[KSCI] Korea Science Citation Index Service

Downward particle flux in the eastern Bransfield Strait, Antarctica

Kim, Dongseon (Polar Research Laboratory, Korea Ocean Research & Development Institute)
Kim, Dong-Yup (Polar Research Laboratory, Korea Ocean Research & Development Institute)
Jeonghee Shim (Polar Research Laboratory, Korea Ocean Research & Development Institute)
Kang, Young-Chul (Polar Research Laboratory, Korea Ocean Research & Development Institute)
Kim, Taerim (School of Ocean Applied Science & Technology, Kunsan National Univeristy)

Publication Information

Journal of the korean society of oceanography / v.38, no.1, 2003 , pp. 1-10 More about this Journal

Abstract

A time-series sediment trap was deployed at a depth of 1034 m in the eastern Bransfield Strait from December 25, 1998 to December 24, 1999. Particle fluxes showed large seasonal variation; about 99% of the annual total mass flux (49 g m/sup -2/) was collected during the austral summer and fall (January-March). Settling particles consisted primarily of biogenic silica, organic carbon, calcium carbonate, and lithogenic material. Biogenic silica and lithogenic material predominated settling particles, comprising 36% and 30% of the total mass flux, respectively, followed by organic carbon, 11% and calcium carbonate, merely 0.6%. The annual organic carbon flux was 5.4 g C m/sup -2/ at 1000 m in the eastern Bransfield Strait, which is greater than the central Strait flux. The relatively lower flux of organic carbon in the central Bransfield Strait may be caused by a stronger surface current in this region. Organic carbon flux estimates in the eastern Bransfield Strait are the highest in the Southern Ocean, perhaps because of the fast sinking of fecal pellets, which leads to less decomposition of organic material in the water column. Approximately 5.8% of the organic carbon produced on the surface in the eastern Bransfield Strait is exported down to 1000 m; this percentage exceeds the maximum EF/sub 1000/ values observed in the Atlantic and Southern Oceans. The eastern Bransfield Strait appears to be the most important site of organic carbon export to the deep sea in the Southern Ocean.

Keywords

Antarctica; Bransfield strait; Sediment trap; Particle flux;

Citations & Related Records

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