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Please use this identifier to cite or link to this item:
http://hdl.handle.net/1956/418
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| Title: | Coupled Al-Si geochemistry in an ocean general circulation model: A tool for the validation of oceanic dust deposition fields? |
| Authors: | Gehlen, M.
Heinze, C.
Maier-Reimer, E.
Measures, C. I. |
| Issue Date: | 19-Mar-2003 |
| Publisher: | American Geophysical Union |
| Citation: | Gehlen, M., C. Heinze, E. Maier-Reimer, and C. I. Measures, Coupled Al-Si geochemistry in an ocean general circulation model: A tool for the validation of oceanic dust deposition fields?, Global Biogeochem. Cycles, 17(1), 1028, doi:10.1029/2001GB001549, 2003. |
| Series/Report no.: | Global biogeochemical cycles;17(1) |
| Abstract: | We introduced the marine cycle of Al into a geochemical ocean general circulation
model in order to assess the potential of modeled surface ocean dissolved Al as a tracer
for dust input to the world ocean. The geochemical cycles of Si and Al have been
coupled through the dynamics of diatoms. Aluminum is added to the ocean by
deposition of continental aerosols followed by partial dissolution of the aluminosilicate
fraction. Dissolved Al interacts with suspended siliceous particles according to a
reversible first-order scavenging reaction. Dust fields are provided by Atmospheric
General Circulation Models. A database of marine dissolved Al measurements was
collated. The ocean model results for two different dust deposition fields [Andersen et
al., 1998; Mahowald et al., 1999] are compared with these data. The model confirms a
solubility of the aluminosilicate fraction between 1.5 and 3.0%. Modeled levels of
dissolved Al in surface waters mirror the delivery of dust to the surface ocean.
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| URI: | http://hdl.handle.net/1956/418 |
| ISSN: | 0886-6236 |
| Appears in Collections: | Eprints by the Geophysical Institute
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