[A-CG09] Development and application of land and ocean biogeochemistry components of Earth system models

[ACG09-P06] Mineral aerosol as a source of iron for the marine ecosystems in the Southern Ocean

*Akinori Ito¹, Jasper F. Kok² (1.Japan Agency for Marine-Earth Science and Technology, 2.University of California, Los Angeles)

Keywords:Aerosols , Global Biogeochemical Cycles, Atmospheric chemistry transport model

Atmospheric deposition of dust source materials is a significant source of exogenous iron (Fe) in marine ecosystems. Especially, the Southern Ocean is the most biogeochemically important ocean because of its large spatial extent and its considerable influence on the global carbon cycle. However, there is large uncertainty in our estimate of the dust emissions in the Southern Hemisphere. Here, we implement a newly developed dust emission scheme into a global atmospheric chemistry transport model to produce better agreement with measurements of Fe loading over the oceans.