Circulation of water masses in the Baltic Proper revealed through iodine isotopes

P. Yi, X.G. Chen, A. Aldahan, G. Possnert, Xiaolin Hou, Z.B. Yu, D.H. Xiong, B. Wang

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    Abstract

    Tracer technology has been used to understand water circulation in marine systems where the tracer dose is commonly injected into the marine waters through controlled experiments, accidental releases or waste discharges. Anthropogenic discharges of 129I have been used to trace water circulation in the Arctic and North Atlantic Ocean. Here, 129I, together with 127I, is utilized as a tracer of water pathways and circulation in the Baltic Sea through collection of seawater depth profiles. The results indicate the presence of 129I signatures which are distinct for each water mass and provide evidence for: (1) inflow water masses through the Drogden Sill that may reach as far as the SW of the Arkona Sea, (2) a portion of North Atlantic water in the bottom of Arkona basin, (3) cyclonic upwelling which breaks through the halocline in a pattern similar to the Baltic haline conveyor belt and (4) more influx of fresher water from the Gulf of Finland and Bothnian Sea in August relative to April. These findings provide advances in labeling and understanding water pathways in the Baltic Sea.
    Original languageEnglish
    JournalApplied Geochemistry
    Volume36
    Pages (from-to)118-124
    ISSN0883-2927
    DOIs
    Publication statusPublished - 2013

    Cite this

    Yi, P., Chen, X. G., Aldahan, A., Possnert, G., Hou, X., Yu, Z. B., Xiong, D. H., & Wang, B. (2013). Circulation of water masses in the Baltic Proper revealed through iodine isotopes. Applied Geochemistry, 36, 118-124. https://doi.org/10.1016/j.apgeochem.2013.05.014