Conclusions

In conclusion there is now an increasing amount of information on the formation and transport behavior of organic rich aggregates but lack of knowledge on the compositional changes over long time periods. The organic rich aggregates within the resuspension loop can still show a greenish color after several weeks or months but seem highly refractory and are thus exposed to low bacterial decomposition. Further studies are needed to investigate this effect of possible carbon protection within the BBL and the implication for long-term carbon storage in the ocean.

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