Articles | Volume 17, issue 2
https://doi.org/10.5194/os-17-487-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/os-17-487-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
18 Mar 2021
Research article |
| 18 Mar 2021
| 18 Mar 2021
Imprint of chaotic ocean variability on transports in the southwestern Pacific at interannual timescales
LEGOS, Université de Toulouse, IRD, CNES, CNRS, UPS, Toulouse, France
Guillaume Serazin
Climate Change Research Center, University of New South Wales, Sydney,
Australia
Thierry Penduff
Université Grenoble Alpes, CNRS, IRD, Grenoble-INP, Institut des
Géosciences de l'Environnement (IGE), Grenoble, France
Christophe Menkes
ENTROPIE, IRD, CNRS, UR, UNC, Ifremer, Nouméa, New Caledonia
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Cited articles
Alberty, M., Sprintall, J., MacKinnon, J., Germineaud, C., Cravatte, S., and
Ganachaud, A.: Moored Observations of Transport in the Solomon Sea, J.
Geophys. Res.-Oceans, 124, 8166–8192, https://doi.org/10.1029/2019JC015143, 2019.
Arbic, B. K., Müller, M., Richman, J. G., Shriver, J. F., Morten, A. J., Scott, R. B., Sérazin, G., and Penduff, T.: Geostrophic turbulence in the frequency–wavenumber domain: Eddy-driven low-frequency variability, J. Phys. Oceanogr., 44, 2050–2069, https://doi.org/10.1175/JPO-D-13-054.1, 2014.
Belmadani, A., Concha, E., Donoso, D., Chaigneau, A., Colas, F., Maximenko, N., and Di Lorenzo, E.: Striations and preferred eddy tracks triggered by
topographic steering of the background flow in the eastern South Pacific:
Southeast Pacific striations and eddies, J. Geophys. Res.-Oceans, 122,
2847–2870, https://doi.org/10.1002/2016JC012348, 2017.
Berloff P., Kamenkovich, I., and Pedlosky, J.: A model of multiple zonal jets
in the oceans: Dynamical and kinematical analysis, J. Phys. Oceanogr., 39,
2711–2734, https://doi.org/10.1175/2009JPO4093.1, 2009.
Berloff P., Karabasov, S., Farrar, J. T., and Kamenkovich, I.: On latency of
multiple zonal jets in the oceans, J. Fluid Mech., 686, 534–567,
https://doi.org/10.1017/jfm.2011.345, 2011.
Bessières, L., Leroux, S., Brankart, J.-M., Molines, J.-M., Moine, M.-P., Bouttier, P.-A., Penduff, T., Terray, L., Barnier, B., and Sérazin, G.: Development of a probabilistic ocean modelling system based on NEMO 3.5: application at eddying resolution, Geosci. Model Dev., 10, 1091–1106, https://doi.org/10.5194/gmd-10-1091-2017, 2017.
Bonjean, F. and Lagerloef, G. S. E.: Diagnostic Model and Analysis of the
Surface Currents in the Tropical Pacific Ocean, J. Phys. Oceanogr., 32, 2938–2954, 2002.
Brankart, J.-M., Candille, G., Garnier, F., Calone, C., Melet, A., Bouttier, P.-A., Brasseur, P., and Verron, J.: A generic approach to explicit simulation of uncertainty in the NEMO ocean model, Geosci. Model Dev., 8, 1285–1297, https://doi.org/10.5194/gmd-8-1285-2015, 2015.
Bull, C. Y. S., Kiss, A. E., Jourdain, N. C., England, M. H., and van
Sebille, E.: Wind forced variability in eddy formation, eddy
shedding, and the separation of the East Australian Current,
J. Geophys. Res.-Oceans, 122, 9980–9998, https://doi.org/10.1002/2017JC013311, 2017.
Cai, W.: Antarctic ozone depletion causes an intensification of the southern ocean super-gyre circulation, Geophys. Res. Lett., 33, L03712, https://doi.org/10.1029/2005GL024911, 2006.
