particle_ratio_offset: Particle Ratio Target
In christiaanpauw/AQoffset: Makes calculation needed for air quality offsetting

Description Usage Arguments Value Author(s)

Calculates the target of an offset intervention according to the particle equavalence approach (using the particle_ratio function)

particle_ratio_offset(result = c("target", "effect boundary")[1],
  int.eff = 0.5, effect = c("shortterm", "longterm")[1], units = NULL,
  minrat = 100, source1 = rep(40, 365), conc1 = NULL, source2 = rep(x =
  15, 365), conc2 = NULL)

`result`	What to return as result. Options: c("target", "effect boundary"). result == "target" returns the proportion of the offset source to be reduced in order to offset the managed activity at every receptor. result == "effect boundary" returns a one-layer raster with 1 in all the cells where an offset can take place and NA in all others. This can be used to select (mask) from other rasters.
`int.eff`	Proportion of source 2 that can be addressed by intervention.
`effect`	Options: c("shortterm", "longterm"). effect == "shortterm": do the calculation in terms of an immediate/short-term effect. This approach gives the result as exceedance counts (standard must not be NULL). effect = "longterm" aggregates the concentrations.
`units`	Numeric. How many units does source 2 consists of?. If NULL, report proportion default NULL.
`minrat`	The minimum source ratio for which an offset can be done.
`source1`	Numeric. Vector of the same length as nlayers(conc1). Total emissions.
`conc1`	A Raster object with concentrations resulting from source1. Average emissions.
`source2`	Numeric. Vector of the same length as nlayers(conc2).
`conc2`	A Raster. Object with concentrations resulting from source2.

A raster with the target expressed as proportion of the offset source to be reduced to offset the managed activity at every receptor (when result = "target") or the boudary of the area that can be offset using the particle equivalence approach when the efficiency of the intervention is int.eff.

Rebecca Garland, Christiaan Pauw

christiaanpauw/AQoffset documentation built on May 13, 2019, 6:57 p.m.