Abstract
Based on the Simple Ocean Data Assimilation (SODA) products, we study the mean properties and variations of the Southern Hemisphere subpolar gyres (SHSGs) in this paper. The results show that the gyre strengths in the SODA estimates are (55.9±9.8)×106 m3/s for the Weddell Gyre (WG), (37.0±6.4)×106 m3/s for the Ross Gyre (RG), and (27.5±8.2)×106 m3/s for the Australian-Antarctic Gyre (AG), respectively. There exists distinct connectivity between the adjacent gyres and then forms an oceanic super gyre structure in the southern subpolar oceans. And the interior exchanges are about (8.0±3.2)×106 m3/s at around 70°E and (4.3±3.1)×106 m3/s at around 140°E. The most pronounced variation for all three SHSGs occurs on the seasonal time scale, with generally stronger (weaker) SHSGs during austral winter (summer). And the seasonal changes of the gyre structures show that the eastern boundary of the WG and AG extends considerably further east during winter and the interior exchange in the super gyre structure increases accordingly. The WG and RG also show significant semi-annual changes. The correlation analyses confirm that the variations of the gyre strengths are strongly correlated with the changes in the local wind forcing on the semi-annual and seasonal time scales.
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Aoki S, Fujii N, Ushio S, et al. 2008. Deep western boundary current and southern frontal systems of the Antarctic Circumpolar Current southeast of the Kerguelen Plateau. Journal of Geophysical Research, 113(C8): 2092–2112
Aoki S, Sasai Y, Sasaki H, et al. 2010. The cyclonic circulation in the Australian-Antarctic basin simulated by an eddy-resolving general circulation model. Ocean Dynamics, 60(3): 743–757
Assmann K M, Timmermann R. 2005. Variability of dense water formation in the Ross Sea. Ocean Dynamics, 55(2): 68–87
Beckmann A, Hellmer H H, Timmermann R. 1999. A numerical model of the Weddell Sea: large-scale circulation and water mass distribution. Journal of Geophysical Research, 104(C10): 23375–23391
Bindoff N L, Rosenberg M A, Warner M J. 2000. On the circulation and water masses over the Antarctic continental slope and rise between 80 and 150°E. Deep Sea Research Part II: Topical Studies in Oceanography, 47(12–13): 2299–2326
Carton J A, Giese B S, Grodsky S A. 2005. Sea level rise and the warming of the oceans in the Simple Ocean Data Assimilation (SODA) ocean reanalysis. Journal of Geophysical Research: Oceans, 110(C9): doi: 10.1029/2004JC002817
Carton J A, Giese B S. 2008. A reanalysis of ocean climate using Simple Ocean Data Assimilation (SODA). Monthly Weather Review, 136(8): 2999–3017
Chu P C, Fan Chenwu. 2007. An inverse model for calculation of global volume transport from wind and hydrographic data. Journal of Marine Systems, 65(1–4): 376–399
Cisewski B, Strass V H, Leach H. 2011. Circulation and transport of water masses in the Lazarev Sea, Antarctica, during summer and winter 2006. Deep Sea Research Part I: Oceanographic Research Papers, 58(2): 186–199
Commodari V, Pierini S. 1999. A wind and boundary driven circulation model of the Ross Sea. In: Spezie G, Manzella G M R, eds. Oceanography of the Ross Sea Antarctica. Milano: Springer, 135–144
Couldrey M P, Jullion L, Garabato A C N, et al. 2013. Remotely induced warming of Antarctic Bottom Water in the eastern Weddell Gyre. Geophysical Research Letters, 40(11): 2755–2760
Dellnitz M, Froyland G, Horenkamp C, et al. 2009. Seasonal variability of the subpolar gyres in the Southern Ocean: a numerical investigation based on transfer operators. Nonlinear Processes in Geophysics, 16(6): 655–664
Drucker R, Martin S, Kwok R. 2011. Sea ice production and export from coastal polynyas in the Weddell and Ross Seas. Geophysical Research Letters, 38(17): L17502, 752–767
Duan Yongliang, Hou Yijun, Liu Hongwei, et al. 2013. The water mass variability and southward shift of the Southern Hemisphere mid-depth supergyre. Acta Oceanologica Sinica, 32(11): 74–81
Fahrbach E, Hoppema M, Rohardt G, et al. 2011. Warming of deep and abyssal water masses along the Greenwich Meridian on decadal time scales: the Weddell Gyre as a heat buffer. Deep Sea Research Part II: Topical Studies in Oceanography, 58(25–26): 2509–2523
Garabato A C N, Williams A P, Bacon S. 2014. The three-dimensional overturning circulation of the Southern Ocean during the WOCE era. Progress in Oceanography, 120: 41–78
Gordon A L, Martinson D G, Taylor H W. 1981. The wind-driven circulation in the Weddell-Enderby Basin. Deep Sea Research Part A: Oceanographic Research Papers, 28(2): 151–163
Gouretski V. 1999. The large-scale thermohaline structure of the Ross Gyre. In: Spezie G, Manzella G M R. Oceanography of the Ross Sea Antarctica. Milano: Springer, 77–100
Johns T C, Durman C F, Banks H T, et al. 2006. The new Hadley Centre climate model (HadGEM1): evaluation of coupled simulations. Journal of Climate, 19(7): 1327–1353
Jullion L, Jones S C, Garabato A C N, et al. 2010. Wind-controlled export of Antarctic Bottom Water from the Weddell Sea. Geophysical Research Letters, 37(9): 493–533
Jullion L, Garabato A C N, Bacon S, et al. 2014. The contribution of the Weddell Gyre to the lower limb of the Global Overturning Circulation. Journal of Geophysical Research, 119(6): 3357–3377
