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Particle Fluxes at the Edge of the Ross Ice Shelf: the Role of Physical Forcing

  • A. Accornero
  • A. Bergamasco
  • A. Monaco
  • S. Tucci

Abstract

In this paper we present the seasonal variation of downward particle flux, as expressed by total mass flux and its main biogenic components (organic matter, biogenic silica and carbonate) in a site located at the edge of the Ross Ice Shelf. The focus of this study is on data from mooring site named F, located at 77°59’.998 S, 177°01’.623 W in the framework of the C.L.I.M.A. Project (Climatic Long-term Interaction for the Mass Balance in Antarctica) during the deployment period January 28, 1995 - January 21, 1996. Total mass flux shows a clear seasonal trend, with the austral summer months (December-March) accounting for about 93% of the total annual flux and the predominance of the biogenic (55-99% of the total) versus the lithogenic fraction through the whole considered period. In order to understand the role of physical forcing on sedimentation processes (as recorded by the moored trap) we construct a simple Montecarlo model of particle downfall that takes into account both the intrinsic sinking velocity of particles and the actual vertical displacement of the water layer in wich they are contained. On the basis of the potential density anomaly evolution, vertical displacement of the isopycnal surfaces ranging from 27.69 to 27.77 are computed and updated every day. This numerical experiment puts in evidence the great importance of the water column stability and density variability as forcing factors for sedimentation processes. Dynamical constraints are observed to play a crucial role, even in the presence of high production rates.

