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Fronts, baroclinic transport, and mesoscale variability of the Antarctic Circumpolar Current in the southeast Indian Ocean

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Abstract

Fronts, baroclinic transport, and mesoscale variability of the Antarctic Circumpolar Current (ACC) along 115°E are examined on the basis of CTD data from two hydrographic cruises occupied in 1995 as a part of the World Ocean Circulation Experiment (WOCE cruise I9S) and in 2004 as a part of CLIVAR/CO2 repeat hydrography program. The integrated baroclinic transport across I9S section is (97.2×106±2.2×106) m3/s relative to the deepest common level (DCL). The net transport at the north end of I9S, determined by the south Australian circulation system, is about 16.5×106 m3/s westward. Relying on a consistent set of water mass criteria and transport maxima, the ACC baroclinic transport, (117×106±6.7×106) m3/s to the east, is carried along three fronts: the Subantarctic Front (SAF) at a mean latitude of 44°–49°S carries (50.6×106±13.4×106) m3/s; the Polar Front (PF), with the northern branch (PF-N) at 50.5°S and the southern branch (PFS) at 58°S, carries (51.3×106±8.7×106) m3/s; finally, the southern ACC front (SACCF) and the southern boundary of the ACC (SB) consist of three cores between 59°S and 65°S that combined carry (15.2×106±1.8×106) m3/s. Mesoscale eddy features are identifiable in the CTD sections and tracked in concurrent maps of altimetric sea level anomalies (SLA) between 44°–48°S and 53°–57°S. Because of the remarkable mesoscale eddy features within the SAF observed in both the tracks of the cruises, the eastward transport of the SAF occurs at two latitude bands separating by 1°. Both the CTD and the altimetric data suggest that the mesoscale variability is concentrated around the Antarctic Polar Frontal Zone (APFZ) and causes the ACC fronts to merge, diverge, and to fluctuate in intensity and position along their paths.

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References

  • Aoki S, Akitomo K. 2007. Observations of small-scale disturbances of the Subantarctic Front south of Australia. Deep-Sea Research: Part I, 54(3): 320–339

    Article  Google Scholar 

  • Belkin I M, Gordon A. 1996. Southern Ocean fronts from the Greenwich meridian to Tasmania. Journal of Geophysical Research, 101(C2): 3675–3696

    Article  Google Scholar 

  • Cunningham S A, Alderson S G, King B A, et al. 2003. Transport and variability of the Antarctic Circumpolar Current in Drake Passage. Journal of Geophysical Research, 108(C5): 8084, doi:10.1029/2001001147

    Article  Google Scholar 

  • Fu L L. 2003. Wind-forced intraseasonal sea level variability of the extratropical oceans. Journal of Physical Oceanography, 33(2): 436–449

    Article  Google Scholar 

  • Gladyshev S, Arhan M, Sokov A, et al. 2008. A hydrographic section from South Africa to the southern limit of the Antarctic Circumpolar Current at the Greenwich meridian. Deep-Sea Research: Part I, 55(10): 1284–1303

    Article  Google Scholar 

  • He Zhigang, Dong Zhaoqian. 2010. Fronts and surface zonal geostrophic current along 115°E in the southern Indian Ocean. Acta Oceanologica Sinica, 29(5): 1–9

    Article  Google Scholar 

  • He Zhigang, Dong Zhaoqian, Pu Shuzhen. 2007. Seasonal variations of the front paths and wind field in the Southeast Indian Ocean and their relations. Acta Oceanologica Sinica (in Chinese), 29(2): 18–24

    Google Scholar 

  • He Zhigang, Dong Zhaoqian, Yuan Xiaojun. 2006. Fronts and strong currents of the upper southeast Indian Ocean. Acta Oceanologica Sinica, 25(2): 1–24

    Google Scholar 

  • Kostianoy A G, Ginzburg A I, Lebedev S A, et al. 2003. Fronts and mesoscale variability in the Southern Indian Ocean as inferred from the TOPEX/POSEIDON and ERS-2 altimetry data. Oceanology, 43(5): 632–642

    Google Scholar 

  • Maximenko N A, Niiler P P. 2005. Hybrid decade-mean global sea level with mesoscale resolution. In: Saxena N, ed. Recent Advances in Marine Science and Technology, 2004. Honolulu: PACON International, 55–59

    Google Scholar 

  • McCartney M S, Donohue K A. 2007. A deep cyclonic gyre in the Australian-Antarctic Basin. Progress in Oceanography, 75(4): 675–750

