Article(id=1200024644628607467, tenantId=1146029695717560320, journalId=1149651085930835976, issueId=1200024643240292843, articleNumber=null, orderNo=null, doi=10.12284/hyxb2024070, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1691856000000, receivedDateStr=2023-08-13, revisedDate=1699200000000, revisedDateStr=2023-11-06, acceptedDate=null, acceptedDateStr=null, onlineDate=1764037770658, onlineDateStr=2025-11-25, pubDate=1706630400000, pubDateStr=2024-01-31, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1764037770658, onlineIssueDateStr=2025-11-25, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1764037770658, creator=13701087609, updateTime=1764037770658, updator=13701087609, issue=Issue{id=1200024643240292843, tenantId=1146029695717560320, journalId=1149651085930835976, year='2024', volume='46', issue='1', pageStart='1', pageEnd='130', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=0, articleOrder=1, issueType=-1, specialIssue=null, createTime=1764037770328, creator=13701087609, updateTime=1764056122067, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1200101616062923672, tenantId=1146029695717560320, journalId=1149651085930835976, issueId=1200024643240292843, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1200101616062923673, tenantId=1146029695717560320, journalId=1149651085930835976, issueId=1200024643240292843, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=27, endPage=38, ext={EN=ArticleExt(id=1200024644842516973, articleId=1200024644628607467, tenantId=1146029695717560320, journalId=1149651085930835976, language=EN, title=Energy analysis of submesoscale processes in the Agulhas current system, columnId=null, journalTitle=Haiyang Xuebao, columnName=null, runingTitle=null, highlight=null, articleAbstract=
Based on the high-resolution oceanic numerical model product of MITgcm with a resolution of (1/48)°, the geostrophic balanced motion and unbalanced wave motion are decomposed via the frequency-wavenumber spectrum analysis method to analyze the distribution of submesoscale characteristics and diagnose the main factors affecting their seasonal variations in the Agulhas current system. The results show that the submesoscale processes in the Agulhas current system have a significant seasonal distribution with strong features in winter but weak features in summer. The mixed layer baroclinic instability is the main reason affecting the submesoscale seasonal differences in the area. In addition, the geostrophic balanced motions are predominant in the submesoscale process in the regions with stronger eddy kinetic energy (EKE) and have no obvious seasonality. For the regions with weaker EKE, the balanced and unbalanced geostrophic motions show significant seasonality, where the local mixing layer shallowness is responsible for the increase of the unbalanced kinetic energy in summer. Our analysis helps to further clarify the characteristics of submesoscale seasonal variation and its primary factors in the Agulhas current system. The effective separation of geostrophic balanced and unbalanced motion enhances our understanding of energy transformation between multiscale processes in the ocean.
