Why can heavy vehicle traffic damage Arctic tundra and frozen ground?

Heavy vehicle traffic can cause significant damage to the Arctic tundra and frozen ground because it disrupts the delicate thermal balance of the permafrost.12

When heavy vehicles move across the tundra, they can disturb or remove the insulating layer of vegetation that protects the frozen ground beneath. This disruption exposes the underlying ice-rich soil to warmer temperatures, causing the ground ice to melt. As this ice thaws, the ground settles unevenly, leading to the formation of thermokarst features such as pits, mounds, sinkholes, and hummocky terrain.34

These localized disturbances create swampy or uneven ground, which can permanently alter the landscape and compromise the integrity of the tundra ecosystem. Because the Arctic environment is highly sensitive, such physical damage to the soil and vegetation can have long-lasting effects on the local habitat.312