Iron input

Dissolved iron input to the ocean

Factors influencing the dissolved iron input by river water to the open ocean R. Krachler, F. Jirsa, and S. Ayromlou Institute of Inorganic Chemistry – Bioinorganic, Environmental and Radiochemistry, Vienna University, Waehringerstraße 42, A1090 Vienna, Austria Received: 22 March 2005 – Accepted: 13 April 2005 – Published: 9 May 2005 Correspondence to: R. Krachler ([email protected])...

Aeolian input of bioavailable iron to the ocean

[1] 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 models assumed this fraction was constant. Here the variable solubility of Fe in aerosols and precipitation is parameterized with a two-step mechanism, the development of a sulfate coating followed b...

Input and cycling of iron in the Gulf of Aqaba, Red Sea

[1] The Gulf of Aqaba, northern Red Sea, is an ideal natural laboratory for studying the impact of atmospheric dry deposition of iron to the ocean surface. We have measured atmospheric iron deposition weekly for 18 months, and dissolved and total dissolvable iron concentrations in the stratified summer (August) and well-mixed winter (March) water column. Concentrations of dissolved and total di...

Factors influencing the dissolved iron input by river water to the open ocean

The influence of natural metal chelators on the bio-available iron input to the ocean by river water was studied. Ferrous and ferric ions present as suspended colloidal particles maintaining the semblance of a dissolved load are coagulated and settled as their freshwater carrier is mixed with seawater at the continental boundary. However, we might argue that different iron-binding colloids beco...

ATMOSPHERIC INPUT OF MANGANESE AND IRON TO THE OCEAN: Seawater dissolution experiments with organic ligands