Downward particle flux in the eastern Bransfield Strait, Antarctica KCI OTHER

Title
Downward particle flux in the eastern Bransfield Strait, Antarctica
Alternative Title
Downward particle flux in the eastern Bransfield Strait, Antarctica
Author(s)
김동선; 김동엽; 심정희; 강영철; 김태림
KIOST Author(s)
Kim, Dongseon(김동선)Kim, Do Young(김도영)
Publication Year
2003-03
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.
ISSN
1226-2978
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/5540
Bibliographic Citation
바다, v.38, no.1, pp.1 - 10, 2003
Publisher
한국해양학회
Keywords
Antarctica; Bransfield strait; Sediment trap; Particle flux
Type
Article
Language
English
Publisher
한국해양학회
Related Researcher
Research Interests

Biogeochemistry,Carbon cycle,Ocean acidification,생지화학,탄소순환,해양산성화

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