Keywords

Sediment Trap Particle Flux Biogenic Silica Mooring Line Isopycnal Surface 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. 1.
    Fowler SW, Knauer G (1986) Role of large particles in the transport of elements and organic corn-pounds through the oceanic water column. Prog Oceanogr 16: 147–194CrossRefGoogle Scholar
  2. 2.
    DeMaster DJ, Dunbar RB, Gordon LI, Leventer AR, Morrison JM, Nelson DM, Nittrouer CA, Smith WO Jr (1992) Cycling and accumulation of biogenic silica and organic matter in high latitude environments: the Ross Sea. Oceanography 5 (3): 146–153Google Scholar
  3. 3.
    Comiso JC, McClain CR, Sullivan CW, Ryan JP, Leonard CL (1993) Coastal zone color scanner pigment concentrations in the Southern Ocean and relationship with geophysical surface features. J Geophy Res 98: 2419–2451CrossRefGoogle Scholar
  4. 4.
    Nelson DM, DeMaster DJ, Dunbar RB, Smith WO Jr (1996) Cycling of organic carbon and biogenic silica in the Southern Ocean: estimates of water-column and sedimentary fluxes on the Ross Sea continental shelf. J Geophys Res 101 (C8): 18519–18532CrossRefGoogle Scholar
  5. 5.
    Smith WO Jr, Nelson DM, DiTullio GR, Leventer A (1996) Temporal and spatial patterns in the Ross Sea: phytoplankton biomass, elemental composition, productivity and growth rates. J Geophys Res 101 (C8): 18455–18465CrossRefGoogle Scholar
  6. 6.
    Goosse H, Hecq J-H (1994) Modelling the ice-ocean-plankton interactions in the Southern Ocean. J Mar Syst 5: 471–484CrossRefGoogle Scholar
  7. 7.
    Smith WO Jr, Nelson DM (1985) Phytoplankton bloom produced by a receding ice edge in the Ross Sea: spatial coherence with the density field. Science 227: 163–166CrossRefGoogle Scholar
  8. 8.
    Smith WO Jr, Nelson DM (1986) Importance of ice edge phytoplankton production in the Southern Ocean. Bioscience 36 (4): 251–257CrossRefGoogle Scholar
  9. 9.
    Nelson DM, Smith WO Jr (1986) Phytoplankton bloom dynamics of the western Ross Sea ice-edge–II. Mesoscale cycling of nitrogen and silicon. Deep Sea Res 33 (10): 1389–1412CrossRefGoogle Scholar
  10. 10.
    Wilson DL, Smith WO Jr, Nelson DM (1986) Phytoplankton bloom dynamics of the western Ross Sea ice edge. I. Primary productivity and species-specific production. Deep Sea Res 33 (10): 1375–1387CrossRefGoogle Scholar
  11. 11.
    Sullivan CW, McClain CR, Comiso JC, Smith WO (1988) Phytoplankton standing crops within an Antarctic ice edge assessed by satellite remote sensing. J Geophys Res 93: 12487–12498CrossRefGoogle Scholar
  12. 12.
    Tucci S, Budillon G, Capello M, Ferrari M (1996) The suspended matter in water masses near the Ross Ice Shelf. Proceedings International Workshop “Ross Sea Ecology”, Taormina, 14–16 May 1996, pp 173–177Google Scholar
  13. 13.
    Carmack EC (1990) Large-scale physical oceanography of Polar Oceans. In: WO Smith Jr (ed) Polar Oceanography. Part A: Physical Science. Academic Press Inc, San Diego, California, pp 171222Google Scholar
  14. 14.
    Pillsbury RD, Jacobs SS (1985) Preliminary observations from long-term current meter moorings near the Ross Ice Shelf, Antarctica. In: Jacobs SS (ed) Oceanology of the Antarctic Continental Shelf. Antarc Res Ser 43: 87–107. AGU, Washington DCCrossRefGoogle Scholar
  15. 15.
    Roemmich D (1983) Optimal estimation of hydrographic station data and derived field. J Phys Oceanogr 13: 1543–1549Google Scholar
  16. 16.
    Roemmich D (1983) Optimal estimation of hydrographic station data and derived field. J Phys Oceanogr 13: 1543–1549Google Scholar
  17. 17.
    Accornero A, Marino D, Razouls S, Monaco A (1998) Seasonality and composition of particulate fluxes in the Southern Ross Sea (Antarctica). Paper presented at 30th International Liege Colloquium on Ocean Hydrodynamics “Hydrodynamical and Ecosystem Processes in Ice Covered Seas of the Southern and Northern Hemispheres”, Liege, May 4–8,1998Google Scholar
  18. 18.
    Heussner S, Ratti C, Carbonne J (1990) The PPS 3 time-series sediment trap and the trap sample processing techniques used during the ECOMARGE experiment. Cont Shelf Res 10 (9–11): 943–958CrossRefGoogle Scholar
