The North Equatorial Current/Undercurrent volume transport and its 40-day variability from a mooring array along 130°E
Traditionally, the estimated volume transport of the North Equatorial Current/Undercurrent (NEC/NEUC) is based on geostrophic equations and/or model results; however, direct observational evidence has not been acquired. We focused on one-year mooring observation data collected along 130°E and calcul...
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| Veröffentlicht in: | Journal of oceanology and limnology 2021-11, Vol.39 (6), p.2127-2143 |
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| description | Traditionally, the estimated volume transport of the North Equatorial Current/Undercurrent (NEC/NEUC) is based on geostrophic equations and/or model results; however, direct observational evidence has not been acquired. We focused on one-year mooring observation data collected along 130°E and calculated the NEC/NEUC volume transport and explore its variability. Results show that the mean NEC and NEUC volume transports calculated from the mean velocity structures in the upper 950 m are 39 Sv and 6 Sv, respectively. Analysis of daily mooring data indicated that the volume transport of the NEC is approximately 52 (±14) Sv and the volume transport of the NEUC is approximately 18 (±13) Sv. A significant 40-day variation existed for the volume transport of both the NEC and NEUC. Overall, the intraseasonal variability (ISV) of the NEC is vertically coherent with that of the NEUC. Observations indicated that the NEUC has three cores centered at approximately 8.5°N (∼500 m), 12.5°N (∼700 m), and 17.5°N (∼900 m), of which the middle core (12.5°N) is the strongest. The 40-day variability of the NEC and NEUC is related to the variability of local wind stress curl anomalies among various Madden-Julian Oscillation (MJO) phases. When local wind field generates a negative (positive) wind stress curl anomaly, a weaker NEC (NEUC) and stronger NEUC (NEC) would occur. |
| doi_str_mv | 10.1007/s00343-020-0289-x |
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We focused on one-year mooring observation data collected along 130°E and calculated the NEC/NEUC volume transport and explore its variability. Results show that the mean NEC and NEUC volume transports calculated from the mean velocity structures in the upper 950 m are 39 Sv and 6 Sv, respectively. Analysis of daily mooring data indicated that the volume transport of the NEC is approximately 52 (±14) Sv and the volume transport of the NEUC is approximately 18 (±13) Sv. A significant 40-day variation existed for the volume transport of both the NEC and NEUC. Overall, the intraseasonal variability (ISV) of the NEC is vertically coherent with that of the NEUC. Observations indicated that the NEUC has three cores centered at approximately 8.5°N (∼500 m), 12.5°N (∼700 m), and 17.5°N (∼900 m), of which the middle core (12.5°N) is the strongest. The 40-day variability of the NEC and NEUC is related to the variability of local wind stress curl anomalies among various Madden-Julian Oscillation (MJO) phases. When local wind field generates a negative (positive) wind stress curl anomaly, a weaker NEC (NEUC) and stronger NEUC (NEC) would occur.</description><identifier>ISSN: 2096-5508</identifier><identifier>EISSN: 2523-3521</identifier><identifier>DOI: 10.1007/s00343-020-0289-x</identifier><language>eng</language><publisher>Heidelberg: Science Press</publisher><subject>Earth and Environmental Science ; Earth Sciences ; General circulation models ; Laboratories ; Limnology ; Local winds ; Madden-Julian oscillation ; Mooring ; Mooring systems ; Ocean circulation ; Ocean currents ; Oceanography ; Physics ; Science ; Seasonal variations ; Undercurrents ; Variability ; Volume transport ; Wind ; Wind stress ; Wind stress curl</subject><ispartof>Journal of oceanology and limnology, 2021-11, Vol.39 (6), p.2127-2143</ispartof><rights>Chinese Society for Oceanology and Limnology, Science Press and Springer-Verlag GmbH Germany, part of Springer Nature 2021</rights><rights>Chinese Society for Oceanology and Limnology, Science Press and Springer-Verlag GmbH Germany, part of Springer Nature 2021.