Ceccarelli, D. M., McKinnon, A. D., Andrefouet, S., Allain, V., Young, J.,
Gledhill, D. C., Flynn, A., Bax, N. J., Beaman, R., Borsa, P., Brinkman, R.,
Bustamante, R. H., Campbell, R., Cappo, M., Cravatte, S., D'Agata, S.,
Dichmont, C. M., Dunstan, P. K., Dupouy, C., Edgar, G., Farman, R., Furnas, M., Garrigue, C., Hutton, T., Kulbicki, M., Letourneur, Y., Lindsay, D.,
Menkes, C., Mouillot, D., Parravicini, V., Payri, C., Pelletier, B., de
Forges, B. R., Ridgway, K., Rodier, M., Samadi, S., Schoeman, D., Skewes, T., Swearer, S., Vigliola, L., Wantiez, L., Williams, A., Williams, A., and
Richardson, A. J.: The Coral Sea: Physical Environment, Ecosystem Status and
Biodiversity Assets, Adv. Mar. Biol., 66, 213–290, 2013.
Cetina-Heredia, P., Roughan, M., van Sebille, E., and Coleman, M. A.:
Long-term trends in the East Australian Current separation latitude and eddy
driven transport, J. Geophys. Res.-Oceans, 119, 4351–4366,
https://doi.org/10.1002/2014JC010071, 2014.
Chen R. and Flierl, G. R.: The contribution of striations to the eddy energy
budget and mixing: Diagnostic frameworks and results in a quasigeostrophic
barotropic system with mean flow, J. Phys. Oceanogr., 45, 2095–2113,
https://doi.org/10.1175/JPO-D-14-0199.1, 2015.
Cleveland, W. S. and Devlin, S. J.: Locally weighted regression: An approach
to regression analysis by local fitting, J. Am. Stat. Assoc., 83,
596–610, https://doi.org/10.1080/01621459.1988.10478639, 1988.
Condie, S. A. and Dunn, J. R.: Seasonal characteristics of the surface mixed
layer in the Australasian region: implications for primary production
regimes and biogeography, Mar. Freshwater Res., 57, 569–590, 2006.
Couvelard, X., Marchesiello, P., Gourdeau, L., and Lefèvre, J.:
Barotropic Zonal Jets Induced by Islands in the Southwest Pacific, J. Phys.
Oceanogr., 38, 2185–2204, https://doi.org/10.1175/2008JPO3903.1, 2008.
Cravatte, S., Ganachaud, A., Duong, Q.-P., Kessler, W. S., Eldin, G., and
Dutrieux, P.: Observed circulation in the Solomon Sea from SADCP data, Prog.
Oceanogr., 88, 116–130, https://doi.org/10.1016/j.pocean.2010.12.015, 2011.
Cravatte, S., Kestenare, E., Eldin, G., Ganachaud, A., Lefevre, J., Marin, F., Menkes, C., and Aucan, J.: Regional circulation around New Caledonia from
two decades of observations, J. Marine Syst., 148, 249–271,
https://doi.org/10.1016/j.jmarsys.2015.03.004, 2015.
Davis, A., Di Lorenzo, E., Luo, H., Belmadani, A., Maximenko, N.,
Melnichenko, O., and Schneider, N.: Mechanisms for the emergence of ocean
striations in the North Pacific: Formation of North Pacific Striations,
Geophys. Res. Lett., 41, 948–953, https://doi.org/10.1002/2013GL057956, 2014.
Davis, R. E., Kessler, W. S., and Sherman, J. T.: Gliders Measure Western
Boundary Current Transport from the South Pacific to the Equator, J. Phys.
Oceanogr., 42, 2001–2013, https://doi.org/10.1175/JPO-D-12-022.1, 2012.
Dawson, A.: eofs: A Library for EOF Analysis of Meteorological,
Oceanographic, and Climate Data, Journal of Open Research Software, 4,
e14, https://doi.org/10.5334/jors.122, 2016.
Dussin, R., Barnier, B., Brodeau, L., and Molines, J. M.: The making of DRAKKAR
forcing set DFS5, DRAKKAR/My-Ocean Rep. 01-04-16, available at:
https://www.drakkar-ocean.eu/publications/reports/report_DFS5v3_April2016.pdf (last access: 9 March 2021),
34 pp., 2016.
Ganachaud, A., Gourdeau, L., and Kessler, W.: Bifurcation of the subtropical
south equatorial current against New Caledonia in December 2004 from a
hydrographic inverse box model, J. Phys. Oceanogr., 38, 2072–2084,
https://doi.org/10.1175/2008JPO3901.1, 2008.
Gasparin, F., Ganachaud, A., Maes, C., Marin, F., and Eldin, G.: Oceanic
transports through the Solomon Sea: The bend of the New Guinea Coastal
Undercurrent, Geophys. Res. Lett., 39, L15608, https://doi.org/10.1029/2012GL052575,
2012.
