Abstract
The spatial distribution of eddy diffusivity, basic characteristics of coherent mesoscale eddies and their relationship are analyzed from numerical model outputs in the Southern Ocean. Mesoscale fluctuation information is obtained by a temporal-spatial filtering method, and the eddy diffusivity is calculated using a linear regression analysis between isoneutral thickness flux and large-scale isoneutral thickness gradient. The eddy diffusivity is on the order of O (103 m2/s) with a significant spatial variation, and it is larger in the area with strong coherent mesoscale eddy activity. The mesoscale eddies are mainly located in the upper ocean layer, with the average intensity no larger than 0.2. The mean radius of the coherent mesoscale cyclonic (anticyclonic) eddy gradually decays from (121.2±10.4) km ((117.8±9.6) km) at 30°S to (43.9±5.3) km ((44.7±4.9) km) at 65°S. Their vertical penetration depths (lifespans) are deeper (longer) between the northern side of the Subpolar Antarctic Front and 48°S. The normalized eddy diffusivity and coherent mesoscale eddy activity show a significant positive correlation, indicating that coherent mesoscale eddy plays an important role in eddy diffusivity.
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References
Abernathey R, Ferreira D, Klocker A. 2013. Diagnostics of isopycnal mixing in a circumpolar channel. Ocean Modelling, 72: 1–16, doi: https://doi.org/10.1016/j.ocemod.2013.07.004
Abernathey R, Marshall J, Mazloff M, et al. 2010. Enhancement of mesoscale eddy stirring at steering levels in the Southern Ocean. Journal of Physical Oceanography, 40(1): 170–184, doi: https://doi.org/10.1175/2009JPO4201.1
Adams K A, Hosegood P, Taylor J R, et al. 2017. Frontal circulation and submesoscale variability during the formation of a Southern Ocean mesoscale eddy. Journal of Physical Oceanography, 47(7): 1737–1753, doi: https://doi.org/10.1175/JPO-D-16-0266.1
Aguiar A C B, Peliz Á, Carton X. 2013. A census of Meddies in a long-term high-resolution simulation. Progress in Oceanography, 116: 80–94, doi: https://doi.org/10.1016/j.pocean.2013.06.016
Bachman S, Fox-Kemper B. 2013. Eddy parameterization challenge suite I: Eady spindown. Ocean Modelling, 64: 12–28, doi: https://doi.org/10.1016/j.ocemod.2012.12.003
Bachman S D, Fox-Kemper B, Bryan F O. 2015. A tracer-based inversion method for diagnosing eddy-induced diffusivity and advection. Ocean Modelling, 86: 1–14, doi: https://doi.org/10.1016/j.ocemod.2014.11.006
Bachman D, Fox-Kemper B, Bryan F O. 2020. A diagnosis of anisotropic eddy diffusion from a high-resolution global ocean model. Journal of Advances in Modeling Earth Systems, 12(2): e2019MS001904
Bachman S D, Marshall D P, Maddison J R, et al. 2017. Evaluation of a scalar eddy transport coefficient based on geometric constraints. Ocean Modelling, 109: 44–54, doi: https://doi.org/10.1016/j.ocemod.2016.12.004
Bryan K, Dukowicz J K, Smith R D. 1999. On the mixing coefficient in the parameterization of bolus velocity. Journal of Physical Oceanography, 29(9): 2442–2456, doi: https://doi.org/10.1175/1520-0485(1999)029<2442:OTMCIT>2.0.CO;2
Byrne D, Münnich M, Frenger I, Gruber N. 2016. Mesoscale atmosphere ocean coupling enhances the transfer of wind energy into the ocean. Nature Communications, 7: s11867, doi: https://doi.org/10.1038/ncomms11867
Canuto V M, Cheng Y, Howard A M, et al. 2019. Three-dimensional, space-dependent mesoscale diffusivity: derivation and implications. Journal of Physical Oceanography, 49(4): 1055–1074, doi: https://doi.org/10.1175/JPO-D-18-0123.1
Chapman C, Sallée J B. 2017. Isopycnal mixing suppression by the Antarctic Circumpolar Current and the Southern Ocean meridional overturning circulation. Journal of Physical Oceanography, 47(8): 2023–2045, doi: https://doi.org/10.1175/JPO-D-16-0263.1
