Inferring episodic atmospheric iron fluxes in the Western South Atlantic
Evangelista, H.; Maldonado, J.; dos Santos, E.A.; Godoi, R.H.M.; Garcia, C.A.E.; Garcia, V.M.T.; Johnson, E.; da Cunha, K.D.; Leite, C.B.; Van Grieken, R.; Van Meel, K.; Makarovska, Y.; Gaiero, D.M. (2010). Inferring episodic atmospheric iron fluxes in the Western South Atlantic. Atmos. Environ. (1994) 44(5): 703-712. dx.doi.org/10.1016/j.atmosenv.2009.11.018
In: Atmospheric Environment (1994). Pergamon: Oxford. ISSN 1352-2310; e-ISSN 1873-2844, meer
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| Trefwoorden |
Chemical elements > Metals > Transition elements > Heavy metals > Iron
Colloids > Aerosols
Cycles > Chemical cycles > Geochemical cycle > Biogeochemical cycle
Dust > Eolian dust
Argentina, Patagonia [Marine Regions]
Marien/Kust |
| Author keywords |
Patagonia; Iron deposition; Western South Atlantic; Aerosols |
| Auteurs | | Top |
- Evangelista, H.
- Maldonado, J.
- dos Santos, E.A.
- Godoi, R.H.M., meer
- Garcia, C.A.E.
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- Garcia, V.M.T.
- Johnson, E.
- da Cunha, K.D.
- Leite, C.B.
|
- Van Grieken, R., meer
- Van Meel, K., meer
- Makarovska, Y.
- Gaiero, D.M.
|
| Abstract |
Iron (Fe) and other trace elements such as Zn, Mn, Ni and Cu are known as key-factors in marine biogeochemical cycles. It is believed that ocean primary productivity blooms in iron deficient regions can be triggered by iron in aeolian dust. Up to now, scarce aerosol elemental composition, based on measurements over sea at the Western South Atlantic (WSA), exist. An association between the Patagonian semi-desert dust/Fe and chlorophyll-a variability at the Argentinean continental shelf is essentially inferred from models. We present here experimental data of Fe enriched aerosols over the WSA between latitudes 22°S–62°S, during 4 oceanographic campaigns between 2002 and 2005. These data allowed inferring the atmospheric Fe flux onto different latitudinal bands which varied from 30.4 to 1688 nmolFe m-2 day-1 (October 29th–November 15th, 2003); 5.83–1586 nmolFe m-2 day-1 (February 15th–March 6th, 2004) and 4.73–586 nmolFe m-2 day-1(October 21st–November 5th, 2005). |
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