Removal fluxes of Mn and Fe from the nearshore waters along the west coast of Taiwan |
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| Authors: | Wei Ching-Ling Jiann Kuo-Tung Wen Liang-Saw Tsai Jing-Ru Sheu David D |
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| Institution: | a Institute of Oceanography, National Taiwan University, Taipei, Taiwan;b Institute of Marine Geology and Chemistry, National Sun Yat-sen University, Kaohsiung, Taiwan |
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| Abstract: | Dissolved and particulate Mn and Fe in the nearshore waters were determined at 27 stations along the west coast of Taiwan during 19-23 November 2004. The latitudinal distributions of Mn and Fe were very similar; however, the concentration in the dissolved phase was lower, whereas that in the particulate phase was higher in the northern regime. The higher percentage of Fe than Mn that was associated with particles resulted in a two-order of magnitude higher particle-water partition coefficient for Fe, Kd(Fe), than that for Mn, Kd(Mn). The removal fluxes of Mn and Fe could be estimated by multiplying the particulate 234Th removal flux with the Mn/234Th and Fe/234Th ratios in suspended particles, which ranged from 0.1 to 3.8 mmol m?2 d?1 for Mn, and from 3.4 to 194.5 mmol m?2 d?1 for Fe. Residence times ranged from 1 to 20 days for Mn and Fe were estimated in the nearshore. |
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| Keywords: | Mn Fe Scavenging Taiwan Nearshore waters 234Th |
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