Downward fluxes of biogenic material in Bransfield Strait, Antarctica SCIE SCOPUS

Cited 19 time in WEB OF SCIENCE Cited 0 time in Scopus
Title
Downward fluxes of biogenic material in Bransfield Strait, Antarctica
Author(s)
Kim, D; Kim, DY; Kim, YJ; Kang, YC; Shim, J
KIOST Author(s)
Kim, Dongseon(김동선)Kim, Do Young(김도영)Kim, Young June(김영준)
Publication Year
2004-09
Abstract
Time-series sediment traps were deployed to investigate the temporal evolution of particle fluxes in eastern and central Bransfield Strait, from December 1999-December 2000. Particle fluxes showed large seasonal variation at both trap sites. In eastern Bransfield Strait, summer mass fluxes were two orders of magnitude higher than winter mass fluxes, while in central Bransfield Strait, almost 99% of the annual mass flux (33 g m(-2)) was collected in a 40-day period from December-January. Export flux also exhibited a high regional variability. This regional variability is probably due to central Bransfield Strait's strong surface current, which carries most settling particles produced in the surface waters away from the mooring site during the low summer flux period. The relatively low biogenic silica to organic carbon ratios (a range of 0.29-1.4) and high lithogenic fluxes (41% of total mass flux) indicate that the growth of phytoplankton is not limited by the micronutrient iron in eastern Bransfield Strait. The annual flux of organic carbon in eastern Bransfield Strait was 6.8 g C m(-2), which is three times higher than the flux measured in central Bransfield Strait (2.2 g C m (-2)). Organic carbon flux in eastern Bransfield Strait is relatively high for the Southern Ocean, possibly due to fast-sinking faecal pellets that lead to less decomposition of organic material in the water column. Calculations suggest that approximately 7.2% of the organic carbon produced at the surface in eastern Bransfield Strait is exported to a depth of 678 m. This exceeds the maximum calculated export of primary production to a depth of 1000 m in the Atlantic and Southern oceans.
ISSN
0954-1020
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/5223
DOI
10.1017/S0954102004002032
Bibliographic Citation
ANTARCTIC SCIENCE, v.16, no.3, pp.227 - 237, 2004
Publisher
CAMBRIDGE UNIV PRESS
Keywords
biogenic silica; BSi/OC ratio; organic carbon; particle flux; time-series sediment trap
Type
Article
Language
English
Document Type
Article
Publisher
CAMBRIDGE UNIV PRESS
Related Researcher
Research Interests

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

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