Chelton D B, de Szoeke R A, Schlax M G, et al. 1998. Geographical variability of the first baroclinic Rossby radius of deformation. Journal of Physical Oceanography, 28(3): 433–460, doi: https://doi.org/10.1175/1520-0485(1998)028<0433:GVOTFB>2.0.CO;2
Chelton D B, Schlax M G, Samelson R M. 2011. Global observations of nonlinear mesoscale eddies. Progress in Oceanography, 91(2): 167–216, doi: https://doi.org/10.1016/j.pocean.2011.01.002
Chen Ru, Flierl G R, Wunsch C. 2014. A description of local and non-local eddy-mean flow interaction in a global eddy-permitting state estimate. Journal of Physical Oceanography, 44(9): 2336–2352, doi: https://doi.org/10.1175/JPO-D-14-0009.1
Chen Gengxin, Gan Jianping, Xie Qiang, et al. 2012. Eddy heat and salt transports in the South China Sea and their seasonal modulations. Journal of Geophysical Research: Oceans, 117: C05021
Chen Gengxin, Hou Yijun, Chu Xiaoqing. 2011. Mesoscale eddies in the South China Sea: Mean properties, spatiotemporal variability, and impact on thermohaline structure. Journal of Geophysical Research: Oceans, 116: C06018
Chiswell S M. 2013. Lagrangian time scales and eddy diffusivity at 1000 m compared to the surface in the South Pacific and Indian oceans. Journal of Physical Oceanography, 43(12): 2718–2732, doi: https://doi.org/10.1175/JPO-D-13-044.1
Couvelard X, Caldeira R M A, Araújo I B, et al. 2012. Wind mediated vorticity-generation and eddy-confinement, leeward of the Madeira Island: 2008 numerical case study. Dynamics of Atmospheres and Oceans, 58: 128–149, doi: https://doi.org/10.1016/j.dynatmoce.2012.09.005
Dawson H R S, Strutton P G, Gaube P. 2018. The unusual surface chlorophyll signatures of Southern Ocean eddies. Journal of Geophysical Research: Oceans, 123(9): 6053–6069, doi: https://doi.org/10.1029/2017JC013628
Dong Changming, Lin Xiayan, Liu Yu, et al. 2012. Three-dimensional oceanic eddy analysis in the Southern California Bight from a numerical product. Journal of Geophysical Research: Oceans, 117(C7): C00H14
Dong Changming, McWilliams J C, Liu Yu, et al. 2014. Global heat and salt transports by eddy movement. Nature Communications, 5: 3294, doi: https://doi.org/10.1038/ncomms4294
Eden C. 2006. Thickness diffusivity in the Southern Ocean. Geophysical Research Letters, 33(11): L11606
Eden C, Greatbatch R J. 2008. Towards a mesoscale eddy closure. Ocean Modelling, 20(3): 223–239, doi: https://doi.org/10.1016/j.ocemod.2007.09.002
Eden C, Greatbatch R J, Willebrand J. 2007. A diagnosis of thickness fluxes in an eddy-resolving model. Journal of Physical Oceanography, 37(3): 727–742, doi: https://doi.org/10.1175/JPO2987.1
Ellwood M J, Strzepek R F, Strutton P G, et al. 2020. Distinct iron cycling in a Southern Ocean eddy. Nature Communications, 11: 825, doi: https://doi.org/10.1038/s41467-020-14464-0
Ferrari R, Wunsch C. 2009. Ocean circulation kinetic energy: reservoirs, sources, and sinks. Annual Review of Fluid Mechanics, 41: 253–282, doi: https://doi.org/10.1146/annurev.fluid.40.111406.102139
Fox-Kemper B, Adcroft A, Böning CW, et al. 2019. Challenges and prospects in ocean circulation models. Frontiers in Marine Science, 6: 65, doi: https://doi.org/10.3389/fmars.2019.00065
Frenger I, Gruber N, Knutti R, et al. 2013. Imprint of Southern Ocean eddies on winds, clouds and rainfall. Nature Geoscience, 6: 608–612, doi: https://doi.org/10.1038/ngeo1863
Frenger I, Münnich M, Gruber N. 2018. Imprint of Southern Ocean mesoscale eddies on chlorophyll. Biogeosciences, 15: 4781–4798, doi: https://doi.org/10.5194/bg-15-4781-2018
Frenger I, Münnich M, Gruber N, et al. 2015. Southern Ocean eddy phenomenology. Journal of Geophysical Research: Oceans, 120(11): 7413–7449, doi: https://doi.org/10.1002/2015JC011047
