Distribution of dissolved molybdenum,uranium and vanadium in baltic sea waters |
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| Authors: | Andreas Prange Klaus Kremling |
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| Institution: | Institut für Physik, GKSS Forschungszentrum Geesthacht GmbH, Postfach 1160, D-2054 Geesthacht F.R.G.;Institut für Meereskunde an der Universität Kiel, Düsternbrooker Weg 20, D-2300 Kiel F.R.G. |
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| Abstract: | This study presents dissolved molybdenum, uranium and vanadium profiles from eight stations in the main Baltic subregions. The elements were analysed by a new analytical procedure based on total-reflection X-ray fluorescence (TXRF). Mo and U reveal a strong, positive correlation with salinity (with r = 0.95 and 0.93, respectively). The estimated end-member concentrations (for S = 35 × 10?3) are consistent with North Atlantic Ocean water values, indicating conservative mixing with Baltic river waters as the dominating process. In contrast, dissolved V shows relatively low levels, with mean surface and deep layer values of 2.7 and 1.7 nmol kg?1, respectively. Compared with recently investigated Atlantic Ocean waters (normalized to S = 35 × 10?3), Baltic waters are deplated in dissolved V by more than 60%. The removal is attributed to scavenging processes by terrigenous and/or biogenic material during the course of mixing. However, the data did not indicate that precipitation or other removal processes were significant in the anaerobic waters. |
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