  19. 19.
    Gordon DC (1970) Some studies of the distribution and composition of particulate organic carbon in the North Atlantic Ocean. Deep Sea Res 17: 233–244Google Scholar
  20. 20.
    Monaco A, Courp T, Heussner S, Carbonne J, Fowler SW, Deniaux B (1990) Seasonality and corn-position of particulate fluxes during ECOMARGE–I, western Gulf of Lions. Cont Shelf Res 10 (911): 959–987CrossRefGoogle Scholar
  21. 21.
    DeMaster DJ (1991) Measuring biogenic silica in marine sediments and suspended matter. In: Marine particles: analysis and characterization. Geophys Mono 63, AGU, pp 363–367CrossRefGoogle Scholar
  22. 22.
    Gardner WD (1980) Field assessment of sediment traps. J Mar Res 38: 41–52Google Scholar
  23. 23.
    Baker ET, Milburn HB, Tennant DA (1988) Field assessment of sediment trap efficiency under varying flow conditions. J Mar Res 46: 573–592CrossRefGoogle Scholar
  24. 24.
    Dunbar RB, Leventer AR, Stockton WL (1989) Biogenic sedimentation in McMurdo Sound, Antarctica. Mar Geol 85 (2/4): 155–179CrossRefGoogle Scholar
  25. 25.
    Wefer G, Fischer G, Futterer D, Gersonde R (1988) Seasonal particle flux in the Bransfield Strait, Antarctica. Deep Sea Res 35 (6): 891–898CrossRefGoogle Scholar
  26. 26.
    Fischer G, Futterer D, Gersonde R, Honjo S, Ostermann D, Wefer G (1988) Seasonal variability of particle flux in the Weddel; Sea and its relation to ice cover. Nature 335: 426–428Google Scholar
  27. 27.
    Matsuda O, Ishikawa S, Kawakuchi K (1987) Seasonal variation of downward flux of particulate organic matter under the Antarctic fast ice. Proc NIPR Symp on Polar Biol 1: 23–34Google Scholar
  28. 28.
    Fujita N, Nishizawa S (1982) Vertical flux of particulate matter in the Antarctic Ocean in summer 1981. Trans Tokyo Univ Fish 5: 43–52Google Scholar
  29. 29.
    Dunbar RB (1984) Sediment trap experiments on the Antarctic continental margin. Antarct J United States 19: 70–71Google Scholar
  30. 30.
    Biggs DC, Berkowitz SP, Altabet MA, Bidigare RR, DeMaster DJ, Macko SA, Ondrusek ME, Noh II (1989) Cooperative study of upper ocean particle flux. Proc Ocean Drilling Program Part A: Initial Rep 119: 109–119Google Scholar
  31. 31.
    von Bodungen B, Smetacek VS, Tilzer MM, Zeitzschel B (1986) Primary production and sedimentation during spring in the Antarctic Peninsula region. Deep Sea Res 33 (2): 177–194CrossRefGoogle Scholar
  32. 32.
    Noriki S, Tsunogai S (1986) Particulate fluxes and major components of settling particles from sediment trap experiments in the Pacific Ocean. Deep Sea Res 33: 903–912CrossRefGoogle Scholar
  33. 33.
    Karl DM, Tilbrook DB, Tien G (1991) Seasonal coupling of organic matter production and particle flux in the western Bransfield Strait, Antarctica. Deep Sea Res 38 (8/9): 1097–1126Google Scholar
  34. 34.
    Dunbar RB, Mucciarone DA, Leventer A (1991) Sediment trap experiments in the central and western Ross Sea, January and February 1990. Antarct J United States 26 (5): 115–117Google Scholar
  35. 35.
    Honjo S, Manganini SJ, Poppe LJ (1982) Sedimentation of lithogenic particles in the deep ocean. Mar Geol 50: 199–220CrossRefGoogle Scholar
  36. 36.
    Alldredge AL, Youngbluth MJ (1985) The significance of macroscopic aggregates (marine snow) as sites for heterotrophic bacterial production in the mesopelagic zone of the subtropical Atlantic. Deep Sea Res 32: 1445–1456CrossRefGoogle Scholar
  37. 37.
    Asper VL (1987) Measuring fluxes and sinking speed of marine snow aggregates. Deep Sea Res 34: 1–17CrossRefGoogle Scholar
  38. 38.
    Alldredge AL, Silver MW (1988) Characteristics, dynamics and significance of marine snow. Prog Oceanogr 20: 41–82CrossRefGoogle Scholar
  39. 39.
    McCave IN (1975) Vertical flux of particles in the ocean. Deep Sea Res 22: 491–502Google Scholar
  40. 40.
    Bishop JKB, Edmond JM, Ketten DR, Bacon MP, Silker WB (1977) The chemistry, biology and vertical flux of particulate matter from the upper 400 m of the equatorial Atlantic Ocean. Deep Sea Res 25: 511–548Google Scholar
  41. 41.
