permafrost
| Definition | Source | References |
|---|---|---|
Perennially frozen ground that occurs wherever the temperature remains below 0°C for several years. |
Americas assessment, Global assessment (1st work programme), Europe and Central Asia assessment | https://www.ipcc.ch/pdf/glossary/ar4-wg2.pdf |
Perennially frozen ground that occurs wherever the temperature remains below 0°C for several years. Ground (soil or rock and included ice and organic material) that remains at or below 0°C for at least two consecutive years. |
Land degradation and restoration assessment, Asia-Pacific assessment, Global assessment (1st work programme) |