Meaning of permafrost

1. The permafrost in Siberia remains frozen year-round due to its extreme cold temperatures.
2. The melting permafrost in the Arctic is releasing trapped greenhouse gases into the atmosphere.
3. Engineers have to take into account the presence of permafrost when building structures in cold regions.
4. The permafrost beneath the surface of Alaska is rapidly thawing, causing the ground to sink and making infrastructure unstable.
5. The vegetation in the tundra is adapted to grow in the thin layer of soil above the permafrost.
6. Scientists study the composition of permafrost cores to understand past climate conditions.
7. The permafrost acts as a barrier that prevents water from draining, resulting in the formation of wetlands.
8. Mining companies are increasingly interested in exploiting the resources that lie beneath the permafrost.
9. The permafrost layer can be several meters thick in some regions of Antarctica.
10. The melting of permafrost is a major concern for indigenous communities who rely on it for hunting and fishing.