Temporal Variability of Currents in the Ross Sea (Antarctica)

  • P. Picco
  • L. Amici
  • R. Meloni
  • L. Langone
  • M. Ravaioli
Conference paper


Some results from the analysis of about one year long time series of currents, tem­perature and salinity data collected in the central-western part of the Ross Sea during 1995 are here presented. Temporal evolution and seasonal variability of currents at intermediate and deep layers in different locations are described. The role of surface seasonal processes and of the advection of different water masses on temperature and salinity variations is investigated. Spectral analysis, focusing on low frequency oscillations, evidences that kinetic energy is mainly concentrat­ed on mesoscale phenomena time scale at which barotropic movements prevail. At higher frequencies, the tidal component strongly dominates, while the inertial oscillation, whose frequency is the same band, is less important. The ice forma­tion and melting processes affect also the intermediate level as evidenced in tem­perature and salinity time series, but do not seem to modify significantly the cir­culation in this layer. Apart from a weakeness in kinetic energy observed in most of the locations from late April to early June, the general circulation does not pre­sent an important seasonal variability, suggesting that the open ocean Antarctic Circumpolar Current acts as a prevailing forcing with respect to the thermoaline forcings.


Empirical Orthogonal Function Antarctic Continental Shelf Salinity Time Series Polynya Area Barotropic Movement 
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  1. 1.
    PNRA (1995) Rapporto sulla Campagna Antartica Estate Australe 1994/95 X Spedizione. Progetto Antartide ANT 95 /02Google Scholar
  2. 2.
    PNRA (1996) Rapporto sulla Campagna Antartica Estate Australe 1995/96 XI Spedizione. Progetto Antartide ANT 96 /07Google Scholar
  3. Kurtz DD, Bromwich DH (1985) A recurring atmospherically forced polynya in Terra Nova Bay. In: Budillon et al. Oceanology of the Antarctic Continental Shelf. Antarct Res Ser 43:177-202, AGU, Washington, DCGoogle Scholar
  4. 4.
    Manzella GMR, Meloni R, and Picco P (1998) Current, temperature and salinity observations in the Terra Nova Bay polynya area (This Volume)Google Scholar
  5. 5.
    Keys JR, Jacobs SS, and Barnett D (1990) The calving and drift of iceberg B-9 in the Ross Sea, Antarctica. Antarctic Sci 2 (3): 243 - 257CrossRefGoogle Scholar
  6. 6.
    Jacobs SS, Amos AF, Bruchhausen PM (1970) Ross Sea oceanography and Antarctic bottom water formation. Deep Sea Res 17: 935 - 962Google Scholar
  7. 7.
    Jacobs SS, Fairbanks RG and Horibe Y (1985) Origin and evolution of water masses near the Antarctic continental margin: evidence from H2 180/ H216O ratio in sea water. In: Oceanology of the Antarctic Continental Shelf. Antarct Res Ser 43:87-107, AGU, Washington, DCGoogle Scholar
  8. 8.
    Godin G (1972) The analysis of tides. Liverpool University Press, LiverpoolGoogle Scholar
  9. 9.
    Gonella J (1972) A rotary-component method for analysing meteorological and oceanographic vector time series. Deep Sea Res 19: 833 - 846Google Scholar
  10. 10.
    Lutjeharms JRE, Stavropoulos CC, and Koltermann KP (1985) Tidal measurements along the Antarctic coastline. In: Oceanology of the Antartic Continental Shelf. Antarct Res Ser 43:273-290, AGU, Washington, DCGoogle Scholar
  11. 11.
    Stocchino C, Manzella GMR (1991) Analisi delle correnti marine di Baia Terra Nova (Mare di Ross, Antartide). Consiglio Nazionale delle Ricerche, GenovaGoogle Scholar
  12. 12.
    Comiso JC, Maynard NG, Smith WO Jr, Sullivan CW (1990) Satellite ocean colour studies of Antartic ice edges in summer and autumn. J Geophys Res 95 (C6): 9481 - 9496CrossRefGoogle Scholar
  13. 13.
    Jacobs SS, Comiso JC (1989) Sea Ice and oceanic processes on the Ross Sea continental shelf. J Geophys Res 94 (C12): 18195 - 19211CrossRefGoogle Scholar
  14. 14.
    Pillsbury RD, and Jacobs SS (1985) Preliminary observation from long-term current meter moorings near the Ross Ice Shelf, Antartica. In: Oceanology of the Antartic Continental Shelf Antarct. Res Ser 43:87-107, AGU, Washington, DCGoogle Scholar
  15. 15.
    Jaeger JM, Nittrouer CA, De Master DJ, Klechner C and Dunbar RB (1996) Lateral transport of settling particles in the Ross Sea and implication for the fate of biogenic material. J Geophys Res 101 (C8): 18479 - 18488CrossRefGoogle Scholar
  16. 16.
    Bergamasco A, Carniel S, Caldesi Valeri L (1998) Reconstructing the general circulation of the Ross Sea using a robust diagnostic model (This Volume )Google Scholar

Copyright information

© Springer-Verlag Italia, Milano 1999

Authors and Affiliations

  • P. Picco
    • 1
  • L. Amici
    • 2
  • R. Meloni
    • 2
  • L. Langone
    • 3
  • M. Ravaioli
    • 3
  1. 1.ENEA CRAMLa SpeziaItaly
  2. 2.CNR Istituto di Oceanografia FisicaLa SpeziaItaly
  3. 3.CNR Istituto di Geologia MarinaBolognaItaly

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