BETR-Global process descriptions

class processes.process(model)

The class contains the intra-region process descriptions of BETR-Global as methods. Each method returns a dictionary containing D-values associated with the process identified by the dictionary keys:

{(from_compartmentID, to_compartmentID, processname) : D},

where processname is identical to the name of the method and D is the associated D-value [Pa/m^3/h]. Upon initialization, the class checks whether all processes in model.proclist are implemented. The class provides the method getD() that calls all process description methods and returns a dictionary containing all process D-values

betr_advectiveloss()

advective loss from the system

betr_air1_air2_mix()

mixing between upper and lower atmosphere

betr_air2_freshwater_diff()

diffusive exchange air-freshwater

betr_air2_freshwater_dissolution()

air-freshwater rain dissolution (the returned D-value refers to rain intensity during event (stwet))

betr_air2_freshwater_drydep()

dry particle deposition to fresh water

betr_air2_freshwater_wetparticle()

air-freshwater wet particle deposition (the returned D-value refers to rain intensity during event (stwet))

betr_air2_ocean_diff()

diffusive exchange air-ocean water

betr_air2_ocean_dissolution()

air-ocean water rain dissolution (the returned D-value refers to rain intensity during event (stwet))

betr_air2_ocean_drydep()

dry particle deposition to ocean water

betr_air2_ocean_wetparticle()

air-ocean water wet particle deposition (the returned D-value refers to rain intensity during event (stwet))

betr_air2_soil_diff()

diffusive exchange air-soil

betr_air2_soil_dissolution()

air-soil rain dissolution (the returned D-value refers to rain intensity during event (stwet))

betr_air2_soil_drydep()

dry particle deposition to soil

betr_air2_soil_wetparticle()

air-soil wet particle deposition (the returned D-value refers to rain intensity during event (stwet))

betr_air2_veg_diff()

diffusive air-vegetation exchange according to Cousins and Mackay, 2001 [1].

betr_air2_veg_dissolution()

air-vegetation rain dissolution (the returned D-value refers to rain intensity during event (stwet))

betr_air2_veg_drydep()

dry deposition to vegetation

betr_air2_veg_wetparticle()

wet particle deposition to vegetation (the returned D-value refers to rain intensity during event (stwet))

betr_degradation()

degradation

betr_freshwater_ocean_runoff()

fresh water to ocean runoff

betr_freshwater_sediment_deposit()

freshwater-sediment particle sedimentation

betr_freshwater_sediment_diff()

freshwater-sediment diffusion

betr_intermittent_rain()

Jolliet-Hauschild [2] calculation of intermittent rainfall. Uses the simplification implemented in BETR-Global.

betr_ocean_air_resusp()

marine aerosol production

betr_ocean_sinkflux()

fresh water to ocean runoff

betr_sediment_freshwater_resusp()

sediment resuspension in freshwater bodies

betr_soil_air_resusp()

terrestrial aerosol production

betr_soil_freshwater_erosion()

solids-runoff from soil to freshwater-bodies

betr_soil_freshwater_runoff()

water-runoff from soil to freshwater-bodies

betr_soil_veg_rootuptake()

soil-vegetation root uptake. The transpiration stream concentration factor (TSCF) is calculated according to Cousins and Mackay, 2001 [1].

betr_vegetation_soil_litter()

vegetation-soil tranfer through litterfall

getD()

construct dictionary with D-values for all intra-cell processes

[1]	(1, 2) Cousins, I.T. and Mackay, D. 2001. Strategies for including vegetation compartments in multimedia models. Chemosphere 44:643–654.

[2]	Jolliet, O. and Hauschild, M. 2005. Modeling the influence of intermittent rain events on long-term fate and transport of organic air pollutants. Environ. Sci. Technol. 39:4513–4522.