606 research outputs found

    Global modeling study of potentially bioavailable iron input from shipboard aerosol sources to the ocean

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    Iron (Fe) is an essential element for phytoplankton. The majority of iron is transported from arid and semiarid regions to the open ocean, but it is mainly in an insoluble form. Since most aquatic organisms can take up iron only in the dissolved form, aerosol iron solubility is a key factor that can influence the air-sea CO2 fluxes and thus climate. Field observations have shown relatively high iron solubility in aerosols influenced by combustion sources, but specific emissions sources and their contributions to deposition fluxes largely remain uncertain. Here, a global chemical transport model is used to investigate the effect of aerosol emissions from ship plumes on iron solubility in particles from the combustion and dust sources. The model results reveal that the oil combustion from shipping mainly contributes to high iron solubility (> 10%) at low iron loading (1-110 ng m-3) observed over the high latitude North Atlantic Ocean, rather than the other combustion sources from continental industrialized regions. Due to continuing growth in global shipping and no regulations regarding particles emissions over the open ocean, the input of potentially bioavailable iron from ship plumes is likely to increase during the next century. The model results suggest that deposition of soluble iron from ships in 2100 contributes 30-60% of the soluble iron deposition over the high latitude North Atlantic and North Pacific

    Role of Acid Mobilization in Iron Solubility of Smaller Mineral Dust Aerosols

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    Poster abstract A21A-0013 presented at 2011 Fall Meeting, AGU, San Francisco, Calif., 5-9 Dec

    Geographical differences in bio-available iron supply between Northern and Southern Oceans

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    Session C32-poster W125A abstract, World Climate Research Programme (WCRP) Open Science Conference (24-28 October 2011, Denver, Colorado

    Role of air pollutant in bio-available iron input to the ocean

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    Poster abstract, 3rd iLEAPS Science Conference (September 18-23, 2011, Garmisch-Partenkirchen, Germany

    Role of acid mobilization in association of smaller particle size with higher iron solubility

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    Conference abstract (August 14-19, 2011, Goldschmidt 2011 in Prague, Czech Republic

    Development the interactive tonality blending system and artworks

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    The definition of "tonality" includes two meanings on artistic field. In the visual area, it means the system of tones or tints, or the color scheme, of a picture. In the meantime, it means the musical system of the relations of pitch, scale, chord and their progressions. In general, both definitions are expanded as the word that means the quality of visual, auditory perception. This artwork is the trial for assembling visual and auditory "tonality" in an interactive system

    Development the interactive tonality blending system and artworks

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    The definition of "tonality" includes two meanings on artistic field. In the visual area, it means the system of tones or tints, or the color scheme, of a picture. In the meantime, it means the musical system of the relations of pitch, scale, chord and their progressions. In general, both definitions are expanded as the word that means the quality of visual, auditory perception. This artwork is the trial for assembling visual and auditory "tonality" in an interactive system

    Foraging and fasting in the annual cycle of Adelie penguins

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    第6回極域科学シンポジウム[OB] 極域生物圏11月16日(月) 国立極地研究所1階交流アトリウ
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