</rights><rights>Copyright © Wanfang Data Co. 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All Rights Reserved.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><cites>FETCH-LOGICAL-c2173-8a0dbf837c61caa1eb22d1e057e621f3194677e434c38d4bff39ed33778ff0123</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Uhttp://www.wanfangdata.com.cn/images/PeriodicalImages/zghyhzxb/zghyhzxb.jpg</thumbnail><linktopdf>$$Uhttps://www.proquest.com/docview/2917948415/fulltextPDF?pq-origsite=primo$$EPDF$$P50$$Gproquest$$H</linktopdf><linktohtml>$$Uhttps://www.proquest.com/docview/2917948415?pq-origsite=primo$$EHTML$$P50$$Gproquest$$H</linktohtml><link.rule.ids>314,780,784,21388,21389,21390,21391,23256,27924,27925,33530,33703,33744,34005,34314,41488,42557,43659,43787,43805,43953,44067,51319,64385,64389,72469,74104,74283,74302,74473,74590</link.rule.ids></links><search><creatorcontrib>Yuan, Xin</creatorcontrib><creatorcontrib>Wang, Qingye</creatorcontrib><creatorcontrib>Feng, Junqiao</creatorcontrib><creatorcontrib>Hu, Dunxin</creatorcontrib><title>The North Equatorial Current/Undercurrent volume transport and its 40-day variability from a mooring array along 130°E</title><title>Journal of oceanology and limnology</title><addtitle>J. Ocean. Limnol</addtitle><description>Traditionally, the estimated volume transport of the North Equatorial Current/Undercurrent (NEC/NEUC) is based on geostrophic equations and/or model results; however, direct observational evidence has not been acquired. We focused on one-year mooring observation data collected along 130°E and calculated the NEC/NEUC volume transport and explore its variability. Results show that the mean NEC and NEUC volume transports calculated from the mean velocity structures in the upper 950 m are 39 Sv and 6 Sv, respectively. Analysis of daily mooring data indicated that the volume transport of the NEC is approximately 52 (±14) Sv and the volume transport of the NEUC is approximately 18 (±13) Sv. A significant 40-day variation existed for the volume transport of both the NEC and NEUC. Overall, the intraseasonal variability (ISV) of the NEC is vertically coherent with that of the NEUC. Observations indicated that the NEUC has three cores centered at approximately 8.5°N (∼500 m), 12.5°N (∼700 m), and 17.5°N (∼900 m), of which the middle core (12.5°N) is the strongest. The 40-day variability of the NEC and NEUC is related to the variability of local wind stress curl anomalies among various Madden-Julian Oscillation (MJO) phases. When local wind field generates a negative (positive) wind stress curl anomaly, a weaker NEC (NEUC) and stronger NEUC (NEC) would occur.</description><subject>Earth and Environmental Science</subject><subject>Earth Sciences</subject><subject>General circulation models</subject><subject>Laboratories</subject><subject>Limnology</subject><subject>Local winds</subject><subject>Madden-Julian oscillation</subject><subject>Mooring</subject><subject>Mooring systems</subject><subject>Ocean circulation</subject><subject>Ocean currents</subject><subject>Oceanography</subject><subject>Physics</subject><subject>Science</subject><subject>Seasonal variations</subject><subject>Undercurrents</subject><subject>Variability</subject><subject>Volume transport</subject><subject>Wind</subject><subject>Wind stress</subject><subject>Wind stress