Japan Geoscience Union Meeting 2018

Presentation information

[JJ] Oral

A (Atmospheric and Hydrospheric Sciences) » A-CG Complex & General

[A-CG41] Biogeochemical linkages between the ocean and the atmosphere during phytoplankton blooms

Tue. May 22, 2018 1:45 PM - 3:15 PM 106 (1F International Conference Hall, Makuhari Messe)

convener:Yuzo Miyazaki(Institute of Low Temperature Science, Hokkaido University), Jun Nishioka(Hokkaido University, Institute of low temperature sciences), Koji Suzuki(北海道大学, 共同), Yoko Iwamoto(Graduate School of Biosphere Science, Hiroshima University), Chairperson:Miyazaki Yuzo(Institute of low temperature science, Hokkaido University)

2:00 PM - 2:15 PM

[ACG41-02] Attribution of iron in aerosols to combustion sources

*Akinori Ito1, Stelios Myriokefalitakis2, Maria Kanakidou3, Natalie Mahowald4, Rachel A. Scanza4, Douglas Hamilton4, Alex Baker5, Tim Jickells5, Manmohan Sarin6, Bikkina Srinivas7, Yuan Gao8, Rachel Shelley9, Clifton Buck10, William Landing9, Andrew Bowie11, Morgane Perron11, Thibaut Wagener12, Cecile Guieu12, Nicholas Meskhidze13, Matthew Johnson14, Yan Feng15, Robert Duce16 (1.Japan Agency for Marine-Earth Science and Technology, 2.Utrecht University, 3.Univ. of Crete, 4.Cornell Univ., 5.Univ. of East Anglia, 6.Physical Research Laboratory, 7.Stockholm Univ., 8.Rutgers Univ., 9.Florida State Univ., 10.Univ. of Georgia, 11.Univ. of Tasmania, 12.Laboratoire d'Océanographie de Villefranche, 13.North Carolina State Univ., 14.Ames Research Center, 15.Argonne National Laboratory, 16.Texas AM Univ.)

Keywords:combustion aerosol, mineral aerosol, environmental changes

Atmospheric deposition of iron (Fe) to the ocean has been suggested to modulate primary ocean productivity and thus indirectly affect the climate. However, there are large uncertainties regarding the relative importance of different sources of Fe and effects of atmospheric processing on the bioavailability of the delivered Fe. Here, we compared Fe loading and solubility in aerosols from four atmospheric chemistry transport models and a number of field measurements. The model results suggest that combustion aerosols substantially contribute to labile Fe loading at high solubility in aerosols. Thus, assessments of dust-borne Fe fertilization of open oceans should include Fe-containing mineral aerosols affected by combustion sources.