Mineralogy as a critical factor of dust iron solubility
@article{Journet2008MineralogyAA, title={Mineralogy as a critical factor of dust iron solubility}, author={Emilie Journet and Karine Desboeufs and Sandrine Caquineau and Jean-Louis Colin}, journal={Geophysical Research Letters}, year={2008}, volume={35} }
To understand the impact of dust deposition on ocean primary productivity, the evaluation of dust input is not sufficient, and the soluble iron supply is also needed. Measurements of iron in aerosols suggest a much higher solubility than in soil, implying substantial atmospheric processing of chemical or physical nature. Here, we have investigated the effect of the mineralogy on iron solubility. We have measured iron solubility from some minerals commonly found in dust (clay, feldspar and iron…
242 Citations
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References
SHOWING 1-10 OF 27 REFERENCES
Estimates of atmospheric-processed soluble iron from observations and a global mineral aerosol model: Biogeochemical implications
- Environmental Science, Geology
- 2004
[1] Desert dust deposition to the ocean may be a significant source of biogeochemically important elements, specifically iron. The bioavailability of iron in the oceans requires it to be in a soluble…
Aeolian input of bioavailable iron to the ocean
- Environmental Science
- 2006
Atmospheric deposition of mineral dust supplies much of the essential nutrient iron to the ocean. Presumably only the readily soluble fraction is available for biological uptake. Previous ocean…
Atmospheric global dust cycle and iron inputs to the ocean
- Environmental Science
- 2005
Since iron is an important micronutrient, deposition of iron in mineral aerosols can impact the carbon cycle and atmospheric CO2. This paper reviews our current understanding of the global dust cycle…
Mineral particle size as a control on aerosol iron solubility
- Environmental Science
- 2006
Aerosol iron solubility is a major uncertainty in the global biogeochemical cycle of iron and, via its impact on ocean productivity, the carbon cycle and their influence on global climate. Previous…
Atmospheric transport of iron and its deposition in the ocean
- Environmental Science
- 1991
The atmospheric transport of continental weathering products is responsible for much of the mineral material and Fe entering the open ocean and is probably the dominant source of nutrient Fe in the…
Iron mobilization in mineral dust: Can anthropogenic SO2 emissions affect ocean productivity?
- Environmental Science
- 2003
For Fe contained in long‐range transported aeolian dust to act as a micronutrient for oceanic phytoplankton it must be first dissolved or mobilized. We propose that Fe‐mobilization can occur in…
Aeolian iron input to the ocean through precipitation scavenging: A modeling perspective and its implication for natural iron fertilization in the ocean
- Environmental Science
- 2003
[1] Aeolian dust input may be a critical source of dissolved iron for phytoplankton growth in some oceanic regions. We used an atmospheric general circulation model (GCM) to simulate dust transport…
Chemistry of iron in marine aerosols
- Environmental Science
- 1992
Abstract. Remote marine aerosols collected at four Pacific island stations (Midway, Oahu, Enewetak, and Fanning) and during four Pacific cruises were used in determining the chemical form of iron in…
Baseline studies of the clay minerals society source clays: Chemical analyses of major elements
- Geology
- 2001
Chemical analysis is an essential step to establish the nature of minerals (Newman, 1987). The techniques used in rock and mineral analyses are generally valid for the analyses of clays. Additional…