Gent P R. 2011. The Gent-McWilliams parameterization: 20/20 hindsight. Ocean Modelling, 39(1–2): 2–9
Gent P R, McWilliams J C. 1990. Isopycnal mixing in ocean circulation models. Journal of Physical Oceanography, 20(1): 150–155, doi: https://doi.org/10.1175/1520-0485(1990)020<0150:IMIOCM>2.0.CO;2
Gordon A L, Molinelli E, Baker T. 1978. Large-scale relative dynamic topography of the Southern Ocean. Journal of Geophysical Research: Oceans, 83(C6): 3023–3032, doi: https://doi.org/10.1029/JC083iC06p03023
Griesel A, Eden C, Koopmann N, et al. 2015. Comparing isopycnal eddy diffusivities in the Southern Ocean with predictions from linear theory. Ocean Modelling, 94: 33–45, doi: https://doi.org/10.1016/j.ocemod.2015.08.001
Griesel A, McClean J L, Gille S T, et al. 2014. Eulerian and Lagrangian isopycnal eddy diffusivities in the Southern Ocean of an eddying model. Journal of Physical Oceanography, 44(2): 644–661, doi: https://doi.org/10.1175/JPO-D-13-039.1
Grooms I, Kleiber W. 2019. Diagnosing, modeling, and testing a multiplicative stochastic gent-mcwilliams parameterization. Ocean Modelling, 133: 1–10, doi: https://doi.org/10.1016/j.ocemod.2018.10.009
Haigh M, Sun Luolin, Shevchenko I, et al. 2020. Tracer-based estimates of eddy-induced diffusivities. Deep-Sea Research Part I: Oceanographic Research Papers, 160: 103264, doi: https://doi.org/10.1016/j.dsr.2020.103264
Haller G, Hadjighasem A, Farazmand M, et al. 2016. Defining coherent vortices objectively from the vorticity. Journal of Fluid Mechanics, 795: 136–173, doi: https://doi.org/10.1017/jfm.2016.151
Hausmann U, McGillicuddy D J Jr, Marshall J. 2017. Observed mesoscale eddy signatures in Southern Ocean surface mixed-layer depth. Journal of Geophysical Research: Oceans, 122(1): 617–635, doi: https://doi.org/10.1002/2016JC012225
He Qingyou, Zhan Haigang, Cai Shuqun, et al. 2018. A new assessment of mesoscale eddies in the South China Sea: surface features, three-dimensional structures, and thermohaline transports. Journal of Geophysical Research: Oceans, 123(7): 4906–4929, doi: https://doi.org/10.1029/2018JC014054
Hu Jianyu, Gan Jianping, Sun Zhenyu, et al. 2011. Observed three-dimensional structure of a cold eddy in the southwestern South China Sea. Journal of Geophysical Research: Oceans, 116: C05016
Jackett D R, McDougall T J. 1997. A neutral density variable for the world’s oceans. Journal of Physical Oceanography, 27(2): 237–263, doi: https://doi.org/10.1175/1520-0485(1997)027<0237:ANDVFT>2.0.CO;2
Ji Jinlin, Dong Changming, Zhang Biao, et al. 2017. An oceanic eddy statistical comparison using multiple observational data in the Kuroshio Extension Region. Acta Oceanologica Sinica, 36(3): 1–7, doi: https://doi.org/10.1007/s13131-016-0882-1
Klocker A, Abernathey R. 2014. Global patterns of mesoscale eddy properties and diffusivities. Journal of Physical Oceanography, 44(3): 1030–1046, doi: https://doi.org/10.1175/JPO-D-13-0159.1
Klocker A, Marshall D P. 2014. Advection of baroclinic eddies by depth mean flow. Geophysical Research Letters, 41(10): 3517–3521, doi: https://doi.org/10.1002/2014GL060001
LaCasce J H, Ferrari R, Marshall J, et al. 2014. Float-derived isopycnal diffusivities in the DIMES experiment. Journal of Physical Oceanography, 44(2): 764–780, doi: https://doi.org/10.1175/JPO-D-13-0175.1
Li Qiuyang, Sun Liang, Xu Chi. 2018. The lateral eddy viscosity derived from the decay of oceanic mesoscale eddies. Open Journal of Marine Science, 8: 152–172, doi: https://doi.org/10.4236/ojms.2018.81008
Lin Xiayan, Dong Changming, Chen Dake, et al. 2015. Three-dimensional properties of mesoscale eddies in the South China Sea based on eddy-resolving model output. Deep-Sea Research Part I: Oceanographic Research Papers, 99: 46–64, doi: https://doi.org/10.1016/j.dsr.2015.01.007
