How could tundra warming create a positive climate feedback loop?

Tundra warming creates a positive climate feedback loop primarily through the thawing of permafrost and changes in surface reflectivity, known as albedo.12

Permafrost Thawing

Tundra and taiga soils store approximately one-third of the world's soil carbon in the form of dead organic matter. As temperatures rise, permafrost thaws, exposing this organic material to microbial decomposition. This process releases carbon dioxide and methane into the atmosphere. Because methane has roughly 25 times the greenhouse warming potential of carbon dioxide, its release significantly increases surface temperatures, which in turn accelerates further permafrost thawing and additional greenhouse gas emissions.12

Albedo Reduction

Warming also alters the physical landscape, reducing the tundra's ability to reflect solar radiation.1
* Vegetation Changes: As the climate warms, darker-colored coniferous trees and shrubs migrate into areas previously covered by lighter-colored snow and ice.1
* Ice Loss: The melting of sea ice exposes the darker ocean surface.1

These darker surfaces absorb more solar radiation rather than reflecting it, leading to increased regional warming and further environmental degradation.1