Distinct diurnal cycle

Timor Sea between Australia and Indonesia but results of a Lagrangian study in which the same parcel of water was tracked and samples taken over one day revealed a distinct diurnal cycle in < 0.4 pm ferrozine-reactive iron concentrations (Fig. 19) [153]. While a large diel variation in the concentration of ferrozine-reactive iron is apparent, this represented only a small fraction (< 1%) of the total iron pool in these waters. 

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