Seasonal variability of deep ocean particle fluxes and particle composition in the north open sea of Prydz Bay |
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| Authors: | Chuanyu HU Bin XUE Xiaoya LIU Jianming PAN |
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| Institution: | (1) Laboratory of Marine Ecosystem and Biogeochemistry, State Oceanic Administration, Hangzhou, 310012, China;(2) China University of Geosciences, Wuhan, 430074, China |
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| Abstract: | Time-series Mark VII sediment trap was deployed at 72°58.55′E, 62°28.63°S (north of the Prydz Bay, Antarctica) during the
cruise of CHINARE-15 in cooperation with University of Marine of America. Seasonal variability of deep ocean particle fluxes
and biogenic components were investigated in order to reveal the fluxes and biogeochemistry of sinking particles in the deep
ocean. The results show that the total mass flux of sinking particles at a water depth of 1000 m ranges from 13.00 to 334.59
mg⋅d−1⋅m−2). A marked seasonal variability exists in the fluxes of all particle components reflecting the seasonal changes in upper
water productivity. Biogenic material was a significant component and biogenic silica represented more than 80% of the biogenic
matter, reflecting a diatom dominated system, but a lithogenic fraction is always present. The fact that the POC dominated
over particulate inorganic carbon (as CaCO3) and Cinorg/Corg was always greater than 1, indicate a net removal of CO2 from surface water by biological activity.
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Translated from Acta Oceanologica Sinica, 2006, 5: 49–55 译自:海洋 学报] |
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| Keywords: | particle flux particle composition Prydz Bay Antarctica |
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