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本文基于(1/48)°MITgcm数值模拟结果,通过频率−波数谱分析等方法分离地转平衡和非地转运动,分析了阿古拉斯流域亚中尺度的分布特征,讨论了其季节性变化的主要影响因素。结果表明,阿古拉斯流域亚中尺度过程具有冬强夏弱的显著季节变化特征,混合层斜压不稳定是影响该流域亚中尺度季节性差异的主要原因。此外,在涡动能较强的区域,地转平衡运动始终主导亚中尺度过程,季节性变化较小;在涡动能较弱的区域,地转平衡与非地转分量具有明显的季节性差异,局地混合层浅化可能是导致夏季非地转分量贡献增加的主要机制。本文研究结果有助于进一步探究阿古拉斯流域亚中尺度的季节性变化及其主导因素,地转平衡与非地转运动的有效分离加强了我们对海洋多尺度之间能量传递的理解。
, correspAuthors=何宜军, authorNote=null, correspAuthorsNote=
, copyrightStatement=版权所有©《海洋学报》编辑部 2024
赵若楠,李刚,何宜军. 阿古拉斯流域亚中尺度过程的能量分析[J]. 海洋学报,2024,46(1):27–38 Zhao Ruonan,Li Gang,He Yijun. Energy analysis of submesoscale processes in the Agulhas current system[J]. Haiyang Xuebao,2024, 46(1):27–38
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赵若楠(1999—),女,内蒙古自治区呼和浩特市人,从事海洋亚中尺度过程研究。E-mail:20211209013@nuist.edu.cn
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赵若楠(1999—),女,内蒙古自治区呼和浩特市人,从事海洋亚中尺度过程研究。E-mail:20211209013@nuist.edu.cn
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Laboratory for Regional Oceanography and Numerical Modeling, Laoshan National Laboratory, Qingdao 266237, China), AuthorCompanyExt(id=1200091106990981941, tenantId=1146029695717560320, journalId=1149651085930835976, articleId=1200024644628607467, companyId=1200091106978399028, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=3.崂山实验室 区域海洋动力学与数值模拟功能实验室,山东 青岛 266237)])], figs=[ArticleFig(id=1200091110652609466, tenantId=1146029695717560320, journalId=1149651085930835976, articleId=1200024644628607467, language=EN, label=Fig. 1, caption=
The distribution of water depth and main flow field in Agulhas Current (a) and the surface time average eddy kinetic energy from October 2011 to September 2012 (b), figureFileSmall=67LvIXqZ5s6GaDk045n0cQ==, figureFileBig=n2t6xaitWWhvvrx2Io4tig==, tableContent=null), ArticleFig(id=1200091110824575932, tenantId=1146029695717560320, journalId=1149651085930835976, articleId=1200024644628607467, language=CN, label=图1, caption=
阿古拉斯流域水深及主要流场分布(a)与2011年10月至2012年9月海表面时间平均涡动能分布(b), figureFileSmall=67LvIXqZ5s6GaDk045n0cQ==, figureFileBig=n2t6xaitWWhvvrx2Io4tig==, tableContent=null), ArticleFig(id=1200091110954599362, tenantId=1146029695717560320, journalId=1149651085930835976, articleId=1200024644628607467, language=EN, label=Fig. 2, caption=
The daily mean distributions of surface relative vorticity $ \zeta $ (a, c) and horizontal mesoscale strain rate MSR (b, d) on January 15 (a, b) and on July 15 (c, d) in study sea area (the data are standaridized by planetary vorticity f), figureFileSmall=2/KeZYfGauXJuetg1vTM8w==, figureFileBig=2XizcVWGV2yACBeRyDHw6Q==, tableContent=null), ArticleFig(id=1200091111084622790, tenantId=1146029695717560320, journalId=1149651085930835976, articleId=1200024644628607467, language=CN, label=图2, caption=
研究海域海表层相对涡度$ \zeta $(a, c)与中尺度水平应变率MSR(b, d)在1月15日(a, b)和7月15日(c, d)日平均水平分布情况(数据均以行星涡度$ f $标准化), figureFileSmall=2/KeZYfGauXJuetg1vTM8w==, figureFileBig=2XizcVWGV2yACBeRyDHw6Q==, tableContent=null), ArticleFig(id=1200091111227229132, tenantId=1146029695717560320, journalId=1149651085930835976, articleId=1200024644628607467, language=EN, label=Fig. 3, caption=
The daily mean distributions of mesoscale frontal tendency F (a, c) and frontal sharpness M (b, d) on January 15 (a, b) and on July 15 (c, d) in study sea area, figureFileSmall=jAgFiPjEgYURuGBnElkFbg==, figureFileBig=CwO0ABiLqsIp1ofj3feUVA==, tableContent=null), ArticleFig(id=1200091111315309519, tenantId=1146029695717560320, journalId=1149651085930835976, articleId=1200024644628607467, language=CN, label=图3, caption=
