Q4.23. Some researchers have hypothesized that the feedback loop pictured below influences the carbon dynamics of Arctic ecosystems as follows: Elevated atmospheric CO2 levels cause the climate to warm, thawing permafrost. Nitrogen mineralization is then stimulated as thawed permafrost decomposes. The resulting increase in soil ammonium then stimulates primary production, which pulls CO2 from the air. What kind of feedback loop is described

A positive feedback loop that amplifies the initial change
A positive feedback loop that dampens the initial change
A negative feedback loop that amplifies the initial change
A negative feedback loop that dampens the initial change