    Article  Google Scholar 

  • Moore J K, Abbott M R, Richman J G. 1999. Location and dynamics of the Antarctic Polar Front from satellite sea surface temperature data. Journal of Geophysical Research, 104(C2): 3059–3073

    Article  Google Scholar 

  • Morrow R, Donguy J R, Chaigneau A, et al. 2004. Cold core anomalies at the Subantarctic Front, south of Tasmania. Deep-Sea Research: Part I, 51(11): 1417–1440

    Google Scholar 

  • Orsi A H, Whitworth T III, Nowlin Jr W D. 1995. On the meridional extent and fronts of the Antarctic Circumpolar Current. Deep-Sea Research: Part I, 42(5): 641–673

    Article  Google Scholar 

  • Phillips H E, Rintoul S R. 2000. Eddy variability and energetics from direct current measurements in the Antarctic Circumpolar Current south of Australia. Journal of Physical Oceanography, 30(12): 3050–3076

    Article  Google Scholar 

  • Rintoul S R, Sokolov S. 2001. Baroclinic transport variability of the Antarctic Circumpolar Current south of Australia (WOCE repeat section SR3). Journal of Geophysical Research, 106(C2): 2815–2832

    Article  Google Scholar 

  • Rintoul S R, Trull T W. 2001. Seasonal evolution of the mixed layer in the Subantarctic Zone south of Australia. Journal of Geophysical Research, 106(C12): 31447–31462

    Article  Google Scholar 

  • Savchenko V G, Emery W G, Vladimirov O A. 1978. A cyclonic eddy in the Antarctic Circumpolar Current south of Australia. Journal of Physical Oceanography, 8(5): 825–837

    Article  Google Scholar 

  • Schodlok M P, Tomczak M, White N. 1997. Deep sections through the South Australian Basin and across the Australian-Antarctic Discordance. Geophysical Research Letters, 24(22): 2785–2788

    Article  Google Scholar 

  • Sokolov S, Rintoul S R. 2002. Structure of Southern Ocean fronts at 140°E. Journal of Marine Research, 37(1–3): 151–184

    Google Scholar 

  • Sokolov S, Rintoul S R. 2007. Multiple jets of the Antarctic Circumpolar Current south of Australia. Journal of Physical Oceanography, 37(5): 1394–1412

    Article  Google Scholar 

  • Sokolov S, Rintoul S R. 2009a. Circumpolar structure and distribution of the Antarctic Circumpolar Current fronts: 1. Mean circumpolar paths. Journal of Geophysical Research, 114: C11018, doi:10.1029/2008JC005108

    Article  Google Scholar 

  • Sokolov S, Rintoul S R. 2009b. Circumpolar structure and distribution of the Antarctic Circumpolar Current fronts: 2. Variability and relationship to sea surface height. Journal of Geophysical Research, 114: C11019, doi:10.1029/2008JC005248

    Article  Google Scholar 

  • Sprintall J. 2003. Seasonal to interannual upper-ocean variability in the Drake Passage. Journal of Marine Research, 61(1): 27–57

    Article  Google Scholar 

  • Yuan Xiaojun, Martinson D G, Dong Zhaoqian. 2004. Upper ocean thermohaline structure and its temporal variability in the southeast Indian Ocean. Deep-Sea Research: Part I, 51(2): 333–347

    Article  Google Scholar 

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Authors and Affiliations

  1. Institute of Oceanology, Chinese Academy of Sciences, Qingdao, 266071, China

    Yongliang Duan, Yijun Hou, Hongwei Liu & Po Hu

  2. Key Laboratory of Ocean Circulation and Waves, Chinese Academy of Sciences, Qingdao, 266071, China

    Yongliang Duan, Yijun Hou, Hongwei Liu & Po Hu

  3. University of Chinese Academy of Sciences, Beijing, 100049, China

    Yongliang Duan & Hongwei Liu

Authors
  1. Yongliang Duan
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  2. Yijun Hou
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  3. Hongwei Liu
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  4. Po Hu
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Corresponding author

Correspondence to Yijun Hou.

Additional information

Foundation item: The National High Technology Research and Development Program (“863” Program) of China under contract Nos 2008AA121701 and 2007AA092201; the National Natural Science Foundation of China under contract No.41006013.

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Duan, Y., Hou, Y., Liu, H. et al. Fronts, baroclinic transport, and mesoscale variability of the Antarctic Circumpolar Current in the southeast Indian Ocean. Acta Oceanol. Sin. 31, 1–11 (2012). https://doi.org/10.1007/s13131-012-0248-2

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  • DOI: https://doi.org/10.1007/s13131-012-0248-2

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