Ocean and Polar Research

Korea Institute of Ocean Science & Technology (한국해양과학기술원)
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Behaviors of Metals in the Settling Particles in the Bransfield Strait, Antarctica

남극 브랜스필드 해협에서 침강입자의 금속원소 특성

  • 김동선 (한국해양연구원 극지연구본부) ;
  • 김동엽 (한국해양연구원 극지연구본부) ;
  • 김영준 (한국해양연구원 기기운영팀) ;
  • 강영철 (한국해양연구원 극지연구본부) ;
  • 심정희 (한국해양연구원 극지연구본부)
  • Published : 2003.03.31
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Abstract

Sediment trap samples were collected to find out characteristic behaviors of metals in the settling particles by using time-series sediment traps at 678m and 1678m water depths in the Bransfield Strait from December 27th, 1999 to December 26th, 2000. Total mass fluxes at the intermediate water depth (678m water depth) were high in the austral summer and low in the austral winter, whereas at the deep water depth (1678m water depth) they showed high values in both the summer and winter. Total mass fluxes were generally higher in the deep water depth than in the intermediate water depth, which indicates that a substantial amount of sediments are laterally transported by strong currents into the deep basin from the shallow water depths. Aluminium contents also showed large seasonal variations with high values in the winter and low values in the summer. On the contrary, organic carbon contents were high in the summer and low in the winter. Al contents were negatively correlated with organic carbon contents, which may be ascribed that detrital particles are diluted by organic matter produced by phytoplankton in the surface waters. Metals measured in this study exhibited three characteristic behaviors; 1) a positive correlation with Al-Ti, Fe, Mn, V, Co, and Ba, 2) a negative correlation with Al-Cd and Zn, 3) no relationship with Al-Sr, Cu, Cr, Ni. Terrestrial materials may act as a major source fer metals that are positively correlated with Al, and organic matter may be a major source for metals that are negatively correlated with Al. Enrichment factor (EF) of Fe, Mn, Ba, Vi Co, Sr, Cr, and Ni ranged from 0.5 to 1.5, whereas EF of Zn, Cu, and Cd showed much higher values than 1.

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References

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