curl</subject><issn>2096-5508</issn><issn>2523-3521</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2021</creationdate><recordtype>article</recordtype><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>AZQEC</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><sourceid>GNUQQ</sourceid><recordid>eNp1kctqwzAQRU1poaHNB3Qn6KoLNzOSbdnLEtIHhHaTrIVsS4mDYyWSnddX9Rv6ZVVwIasuhEZwzhXMDYIHhGcE4CMHwCIWAgV_0iw8XAUDGlMWspjitZ8hS8I4hvQ2GDq3AvBkSiGOB8F-tlTk09h2SSbbTrbGVrIm485a1bSjeVMqW_QPsjN1t1aktbJxG28Q2ZSkah2JICzlkeykd_Oqrtoj0dasiSRr4_OaBZHWekDWxs_I4Od7ch_caFk7Nfy774L562Q2fg-nX28f45dpWFDkLEwllLlOGS8SLKRElVNaooKYq4SiZphFCecqYlHB0jLKtWaZKhnjPNUakLK74KnP3ctGy2YhVqazjf9RnBbL4_J0yClQhASQefaxZzfWbDvl2gtMM-RZlEYYewp7qrDGOau02NhqLe1RIIhzHaKvQ_gli3Md4uAd2jtuc96Hspfk_6VfXeWOBw</recordid><startdate>20211101</startdate><enddate>20211101</enddate><creator>Yuan, Xin</creator><creator>Wang, Qingye</creator><creator>Feng, Junqiao</creator><creator>Hu, Dunxin</creator><general>Science Press</general><general>Springer Nature B.V</general><general>Key Laboratory of Ocean Circulation and Waves,Institute of Oceanology,Chinese Academy of Sciences,Qingdao 266071,China</general><general>Center for Ocean Mega-Science,Chinese Academy of Sciences,Qingdao 266071,China%Key Laboratory of Ocean Circulation and Waves,Institute of Oceanology,Chinese Academy of Sciences,Qingdao 266071,China</general><general>University of Chinese Academy of Sciences,Beijing 100049,China</general><general>Center for Ocean Mega-Science,Chinese Academy of Sciences,Qingdao 266071,China</general><general>Laboratory for Ocean and Climate Dynamics,Pilot National Laboratory for Marine Science and Technology (Qingdao),Qingdao 266237,China</general><scope>AAYXX</scope><scope>CITATION</scope><scope>3V.</scope><scope>7QH</scope><scope>7QL</scope><scope>7SN</scope><scope>7TN</scope><scope>7U7</scope><scope>7UA</scope><scope>7XB</scope><scope>88I</scope><scope>8FK</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>AZQEC</scope><scope>BENPR</scope><scope>BHPHI</scope><scope>BKSAR</scope><scope>C1K</scope><scope>CCPQU</scope><scope>DWQXO</scope><scope>F1W</scope><scope>GNUQQ</scope><scope>H96</scope><scope>HCIFZ</scope><scope>L.G</scope><scope>M2P</scope><scope>M7N</scope><scope>PCBAR</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>Q9U</scope><scope>2B.</scope><scope>4A8</scope><scope>92I</scope><scope>93N</scope><scope>PSX</scope><scope>TCJ</scope></search><sort><creationdate>20211101</creationdate><title>The North Equatorial Current/Undercurrent volume transport and its 40-day variability from a mooring array along 130°E</title><author>Yuan, Xin ; Wang, Qingye ; Feng, Junqiao ; Hu, Dunxin</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c2173-8a0dbf837c61caa1eb22d1e057e621f3194677e434c38d4bff39ed33778ff0123</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2021</creationdate><topic>Earth and Environmental Science</topic><topic>Earth Sciences</topic><topic>General circulation models</topic><topic>Laboratories</topic><topic>Limnology</topic><topic>Local winds</topic><topic>Madden-Julian oscillation</topic><topic>Mooring</topic><topic>Mooring systems</topic><topic>Ocean circulation</topic><topic>Ocean currents</topic><topic>Oceanography</topic><topic>Physics</topic><topic>Science</topic><topic>Seasonal variations</topic><topic>Undercurrents</topic><topic>Variability</topic><topic>Volume transport</topic><topic>Wind</topic><topic>Wind stress</topic><topic>Wind stress curl</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Yuan, Xin</creatorcontrib><creatorcontrib>Wang, Qingye</creatorcontrib><creatorcontrib>Feng, Junqiao</creatorcontrib><creatorcontrib>Hu, Dunxin</creatorcontrib><collection>CrossRef</collection><collection>ProQuest Central (Corporate)</collection><collection>Aqualine</collection><collection>Bacteriology Abstracts (Microbiology B)</collection><collection>Ecology Abstracts</collection><collection>Oceanic Abstracts</collection><collection>Toxicology Abstracts</collection><collection>Water Resources Abstracts</collection><collection>ProQuest Central (purchase pre-March 2016)</collection><collection>Science Database (Alumni Edition)</collection><collection>ProQuest Central (Alumni) (purchase pre-March 2016)</collection><collection>ProQuest Central (Alumni)</collection><collection>ProQuest Central UK/Ireland</collection><collection>ProQuest Central Essentials</collection><collection>ProQuest Central</collection><collection>ProQuest Natural Science Collection</collection><collection>ProQuest Earth, Atmospheric & Aquatic Science</collection><collection>Environmental Sciences and Pollution Management</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>Aquatic Science & Fisheries Abstracts (ASFA) 2: Ocean Technology, Policy & Non-Living Resources</collection><collection>SciTech Premium Collection</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) Professional</collection><collection>Science Journals (ProQuest Database)</collection><collection>Algology Mycology and Protozoology Abstracts (Microbiology C)</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>ProQuest Central Basic</collection><collection>Wanfang Data Journals - Hong Kong</collection><collection>WANFANG Data Centre</collection><collection>Wanfang Data Journals</collection><collection>万方数据期刊 - 香港版</collection><collection>China Online Journals (COJ)</collection><collection>China Online Journals (COJ)</collection><jtitle>Journal of oceanology and limnology</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Yuan, Xin</au><au>Wang, Qingye</au><au>Feng, Junqiao</au><au>Hu, Dunxin</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>The North Equatorial Current/Undercurrent volume transport and its 40-day variability from a mooring array along 130°E</atitle><jtitle>Journal of oceanology and limnology</jtitle><stitle>J. Ocean. Limnol</stitle><date>2021-11-01</date><risdate>2021</risdate><volume>39</volume><issue>6</issue><spage>2127</spage><epage>2143</epage><pages>2127-2143</pages><issn>2096-5508</issn><eissn>2523-3521</eissn><abstract>Traditionally, the estimated volume transport of the North Equatorial Current/Undercurrent (NEC/NEUC) is based on geostrophic equations and/or model results; however, direct observational evidence has not been acquired. We focused on one-year mooring observation data collected along 130°E and calculated the NEC/NEUC volume transport and explore its variability. Results show that the mean NEC and NEUC volume transports calculated from the mean velocity structures in the upper 950 m are 39 Sv and 6 Sv, respectively. Analysis of daily mooring data indicated that the volume transport of the NEC is approximately 52 (±14) Sv and the volume transport of the NEUC is approximately 18 (±13) Sv. A significant 40-day variation existed for the volume transport of both the NEC and NEUC. Overall, the intraseasonal variability (ISV) of the NEC is vertically coherent with that of the NEUC. Observations indicated that the NEUC has three cores centered at approximately 8.5°N (∼500 m), 12.5°N (∼700 m), and 17.5°N (∼900 m), of which the middle core (12.5°N) is the strongest. The 40-day variability of the NEC and NEUC is related to the variability of local wind stress curl anomalies among various Madden-Julian Oscillation (MJO) phases. When local wind field generates a negative (positive) wind stress curl anomaly, a weaker NEC (NEUC) and stronger NEUC (NEC) would occur.</abstract><cop>Heidelberg</cop><pub>Science Press</pub><doi>10.1007/s00343-020-0289-x</doi><tpages>17</tpages></addata></record> |
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| subjects | Earth and Environmental Science Earth Sciences General circulation models Laboratories Limnology Local winds Madden-Julian oscillation Mooring Mooring systems Ocean circulation Ocean currents Oceanography Physics Science Seasonal variations Undercurrents Variability Volume transport Wind Wind stress Wind stress curl |
| title | The North Equatorial Current/Undercurrent volume transport and its 40-day variability from a mooring array along 130°E |
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