Godfrey, J. S.: A Sverdrup model of the depth-integrated flow for the world ocean allowing for island circulations, Geophys. Astrophys. Fluid Dyn., 45, 89–112, 1989.
Gourdeau, L., Kessler, W. S., Davis, R. E., Sherman, J., Maes, C., and
Kestenare, E.: Zonal jets entering the coral sea, J. Phys. Oceanogr., 38,
715–725, https://doi.org/10.1175/2007JPO3780.1, 2008.
Gregorio, S., Penduff, T., Serazin, G., Molines, J.-M., Barnier, B., and
Hirschi, J.: Intrinsic Variability of the Atlantic Meridional Overturning
Circulation at Interannual-to-Multidecadal Time Scales, J. Phys. Oceanogr., 45, 1929–1946, https://doi.org/10.1175/JPO-D-14-0163.1, 2015.
Hill, K. L., Rintoul, S. R., Coleman, R., and Ridgway, K. R.: Wind forced low
frequency variability of the East Australia Current, Geophys. Res. Lett., 35, L08602, https://doi.org/10.1029/2007GL032912, 2008.
Hill, K. L., Rintoul, S. R., Ridgway, K. R., and Oke, P. R.: Decadal changes
in the South Pacific western boundary current system revealed in
observations and ocean state estimates, J. Geophys. Res.-Oceans, 116,
C01009, https://doi.org/10.1029/2009JC005926, 2011.
Holbrook, N. J., Chan, P. S. L., and Venegas, S. A.: Oscillatory and propagating modes of temperature variability at the 3–3.5- and 4–4.5-year time scales in the upper Southwest Pacific Ocean, J. Clim., 18, 719–736, 1637–1639, 2005.
Holbrook, N. J., Goodwin, I. D., McGregor, S., Molina, E., and Power, S. B.:
ENSO to multi-decadal time scale changes in East Australian Current
transports and Fort Denison sea level: Oceanic Rossby waves as the
connecting mechanism, Deep-Sea Res. Part II, 58,
547–558, https://doi.org/10.1016/j.dsr2.2010.06.007, 2011.
Ishida, A., Kashino, Y., Hosoda, S., and Ando, K.: North-south asymmetry of
warm water volume transport related with El Nino variability, Geophys. Res.
Lett., 35, L18612, https://doi.org/10.1029/2008GL034858, 2008.
Jamet, Q., Dewar, W. K., Wienders, N., Deremble, B., Close, S., and Penduff, T.: Locally and remotely forced subtropical AMOC variability: a matter of time scales, J. Clim., 33, 5155–5172, https://doi.org/10.1175/JCLI-D-19-0844.1, 2020.
Keppler, L., Cravatte, S., Chaigneau, A., Pegliasco, C., Gourdeau, L., and
Singh, A.: Observed Characteristics and Vertical Structure of Mesoscale
Eddies in the Southwest Tropical Pacific, J. Geophys. Res.-Oceans, 123,
2731–2756, https://doi.org/10.1002/2017JC013712, 2018.
Kessler, W. S. and Gourdeau, L.: The annual cycle of circulation in the southwest subtropical Pacific, analyzed in an ocean GCM, J. Phys. Oceanogr., 37, 1610–1627, 2007.
Kessler, W. S. and Cravatte, S.: Mean circulation of the Coral Sea, J.
Geophys. Res.-Oceans, 118, 6385–6410, https://doi.org/10.1002/2013JC009117, 2013a.
Kessler, W. S. and Cravatte, S.: ENSO and Short-Term Variability of the
South Equatorial Current Entering the Coral Sea, J. Phys. Oceanogr., 43,
956–969, https://doi.org/10.1175/JPO-D-12-0113.1, 2013b.
Kessler, W. S., Hristova, H. G., and Davis, R. E.: Equatorward western
boundary transport from the South Pacific: Glider observations, dynamics and
consequences, Prog. Oceanogr., 175, 208–225,
https://doi.org/10.1016/j.pocean.2019.04.005, 2019.
Lacasce, J. H.: On turbulence and normal modes in a basin, J. Mar. Res., 60,
431–460, https://doi.org/10.1357/002224002762231160, 2002.
