Question

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? Temperature-Mineralization Feedback Co, Level us Primary Production Temperature N- Mineralization 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 Submit

Answer 1

Ans 4.23). Positive feedback loop that amplifies the inital change.

Ans 4.24). CO₂ level have been increased due to increasing rate of fossil fuel combustion.

Ans 4.25). The Haber-Bosch process does not contributing in dramatically increase the amount of bioavailable nitrogen circulating globally.