Liu Yu, Dong Changming, Liu Xiaohui, et al. 2017. Antisymmetry of oceanic eddies across the Kuroshio over a shelfbreak. Scientific Reports, 7(1): 6761, doi: https://doi.org/10.1038/s41598-017-07059-1
Lu Jianhua, Speer K. 2010. Topography, jets, and eddy mixing in the Southern Ocean. Journal of Marine Research, 68(3–4): 479–502
Lu Jianhua, Wang Fuchang, Liu Hailong, et al. 2016. Stationary mesoscale eddies, upgradient eddy fluxes, and the anisotropy of eddy diffusivity. Geophysical Research Letters, 43(2): 743–751, doi: https://doi.org/10.1002/2015GL067384
Mak J, Maddison J R, Marshall D P. 2016. A new gauge-invariant method for diagnosing eddy diffusivities. Ocean Modelling, 104: 252–268, doi: https://doi.org/10.1016/j.ocemod.2016.06.006
Marshall D P, Maddison J R, Berlo P S. 2012. A framework for parameterizing eddy potential vorticity fluxes. Journal of Physical Oceanography, 42(4): 539–557, doi: https://doi.org/10.1175/JPO-D-11-048.1
Marshall J, Shuckburgh E, Jones H, et al. 2006. Estimates and implications of surface eddy diffusivity in the Southern Ocean derived from tracer transport. Journal of Physical Oceanography, 36(9): 1806–1821, doi: https://doi.org/10.1175/JPO2949.1
Marshall J, Shutts G. 1981. A note on rotational and divergent eddy fluxes. Journal of Physical Oceanography, 11(12): 1677–1680, doi: https://doi.org/10.1175/1520-0485(1981)011<1677:ANORAD>2.0.CO;2
Mazloff M R, Heimbach P, Wunsch C. 2010. An eddy-permitting Southern Ocean State Estimate. Journal of Physical Oceanography, 40(5): 880–899, doi: https://doi.org/10.1175/2009JPO4236.1
McDougall T J. 1987. Neutral surface. Journal of Physical Oceanography, 17(11): 1950–1964, doi: https://doi.org/10.1175/1520-0485(1987)017<1950:NS>2.0.CO;2
McDougall T J, McIntosh P C. 1996. The temporal-residual-mean velocity. Part I: Derivation and the scalar conservation equations. Journal of Physical Oceanography, 26(12): 2653–2665, doi: https://doi.org/10.1175/1520-0485(1996)026<2653:TTRMVP>2.0.CO;2
McDougall T J, McIntosh P C. 2001. The temporal-residual-mean velocity. Part II: Isopycnal interpretation and the tracer and momentum equations. Journal of Physical Oceanography, 31(5): 1222–1246, doi: https://doi.org/10.1175/1520-0485(2001)031<1222:TTRMVP>2.0.CO;2
Medvedev A S, Greatbatch R J. 2004. On advection and diffusion in the mesosphere and lower thermosphere: The role of rotational fluxes. Journal of Geophysical Research: Atmospheres, 109: D07104
Moreau S, Penna A D, Llort J, et al. 2017. Eddy-induced carbon transport across the Antarctic Circumpolar Current. Global Biogeochemical Cycles, 31(9): 1368–1386, doi: https://doi.org/10.1002/2017GB005669
Nencioli F, Dong Changming, Dickey T, et al. 2010. A vector geometry-based eddy detection algorithm and its application to a high-resolution numerical model product and high-frequency radar surface velocities in the Southern California Bight. Journal of Atmospheric and Oceanic Technology, 27(3): 564–579, doi: https://doi.org/10.1175/2009JTECHO725.1
Ni Qinbiao, Zhai Xiaoming, Wang Guihua, et al. 2020. Random movement of mesoscale eddies in the global ocean. Journal of Physical Oceanography, 50(8): 2341–2357, doi: https://doi.org/10.1175/JPO-D-19-0192.1
Nummelin A, Busecke J J M, Haine T W N, et al. 2021. Diagnosing the scale- and space-dependent horizontal eddy diffusivity at the global surface ocean. Journal of Physical Oceanography, 51(2): 279–297, doi: https://doi.org/10.1175/JPO-D-19-0256.1
Okubo A. 1970. Horizontal dispersion of floatable particles in the vicinity of velocity singularities such as convergences. Deep-Sea Research and Oceanographic Abstracts, 17(3): 445–454, doi: https://doi.org/10.1016/0011-7471(70)90059-8
