paleofiresites {GCD}

GCD sites information

Description

Sites description and features

Format

A data frame with 881 observations on the following 17 variables.

id_site

sites primary key from GCD v4.x.x

id_site_old

sites primary key from GCD v3.x.x, deprecated

pref_units

a factor, see help("charcoal_units") and data("charcoal_units") for details

site_name

a character vector

lat

a numeric vector

long

a numeric vector

elevation

a numeric vector of elevations

country

a character vector

continent

a factor with levels Africa Antarctica Asia Australia Europe North America South America

ISO3

ISO3 code by country

num_dating

a numeric vector

min_est_age

a numeric vector

max_est_age

a numeric vector

num_samp

a numeric vector

has_depth

factor indicating presence of depths associated to ages

date_int

a numeric vector, interval in years between two dates

qtype

a factor, see help("charcoal_units") and data("charcoal_units") for details

water_depth

a numeric vector

depo_context

a character vector, see help("depo_contex") and data("depo_contex") for details

id_site_type

a character vector, see help("site_type") and data("site_type") for details

id_basin_size

a character vector, see help("basin_size") and data("basin_size") for details

id_lands_desc

a character vector, see help("lands_desc") and data("lands_desc") for details

l12

a numeric vector, Levavasseur et al. 2012

rf99

a numeric vector, Ramankutty et al. 1999

gcd_version

main GCD releases

num_version

a numeric vector: version number 401 meaning 4.0.1

update_date

date of data update in the GCD

Details

l12 levels0= Water
1= Boreal forest
2= Desert vegetation
3= Grassland and dry shrubland
4= Savannas abd dry woodlands
5= Temperate forest
6= Tropical forest
7= Tundra
8= Warm temperate
9= Warm desert
10= Cold desert

rf99 levels 0= Water
1= Tropical Evergreen Forest/Woodland
2= Tropical Deciduous Forest/Woodland
3= Temperate Broadleaf Evergreen Forest/Woodland
4= Temperate Needleleaf Evergreen Forest/Woodland
5= Temperate Deciduous Forest/Woodland
6= Boreal Evergreen Forest/Woodland
7= Boreal Deciduous Forest/Woodland
8= Evergreen/Deciduous Mixed Forest/Woodland
9= Savanna
10= Grassland/Steppe
11= Dense Shrubland
12= Open Shrubland
13= Tundra
14= Desert
15= Polar Desert/Rock/Ice

References

Ramankutty, N., and J.A. Foley (1999). Estimating historical changes in global land cover: croplands from 1700 to 1992, Global Biogeochemical Cycles 13(4), 997-1027.

Levavasseur, G., M. Vrac, D. M. Roche, and D. Paillard. 2012. Statistical modelling of a new global potential vegetation distribution. Environmental Research Letters 7:044019.

Examples

data(paleofiresites)
## maybe str(paleofiresites) ; plot(paleofiresites) ...