Water Mass Transformation and Overturning Circulation in the Arabian Gulf
We diagnose the ocean’s residual overturning circulation of the Arabian Gulf in a high-resolution model and interpret it in terms of water-mass transformation processes mediated by air–sea buoyancy fluxes and interior mixing. We attempt to rationalize the complex three-dimensional flow in terms of t...
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Veröffentlicht in: | Journal of physical oceanography 2021-11, Vol.51 (11), p.3513-3527 |
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creator | Al-Shehhi, Maryam R. Song, Hajoon Scott, Jeffery Marshall, John |
description | We diagnose the ocean’s residual overturning circulation of the Arabian Gulf in a high-resolution model and interpret it in terms of water-mass transformation processes mediated by air–sea buoyancy fluxes and interior mixing. We attempt to rationalize the complex three-dimensional flow in terms of the superposition of a zonal (roughly along axis) and meridional (transverse) overturning pattern. Rates of overturning and the seasonal cycle of air–sea fluxes sustaining them are quantified and ranked in order of importance. Air–sea fluxes dominate the budget so that, at zero order, the magnitude and sense of the overturning circulation can be inferred from air–sea fluxes, with interior mixing playing a lesser role. We find that wintertime latent heat fluxes dominate the water-mass transformation rate in the interior waters of the Gulf leading to a diapycnal volume flux directed toward higher densities. In the zonal overturning cell, fluid is drawn in from the Sea of Oman through the Strait of Hormuz, transformed, and exits the Strait near the southern and bottom boundaries. Along the southern margin of the Gulf, evaporation plays an important role in the meridional overturning pattern inducing sinking there. |
doi_str_mv | 10.1175/JPO-D-20-0249.1 |
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We attempt to rationalize the complex three-dimensional flow in terms of the superposition of a zonal (roughly along axis) and meridional (transverse) overturning pattern. Rates of overturning and the seasonal cycle of air–sea fluxes sustaining them are quantified and ranked in order of importance. Air–sea fluxes dominate the budget so that, at zero order, the magnitude and sense of the overturning circulation can be inferred from air–sea fluxes, with interior mixing playing a lesser role. We find that wintertime latent heat fluxes dominate the water-mass transformation rate in the interior waters of the Gulf leading to a diapycnal volume flux directed toward higher densities. In the zonal overturning cell, fluid is drawn in from the Sea of Oman through the Strait of Hormuz, transformed, and exits the Strait near the southern and bottom boundaries. 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Along the southern margin of the Gulf, evaporation plays an important role in the meridional overturning pattern inducing sinking there.</description><subject>Air</subject><subject>Air-sea flux</subject><subject>Evaporation</subject><subject>Heat flux</subject><subject>Heat transfer</subject><subject>Latent heat</subject><subject>Mass</subject><subject>Seasonal variation</subject><subject>Straits</subject><subject>Three dimensional flow</subject><subject>Transformations</subject><subject>Water circulation</subject><subject>Water mass transformation</subject><subject>Water masses</subject><issn>0022-3670</issn><issn>1520-0485</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2021</creationdate><recordtype>article</recordtype><recordid>eNotkM1LAzEUxIMoWKtnrwHPaV8-N3ssrdZKpR4qHkM2m-iWNluTXcH_3i31NAwzzHv8ELqnMKG0kNOXtw1ZEAYEmCgn9AKNqDw5oeUlGgEwRrgq4Brd5LwDAEVZOUKrD9v5hF9tznibbMyhTQfbNW3ENtZ48-NT16fYxE88b5Lr9-esibj78niWbNXYiJf9Ptyiq2D32d_96xi9Pz1u589kvVmu5rM1cUyVHSmpULSspLfe6xA4WK58xUXtXbA06MoJELIWRU0r4UKtyipY7qQvpAdBgY_Rw3n3mNrv3ufO7Nrhw-GkYapQoLWWemhNzy2X2pyTD-aYmoNNv4aCOfEyAy-zMAzMiZeh_A9HuF6F</recordid><startdate>202111</startdate><enddate>202111</enddate><creator>Al-Shehhi, Maryam R.</creator><creator>Song, Hajoon</creator><creator>Scott, Jeffery</creator><creator>Marshall, John</creator><general>American Meteorological Society</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7TG</scope><scope>7TN</scope><scope>F1W</scope><scope>H96</scope><scope>KL.</scope><scope>L.G</scope></search><sort><creationdate>202111</creationdate><title>Water Mass Transformation and Overturning Circulation in the Arabian Gulf</title><author>Al-Shehhi, Maryam R. ; Song, Hajoon ; Scott, Jeffery ; Marshall, John</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c269t-914619b5eaee8ff30a36eb34decfa1f8bc4045d47d1b4cfd69bfa3c5e75e04103</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2021</creationdate><topic>Air</topic><topic>Air-sea flux</topic><topic>Evaporation</topic><topic>Heat flux</topic><topic>Heat transfer</topic><topic>Latent heat</topic><topic>Mass</topic><topic>Seasonal variation</topic><topic>Straits</topic><topic>Three dimensional flow</topic><topic>Transformations</topic><topic>Water circulation</topic><topic>Water mass transformation</topic><topic>Water masses</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Al-Shehhi, Maryam R.</creatorcontrib><creatorcontrib>Song, Hajoon</creatorcontrib><creatorcontrib>Scott, Jeffery</creatorcontrib><creatorcontrib>Marshall, John</creatorcontrib><collection>CrossRef</collection><collection>Meteorological & Geoastrophysical Abstracts</collection><collection>Oceanic Abstracts</collection><collection>ASFA: Aquatic Sciences and Fisheries Abstracts</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) 2: Ocean Technology, Policy & Non-Living Resources</collection><collection>Meteorological & Geoastrophysical Abstracts - Academic</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) Professional</collection><jtitle>Journal of physical oceanography</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Al-Shehhi, Maryam R.</au><au>Song, Hajoon</au><au>Scott, Jeffery</au><au>Marshall, John</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Water Mass Transformation and Overturning Circulation in the Arabian Gulf</atitle><jtitle>Journal of physical oceanography</jtitle><date>2021-11</date><risdate>2021</risdate><volume>51</volume><issue>11</issue><spage>3513</spage><epage>3527</epage><pages>3513-3527</pages><issn>0022-3670</issn><eissn>1520-0485</eissn><abstract>We diagnose the ocean’s residual overturning circulation of the Arabian Gulf in a high-resolution model and interpret it in terms of water-mass transformation processes mediated by air–sea buoyancy fluxes and interior mixing. We attempt to rationalize the complex three-dimensional flow in terms of the superposition of a zonal (roughly along axis) and meridional (transverse) overturning pattern. Rates of overturning and the seasonal cycle of air–sea fluxes sustaining them are quantified and ranked in order of importance. Air–sea fluxes dominate the budget so that, at zero order, the magnitude and sense of the overturning circulation can be inferred from air–sea fluxes, with interior mixing playing a lesser role. We find that wintertime latent heat fluxes dominate the water-mass transformation rate in the interior waters of the Gulf leading to a diapycnal volume flux directed toward higher densities. In the zonal overturning cell, fluid is drawn in from the Sea of Oman through the Strait of Hormuz, transformed, and exits the Strait near the southern and bottom boundaries. 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source | American Meteorological Society; EZB-FREE-00999 freely available EZB journals |
subjects | Air Air-sea flux Evaporation Heat flux Heat transfer Latent heat Mass Seasonal variation Straits Three dimensional flow Transformations Water circulation Water mass transformation Water masses |
title | Water Mass Transformation and Overturning Circulation in the Arabian Gulf |
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