Aeolian input of bioavailable iron to the ocean
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چکیده
منابع مشابه
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...
متن کاملThe Southern Ocean biological response to aeolian iron deposition.
Biogeochemical rate processes in the Southern Ocean have an important impact on the global environment. Here, we summarize an extensive set of published and new data that establishes the pattern of gross primary production and net community production over large areas of the Southern Ocean. We compare these rates with model estimates of dissolved iron that is added to surface waters by aerosols...
متن کاملDissolved 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])...
متن کاملAeolian iron input to the ocean through precipitation scavenging: A modeling perspective and its implication for natural iron fertilization in the ocean
[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 and removal by dry and wet deposition. Model results show extremely low dust concentrations over the equatorial Pacific and Southern Ocean. We find that wet deposition through precipitation scavengin...
متن کاملComment on "The Southern Ocean biological response to aeolian iron deposition".
Cassar et al. (Reports, 24 August 2007, p. 1067) proposed that aerosol-iron input enhances Southern Ocean export production. Their conclusion critically depends upon aerosol-iron modeling simulations not validated with iron-deposition data and dust dissolution rates based on Northern Hemisphere atmospheric chemical conditions (low pH). This diminishes the relevance of their findings and demonst...
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ژورنال
عنوان ژورنال: Geophysical Research Letters
سال: 2006
ISSN: 0094-8276
DOI: 10.1029/2005gl024852