Klatt O, Fahrbach E, Hoppema M, et al. 2005. The transport of the Weddell Gyre across the Prime Meridian. Deep Sea Research Part II: Topical Studies in Oceanography, 52(3–4): 513–528
Liu Hongwei, Zhang Qilong, Duan Yongliang, et al. 2011. The threedimensional structure and seasonal variation of the north Pacific meridional overturning circulation. Acta Oceanologica Sinica, 30(3): 33–42
Mathiot P, Goosse H, Fichefet T, et al. 2011. Modelling the seasonal variability of the Antarctic Slope Current. Ocean Science, 7(4): 455–470
Mazloff M R, Heimbach P, Wunsch C. 2010. An eddy-permitting Southern Ocean state estimate. Journal of Physical Oceanography, 40(5): 880–899
McCartney M S, Donohue K A. 2007. A deep cyclonic gyre in the Australian-Antarctic Basin. Progress in the Oceanography, 75(4): 675–750
Meijers A J S, Klocker A, Bindoff N L, et al. 2010. The circulation and water masses of the Antarctic shelf and continental slope between 30 and 80°E. Deep Sea Research Part II: Topical Studies in Oceanography, 57(9–10): 723–737
Meredith M P, Garabato A C N, Gordon A L, et al. 2008. Evolution of the deep and bottom waters of the Scotia Sea, Southern Ocean, during 1995–2005. Journal of Climate, 21(13): 3327–3343
Núñez-Riboni I, Fahrbach E. 2009. Seasonal variability of the Antarctic Coastal Current and its driving mechanisms in the Weddell Sea. Deep Sea Research Part I: Oceanographic Research Papers, 56(11): 1927–1941
Orsi A H, Nowlin Jr W D, Whitworth III T. 1993. On the circulation and stratification of the Weddell Gyre. Deep Sea Research Part I: Oceanographic Research Papers, 40(1): 169–203
Park Y H, Vivier F, Roquet F, et al. 2009. Direct observations of the ACC transport across the Kerguelen Plateau. Geophysical Research Letters, 36(18): L18603 252–260
Purkey S G, Johnson G C. 2010. Warming of global abyssal and deep southern Ocean waters between the 1990s and 2000s: contributions to global heat and sea level rise budgets. Journal of Climate, 23(23): 6336–6351
Reid J L. 1997. On the total geostrophic circulation of the Pacific Ocean: flow patterns, tracers, and transports. Progress in Oceanography, 39(4): 263–352
Rickard G J, Roberts M J, Williams M J M, et al. 2010. Mean circulation and hydrography in the Ross Sea sector, Southern Ocean: representation in numerical models. Antarctic Science, 22(5): 533–558
Rintoul S R. 2007. Rapid freshening of Antarctic Bottom Water formed in the Indian and Pacific oceans. Geophysical Research Letters, 34(6): 125–141
Rodehacke C B, Hellmer H H, Beckmann A, et al. 2007. Formation and spreading of Antarctic deep and bottom waters inferred from a chlorofluorocarbon (CFC) simulation. Journal of Geophysical Research: Oceans, 112(C9): 244–245
Roquet F, Park Y H, Guinet C, et al. 2009. Observations of the Fawn Trough Current over the Kerguelen Plateau from instrumented elephant seals. Journal of Marine Systems, 78(3): 377–393
Russell J L, Stouffer R J, Dixon K W. 2006. Intercomparison of the Southern Ocean circulations in IPCC coupled model control simulations. Journal of Climate, 19(18): 4560–4575
Schröder M, Fahrbach E. 1999. On the structure and the transport of the eastern Weddell Gyre. Deep Sea Research Part II: Topical Studies in Oceanography, 46(1–2): 501–527
Sen Gupta A, Santoso A, Taschetto A S, et al. 2009. Projected changes to the Southern Hemisphere ocean and sea ice in the IPCC AR4 climate models. Journal of Climate, 22(11): 3047–3078
Shenoi S S C, Shankar D, Shetye S R. 2005. On the accuracy of the simple ocean data assimilation analysis for estimating heat budgets of the near-surface Arabian Sea and Bay of Bengal. Journal of Physical Oceanography, 35(3): 395–400
Sultan E, Mercier H, Pollard R T. 2007. An inverse model of the large scale circulation in the South Indian Ocean. Progress in Oceanography, 74(1): 71–94
Thorpe S E, Murphy E J, Watkins J L. 2007. Circumpolar connections between Antarctic krill (Euphausia superba Dana) populations: investigating the roles of ocean and sea ice transport. Deep Sea Research Part I: Oceanographic Research Papers, 54(5): 792–810
Wang Zhaomin, Meredith M P. 2008. Density-driven Southern Hemisphere subpolar gyres in coupled climate models. Geophysical Research Letters, 35(14): L14608, doi: 10.1029/2008GL034344
Wang Zhaomin. 2013. On the response of Southern Hemisphere subpolar gyres to climate change in coupled climate models. Journal of Geophysical Research, 118(3): 1070–1086
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Famdation item: The Shandong Provincial Natural Science Foundation, China under contract No. ZR2014DP011; the National Natural Science Foundation of China under contract No. 41406012; the Basic Scientific Research Fund for National Public Institutes of China under contract No. 2015G05; the Chinese Polar Science Strategy Research Foundation under contract NO. 20150305; the Open Fund of the Key Laboratory of Ocean Circulation and Waves, Chinese Academy of Sciences under contract No. KLOCAW1405.
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Duan, Y., Liu, H., Yu, W. et al. The mean properties and variations of the Southern Hemisphere subpolar gyres estimated by Simple Ocean Data Assimilation (SODA) products. Acta Oceanol. Sin. 35, 8–13 (2016). https://doi.org/10.1007/s13131-016-0901-2
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DOI: https://doi.org/10.1007/s13131-016-0901-2