资源环境科技发展态势分析平台

We develop an improved, wind-driven lake spray aerosol (LSA) emissions parameterization that resolves particle size and size-independent chemical composition, and investigate the impact of these emissions on regional chemistry in the Great Lakes region. We conduct WRF-Chem simulations for November 2015, a time period with high LSA emissions. LSA particles emitted from the surface of the Great Lakes increase particulate by 37% over the Great Lakes and by 13% over land, primarily due to heterogeneous reactions between CaCO₃ and HNO₃. Cations emitted from lake spray affect the thermodynamic equilibrium, reducing particulate by 16% over the Great Lakes and by 7% over the surrounding land. This also influences gas-phase species in the region, decreasing nitric acid by up to 32% over lakes. Overall, these simulations suggest that understanding LSA and its impact on other air pollutants is important for determining health and climate effects in the Great Lakes region.