>Properties</topic><topic>Science</topic><topic>Studies</topic><topic>Tidal mixing</topic><topic>Topography</topic><topic>Transport</topic><topic>Vortices</topic><topic>Water</topic><topic>Water analysis</topic><topic>Water circulation</topic><topic>Water mass properties</topic><topic>Water mass transformation</topic><topic>Water transport</topic><topic>Wind</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Wang, Xiaowei</creatorcontrib><creatorcontrib>Liu, Zhiyu</creatorcontrib><creatorcontrib>Peng, Shiqiu</creatorcontrib><collection>CrossRef</collection><collection>ProQuest Central (Corporate)</collection><collection>Meteorological & Geoastrophysical Abstracts</collection><collection>Oceanic Abstracts</collection><collection>ProQuest Central (purchase pre-March 2016)</collection><collection>Military Database (Alumni Edition)</collection><collection>Science Database (Alumni Edition)</collection><collection>STEM Database</collection><collection>ProQuest SciTech Collection</collection><collection>ProQuest Technology Collection</collection><collection>ProQuest Central (Alumni) (purchase pre-March 2016)</collection><collection>Research Library (Alumni Edition)</collection><collection>ProQuest Central (Alumni Edition)</collection><collection>ProQuest Central UK/Ireland</collection><collection>Advanced Technologies & Aerospace Collection</collection><collection>Agricultural & Environmental Science Collection</collection><collection>ProQuest Central Essentials</collection><collection>eLibrary</collection><collection>ProQuest Central</collection><collection>Technology Collection</collection><collection>Natural Science Collection</collection><collection>Earth, Atmospheric & Aquatic Science Collection</collection><collection>ProQuest One Community College</collection><collection>ProQuest Central Korea</collection><collection>ASFA: Aquatic Sciences and Fisheries Abstracts</collection><collection>ProQuest Central Student</collection><collection>Research Library Prep</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) 2: Ocean Technology, Policy & Non-Living Resources</collection><collection>SciTech Premium Collection</collection><collection>Meteorological & Geoastrophysical Abstracts - Academic</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) Professional</collection><collection>Military Database</collection><collection>Research Library</collection><collection>Science Database</collection><collection>Research Library (Corporate)</collection><collection>Advanced Technologies & Aerospace Database</collection><collection>ProQuest Advanced Technologies & Aerospace Collection</collection><collection>Environmental Science Database</collection><collection>Earth, Atmospheric & Aquatic Science Database</collection><collection>ProQuest One Academic Eastern Edition (DO NOT USE)</collection><collection>ProQuest One Academic</collection><collection>ProQuest One Academic UKI Edition</collection><collection>Environmental Science Collection</collection><collection>ProQuest Central Basic</collection><collection>SIRS Editorial</collection><jtitle>Journal of physical oceanography</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Wang, Xiaowei</au><au>Liu, Zhiyu</au><au>Peng, Shiqiu</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Impact of Tidal Mixing on Water Mass Transformation and Circulation in the South China Sea</atitle><jtitle>Journal of physical oceanography</jtitle><date>2017-02-01</date><risdate>2017</risdate><volume>47</volume><issue>2</issue><spage>419</spage><epage>432</epage><pages>419-432</pages><issn>0022-3670</issn><eissn>1520-0485</eissn><abstract>Using a high-resolution regional ocean model, the impact of tidal mixing on water mass transformation and circulation in the South China Sea (SCS) is investigated through a set of numerical experiments with different configurations of tide-induced diapycnal diffusivity. The results show that including tidal mixing in both the Luzon Strait (LS) and SCS has significant impact on the LS transport and the intermediate–deep layer circulation in the SCS Basin. Analysis of the density field indicates that tidal mixing in both the LS and SCS are essential for sustaining a consistent density gradient and thus a persistent outward-directed baroclinic pressure gradient both between the western Pacific and LS and between the LS and SCS Basin, so as to maintain the strong deep-water transport through the LS. Further analysis of water mass properties suggests that tidal mixing in the deep SCS would strengthen the horizontal density gradient, intensify the basin-scale cyclonic circulation, induce more vigorous overturning, as well as generate the subbasin-scale eddies in the abyssal SCS. The results imply that tidal mixing in both the LS and SCS plays a key dynamic role in controlling water mass properties and deep circulation features in the SCS and thus need to be deliberately parameterized in ocean circulation models for this region.</abstract><cop>Boston</cop><pub>American Meteorological Society</pub><doi>10.1175/JPO-D-16-0171.1</doi><tpages>14</tpages><oa>free_for_read</oa></addata></record> |
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subjects | Abyssal zone Circulation Cyclonic circulation Deep layer Deep water Deep water circulation Density Density field Density gradients Eddies General circulation models High resolution Laboratories Mass Numerical experiments Ocean circulation Ocean circulation models Ocean currents Ocean models Oceanography Pressure gradients Properties Science Studies Tidal mixing Topography Transport Vortices Water Water analysis Water circulation Water mass properties Water mass transformation Water transport Wind |
title | Impact of Tidal Mixing on Water Mass Transformation and Circulation in the South China Sea |
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