Dust, wildfires, and anthropogenic combustion emit nutrients important for land and ocean biota. Metals are also excellent absorbers of incoming shortwave solar radiation. We study the impacts of iron (Fe) and other minerals starting from their emissions, their atmospheric transport, and their subsequent impacts on Earth's radiation budget as well as ocean biogeochemistry.
We developed emission inventories (such shown below for anthropogenic combustion) for various sources such as coal combustion, smelting, etc, from pre-industrial times to 2100.
We then feed these emission inventories into an atmospheric transport model (CESM-CAM5) to simulate the aerosol-iron concentrations and deposition. These modeled concentration and deposition fields are then used in radiative transfer models and ocean biogeochemistry models to estimate the impacts as Radiative Forcing or Net Primary Productivity change over time.
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