# Chemistry and aerosols

SURFEX is able to evaluate using several models and parameterisations :

Emission parameterizations :

• The dust fluxes are calculated using the Dust Entrainment And Deposition (DEAD) model (Zender et al. [2003])
• Sea Salt emission are parameterized upon the formulation of Vignati et al. [2001] (effective source function) or upon a lookup table defined by Schulz et al. [2004].

Deposition parameterizations :

• Dry deposition is usually parametrized through a deposition velocity
• Dry deposition and sedimentation of aerosols are driven by the Brownian diffusivity and by the gravitational velocity