Lee, T. and Fukumori, I.: Interannual-to-decadal variations of
tropical-subtropical exchange in the Pacific Ocean: Boundary versus interior
pycnocline transports, J. Climate, 16, 4022–4042,
https://doi.org/10.1175/1520-0442(2003)016<4022:IVOTEI>2.0.CO;2,
2003.
Leroux, S., Penduff, T., Bessieres, L., Molines, J.-M., Brankart, J.-M.,
Serazin, G., Barnier, B., and Terray, L.: Intrinsic and Atmospherically
Forced Variability of the AMOC: Insights from a Large-Ensemble Ocean
Hindcast, J. Climate, 31, 1183–1203, https://doi.org/10.1175/JCLI-D-17-0168.1, 2018.
Llovel, W., Penduff, T., Meyssignac, B., Molines, J.-M., Terray, L.,
Bessieres, L., and Barnier, B.: Contributions of Atmospheric Forcing and
Chaotic Ocean Variability to Regional Sea Level Trends Over 1993–2015,
Geophys. Res. Lett., 45, 13405–13413, https://doi.org/10.1029/2018GL080838, 2018.
Madec, G. and NEMO System Team: NEMO ocean engine, Scientific Notes of Climate Modelling Center, 27, ISSN 1288-1619, Institut Pierre-Simon Laplace (IPSL), https://doi.org/10.5281/zenodo.1464816, 2008.
Mantua, N. J. and Hare, S. R.: The Pacific decadal oscillation, J. Oceanogr.,
58, 35–44, https://doi.org/10.1023/A:1015820616384, 2002.
Maximenko, N. A., Bang, B., and Sasaki, H.: Observational evidence of
alternating zonal jets in the world ocean, Geophys. Res. Lett., 32, L12607,
https://doi.org/10.1029/2005GL022728, 2005.
Melet, A., Gourdeau, L., Verron, J., and Djath, B.: Solomon Sea circulation
and water mass modifications: response at ENSO timescales, Ocean Dyn.,
63, 1–19, https://doi.org/10.1007/s10236-012-0582-0, 2013.
Nonaka, M., Sasaki, H., Taguchi, B., and Schneider, N.: Atmospheric-Driven and Intrinsic Interannual-to-Decadal Variability in the Kuroshio Extension Jet and Eddy Activities, Front. Mar. Sci., 7, 547442, https://doi.org/10.3389/fmars.2020.547442, 2020.
Oke, P. R., Roughan, M., Cetina-Heredia, P., Pilo, G. S., Ridgway, K. R.,
Rykova, T., Archer, M. R., Coleman, R. C., Kerry, C. G., Rocha, C.,
Schaeffer, A., and Vitarelli, E.: Revisiting the circulation of the East
Australian Current: Its path, separation, and eddy field, Prog. Oceanogr.,
176, 102139, https://doi.org/10.1016/j.pocean.2019.102139, 2019a.
Oke, P. R., Pilo, G. S., Ridgway, K., Kiss, A., and Rykova, T.. A search
for the Tasman Front, J. Marine Syst., 199, 103217,
https://doi.org/10.1016/j.jmarsys.2019.103217, 2019b.
Oliver, E. C. J. and Holbrook, N. J.: Extending our understanding of
South Pacific gyre “spin-up”: Modeling the East Australian Current in a
future climate, J. Geophys. Res.-Oceans, 119, 2788–2805,
https://doi.org/10.1002/2013JC009591, 2014.
Penduff, T., Barnier, B., Zika, J., Dewar, W. K., Treguier, A.-M.,
Molines, J.-M., and Audiffren, N.: Sea level expression of intrinsic and forced
ocean variabilities at interannual time scales, J. Climate, 24, 5652–5670,
https://doi.org/10.1175/JCLI-D-11-00077.1, 2011.
Penduff, T., Barnier, B., Terray, L., Bessières, L., Sérazin, G.,
Grégorio, S., Brankart, J.-M., Moine, M.-P., Molines, J.-M., and Brasseur, P.:
Ensembles of eddying ocean simulations for climate, CLIVAR Exchanges,
Special Issue on High Resolution Ocean Climate Modelling, 65, Vol. 19, No. 2,
July 2014.
Penduff, T., Serazin, G., Leroux, S., Close, S., Molines, J.-M., Barnier, B., Bessieres, L., Terray, L., and Maze, G.: Chaotic Variability of Ocean
Heat Content: Climate-Relevant Features and Observational Implications,
Oceanography, 31, 63–71, https://doi.org/10.5670/oceanog.2018.210, 2018.
