Dry and wet deposition Sample Clauses

Dry and wet deposition. ‌ The dry deposition in LOTOS-EUROS is parameterised following the well-known resistance approach. The deposition speed is described as the reciprocal sum of three resistances: the aerodynamic resistance, the laminar layer resistance and the surface resistance. The aerodynamic resistance is dependent on atmospheric stability. The relevant stability parameters (u*, L and Kz) are calculated using standard similarity theory profiles. The laminar layer resistance and the surface resistances for acidifying components and particles are described following the EDACS system (Xxxxxxx et al., 1994). Below cloud scavenging is described using simple scavenging coefficients for gases (Xxxxxx et al., 2005) and following (Xxxxxxx et al., 2003) for particles. In-cloud scavenging is neglected due to the limited information on clouds. Neglecting in-cloud scavenging results in too low wet deposition fluxes but has a very limited influence on ground level concentrations (see Xxxxxx et al., 2004b). In v1.8, Xxxxx (2001) deposition scheme has been used for particles, explicitly including particle size and sedimentation. This parameterization replaces the earlier DEPAC deposition scheme for particles used in earlier versions (v1.6 and v1.7). XXXXX has also been updated for the gaseous particles from version 3.3 to version 3.11. The most important difference between these is that the previous version ignored the ammonia concentration at the surface and was mainly based on the IDEM description developed in the early 90s. The new DEPAC
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Related to Dry and wet deposition

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