WRF-Chem simulations of the atmospheric sea salt concentration in Japan

Atmospheric corrosion of the steel surface of a bridge is largely due to salt spays generated over the ocean. The observed data indicate that the salt sprays first adhere to the steel, after which the extent of Cl- on the steel surface increases.

In this study, the fully online coupled WRF-Chem model was utilized to estimate atmospheric Cl- iron in Japan.

We implemented in three sea salt schemes of WRF-Chem, GOCART, MOZART and MOSAIC. Ground-based observations has been used to verify the simulated sea salt concentration near surface. Results indicate that meteorological conditions near the surface, wind pattern was well reproduced by the model, but sea salt concentration in WRF-Chem simulation using three different sea salt schemes is not significantly improved.