Orsi A H, Nowlin W D Jr, Whitworth T III. 1993. On the circulation and stratification of the weddell gyre. Deep-Sea Research Part I: Oceanographic Research Papers, 40(1): 169–203, doi: https://doi.org/10.1016/0967-0637(93)90060-G
Patel R S, Llort J, Strutton P G, et al. 2020. The biogeochemical structure of Southern Ocean mesoscale eddies. Journal of Geophysical Research: Oceans, 125(8): e2020JC016115
Poulsen M B, Jochum M, Nuterman R. 2018. Parameterized and resolved Southern Ocean eddy compensation. Ocean Modelling, 124: 1–15, doi: https://doi.org/10.1016/j.ocemod.2018.01.008
Pujol M I, Faugère Y, Taburet G, et al. 2016. DUACS DT2014: The new multi-mission altimeter data set reprocessed over 20 years. Ocean Science, 12: 1067–1090, doi: https://doi.org/10.5194/os-12-1067-2016
Rhines P B. 2001. Mesoscale eddies. In: Steele M, Turekian K K, Thorpe S A, eds. Encyclopedia of Ocean Science. San Diego, CA, USA: Academic Press, 1982–1992
Rohr T, Harrison C, Long M C, et al. 2020. The simulated biological response to Southern Ocean eddies via biological rate modification and physical transport. Global Biogeochemical Cycles, 34(6): e2019GB006385
Rypina I I, Kirincich A, Lentz S, et al. 2016. Investigating the eddy diffusivity concept in the coastal ocean. Journal of Physical Oceanography, 46(7): 2201–2218, doi: https://doi.org/10.1175/JPO-D-16-0020.1
Sadarjoen I A, Post F H. 2000. Detection, quantification, and tracking of vortices using streamline geometry. Computers & Graphics, 24(3): 333–341
Solovev M, Stone P H, Malanotte-Rizzoli P. 2002. Assessment of mesoscale eddy parameterizations for a single-basin coarse-resolution ocean model. Journal of Geophysical Research: Oceans, 107(C9): 9–1–9–19
Song H, Long M C, Gaube P, et al. 2018. Seasonal variation in the correlation between anomalies of sea level and chlorophyll in the Antarctic Circumpolar Current. Geophysical Research Letters, 45(10): 5011–5019, doi: https://doi.org/10.1029/2017GL076246
Stammer D. 1997. Global characteristics of ocean variability estimated from regional TOPEX/POSEIDON altimeter measurements. Journal of Physical Oceanography, 27(8): 1743–1769, doi: https://doi.org/10.1175/1520-0485(1997)027<1743:GCOOVE>2.0.CO;2
Stanley Z, Bachman S D, Grooms I. 2020. Vertical structure of ocean mesoscale eddies with implications for parameterizations of tracer transport. Journal of Advances in Modeling Earth Systems, 12(10): e2020MS002151
Sun Wenjin, Dong Changming, Tan Wei, et al. 2018. Vertical structure anomalies of oceanic eddies and eddy-induced transports in the South China Sea. Remote Sensing, 10(5): 795, doi: https://doi.org/10.3390/rs10050795
Sun Wenjin, Dong Changming, Tan Wei, et al. 2019. Statistical characteristics of cyclonic warm-core eddies and anticyclonic cold-core eddies in the North Pacific based on remote sensing data. Remote Sensing, 11(2): 208, doi: https://doi.org/10.3390/rs11020208
Sun Wenjin, Dong Changming, Wang Ruyun, et al. 2017. Vertical structure anomalies of oceanic eddies in the Kuroshio Extension region. Journal of Geophysical Research: Oceans, 122(2): 1476–1496, doi: https://doi.org/10.1002/2016JC012226
Treguier A M, Held I M, Larichev V D. 1997. Parameterization of quasigeostrophic eddies in primitive equation ocean models. Journal of Physical Oceanography, 27(4): 567–580, doi: https://doi.org/10.1175/1520-0485(1997)027<0567:POQEIP>2.0.CO;2
Visbeck M, Marshall J, Haine T, et al. 1997. Specification of eddy transfer coefficients in coarse-resolution ocean circulation models. Journal of Physical Oceanography, 27(3): 381–402, doi: https://doi.org/10.1175/1520-0485(1997)027<0381:SOETCI>2.0.CO;2
Vollmer L, Eden C. 2013. A global map of meso-scale eddy diffusivities based on linear stability analysis. Ocean Modelling, 72: 198–209, doi: https://doi.org/10.1016/j.ocemod.2013.09.006