Penduff, T., Llovel, W., Close, S., Garcia-Gomez, I., and Leroux, S.: Trends of
Coastal Sea Level Between 1993 and 2015: Imprints of Atmospheric Forcing and
Oceanic Chaos, Surv. Geophys., 40, 1543–1562, https://doi.org/10.1007/s10712-019-09571-7,
2019.
Qiu, B. and Chen, S. M.: Seasonal modulations in the eddy field of the South
Pacific Ocean, J. Phys. Oceanogr., 34, 1515–1527,
https://doi.org/10.1175/1520-0485(2004)034<1515:SMITEF>2.0.CO;2,
2004.
Qiu, B., Chen, S., and Kessler, W. S.: Source of the 70-Day Mesoscale Eddy
Variability in the Coral Sea and the North Fiji Basin, J. Phys. Oceanogr.,
39, 404–420, https://doi.org/10.1175/2008JPO3988.1, 2009.
Qu, T. D. and Lindstrom, E. J.: A climatological interpretation of the
circulation in the Western South Pacific, J. Phys. Oceanogr., 32, 2492–2508,
https://doi.org/10.1175/1520-0485(2002)032<2492:ACIOTC>2.0.CO;2, 2002.
Rayner, N. A., Parker, D. E., Horton, E. B., Folland, C. K., Alexander, L. V.,
Rowell, D. P., Kent, E. C., and Kaplan, A.: Global analyses of sea surface
temperature, sea ice, and night marine air temperature since the late
nineteenth century, J. Geophys. Res., 108, 4407
https://doi.org/10.1029/2002JD002670, 2003.
Renault, L., McWilliams, J. C., and Masson, S.: Satellite Observations of
Imprint of Oceanic Current on Wind Stress by Air-Sea Coupling, Sci. Rep.-UK, 7,
17747, https://doi.org/10.1038/s41598-017-17939-1, 2017.
Renault, L., Masson, S., Oerder, V., Jullien, S., and Colas, F.:
Disentangling the Mesoscale Ocean-Atmosphere Interactions, J. Geophys.
Res.-Oceans, 124, 2164–2178, https://doi.org/10.1029/2018JC014628, 2019.
Ridgway, K. R.: Long-term trend and decadal variability of the southward
penetration of the East Australian Current, Geophys. Res. Lett., 34, L13613, https://doi.org/10.1029/2007GL030393, 2007.
Ridgway, K. R. and Dunn, J. R.: Mesoscale structure of the mean East
Australian Current System and its relationship with topography, Prog.
Oceanogr., 56, 189–222, https://doi.org/10.1016/S0079-6611(03)00004-1, 2003.
Ridgway, K. R., Dunn, J. R., and Wilkin, J. L.: Ocean interpolation by
four-dimensional weighted least squares – application to the waters around
Australasia, J. Atmos. Ocean. Tech., 19, 1357–1375,
https://doi.org/10.1175/1520-0426(2002)019<1357:OIBFDW>2.0.CO;2,
2002.
Rieck, J. K., Boening, C. W., and Greatbatch, R. J.: Decadal Variability of
Eddy Kinetic Energy in the South Pacific Subtropical Countercurrent in an
Ocean General Circulation Model, J. Phys. Oceanogr., 48, 757–771,
https://doi.org/10.1175/JPO-D-17-0173.1, 2018.
Sasaki, Y. N., Minobe, S., Schneider, N., Kagimoto, T., Nonaka, M., and
Sasaki, H.: Decadal sea level variability in the South Pacific in a global
eddy-resolving ocean model hindcast, J. Phys. Oceanogr., 38, 1731–1747,
https://doi.org/10.1175/2007JPO3915.1, 2008.
Serazin, G., Penduff, T., Gregorio, S., Barnier, B., Molines, J.-M., and
Terray, L.: Intrinsic variability of sea level from global ocean simulations:
Spatiotemporal scales, J. Climate, 28, 4279–4292,
https://doi.org/10.1175/JCLI-D-14-00554.1, 2015.
Serazin, G., Meyssignac, B., Penduff, T., Terray, L., Barnier, B., and
Molines, J.-M.: Quantifying uncertainties on regional sea level change
induced by multidecadal intrinsic oceanic variability, Geophys. Res. Lett.,
43, 8151–8159, https://doi.org/10.1002/2016GL069273, 2016.
