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Apply temporal adjustment and compute temporal variance in plot biomass

TempApplyVar.Rd

This function adjusts plot biomass values to a specified map year using growth-rate increments and computes the temporal variance (standard deviation) of biomass changes based on growth-rate standard deviations. It combines the functionality of TempApply and TempVar into a single call.

Usage

TempApplyVar(plt, map_year, gez = "all", gr = NULL, sds = NULL)

Arguments

plt

A data frame or sf object containing plot data. For data frame input format, longitude and latitude coordinates should be placed under "POINT_X" and "POINT_Y" columns respectively in WGS 84 CRS.

map_year

Numeric value indicating the AGB map year.

gez

Character string specifying the Global Ecological Zones (GEZ) of interest to apply. If "all" (default), all GEZ in plt will be calculated.

gr

Optional data.frame of growth rates containing columns GEZ, ZONE, FAO.ecozone, GR1, GR2, GR3. If NULL, default data from Plot2Map is used.

sds

Optional data.frame of growth rate standard deviations containing columns GEZ, ZONE, FAO.ecozone, SD1, SD2, SD3. If NULL, default data from Plot2Map is used.

Value

A data.frame with the following columns:

AGB_T_HA

Adjusted biomass values for the specified map_year.

AGB_T_HA_ORIG

Original biomass values before adjustment.

sdGrowth

Temporal standard deviation of the biomass adjustment.

Additional

All other columns from the input plt.

Examples

library(Plot2Map)
set.seed(42)
sample_plots <- plots[sample(nrow(plots), 10), ]
sample_plots_gez <- BiomePair(sample_plots)
result <- TempApplyVar(sample_plots_gez, map_year = 2004)
head(result)
#>   PLOT_ID AGB_T_HA AVG_YEAR SIZE_HA   POINT_X  POINT_Y   ZONE
#> 1     EU2 97.17177     2001   0.196  1.305915 42.59214 Europe
#> 2     EU2 62.49786     2000   0.196 -3.988935 40.33963 Europe
#> 3     EU2 57.64102     2003   0.196 -2.707056 42.68534 Europe
#> 4     EU1 63.39700     2008   0.015 15.218726 59.81792 Europe
#> 5     EU2 82.59592     2007   0.196 -7.182390 37.34714 Europe
#> 6     EU2 33.56841     2007   0.196 -7.216243 37.34765 Europe
#>                   FAO.ecozone         GEZ AGB_T_HA_ORIG sdGrowth
#> 1   Temperate mountain system   Temperate      87.87177      9.3
#> 2      Subtropical dry forest Subtropical      46.49786     16.0
#> 3 Subtropical mountain system Subtropical      55.14102      2.5
#> 4    Boreal coniferous forest      Boreal      67.79700      4.4
#> 5      Subtropical dry forest Subtropical      94.59592     12.0
#> 6      Subtropical dry forest Subtropical      45.56841     12.0