Format:
Online-Ressource
ISSN:
1726-4189
Content:
Abstract Fe/Al ratio of suspended and sinking particles revealed that biogenic particles, and in particular diatoms, were key in accumulating and exporting Al relative to Fe. By combining these observations with published Al/Si ratios of diatoms, we show that adsorption onto biogenic particles, rather than active uptake, represents the main sink for dAl in Mediterranean waters. In contrast, systematic dissolved Fe (dFe) accumulation occurred in subsurface waters (∼ 〈 - 1) cause us to question the residence time for this dust-derived subsurface reservoir and hence its role as a supply mechanism for the surface ocean, stressing the need for further studies. Finally, these contrasting responses indicate that dAl is a poor tracer of dFe input in the Mediterranean Sea.
In:
volume:18
In:
number:24
In:
year:2021
In:
pages:6435-6453
In:
extent:19
In:
Biogeosciences, Katlenburg-Lindau [u.a.] : Copernicus, 2004-, 18, Heft 24 (2021), 6435-6453 (gesamt 19), 1726-4189
Language:
English
DOI:
10.5194/bg-18-6435-2021
URN:
urn:nbn:de:101:1-2021122304403772128111
URL:
https://doi.org/10.5194/bg-18-6435-2021
URL:
https://nbn-resolving.org/urn:nbn:de:101:1-2021122304403772128111
URL:
https://d-nb.info/1248311345/34
URL:
https://bg.copernicus.org/articles/18/6435/2021/bg-18-6435-2021.pdf
URL:
https://bg.copernicus.org/articles/18/6435/2021/
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