getBioclimParam: Retrieving bioclimatic parameters
In ArthurPERE/biomass: Estimating Aboveground Biomass and Its Uncertainty in Tropical Forests

Description Usage Arguments Details Value Localisation Author(s) References Examples

This function extracts three bioclimatic parameters thanks to the coordinates of the data: the Climatic Water Deficit (CWD), the Temperature Seasonality (TS) and the Precipitation Seasonality (PS).

1	getBioclimParam(coord)

coord

Coordinates of the site(s), a matrix/dataframe with two columns (e.g. cbind(longitude, latitude)) (see examples).

The function is time-consuming at its first use as it downloads three raster files (one for each of the parameter) which are then stored in forders named wc2-5 and CWD (see Localisation).

However, as soon as the raster is downloaded once, the function then runs fast.

The function returns a data.frame with tempSeas (temperature seasonality, i.e. bioclimatic variable 4 from the Worldclim dataset; Hijmans et al. 2005), precSeas (precipitation seasonality, i.e. bioclimatic variable 15 from the Worldclim dataset; Hijmans et al. 2005) and CWD (climatic water deficit; Chave et al. 2014).

The localisation of the folder is :

On Linux : ~/.local/share/BIOMASS
On Mac OS X : ~/Library/Application Support/BIOMASS
On Windows 7 up to 10 : C:\Users\<username>\AppData\Local\BIOMASS\BIOMASS
On Windows XP : C:\Documents and Settings\<username>\Data\BIOMASS\BIOMASS

See this function for more information : rappdirs::user_data_dir()

Ariane TANGUY, Arthur PERE

Hijmans et al. (2005) Very high resolution interpolated climate surfaces for global land areas, International journal of climatology, 25(15), 1965-1978. Chave et al. (2014) Improved allometric models to estimate the above-ground biomass of tropical trees, Global Change Biology, 20 (10), 3177-3190

# One study site
lat <- 4.08
long <- -52.68
coord <- cbind(long, lat)
## Not run: 
bioclim <- getBioclimParam(coord)

## End(Not run)

# Several study sites (here three sites)
long <- c(-52.68, -51.12, -53.11)
lat <- c(4.08, 3.98, 4.12)
coord <- cbind(long, lat)
## Not run: 
bioclim <- getBioclimParam(coord)

## End(Not run)