Sea flux of trace metals in Saanich Inlet |
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| Authors: | Zhan Binqiu C S Wong K W Johnson |
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| Institution: | (1) Institute of Oceanology, Academia Sinica, Qingdao;(2) Institute of Ocean Sciences, Canada |
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| Abstract: | The sea fluxes of trace metals, POC, and settled material were studied in anoxic seawater, Saanich Inlet, B. C., Canada with
sediment traps. This paper discusses the change of mass fluxes of sediment, trace metals and POC for various seasons and depths.
The annual mean of settled material is 1.56 g.m−2.a−1, 84.6 mg. m−2.a−1 for POC, 60.0 mg. m−2.a−1 for Cu, 16.5 mg.m−2.a−1 for Pb, 189 mg.m−2.a−1 for Zn, 2.20 mg.m−2.a−1 for Cd, 699 mg.m−2.a−1 for Fe, 38.8 mg.m−2.a−1 for Co, and 84.6 mg.m−2.a−1 for Ni. The relations between the average fluxes of trace metals and POC, the fluxes of trace metals and settled matter,
and the sea fluxes of trace metals and Fe are in linear progression. The resident times of elements as calculated from sea
flux, are 1.1 a. for Cu, 0.014 a. for Pb, 0.50 a. for Zn, 3.8 a. for Cd, 0.16 a. for Fe, 0.39 a. for Co, and 1.14 a. for Ni.
The order of resident times is as follows: Pb−Fe−Co−Zn−Cu−Ni−Cd. The metal resident times in Saanich Inlet are shorter than
the values estimated for the open ocean. It illustrates that the biochemical processes in shallow Saanich Inlet are faster
than those in the open ocean, and that debries of plankton and fecal pellets of zooplankton play an important role in vertical
transport of organic carbons.
Contribution No. 1650 from the Institute of Oceanology, Academia Sinica. |
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