    Chesselet R (1980) Modes of settling and organic input to the sediment seawater interface. A review. In: Biogéochimie de la matière organique à l’interface eau-sédiment marin. Colloque International CNRS 293: 27–33Google Scholar
  42. 42.
    Billett DSM, Lampitt RS, Rice AL, Mantoura RCF (1983) Seasonal sedimentation of phytoplankton to the deep-sea benthos. Nature 302: 520–522CrossRefGoogle Scholar
  43. 43.
    Lampitt RS (1985) Evidence for the seasonal deposition of detritus to the deep-sea floor and its subsequent resuspension. Deep Sea Res 32: 885–897CrossRefGoogle Scholar
  44. 44.
    Biscaye PE, Anderson RF, Deck BL (1988) Fluxes of particles and constituents to the eastern United States continental slope and rise: SEEP I. Cont Shelf Res 8: 855–904Google Scholar
  45. 45.
    Alldredge AL, Gotschalk CC (1989) Direct observations of the mass flocculation of diatom blooms: characteristics, settling velocities and formation of diatom aggregates. Deep Sea Res 36: 159–171CrossRefGoogle Scholar
  46. 46.
    Dunbar RB, Anderson JB, Domack EW (1985) Oceanographic influences on sedimentation along the Antarctic continental shelf. In: Jacobs SS (ed) Oceanology of the Antarctic Continental Shelf. Antarct Res Ser 43: 291–312, AGU, Washington DCCrossRefGoogle Scholar
  47. 47.
    Jaeger JM, Nittrouer CA, DeMaster DJ, Kelchner C, Dunbar RB (1996) Lateral transport of settling particles in the Ross Sea and implications for the fate of biogenic material. J Geophys Res 101 (C8): 18479–18488CrossRefGoogle Scholar
  48. 48.
    Takahashi K (1986) Seasonal fluxes of pelagic diatoms in the subarctic Pacific, 1982–1983. Deep Sea Res 33: 1225–1251CrossRefGoogle Scholar
  49. 49.
    El-Sayed SZ (1984) Productivity of the Antarctic waters–reappraisal. In: Holm-Hansen O, Bolis L, Gilles R (eds) Marine phytoplankton and productivity. Springer-Verlag, New York, pp 19–34Google Scholar
  50. 50.
    Sakshaug E, Holm-Hansen 0 (1984) Factors governing pelagic production in polar oceans. In: Holm-Hansen O, Bolis L, Gilles R (eds) Marine Phytoplankton and Productivity. Springer-Verlag, New York, pp 1–18Google Scholar
  51. 51.
    Hempel G (1985) Antarctic marine food webs. In: Siegfried WG, Condy PR, Laws RM (eds) Antarctic nutrient cycles and food webs. Springer-Verlag, New York, pp 266–270Google Scholar
  52. 52.
    Palmisano AC, Kottmeier ST, Moe RL, Sullivan CW (1985) Sea ice microbial communities. IV The effect of light perturbation on microalgae at the ice seawater interface in McMurdo Sound, Antarctica. Mar Ecol Prog Ser 21: 37–45Google Scholar
  53. 53.
    Palmisano AC, SooHoo JB, Moe RL, Sullivan CW (1987) Sea ice microbial communities. VII Changes in under-ice spectral irradiance during the development of Antarctic sea ice microalgal communities. Mar Ecol Prog Ser 35: 165–173Google Scholar
  54. 54.
    Holm-Hansen O, Mitchell BG, Hewes CD, Karl DM (1989) Phytoplankton blooms in the vicinity of Palmer Station, Antarctica. Polar Biol 10: 49–57Google Scholar
  55. 55.
    Mitchell BG, Brady EA, Holm-Hansen O, McClain C, Bishop J (1991) Light limitation of phytoplankton biomass and macronutrient utilization in the Southern Ocean. Limnol Oceanogr 36: 1662–1667CrossRefGoogle Scholar
  56. 56.
    Nelson DM, Smith WO Jr (1991) Sverdrup revisited: critical depths, maximum chlorophyll levels, and the control of Southern Ocean productivity by the irradiance-mixing regime. Limnol Oceanog 36 (8): 1650–1661CrossRefGoogle Scholar

Copyright information

© Springer-Verlag Italia, Milano 1999

Authors and Affiliations

  • A. Accornero
    • 1
  • A. Bergamasco
    • 2
  • A. Monaco
    • 3
  • S. Tucci
    • 4
  1. 1.Istituto di Meteorologia e OceanografiaIstituto Universitario NavaleNapoliItaly
  2. 2.lstituto per lo Studio della Dinamica delle Grandi MasseConsiglio Nazionale delle RicercheVeneziaItaly
  3. 3.Centre de Formation et de Recherche sur l’Environnement MarinUniversité de PerpignanPerpignan cedexFrance
  4. 4.Dipartimento di Scienze della TerraUniversità di GenovaGenovaItaly

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