研究海域海表层中尺度锋生趋势F(a, c)和锋面强度M(b, d)在1月15日(a, b)和7月15日(c, d)日平均水平分布情况, figureFileSmall=jAgFiPjEgYURuGBnElkFbg==, figureFileBig=CwO0ABiLqsIp1ofj3feUVA==, tableContent=null), ArticleFig(id=1200091111407584210, tenantId=1146029695717560320, journalId=1149651085930835976, articleId=1200024644628607467, language=EN, label=Fig. 4, caption=
Time series of mesoscale frontal tendency F (blue line) and frontal sharpness M (red line) in R1 (a), R2 (b), R3 (c) and R4 (d), figureFileSmall=COIdPuS44yESP0gajcd3tw==, figureFileBig=ijr1NYxTriNbnWvHxBOAcw==, tableContent=null), ArticleFig(id=1200091111512441813, tenantId=1146029695717560320, journalId=1149651085930835976, articleId=1200024644628607467, language=CN, label=图4, caption=
R1(a)、R2(b)、R3(c)和R4(d)各区域中尺度锋生趋势F(蓝色曲线)和锋面强度M(红色曲线)的时间变化, figureFileSmall=COIdPuS44yESP0gajcd3tw==, figureFileBig=ijr1NYxTriNbnWvHxBOAcw==, tableContent=null), ArticleFig(id=1200091111638270937, tenantId=1146029695717560320, journalId=1149651085930835976, articleId=1200024644628607467, language=EN, label=Fig. 5, caption=
The daily mean distributions of surface potential vorticity PV (a, d) and its vertical component $ {q}_{{\mathrm{vert}}} $ (b, e) and horizontal baroclinic component $ {q}_{{\mathrm{bc}}} $ (c, f) on January 15 (a−c) and on July 15 (e−f) in research sea area, figureFileSmall=jqp0cZtMD6L6F6MyZT3kOA==, figureFileBig=hmmB6eAlqOlbOVNRDgHxmQ==, tableContent=null), ArticleFig(id=1200091111743128541, tenantId=1146029695717560320, journalId=1149651085930835976, articleId=1200024644628607467, language=CN, label=图5, caption=
研究海域海表层位涡PV(a, d)及其垂向分量$ {q}_{{\mathrm{vert}}} $(b, e)和水平斜压分量$ {q}_{{\mathrm{bc}}} $(c, f)在1月15日(a−c)和7月15日(e−f)日平均水平分布情况, figureFileSmall=jqp0cZtMD6L6F6MyZT3kOA==, figureFileBig=hmmB6eAlqOlbOVNRDgHxmQ==, tableContent=null), ArticleFig(id=1200091111927677923, tenantId=1146029695717560320, journalId=1149651085930835976, articleId=1200024644628607467, language=EN, label=Fig. 6, caption=
Variations of averaged the RMS of $ \zeta /f $ (a−d) and the PKE (e−h) over time and depth in R1 (a, e), R2 (b, f), R3 (c, g) and R4 (d, h), figureFileSmall=MGYAZT+2uUOUaCfRubojmA==, figureFileBig=uVDNYstOpSuWF7tSq5ZSAA==, tableContent=null), ArticleFig(id=1200091112036729831, tenantId=1146029695717560320, journalId=1149651085930835976, articleId=1200024644628607467, language=CN, label=图6, caption=
R1(a, e)、R2(b, f)、R3(c, g)和R4(d, h)各区域平均相对涡度$ \zeta /f $均方根(a−d)与PKE(e−h)随时间和深度的变化情况, figureFileSmall=MGYAZT+2uUOUaCfRubojmA==, figureFileBig=uVDNYstOpSuWF7tSq5ZSAA==, tableContent=null), ArticleFig(id=1200091112137393133, tenantId=1146029695717560320, journalId=1149651085930835976, articleId=1200024644628607467, language=EN, label=Fig. 7, caption=
The frequency-wavenumber spectra distributions of surface eddy kinetic energy and their frequency spectra in R1 (a), R2 (b), R3 (c) and R4 (d), figureFileSmall=I6klnADIEosVfzzSNA1/DA==, figureFileBig=I7XulUsIVuA05ZVAAtX1lQ==, tableContent=null), ArticleFig(id=1200091112204502001, tenantId=1146029695717560320, journalId=1149651085930835976, articleId=1200024644628607467, language=CN, label=图7, caption=
