Table 1 Spatial layers representing abiotic components of Antarctic ecosystems; includes ice-free areas used to define the typology extent, ten generic environmental variables and additional data on five Distinct Overlay environmental features.
From: A dataset of Antarctic ecosystems in ice-free lands: classification, descriptions, and maps
Layer | Description/units | Primary data source | Citations | URLs |
|---|---|---|---|---|
Ice-free rocks | Source data ice-free polygons were rasterized at 100 m resolution using ESRI ArcMap. | SCAR Antarctic Digital Database | Gerrish et al. 2020a | https://data.bas.ac.uk/items/077e1f04-7068-4327-a4f2-71d863f70064/ |
Burton-Johnson et al.3 | https://data.bas.ac.uk/metadata.php?id=GB/NERC/BAS/PDC/01394 | |||
Tóth & Terauds39 | https://data.aad.gov.au/metadata/AAS_4568_ice-free_rock_outcrop_union | |||
Elevation | Raw elevation data in metres above sea level | Reference Elevation Model of Antarctica from University of Minnesota | Howat et al.67 | |
server: https://data.pgc.umn.edu/elev/dem/setsm/REMA/mosaic/v1.1/100m/ | ||||
Slope | Elevation change in metres | Reference Elevation Model of Antarctica from University of Minnesota | Howat et al.67 | |
server: http://data.raadsync.cloud.edu.au/rema_processed/100m_200m/ | ||||
Rugosity | Terrain Ruggedness Index79 | Reference Elevation Model of Antarctica from University of Minnesota | Howat et al.67 | |
server: http://data.raadsync.cloud.edu.au/rema_processed/100m_200m/ | ||||
Solar | Clear sky radiation corrected for the incident angle, diffuse and reflected radiation. Dependent on time of year and time of day, latitude, slope, and aspect. Relief shading is not considered. Average insolation in W/m2 | Reference Elevation Model of Antarctica from University of Minnesota | Kumar et al.68 | |
server: http://data.raadsync.cloud.edu.au/rema_processed/100m_200m/ | ||||
Melt | CMS is the annual sum of the pixel days (units day km2) where melting occurs, times the pixel area (25 × 25 km2).” Layer is based on radiometric data collected 1979–2021, and has been interpolated to 1 × 1 km for this paper. | Cumulative melting surface (CMS) dataset by Picard and colleagues. | ||
Mean Annual Temperature | Temperature at 2 m height from surface as average of 3-hourly model output over 2014 and 2015. | 2014-2015 Antarctic Mesoscale Prediction System (AMPS) data | Powers et al.69 | https://www.earthsystemgrid.org/dataset/ucar.mmm.amps.output.html |
https://www2.mmm.ucar.edu/rt/amps/information/archive_info.html | ||||
Summer Season (Degree days >−5 °C) | Number of degree days over −5 °C; derived from the mean annual temperature layer. | 2014-2015 AMPS data | Powers et al.69 | https://www.earthsystemgrid.org/dataset/ucar.mmm.amps.output.html |
Total Annual Precipitation | Total snowfall per year in 2014-2015 | 2014-2015 AMPS data | Powers et al.69 | https://www.earthsystemgrid.org/dataset/ucar.mmm.amps.output.html |
Cloud | Fraction of sky covered by clouds as average of 3-hourly model output over 2014 and 2015 | 2014-2015 AMPS data | Powers et al.69 | https://www.earthsystemgrid.org/dataset/ucar.mmm.amps.output.html |
Wind | Wind speed at 10 m height from surface in m/s as average of 3-hourly model output from 2014 to 2015 | 2014-2015 AMPS data | Powers et al.69 | https://www.earthsystemgrid.org/dataset/ucar.mmm.amps.output.html |
Lakes | Polygon layer Antarctic lakes | British Antarctic Survey data catalogue | Gerrish et al. 2020b | https://data.bas.ac.uk/collections/e74543c0-4c4e-4b41-aa33-5bb2f67df389/ |
Rookeries | Point data for penguin rookeries, including species and records of penguin counts | Mapping Application for Penguin Populations and Projected Dynamics (MAPPPD) | open access database | |
Non volcanically heated areas | There is only one area in Antarctica exhibiting radiogenic heat, the Broknes Peninsula in the Larsemann Hills. This site is represented by a single ice-free polygon in the rock layer. | |||
Volcanoes | Latitude/longitude data for confirmed volcanoes in Antarctica | Compiled from Global Volcanism Program,USGS Geographic names information system, and published books. | LeMasurier et al. 1990; Oliver et al.73; Boutron74; Palais et al.75; Esser & Kyle76; Lee et al.77 | |
https://www.usgs.gov/us-board-on-geographic-names/antarctic-names |