Serazin, G., Jaymond, A., Leroux, S., Penduff, T., Bessieres, L., Llovel, W., Barnier, B., Molines, J.-M., and Terray, L.: A global probabilistic study
of the ocean heat content low-frequency variability: Atmospheric forcing
versus oceanic chaos, Geophys. Res. Lett., 44, 5580–5589,
https://doi.org/10.1002/2017GL073026, 2017.
Serazin, G., Penduff, T., Barnier, B., Molines, J.-M., Arbic, B. K.,
Mueller, M., and Terray, L.: Inverse Cascades of Kinetic Energy as a Source
of Intrinsic Variability: A Global OGCM Study, J. Phys. Oceanogr., 48, 1385–1408, https://doi.org/10.1175/JPO-D-17-0136.1, 2018.
Sloyan, B. M., Ridgway, K. R., and Cowley, R.: The East Australian Current
and Property Transport at 27 degrees S from 2012 to 2013, J. Phys.
Oceanogr., 46, 993–1008, https://doi.org/10.1175/JPO-D-15-0052.1, 2016.
Sprintall, J., Cravatte, S., Dewitte, B., Du, Y., and Gupta, A. S.: ENSO Oceanic Teleconnections, in: El Niño Southern Oscillation in a Changing Climate, edited by: McPhaden, M. J., Santoso, A., and Cai, W., https://doi.org/10.1002/9781119548164.ch15, 2020.
Tchilibou, M., Gourdeau, L., Lyard, F., Morrow, R., Koch Larrouy, A., Allain, D., and Djath, B.: Internal tides in the Solomon Sea in contrasted ENSO conditions, Ocean Sci., 16, 615–635, https://doi.org/10.5194/os-16-615-2020, 2020.
Thompson, D. W. J. and Wallace, J. M.: Annular Modes in the Extratropical Circulation, Part I: Month-to-Month Variability, J. Clim., 13, 1000–1016, retrieved from: https://journals.ametsoc.org/view/journals/clim/13/5/1520-0442_2000_013_1000_amitec_2.0.co_2.xml (last access: 8 March 2021), 2000.
Travis, S. and Qiu, B.: Decadal Variability in the South Pacific Subtropical
Countercurrent and Regional Mesoscale Eddy Activity, J. Phys. Oceanogr.,
47, 499–512, https://doi.org/10.1175/JPO-D-16-0217.1, 2017.
van Sebille, E., England, M. H., Zika, J. D., and Sloyan, B. M.: Tasman
leakage in a fine-resolution ocean model, Geophys. Res. Lett., 39, L06601,
https://doi.org/10.1029/2012GL051004, 2012.
Zanna, L., Brankart, J. M., Huber, M., Leroux, S., Penduff, T., and
Williams, P. D.: Uncertainty and Scale Interactions in Ocean Ensembles: From
Seasonal Forecasts to Multi-Decadal Climate Predictions, Q. J. Roy. Meteor.
Soc., 2018, 1–16, https://doi.org/10.1002/qj.3397, 2018.
Zilberman, N. V., Roemmich, D. H., and Gille, S. T.: The Mean and the Time
Variability of the Shallow Meridional Overturning Circulation in the
Tropical South Pacific Ocean, J. Climate, 26, 4069–4087,
https://doi.org/10.1175/JCLI-D-12-00120.1, 2013.
Zilberman, N. V., Roemmich, D. H., and Gille, S. T.: Meridional volume
transport in the South Pacific: Mean and SAM-related variability, J.
Geophys. Res.-Oceans, 119, 2658–2678, https://doi.org/10.1002/2013JC009688, 2014.
Zilberman, N. V., Roemmich, D. H., Gille, S. T., and Gilson, J.: Estimating
the Velocity and Transport of Western Boundary Current Systems: A Case Study
of the East Australian Current near Brisbane, J. Atmos. Ocean.
Tech., 35, 1313–1329, https://doi.org/10.1175/JTECH-D-17-0153.1, 2018.
Short summary
The various currents in the southwestern Pacific Ocean contribute to the redistribution of waters from the subtropical gyre equatorward and poleward. The drivers of their interannual variability are not completely understood but are usually thought to be related to well-known climate modes of variability. Here, we suggest that oceanic chaotic variability alone, which is by definition unpredictable, explains the majority of this interannual variability south of 20° S.
The various currents in the southwestern Pacific Ocean contribute to the redistribution of...