R1(a)、R2(b)、R3(c)和R4(d)各子区域年涡动能频率−波数谱分析结果及其对应频率谱, figureFileSmall=I6klnADIEosVfzzSNA1/DA==, figureFileBig=I7XulUsIVuA05ZVAAtX1lQ==, tableContent=null), ArticleFig(id=1200091112275805172, tenantId=1146029695717560320, journalId=1149651085930835976, articleId=1200024644628607467, language=EN, label=Fig. 8, caption=
Wave number spectrum in R1 (a, e), R2 (b, f), R3 (c, g) and R4 (d, h) in summer (a−d) and winter (e−h), figureFileSmall=kvf7GgzYv3yapJPDxrNXGw==, figureFileBig=1xojLOkyeCoj/IaEmYvu6g==, tableContent=null), ArticleFig(id=1200091112351302648, tenantId=1146029695717560320, journalId=1149651085930835976, articleId=1200024644628607467, language=CN, label=图8, caption=
R1(a, e)、R2(b, f)、R3(c, g)和R4(d, h)各区域夏(a−d)、冬(e−h)两季波数谱, figureFileSmall=kvf7GgzYv3yapJPDxrNXGw==, figureFileBig=1xojLOkyeCoj/IaEmYvu6g==, tableContent=null), ArticleFig(id=1200091112418411516, tenantId=1146029695717560320, journalId=1149651085930835976, articleId=1200024644628607467, language=EN, label=Fig. 9, caption=
The ratio of submesoscale kinetic energy to total kinetic energy (a) and submesoscale unbalanced kinetic energy to submesoscale kinetic energy (b) in subregions R1, R2, R3, and R4, figureFileSmall=JjX+Vh6q4IwEDGjEF1l9yw==, figureFileBig=CjT0fjwi6RdineyBeeGH+g==, tableContent=null), ArticleFig(id=1200091112481326080, tenantId=1146029695717560320, journalId=1149651085930835976, articleId=1200024644628607467, language=CN, label=图9, caption=
R1、R2、R3和R4各区域亚中尺度动能占总动能比(a)和亚中尺度非地转动能占亚中尺度动能比(b), figureFileSmall=JjX+Vh6q4IwEDGjEF1l9yw==, figureFileBig=CjT0fjwi6RdineyBeeGH+g==, tableContent=null), ArticleFig(id=1200091112636514310, tenantId=1146029695717560320, journalId=1149651085930835976, articleId=1200024644628607467, language=EN, label=Fig. 10, caption=
Monthly variation of the ratio of submesoscale geostrophic balanced energy to unbalanced energy (red line), transition scale $ Lt $ (blue line) and mixed layer depth (yellow line) in R1 (a), R2 (b), R3 (c) and R4 (d), figureFileSmall=YN/bABP0sjgs/mv5eARGuQ==, figureFileBig=DPuR/ooVknRO3cz2ud7yJw==, tableContent=null), ArticleFig(id=1200091112745566219, tenantId=1146029695717560320, journalId=1149651085930835976, articleId=1200024644628607467, language=CN, label=图10, caption=
R1(a)、R2(b)、R3(c)和R4(d)各区域亚中尺度下地转动能与非地转动能比值(红色折线)、过渡尺度$ Lt $(蓝色折线)和混合层深度(黄色折线)逐月分布, figureFileSmall=YN/bABP0sjgs/mv5eARGuQ==, figureFileBig=DPuR/ooVknRO3cz2ud7yJw==, tableContent=null)], attaches=null, journal=Journal(id=1146441459026210850, delFlag=0, nameCn=海洋学报, nameEn=Haiyang Xuebao, nameHistory1=null, nameHistory2=null, issn=0253-4193, eissn=null, cn=11-2055/P, coden=null, periodic=0, language=CN, oaType=否, ccby=null, superviseOffice=null, ownerOffice=null, pubOffice=null, editorOffice=null, officeType=null, aims=null, clcCode=null, officeProv=null, officeCity=null, officeAddr=null, officeZip=null, officeEmail=null, officePhone=null, editDirector=null, officeDirector=null, officeDirectorPhone=null, officeStaffNum=null, officeEmpNum=null, coverPicUrl=uYi7hkkrve+l8pIcwqcaQQ==, journalPrice=null, startedYear=null, abbrevIsoEn=null, journalRemark=null, publicationField=null, createdTime=1751262543687, updatedTime=1761729782936, createdBy=18614031015, updatedBy=13701087609, 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