Waite A M, Stemmann L, Guidi L, et al. 2016. The wineglass effect shapes particle export to the deep ocean in mesoscale eddies. Geophysical Research Letters, 43(18): 9791–9800, doi: https://doi.org/10.1002/2015GL066463
Wang Zifeng, Li Qiuyang, Sun Liang, et al. 2015. The most typical shape of oceanic mesoscale eddies from global satellite sea level observations. Frontiers of Earth Science, 9: 202–208, doi: https://doi.org/10.1007/s11707-014-0478-z
Weiss J. 1991. The dynamics of enstrophy transfer in two-dimensional hydrodynamics. Physica D: Nonlinear Phenomena, 48(2–3): 273–294
Wolfram P J, Ringler T D, Maltrud M E, et al. 2015. Diagnosing isopycnal diffusivity in an eddying, idealized midlatitude ocean basin via lagrangian, in situ, global, high-performance particle tracking (LIGHT). Journal of Physical Oceanography, 45(8): 2114–2133, doi: https://doi.org/10.1175/JPO-D-14-0260.1
Yang Xiao, Xu Guangjun, Liu Yu, et al. 2020. Multi-source data analysis of mesoscale eddies and their effects on surface chlorophyll in the Bay of Bengal. Remote Sensing, 12(21): 3485, doi: https://doi.org/10.3390/rs12213485
Ying Y K, Maddison J R, Vanneste J. 2019. Bayesian inference of ocean diffusivity from lagrangian trajectory data. Ocean Modelling, 140: 101401, doi: https://doi.org/10.1016/j.ocemod.2019.101401
Zhang Zhiwei, Tian Jiwei, Qiu Bo, et al. 2016. Observed 3D structure, generation, and dissipation of oceanic mesoscale eddies in the South China Sea. Scientific Reports, 6: 24349, doi: https://doi.org/10.1038/srep24349
Zhang Zhengguang, Wang Wei, Qiu Bo. 2014. Oceanic mass transport by mesoscale eddies. Science, 345(6194): 322–324, doi: https://doi.org/10.1126/science.1252418
Zhang Zhengguang, Zhang Yu, Wang Wei, et al. 2013. Universal structure of mesoscale eddies in the ocean. Geophysical Research Letters, 40(14): 3677–3681, doi: https://doi.org/10.1002/grl.50736
Acknowledgements
The Southern Ocean State Estimate (SOSE) data are downloaded from http://sose.ucsd.edu/sose_stateestimation_data_08.html, and computational resources for SOSE are supported by NSF XSEDE resource grant (OCE130007). The altimeter products are produced by the Ssalto/Duacs and distributed by AVISO, with support from the Centre National d’Etudes Spatiales (http://www.aviso.oceanobs.com/duacs/). We thank Hailong Liu (Institute of Atmospheric Physicals, Chinese Academy of Sciences), Jianhua Lu (Sun Yat-Sen University) and Fuchang Wang (Shanghai Jiao Tong University) for the constructive discussion. We thank Matthew Mazloff (Scripps Institution of Oceanography) for the kindly help in data download. We also thank two anonymous reviewers for their constructive comments and helpful suggestions.
Funding
Foundation item: The National Key Research Programs of China under contract No. 2017YFA0604100; the National Natural Science Foundation of China under contract Nos 41906008, 41806039 and 41706205; the Open Fund of State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, MNR under contract No. QNHX2022; the Startup Foundation for Introducing Talent of Nanjing University of Information Science & Technology under contract No. 2019r049; the Startup Foundation for Introducing Talent of Zhejiang Ocean University; the Innovation Group Project of Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai) under contract No. 311020004.
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Sun, W., Yang, J., Tan, W. et al. Eddy diffusivity and coherent mesoscale eddy analysis in the Southern Ocean. Acta Oceanol. Sin. 40, 1–16 (2021). https://doi.org/10.1007/s13131-021-1881-4
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DOI: https://doi.org/10.1007/s13131-021-1881-4