Calculate Finn Cycling Index for each province and year

Calculates the Finn Cycling Index (FCI) for the GRAFS nitrogen flow network following Finn (1976) and Allesina & Ulanowicz (2004). The index measures the fraction of total system throughput that is cycled through internal compartments (Cropland, semi-natural agroecosystems, Livestock, and People).

Usage

create_finn_indicator(n_prov_destiny = NULL, example = FALSE)

Arguments

n_prov_destiny

Nitrogen flows tibble from create_n_prov_destiny(). If NULL, loaded automatically.

example

If TRUE, return a small hardcoded output without downloading remote data. Default is FALSE.

Value

A tibble with columns year, province_name, and finn_index.

Examples

create_finn_indicator(example = TRUE)
#> # A tibble: 8 × 3
#>    year province_name finn_index
#>   <dbl> <chr>              <dbl>
#> 1  1900 A_Coruna          0.0942
#> 2  1900 Albacete          0.0765
#> 3  1900 Alicante          0.0476
#> 4  1900 Almeria           0.115 
#> 5  1900 Araba             0.112 
#> 6  1900 Asturias          0.137 
#> 7  1900 Avila             0.194 
#> 8  1900 Badajoz           0.113