BlackCarbon (version 0.1.0)

filter_loading: Filter loading correction

Description

This function is applied when we already have black carbon concentration processed by ONA algorithm. Since Black carbon concentration measured by AE51 substantially decreases when the filter loading goes up, we can apply filter correction function to adjust for that.

Usage

filter_loading(data, ONA_BC = "BC_ONA", ATN = "ATN")

Arguments

data

a datafram containing the raw data of black carbon.

ONA_BC

the column having black carbon concentration processed by ONA algorithm.

ATN

the column having ATN coefficient.

Value

The default mthod returns a vector with equal length as the dataframe.

Details

This method is applicable even when the raw files are compiled as it uses the corresponding ATN values to correct for filter loading of black carbon concentration

References

Kirchstetter, T.W., Novakov, T., 2007. Controlled generation of black carbon particles from a diffusion flame and applications in evaluating black carbon measurement methods. Atmospheric Environment 41, 1874-1888 Available from: https://doi.org/10.1016/j.atmosenv.2006.10.067

See Also

ONA

Examples

# NOT RUN {
data(data_ONA)#loading the example dataset
#calculating ONA processed black carbon first
data_ONA$ONA_BC<-ONA(data=data_ONA, ATN = "ATN", BC ="BC", dATN =0.05)
filter_loading(data =data_ONA, ATN = "ATN", ONA_BC="BC")

## The function is currently defined as
function (data, ONA_BC = "BC_ONA", ATN = "ATN")
{
    data[, ONA_BC] * (0.88 * exp(-(data[, ATN])/100) + 0.12)^(-1)
  }
# }