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. Author manuscript; available in PMC: 2020 Jul 1.
Published in final edited form as: Sci Total Environ. 2019 Mar 26;672:410–426. doi: 10.1016/j.scitotenv.2019.03.350

Table 2.

Summary of parameters required to calculate the dry deposition over GI surfaces.

Resistance Meteorological parameters Topographical parameters GI parameters Pollutant parameters
Ra Temperature; density of air; Specific heat; sensible heat; Friction velocity; Wind speed and direction Terrain data; Building geometry - Source location and elevation; Source outlet velocity; Source geometry
Rb Kinematic viscosity; Thermal conductivity; Air dynamic viscosity;
Temperature; Cunningham factor, particle relaxation time, thermal conductivity; Heat
capacity per unit volume		 Land cover/use data; Surface roughness - Molecular diffusivity; particle diameter
Rs Air temperature, solar radiation; Solar elevation angle; Diffusion and directbeam solar radiation; Conductance-reducing effects of air temperature The angle between the leaf and the sun Photosynthetically Active Radiation (PAR); Leaf water potential; vapour pressure deficit, LAI; Water vapour pressure deficit; Molecular diffusion
Rm - - Net photosynthesis rate per leaf area; Type of species, Henry law constant; Absolute temperature, gas constant
Rlu Atmospheric acids; Ambient air temperature; Relative humidity; Seasonal conditions, - The thickness and chemical composition of leafsurface water-layer; LAI; Pollutant concentration over leaf; Cuticle surface area; Formation, growth and fate of water films; Type of species; Age of leaf Pollutant concentration; Rate of pollutant interaction, pollutant composition,
Rdc Solar radiation; Solar elevation angle Slope of the local terrain - -
Rcl - - Bark area index; Porosity; Areal density; Stem area Henry law constant; Absolute temperature; Gas constant, reactivity factor for gases; Baseline lower canopy resistance for SO2 and O3
Rac Friction velocity; Wind speed and direction - Canopy height; Leaf area Index -
Rgs and Rsoil Relative humidity; Ambient concentration of air pollutant and solar radiation pH value of soil; Soil moisture content - -
Rb (for particles) Schmidt number; Air kinematic viscosity; Friction velocity; Air dynamic viscosity; Stokes number; Density of air; Ambient Temperature;
Relative humidity		 Surface rough; Land use cover LAI; Height of canopy Particle’s Brownian diffusivity; Cunningham factor; Particle’s settling velocity; particle relaxation time; Particle diameter; Particle density;
Vs Density of air; Gravitational acceleration; Air kinematic viscosity - - Particle diameter; Particle density; Cunningham factor