Table 3.

Description of each column in The Arctic plant aboveground biomass synthesis dataset.

#	Column Name	Format	Units	Description
1	dataset_id	character	—	Dataset identifier assigned upon intake
2	contributor	character	—	Name(s) of data contributor(s)
3	country	character	—	Name of country where field data were collected
4	locale	character	—	Name of the general area where field data were collected
5	site_id	character	—	Site identifier that is unique within an individual dataset
6	site_code	character	—	Site code that is unique within the synthesis dataset based on concatenation of country, locale, and site_id
7	plot_id	character	—	Plot identifier that is unique within an individual site
8	plot_code	character	—	Plot code that is unique within the synthesis dataset based on concatenation of country, locale, site_id, and plot_id
9	coord_type	character	—	Coordinate type (site or plot)
10	latitude	numeric	°	Site or plot latitude in decimal degrees (WGS84)
11	longitude	numeric	°	Site or plot longitude in decimal degrees (WGS84)
12	year	numeric	year	Year when field data were collected
13	month	numeric	month	Month when field data were collected
14	day	numeric	day	Day of month when field data were collected
15	pft	character	–	Plant functional type (lichen, bryophyte, herb, shrub, tree, or total)
16	plot_area_m2	numeric	m2	Plot area used to harvest or survey vegetation
17	method	character	—	Method used to determine biomass dry weight (harvest, survey, harvest + survey, or unmeasured)
18	biomass_dry_weight_g	numeric	g	Aboveground biomass on sample plot in units of grams of oven-dried live biomass
19	biomass_density_gm2	numeric	g m2	Aboveground biomass on sample plot in units of grams of oven-dried live biomass per square meter of ground surface
20	vegetation_description	character	—	Description of the vegetation community where sampling occurred
21	site_description	character	—	Description of the field site where sampling occurred
22	bioclim_zone	character	—	Bioclimatic zone (High Arctic, Low Arctic, Oroarctic, or Subarctic)
23	mat_degC	numeric	°C	Mean annual temperature (1981–2010) from the Chelsa Bioclim dataset
24	gdd_degC	numeric	°C	Mean annual growing degree days (1981–2010) with a 0 °C base from the Chelsa Bioclim dataset
25	map_mm	numeric	mm	Mean annual precipitation (1981–2010) from the Chelsa Bioclim dataset
26	community_measured	logical	—	Were lichen, bryophyte, herb, shrub, and tree biomass measured on the sample plot? (true or false)
27	plants_measured	logical	—	Were bryophyte, herb, shrub, and tree biomass measured on the sample plot? (true or false)
28	nontree_measured	logical	–	Were lichen, bryophyte, herb, and shrub biomass measured on the sample plot? (true or false)
29	vascular_measured	logical	—	Were herb, shrub, and tree biomass measured on the sample plot? (true or false)
30	woody_measured	logical	—	Were shrub and tree biomass measured on the sample plot? (true or false)
31	citation	character	—	Full citation to the original data source
32	citation_short	character	—	Shortened citation to the original data source
33	notes	character	—	Miscellaneous notes